/* util.c * * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "Very useful, no doubt, that was to Saruman; yet it seems that he was * not content." --Gandalf */ /* This file contains assorted utility routines. * Which is a polite way of saying any stuff that people couldn't think of * a better place for. Amongst other things, it includes the warning and * dieing stuff, plus wrappers for malloc code. */ #include "EXTERN.h" #define PERL_IN_UTIL_C #include "perl.h" #ifndef PERL_MICRO #include #ifndef SIG_ERR # define SIG_ERR ((Sighandler_t) -1) #endif #endif #ifdef I_SYS_WAIT # include #endif #ifdef HAS_SELECT # ifdef I_SYS_SELECT # include # endif #endif #define FLUSH #if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC) # define FD_CLOEXEC 1 /* NeXT needs this */ #endif /* NOTE: Do not call the next three routines directly. Use the macros * in handy.h, so that we can easily redefine everything to do tracking of * allocated hunks back to the original New to track down any memory leaks. * XXX This advice seems to be widely ignored :-( --AD August 1996. */ /* paranoid version of system's malloc() */ Malloc_t Perl_safesysmalloc(MEM_SIZE size) { dTHX; Malloc_t ptr; #ifdef HAS_64K_LIMIT if (size > 0xffff) { PerlIO_printf(Perl_error_log, "Allocation too large: %lx\n", size) FLUSH; my_exit(1); } #endif /* HAS_64K_LIMIT */ #ifdef DEBUGGING if ((long)size < 0) Perl_croak_nocontext("panic: malloc"); #endif ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */ PERL_ALLOC_CHECK(ptr); DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); if (ptr != Nullch) return ptr; else if (PL_nomemok) return Nullch; else { /* Can't use PerlIO to write as it allocates memory */ PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); my_exit(1); return Nullch; } /*NOTREACHED*/ } /* paranoid version of system's realloc() */ Malloc_t Perl_safesysrealloc(Malloc_t where,MEM_SIZE size) { dTHX; Malloc_t ptr; #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO) Malloc_t PerlMem_realloc(); #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */ #ifdef HAS_64K_LIMIT if (size > 0xffff) { PerlIO_printf(Perl_error_log, "Reallocation too large: %lx\n", size) FLUSH; my_exit(1); } #endif /* HAS_64K_LIMIT */ if (!size) { safesysfree(where); return NULL; } if (!where) return safesysmalloc(size); #ifdef DEBUGGING if ((long)size < 0) Perl_croak_nocontext("panic: realloc"); #endif ptr = (Malloc_t)PerlMem_realloc(where,size); PERL_ALLOC_CHECK(ptr); DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++)); DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); if (ptr != Nullch) return ptr; else if (PL_nomemok) return Nullch; else { /* Can't use PerlIO to write as it allocates memory */ PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); my_exit(1); return Nullch; } /*NOTREACHED*/ } /* safe version of system's free() */ Free_t Perl_safesysfree(Malloc_t where) { #ifdef PERL_IMPLICIT_SYS dTHX; #endif DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++)); if (where) { /*SUPPRESS 701*/ PerlMem_free(where); } } /* safe version of system's calloc() */ Malloc_t Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size) { dTHX; Malloc_t ptr; #ifdef HAS_64K_LIMIT if (size * count > 0xffff) { PerlIO_printf(Perl_error_log, "Allocation too large: %lx\n", size * count) FLUSH; my_exit(1); } #endif /* HAS_64K_LIMIT */ #ifdef DEBUGGING if ((long)size < 0 || (long)count < 0) Perl_croak_nocontext("panic: calloc"); #endif size *= count; ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */ PERL_ALLOC_CHECK(ptr); DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size)); if (ptr != Nullch) { memset((void*)ptr, 0, size); return ptr; } else if (PL_nomemok) return Nullch; else { /* Can't use PerlIO to write as it allocates memory */ PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); my_exit(1); return Nullch; } /*NOTREACHED*/ } /* These must be defined when not using Perl's malloc for binary * compatibility */ #ifndef MYMALLOC Malloc_t Perl_malloc (MEM_SIZE nbytes) { dTHXs; return (Malloc_t)PerlMem_malloc(nbytes); } Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size) { dTHXs; return (Malloc_t)PerlMem_calloc(elements, size); } Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes) { dTHXs; return (Malloc_t)PerlMem_realloc(where, nbytes); } Free_t Perl_mfree (Malloc_t where) { dTHXs; PerlMem_free(where); } #endif /* copy a string up to some (non-backslashed) delimiter, if any */ char * Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen) { register I32 tolen; for (tolen = 0; from < fromend; from++, tolen++) { if (*from == '\\') { if (from[1] == delim) from++; else { if (to < toend) *to++ = *from; tolen++; from++; } } else if (*from == delim) break; if (to < toend) *to++ = *from; } if (to < toend) *to = '\0'; *retlen = tolen; return from; } /* return ptr to little string in big string, NULL if not found */ /* This routine was donated by Corey Satten. */ char * Perl_instr(pTHX_ register const char *big, register const char *little) { register const char *s, *x; register I32 first; if (!little) return (char*)big; first = *little++; if (!first) return (char*)big; while (*big) { if (*big++ != first) continue; for (x=big,s=little; *s; /**/ ) { if (!*x) return Nullch; if (*s++ != *x++) { s--; break; } } if (!*s) return (char*)(big-1); } return Nullch; } /* same as instr but allow embedded nulls */ char * Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend) { register const char *s, *x; register I32 first = *little; register const char *littleend = lend; if (!first && little >= littleend) return (char*)big; if (bigend - big < littleend - little) return Nullch; bigend -= littleend - little++; while (big <= bigend) { if (*big++ != first) continue; for (x=big,s=little; s < littleend; /**/ ) { if (*s++ != *x++) { s--; break; } } if (s >= littleend) return (char*)(big-1); } return Nullch; } /* reverse of the above--find last substring */ char * Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend) { register const char *bigbeg; register const char *s, *x; register I32 first = *little; register const char *littleend = lend; if (!first && little >= littleend) return (char*)bigend; bigbeg = big; big = bigend - (littleend - little++); while (big >= bigbeg) { if (*big-- != first) continue; for (x=big+2,s=little; s < littleend; /**/ ) { if (*s++ != *x++) { s--; break; } } if (s >= littleend) return (char*)(big+1); } return Nullch; } #define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/ /* As a space optimization, we do not compile tables for strings of length 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are special-cased in fbm_instr(). If FBMcf_TAIL, the table is created as if the string has a trailing \n. */ /* =head1 Miscellaneous Functions =for apidoc fbm_compile Analyses the string in order to make fast searches on it using fbm_instr() -- the Boyer-Moore algorithm. =cut */ void Perl_fbm_compile(pTHX_ SV *sv, U32 flags) { register U8 *s; register U8 *table; register U32 i; STRLEN len; I32 rarest = 0; U32 frequency = 256; if (flags & FBMcf_TAIL) { MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL; sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */ if (mg && mg->mg_len >= 0) mg->mg_len++; } s = (U8*)SvPV_force(sv, len); (void)SvUPGRADE(sv, SVt_PVBM); if (len == 0) /* TAIL might be on a zero-length string. */ return; if (len > 2) { U8 mlen; unsigned char *sb; if (len > 255) mlen = 255; else mlen = (U8)len; Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET); table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET); s = table - 1 - FBM_TABLE_OFFSET; /* last char */ memset((void*)table, mlen, 256); table[-1] = (U8)flags; i = 0; sb = s - mlen + 1; /* first char (maybe) */ while (s >= sb) { if (table[*s] == mlen) table[*s] = (U8)i; s--, i++; } } sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */ SvVALID_on(sv); s = (unsigned char*)(SvPVX(sv)); /* deeper magic */ for (i = 0; i < len; i++) { if (PL_freq[s[i]] < frequency) { rarest = i; frequency = PL_freq[s[i]]; } } BmRARE(sv) = s[rarest]; BmPREVIOUS(sv) = (U16)rarest; BmUSEFUL(sv) = 100; /* Initial value */ if (flags & FBMcf_TAIL) SvTAIL_on(sv); DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n", BmRARE(sv),BmPREVIOUS(sv))); } /* If SvTAIL(littlestr), it has a fake '\n' at end. */ /* If SvTAIL is actually due to \Z or \z, this gives false positives if multiline */ /* =for apidoc fbm_instr Returns the location of the SV in the string delimited by C and C. It returns C if the string can't be found. The C does not have to be fbm_compiled, but the search will not be as fast then. =cut */ char * Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags) { register unsigned char *s; STRLEN l; register unsigned char *little = (unsigned char *)SvPV(littlestr,l); register STRLEN littlelen = l; register I32 multiline = flags & FBMrf_MULTILINE; if ((STRLEN)(bigend - big) < littlelen) { if ( SvTAIL(littlestr) && ((STRLEN)(bigend - big) == littlelen - 1) && (littlelen == 1 || (*big == *little && memEQ((char *)big, (char *)little, littlelen - 1)))) return (char*)big; return Nullch; } if (littlelen <= 2) { /* Special-cased */ if (littlelen == 1) { if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */ /* Know that bigend != big. */ if (bigend[-1] == '\n') return (char *)(bigend - 1); return (char *) bigend; } s = big; while (s < bigend) { if (*s == *little) return (char *)s; s++; } if (SvTAIL(littlestr)) return (char *) bigend; return Nullch; } if (!littlelen) return (char*)big; /* Cannot be SvTAIL! */ /* littlelen is 2 */ if (SvTAIL(littlestr) && !multiline) { if (bigend[-1] == '\n' && bigend[-2] == *little) return (char*)bigend - 2; if (bigend[-1] == *little) return (char*)bigend - 1; return Nullch; } { /* This should be better than FBM if c1 == c2, and almost as good otherwise: maybe better since we do less indirection. And we save a lot of memory by caching no table. */ register unsigned char c1 = little[0]; register unsigned char c2 = little[1]; s = big + 1; bigend--; if (c1 != c2) { while (s <= bigend) { if (s[0] == c2) { if (s[-1] == c1) return (char*)s - 1; s += 2; continue; } next_chars: if (s[0] == c1) { if (s == bigend) goto check_1char_anchor; if (s[1] == c2) return (char*)s; else { s++; goto next_chars; } } else s += 2; } goto check_1char_anchor; } /* Now c1 == c2 */ while (s <= bigend) { if (s[0] == c1) { if (s[-1] == c1) return (char*)s - 1; if (s == bigend) goto check_1char_anchor; if (s[1] == c1) return (char*)s; s += 3; } else s += 2; } } check_1char_anchor: /* One char and anchor! */ if (SvTAIL(littlestr) && (*bigend == *little)) return (char *)bigend; /* bigend is already decremented. */ return Nullch; } if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */ s = bigend - littlelen; if (s >= big && bigend[-1] == '\n' && *s == *little /* Automatically of length > 2 */ && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) { return (char*)s; /* how sweet it is */ } if (s[1] == *little && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2)) { return (char*)s + 1; /* how sweet it is */ } return Nullch; } if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) { char *b = ninstr((char*)big,(char*)bigend, (char*)little, (char*)little + littlelen); if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */ /* Chop \n from littlestr: */ s = bigend - littlelen + 1; if (*s == *little && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) { return (char*)s; } return Nullch; } return b; } { /* Do actual FBM. */ register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET; register unsigned char *oldlittle; if (littlelen > (STRLEN)(bigend - big)) return Nullch; --littlelen; /* Last char found by table lookup */ s = big + littlelen; little += littlelen; /* last char */ oldlittle = little; if (s < bigend) { register I32 tmp; top2: /*SUPPRESS 560*/ if ((tmp = table[*s])) { if ((s += tmp) < bigend) goto top2; goto check_end; } else { /* less expensive than calling strncmp() */ register unsigned char *olds = s; tmp = littlelen; while (tmp--) { if (*--s == *--little) continue; s = olds + 1; /* here we pay the price for failure */ little = oldlittle; if (s < bigend) /* fake up continue to outer loop */ goto top2; goto check_end; } return (char *)s; } } check_end: if ( s == bigend && (table[-1] & FBMcf_TAIL) && memEQ((char *)(bigend - littlelen), (char *)(oldlittle - littlelen), littlelen) ) return (char*)bigend - littlelen; return Nullch; } } /* start_shift, end_shift are positive quantities which give offsets of ends of some substring of bigstr. If `last' we want the last occurrence. old_posp is the way of communication between consequent calls if the next call needs to find the . The initial *old_posp should be -1. Note that we take into account SvTAIL, so one can get extra optimizations if _ALL flag is set. */ /* If SvTAIL is actually due to \Z or \z, this gives false positives if PL_multiline. In fact if !PL_multiline the authoritative answer is not supported yet. */ char * Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last) { register unsigned char *s, *x; register unsigned char *big; register I32 pos; register I32 previous; register I32 first; register unsigned char *little; register I32 stop_pos; register unsigned char *littleend; I32 found = 0; if (*old_posp == -1 ? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0 : (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) { cant_find: if ( BmRARE(littlestr) == '\n' && BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) { little = (unsigned char *)(SvPVX(littlestr)); littleend = little + SvCUR(littlestr); first = *little++; goto check_tail; } return Nullch; } little = (unsigned char *)(SvPVX(littlestr)); littleend = little + SvCUR(littlestr); first = *little++; /* The value of pos we can start at: */ previous = BmPREVIOUS(littlestr); big = (unsigned char *)(SvPVX(bigstr)); /* The value of pos we can stop at: */ stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous); if (previous + start_shift > stop_pos) { /* stop_pos does not include SvTAIL in the count, so this check is incorrect (I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19 */ #if 0 if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */ goto check_tail; #endif return Nullch; } while (pos < previous + start_shift) { if (!(pos += PL_screamnext[pos])) goto cant_find; } big -= previous; do { if (pos >= stop_pos) break; if (big[pos] != first) continue; for (x=big+pos+1,s=little; s < littleend; /**/ ) { if (*s++ != *x++) { s--; break; } } if (s == littleend) { *old_posp = pos; if (!last) return (char *)(big+pos); found = 1; } } while ( pos += PL_screamnext[pos] ); if (last && found) return (char *)(big+(*old_posp)); check_tail: if (!SvTAIL(littlestr) || (end_shift > 0)) return Nullch; /* Ignore the trailing "\n". This code is not microoptimized */ big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr)); stop_pos = littleend - little; /* Actual littlestr len */ if (stop_pos == 0) return (char*)big; big -= stop_pos; if (*big == first && ((stop_pos == 1) || memEQ((char *)(big + 1), (char *)little, stop_pos - 1))) return (char*)big; return Nullch; } I32 Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len) { register U8 *a = (U8 *)s1; register U8 *b = (U8 *)s2; while (len--) { if (*a != *b && *a != PL_fold[*b]) return 1; a++,b++; } return 0; } I32 Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len) { register U8 *a = (U8 *)s1; register U8 *b = (U8 *)s2; while (len--) { if (*a != *b && *a != PL_fold_locale[*b]) return 1; a++,b++; } return 0; } /* copy a string to a safe spot */ /* =head1 Memory Management =for apidoc savepv Perl's version of C. Returns a pointer to a newly allocated string which is a duplicate of C. The size of the string is determined by C. The memory allocated for the new string can be freed with the C function. =cut */ char * Perl_savepv(pTHX_ const char *pv) { register char *newaddr; if (!pv) return Nullch; New(902,newaddr,strlen(pv)+1,char); return strcpy(newaddr,pv); } /* same thing but with a known length */ /* =for apidoc savepvn Perl's version of what C would be if it existed. Returns a pointer to a newly allocated string which is a duplicate of the first C bytes from C. The memory allocated for the new string can be freed with the C function. =cut */ char * Perl_savepvn(pTHX_ const char *pv, register I32 len) { register char *newaddr; New(903,newaddr,len+1,char); /* Give a meaning to NULL pointer mainly for the use in sv_magic() */ if (pv) { /* might not be null terminated */ newaddr[len] = '\0'; return CopyD(pv,newaddr,len,char); } else { return ZeroD(newaddr,len+1,char); } } /* =for apidoc savesharedpv A version of C which allocates the duplicate string in memory which is shared between threads. =cut */ char * Perl_savesharedpv(pTHX_ const char *pv) { register char *newaddr; if (!pv) return Nullch; newaddr = (char*)PerlMemShared_malloc(strlen(pv)+1); if (!newaddr) { PerlLIO_write(PerlIO_fileno(Perl_error_log), PL_no_mem, strlen(PL_no_mem)); my_exit(1); } return strcpy(newaddr,pv); } /* =for apidoc savesvpv A version of C/C which gets the string to duplicate from the passed in SV using C =cut */ char * Perl_savesvpv(pTHX_ SV *sv) { STRLEN len; const char *pv = SvPV(sv, len); register char *newaddr; New(903,newaddr,++len,char); return CopyD(pv,newaddr,len,char); } /* the SV for Perl_form() and mess() is not kept in an arena */ STATIC SV * S_mess_alloc(pTHX) { SV *sv; XPVMG *any; if (!PL_dirty) return sv_2mortal(newSVpvn("",0)); if (PL_mess_sv) return PL_mess_sv; /* Create as PVMG now, to avoid any upgrading later */ New(905, sv, 1, SV); Newz(905, any, 1, XPVMG); SvFLAGS(sv) = SVt_PVMG; SvANY(sv) = (void*)any; SvREFCNT(sv) = 1 << 30; /* practically infinite */ PL_mess_sv = sv; return sv; } #if defined(PERL_IMPLICIT_CONTEXT) char * Perl_form_nocontext(const char* pat, ...) { dTHX; char *retval; va_list args; va_start(args, pat); retval = vform(pat, &args); va_end(args); return retval; } #endif /* PERL_IMPLICIT_CONTEXT */ /* =head1 Miscellaneous Functions =for apidoc form Takes a sprintf-style format pattern and conventional (non-SV) arguments and returns the formatted string. (char *) Perl_form(pTHX_ const char* pat, ...) can be used any place a string (char *) is required: char * s = Perl_form("%d.%d",major,minor); Uses a single private buffer so if you want to format several strings you must explicitly copy the earlier strings away (and free the copies when you are done). =cut */ char * Perl_form(pTHX_ const char* pat, ...) { char *retval; va_list args; va_start(args, pat); retval = vform(pat, &args); va_end(args); return retval; } char * Perl_vform(pTHX_ const char *pat, va_list *args) { SV *sv = mess_alloc(); sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*)); return SvPVX(sv); } #if defined(PERL_IMPLICIT_CONTEXT) SV * Perl_mess_nocontext(const char *pat, ...) { dTHX; SV *retval; va_list args; va_start(args, pat); retval = vmess(pat, &args); va_end(args); return retval; } #endif /* PERL_IMPLICIT_CONTEXT */ SV * Perl_mess(pTHX_ const char *pat, ...) { SV *retval; va_list args; va_start(args, pat); retval = vmess(pat, &args); va_end(args); return retval; } STATIC COP* S_closest_cop(pTHX_ COP *cop, OP *o) { /* Look for PL_op starting from o. cop is the last COP we've seen. */ if (!o || o == PL_op) return cop; if (o->op_flags & OPf_KIDS) { OP *kid; for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) { COP *new_cop; /* If the OP_NEXTSTATE has been optimised away we can still use it * the get the file and line number. */ if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE) cop = (COP *)kid; /* Keep searching, and return when we've found something. */ new_cop = closest_cop(cop, kid); if (new_cop) return new_cop; } } /* Nothing found. */ return 0; } SV * Perl_vmess(pTHX_ const char *pat, va_list *args) { SV *sv = mess_alloc(); static char dgd[] = " during global destruction.\n"; COP *cop; sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*)); if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') { /* * Try and find the file and line for PL_op. This will usually be * PL_curcop, but it might be a cop that has been optimised away. We * can try to find such a cop by searching through the optree starting * from the sibling of PL_curcop. */ cop = closest_cop(PL_curcop, PL_curcop->op_sibling); if (!cop) cop = PL_curcop; if (CopLINE(cop)) Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf, OutCopFILE(cop), (IV)CopLINE(cop)); if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) { bool line_mode = (RsSIMPLE(PL_rs) && SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n'); Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf, PL_last_in_gv == PL_argvgv ? "" : GvNAME(PL_last_in_gv), line_mode ? "line" : "chunk", (IV)IoLINES(GvIOp(PL_last_in_gv))); } sv_catpv(sv, PL_dirty ? dgd : ".\n"); } return sv; } void Perl_write_to_stderr(pTHX_ const char* message, int msglen) { IO *io; MAGIC *mg; if (PL_stderrgv && SvREFCNT(PL_stderrgv) && (io = GvIO(PL_stderrgv)) && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) { dSP; ENTER; SAVETMPS; save_re_context(); SAVESPTR(PL_stderrgv); PL_stderrgv = Nullgv; PUSHSTACKi(PERLSI_MAGIC); PUSHMARK(SP); EXTEND(SP,2); PUSHs(SvTIED_obj((SV*)io, mg)); PUSHs(sv_2mortal(newSVpvn(message, msglen))); PUTBACK; call_method("PRINT", G_SCALAR); POPSTACK; FREETMPS; LEAVE; } else { #ifdef USE_SFIO /* SFIO can really mess with your errno */ int e = errno; #endif PerlIO *serr = Perl_error_log; PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen); (void)PerlIO_flush(serr); #ifdef USE_SFIO errno = e; #endif } } /* Common code used by vcroak, vdie and vwarner */ void S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8); char * S_vdie_croak_common(pTHX_ const char* pat, va_list* args, STRLEN* msglen, I32* utf8) { char *message; if (pat) { SV *msv = vmess(pat, args); if (PL_errors && SvCUR(PL_errors)) { sv_catsv(PL_errors, msv); message = SvPV(PL_errors, *msglen); SvCUR_set(PL_errors, 0); } else message = SvPV(msv,*msglen); *utf8 = SvUTF8(msv); } else { message = Nullch; } DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: die/croak: message = %s\ndiehook = %p\n", thr, message, PL_diehook)); if (PL_diehook) { S_vdie_common(aTHX_ message, *msglen, *utf8); } return message; } void S_vdie_common(pTHX_ const char *message, STRLEN msglen, I32 utf8) { HV *stash; GV *gv; CV *cv; /* sv_2cv might call Perl_croak() */ SV *olddiehook = PL_diehook; assert(PL_diehook); ENTER; SAVESPTR(PL_diehook); PL_diehook = Nullsv; cv = sv_2cv(olddiehook, &stash, &gv, 0); LEAVE; if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) { dSP; SV *msg; ENTER; save_re_context(); if (message) { msg = newSVpvn(message, msglen); SvFLAGS(msg) |= utf8; SvREADONLY_on(msg); SAVEFREESV(msg); } else { msg = ERRSV; } PUSHSTACKi(PERLSI_DIEHOOK); PUSHMARK(SP); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; } } OP * Perl_vdie(pTHX_ const char* pat, va_list *args) { char *message; int was_in_eval = PL_in_eval; STRLEN msglen; I32 utf8 = 0; DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: die: curstack = %p, mainstack = %p\n", thr, PL_curstack, PL_mainstack)); message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8); PL_restartop = die_where(message, msglen); SvFLAGS(ERRSV) |= utf8; DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n", thr, PL_restartop, was_in_eval, PL_top_env)); if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev) JMPENV_JUMP(3); return PL_restartop; } #if defined(PERL_IMPLICIT_CONTEXT) OP * Perl_die_nocontext(const char* pat, ...) { dTHX; OP *o; va_list args; va_start(args, pat); o = vdie(pat, &args); va_end(args); return o; } #endif /* PERL_IMPLICIT_CONTEXT */ OP * Perl_die(pTHX_ const char* pat, ...) { OP *o; va_list args; va_start(args, pat); o = vdie(pat, &args); va_end(args); return o; } void Perl_vcroak(pTHX_ const char* pat, va_list *args) { char *message; STRLEN msglen; I32 utf8 = 0; message = S_vdie_croak_common(aTHX_ pat, args, &msglen, &utf8); if (PL_in_eval) { PL_restartop = die_where(message, msglen); SvFLAGS(ERRSV) |= utf8; JMPENV_JUMP(3); } else if (!message) message = SvPVx(ERRSV, msglen); write_to_stderr(message, msglen); my_failure_exit(); } #if defined(PERL_IMPLICIT_CONTEXT) void Perl_croak_nocontext(const char *pat, ...) { dTHX; va_list args; va_start(args, pat); vcroak(pat, &args); /* NOTREACHED */ va_end(args); } #endif /* PERL_IMPLICIT_CONTEXT */ /* =head1 Warning and Dieing =for apidoc croak This is the XSUB-writer's interface to Perl's C function. Normally call this function the same way you call the C C function. Calling C returns control directly to Perl, sidestepping the normal C order of execution. See C. If you want to throw an exception object, assign the object to C<$@> and then pass C to croak(): errsv = get_sv("@", TRUE); sv_setsv(errsv, exception_object); croak(Nullch); =cut */ void Perl_croak(pTHX_ const char *pat, ...) { va_list args; va_start(args, pat); vcroak(pat, &args); /* NOTREACHED */ va_end(args); } void Perl_vwarn(pTHX_ const char* pat, va_list *args) { char *message; HV *stash; GV *gv; CV *cv; SV *msv; STRLEN msglen; I32 utf8 = 0; msv = vmess(pat, args); utf8 = SvUTF8(msv); message = SvPV(msv, msglen); if (PL_warnhook) { /* sv_2cv might call Perl_warn() */ SV *oldwarnhook = PL_warnhook; ENTER; SAVESPTR(PL_warnhook); PL_warnhook = Nullsv; cv = sv_2cv(oldwarnhook, &stash, &gv, 0); LEAVE; if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) { dSP; SV *msg; ENTER; save_re_context(); msg = newSVpvn(message, msglen); SvFLAGS(msg) |= utf8; SvREADONLY_on(msg); SAVEFREESV(msg); PUSHSTACKi(PERLSI_WARNHOOK); PUSHMARK(SP); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; return; } } write_to_stderr(message, msglen); } #if defined(PERL_IMPLICIT_CONTEXT) void Perl_warn_nocontext(const char *pat, ...) { dTHX; va_list args; va_start(args, pat); vwarn(pat, &args); va_end(args); } #endif /* PERL_IMPLICIT_CONTEXT */ /* =for apidoc warn This is the XSUB-writer's interface to Perl's C function. Call this function the same way you call the C C function. See C. =cut */ void Perl_warn(pTHX_ const char *pat, ...) { va_list args; va_start(args, pat); vwarn(pat, &args); va_end(args); } #if defined(PERL_IMPLICIT_CONTEXT) void Perl_warner_nocontext(U32 err, const char *pat, ...) { dTHX; va_list args; va_start(args, pat); vwarner(err, pat, &args); va_end(args); } #endif /* PERL_IMPLICIT_CONTEXT */ void Perl_warner(pTHX_ U32 err, const char* pat,...) { va_list args; va_start(args, pat); vwarner(err, pat, &args); va_end(args); } void Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args) { if (ckDEAD(err)) { SV *msv = vmess(pat, args); STRLEN msglen; char *message = SvPV(msv, msglen); I32 utf8 = SvUTF8(msv); if (PL_diehook) { assert(message); S_vdie_common(aTHX_ message, msglen, utf8); } if (PL_in_eval) { PL_restartop = die_where(message, msglen); SvFLAGS(ERRSV) |= utf8; JMPENV_JUMP(3); } write_to_stderr(message, msglen); my_failure_exit(); } else { Perl_vwarn(aTHX_ pat, args); } } /* since we've already done strlen() for both nam and val * we can use that info to make things faster than * sprintf(s, "%s=%s", nam, val) */ #define my_setenv_format(s, nam, nlen, val, vlen) \ Copy(nam, s, nlen, char); \ *(s+nlen) = '='; \ Copy(val, s+(nlen+1), vlen, char); \ *(s+(nlen+1+vlen)) = '\0' #ifdef USE_ENVIRON_ARRAY /* VMS' my_setenv() is in vms.c */ #if !defined(WIN32) && !defined(NETWARE) void Perl_my_setenv(pTHX_ char *nam, char *val) { #ifdef USE_ITHREADS /* only parent thread can modify process environment */ if (PL_curinterp == aTHX) #endif { #ifndef PERL_USE_SAFE_PUTENV if (!PL_use_safe_putenv) { /* most putenv()s leak, so we manipulate environ directly */ register I32 i=setenv_getix(nam); /* where does it go? */ int nlen, vlen; if (environ == PL_origenviron) { /* need we copy environment? */ I32 j; I32 max; char **tmpenv; /*SUPPRESS 530*/ for (max = i; environ[max]; max++) ; tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*)); for (j=0; j= 0; i++) ; return i ? 0 : -1; } #endif /* this is a drop-in replacement for bcopy() */ #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY)) char * Perl_my_bcopy(register const char *from,register char *to,register I32 len) { char *retval = to; if (from - to >= 0) { while (len--) *to++ = *from++; } else { to += len; from += len; while (len--) *(--to) = *(--from); } return retval; } #endif /* this is a drop-in replacement for memset() */ #ifndef HAS_MEMSET void * Perl_my_memset(register char *loc, register I32 ch, register I32 len) { char *retval = loc; while (len--) *loc++ = ch; return retval; } #endif /* this is a drop-in replacement for bzero() */ #if !defined(HAS_BZERO) && !defined(HAS_MEMSET) char * Perl_my_bzero(register char *loc, register I32 len) { char *retval = loc; while (len--) *loc++ = 0; return retval; } #endif /* this is a drop-in replacement for memcmp() */ #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP) I32 Perl_my_memcmp(const char *s1, const char *s2, register I32 len) { register U8 *a = (U8 *)s1; register U8 *b = (U8 *)s2; register I32 tmp; while (len--) { if (tmp = *a++ - *b++) return tmp; } return 0; } #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */ #ifndef HAS_VPRINTF #ifdef USE_CHAR_VSPRINTF char * #else int #endif vsprintf(char *dest, const char *pat, char *args) { FILE fakebuf; fakebuf._ptr = dest; fakebuf._cnt = 32767; #ifndef _IOSTRG #define _IOSTRG 0 #endif fakebuf._flag = _IOWRT|_IOSTRG; _doprnt(pat, args, &fakebuf); /* what a kludge */ (void)putc('\0', &fakebuf); #ifdef USE_CHAR_VSPRINTF return(dest); #else return 0; /* perl doesn't use return value */ #endif } #endif /* HAS_VPRINTF */ #ifdef MYSWAP #if BYTEORDER != 0x4321 short Perl_my_swap(pTHX_ short s) { #if (BYTEORDER & 1) == 0 short result; result = ((s & 255) << 8) + ((s >> 8) & 255); return result; #else return s; #endif } long Perl_my_htonl(pTHX_ long l) { union { long result; char c[sizeof(long)]; } u; #if BYTEORDER == 0x1234 u.c[0] = (l >> 24) & 255; u.c[1] = (l >> 16) & 255; u.c[2] = (l >> 8) & 255; u.c[3] = l & 255; return u.result; #else #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) Perl_croak(aTHX_ "Unknown BYTEORDER\n"); #else register I32 o; register I32 s; for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { u.c[o & 0xf] = (l >> s) & 255; } return u.result; #endif #endif } long Perl_my_ntohl(pTHX_ long l) { union { long l; char c[sizeof(long)]; } u; #if BYTEORDER == 0x1234 u.c[0] = (l >> 24) & 255; u.c[1] = (l >> 16) & 255; u.c[2] = (l >> 8) & 255; u.c[3] = l & 255; return u.l; #else #if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf) Perl_croak(aTHX_ "Unknown BYTEORDER\n"); #else register I32 o; register I32 s; u.l = l; l = 0; for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) { l |= (u.c[o & 0xf] & 255) << s; } return l; #endif #endif } #endif /* BYTEORDER != 0x4321 */ #endif /* MYSWAP */ /* * Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'. * If these functions are defined, * the BYTEORDER is neither 0x1234 nor 0x4321. * However, this is not assumed. * -DWS */ #define HTOLE(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s = 0; \ for (i = 0; i < sizeof(u.c); i++, s += 8) { \ u.c[i] = (n >> s) & 0xFF; \ } \ return u.value; \ } #define LETOH(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s = 0; \ u.value = n; \ n = 0; \ for (i = 0; i < sizeof(u.c); i++, s += 8) { \ n |= ((type)(u.c[i] & 0xFF)) << s; \ } \ return n; \ } /* * Big-endian byte order functions. */ #define HTOBE(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s = 8*(sizeof(u.c)-1); \ for (i = 0; i < sizeof(u.c); i++, s -= 8) { \ u.c[i] = (n >> s) & 0xFF; \ } \ return u.value; \ } #define BETOH(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s = 8*(sizeof(u.c)-1); \ u.value = n; \ n = 0; \ for (i = 0; i < sizeof(u.c); i++, s -= 8) { \ n |= ((type)(u.c[i] & 0xFF)) << s; \ } \ return n; \ } /* * If we just can't do it... */ #define NOT_AVAIL(name,type) \ type \ name (register type n) \ { \ Perl_croak_nocontext(#name "() not available"); \ return n; /* not reached */ \ } #if defined(HAS_HTOVS) && !defined(htovs) HTOLE(htovs,short) #endif #if defined(HAS_HTOVL) && !defined(htovl) HTOLE(htovl,long) #endif #if defined(HAS_VTOHS) && !defined(vtohs) LETOH(vtohs,short) #endif #if defined(HAS_VTOHL) && !defined(vtohl) LETOH(vtohl,long) #endif #ifdef PERL_NEED_MY_HTOLE16 # if U16SIZE == 2 HTOLE(Perl_my_htole16,U16) # else NOT_AVAIL(Perl_my_htole16,U16) # endif #endif #ifdef PERL_NEED_MY_LETOH16 # if U16SIZE == 2 LETOH(Perl_my_letoh16,U16) # else NOT_AVAIL(Perl_my_letoh16,U16) # endif #endif #ifdef PERL_NEED_MY_HTOBE16 # if U16SIZE == 2 HTOBE(Perl_my_htobe16,U16) # else NOT_AVAIL(Perl_my_htobe16,U16) # endif #endif #ifdef PERL_NEED_MY_BETOH16 # if U16SIZE == 2 BETOH(Perl_my_betoh16,U16) # else NOT_AVAIL(Perl_my_betoh16,U16) # endif #endif #ifdef PERL_NEED_MY_HTOLE32 # if U32SIZE == 4 HTOLE(Perl_my_htole32,U32) # else NOT_AVAIL(Perl_my_htole32,U32) # endif #endif #ifdef PERL_NEED_MY_LETOH32 # if U32SIZE == 4 LETOH(Perl_my_letoh32,U32) # else NOT_AVAIL(Perl_my_letoh32,U32) # endif #endif #ifdef PERL_NEED_MY_HTOBE32 # if U32SIZE == 4 HTOBE(Perl_my_htobe32,U32) # else NOT_AVAIL(Perl_my_htobe32,U32) # endif #endif #ifdef PERL_NEED_MY_BETOH32 # if U32SIZE == 4 BETOH(Perl_my_betoh32,U32) # else NOT_AVAIL(Perl_my_betoh32,U32) # endif #endif #ifdef PERL_NEED_MY_HTOLE64 # if U64SIZE == 8 HTOLE(Perl_my_htole64,U64) # else NOT_AVAIL(Perl_my_htole64,U64) # endif #endif #ifdef PERL_NEED_MY_LETOH64 # if U64SIZE == 8 LETOH(Perl_my_letoh64,U64) # else NOT_AVAIL(Perl_my_letoh64,U64) # endif #endif #ifdef PERL_NEED_MY_HTOBE64 # if U64SIZE == 8 HTOBE(Perl_my_htobe64,U64) # else NOT_AVAIL(Perl_my_htobe64,U64) # endif #endif #ifdef PERL_NEED_MY_BETOH64 # if U64SIZE == 8 BETOH(Perl_my_betoh64,U64) # else NOT_AVAIL(Perl_my_betoh64,U64) # endif #endif #ifdef PERL_NEED_MY_HTOLES HTOLE(Perl_my_htoles,short) #endif #ifdef PERL_NEED_MY_LETOHS LETOH(Perl_my_letohs,short) #endif #ifdef PERL_NEED_MY_HTOBES HTOBE(Perl_my_htobes,short) #endif #ifdef PERL_NEED_MY_BETOHS BETOH(Perl_my_betohs,short) #endif #ifdef PERL_NEED_MY_HTOLEI HTOLE(Perl_my_htolei,int) #endif #ifdef PERL_NEED_MY_LETOHI LETOH(Perl_my_letohi,int) #endif #ifdef PERL_NEED_MY_HTOBEI HTOBE(Perl_my_htobei,int) #endif #ifdef PERL_NEED_MY_BETOHI BETOH(Perl_my_betohi,int) #endif #ifdef PERL_NEED_MY_HTOLEL HTOLE(Perl_my_htolel,long) #endif #ifdef PERL_NEED_MY_LETOHL LETOH(Perl_my_letohl,long) #endif #ifdef PERL_NEED_MY_HTOBEL HTOBE(Perl_my_htobel,long) #endif #ifdef PERL_NEED_MY_BETOHL BETOH(Perl_my_betohl,long) #endif void Perl_my_swabn(void *ptr, int n) { register char *s = (char *)ptr; register char *e = s + (n-1); register char tc; for (n /= 2; n > 0; s++, e--, n--) { tc = *s; *s = *e; *e = tc; } } PerlIO * Perl_my_popen_list(pTHX_ char *mode, int n, SV **args) { #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE) int p[2]; register I32 This, that; register Pid_t pid; SV *sv; I32 did_pipes = 0; int pp[2]; PERL_FLUSHALL_FOR_CHILD; This = (*mode == 'w'); that = !This; if (PL_tainting) { taint_env(); taint_proper("Insecure %s%s", "EXEC"); } if (PerlProc_pipe(p) < 0) return Nullfp; /* Try for another pipe pair for error return */ if (PerlProc_pipe(pp) >= 0) did_pipes = 1; while ((pid = PerlProc_fork()) < 0) { if (errno != EAGAIN) { PerlLIO_close(p[This]); PerlLIO_close(p[that]); if (did_pipes) { PerlLIO_close(pp[0]); PerlLIO_close(pp[1]); } return Nullfp; } sleep(5); } if (pid == 0) { /* Child */ #undef THIS #undef THAT #define THIS that #define THAT This /* Close parent's end of error status pipe (if any) */ if (did_pipes) { PerlLIO_close(pp[0]); #if defined(HAS_FCNTL) && defined(F_SETFD) /* Close error pipe automatically if exec works */ fcntl(pp[1], F_SETFD, FD_CLOEXEC); #endif } /* Now dup our end of _the_ pipe to right position */ if (p[THIS] != (*mode == 'r')) { PerlLIO_dup2(p[THIS], *mode == 'r'); PerlLIO_close(p[THIS]); if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ } else PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ #if !defined(HAS_FCNTL) || !defined(F_SETFD) /* No automatic close - do it by hand */ # ifndef NOFILE # define NOFILE 20 # endif { int fd; for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) { if (fd != pp[1]) PerlLIO_close(fd); } } #endif do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes); PerlProc__exit(1); #undef THIS #undef THAT } /* Parent */ do_execfree(); /* free any memory malloced by child on fork */ if (did_pipes) PerlLIO_close(pp[1]); /* Keep the lower of the two fd numbers */ if (p[that] < p[This]) { PerlLIO_dup2(p[This], p[that]); PerlLIO_close(p[This]); p[This] = p[that]; } else PerlLIO_close(p[that]); /* close child's end of pipe */ LOCK_FDPID_MUTEX; sv = *av_fetch(PL_fdpid,p[This],TRUE); UNLOCK_FDPID_MUTEX; (void)SvUPGRADE(sv,SVt_IV); SvIVX(sv) = pid; PL_forkprocess = pid; /* If we managed to get status pipe check for exec fail */ if (did_pipes && pid > 0) { int errkid; int n = 0, n1; while (n < sizeof(int)) { n1 = PerlLIO_read(pp[0], (void*)(((char*)&errkid)+n), (sizeof(int)) - n); if (n1 <= 0) break; n += n1; } PerlLIO_close(pp[0]); did_pipes = 0; if (n) { /* Error */ int pid2, status; PerlLIO_close(p[This]); if (n != sizeof(int)) Perl_croak(aTHX_ "panic: kid popen errno read"); do { pid2 = wait4pid(pid, &status, 0); } while (pid2 == -1 && errno == EINTR); errno = errkid; /* Propagate errno from kid */ return Nullfp; } } if (did_pipes) PerlLIO_close(pp[0]); return PerlIO_fdopen(p[This], mode); #else Perl_croak(aTHX_ "List form of piped open not implemented"); return (PerlIO *) NULL; #endif } /* VMS' my_popen() is in VMS.c, same with OS/2. */ #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) PerlIO * Perl_my_popen(pTHX_ char *cmd, char *mode) { int p[2]; register I32 This, that; register Pid_t pid; SV *sv; I32 doexec = !(*cmd == '-' && cmd[1] == '\0'); I32 did_pipes = 0; int pp[2]; PERL_FLUSHALL_FOR_CHILD; #ifdef OS2 if (doexec) { return my_syspopen(aTHX_ cmd,mode); } #endif This = (*mode == 'w'); that = !This; if (doexec && PL_tainting) { taint_env(); taint_proper("Insecure %s%s", "EXEC"); } if (PerlProc_pipe(p) < 0) return Nullfp; if (doexec && PerlProc_pipe(pp) >= 0) did_pipes = 1; while ((pid = PerlProc_fork()) < 0) { if (errno != EAGAIN) { PerlLIO_close(p[This]); PerlLIO_close(p[that]); if (did_pipes) { PerlLIO_close(pp[0]); PerlLIO_close(pp[1]); } if (!doexec) Perl_croak(aTHX_ "Can't fork"); return Nullfp; } sleep(5); } if (pid == 0) { GV* tmpgv; #undef THIS #undef THAT #define THIS that #define THAT This if (did_pipes) { PerlLIO_close(pp[0]); #if defined(HAS_FCNTL) && defined(F_SETFD) fcntl(pp[1], F_SETFD, FD_CLOEXEC); #endif } if (p[THIS] != (*mode == 'r')) { PerlLIO_dup2(p[THIS], *mode == 'r'); PerlLIO_close(p[THIS]); if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ PerlLIO_close(p[THAT]); } else PerlLIO_close(p[THAT]); #ifndef OS2 if (doexec) { #if !defined(HAS_FCNTL) || !defined(F_SETFD) int fd; #ifndef NOFILE #define NOFILE 20 #endif { int fd; for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) if (fd != pp[1]) PerlLIO_close(fd); } #endif /* may or may not use the shell */ do_exec3(cmd, pp[1], did_pipes); PerlProc__exit(1); } #endif /* defined OS2 */ /*SUPPRESS 560*/ if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) { SvREADONLY_off(GvSV(tmpgv)); sv_setiv(GvSV(tmpgv), PerlProc_getpid()); SvREADONLY_on(GvSV(tmpgv)); } #ifdef THREADS_HAVE_PIDS PL_ppid = (IV)getppid(); #endif PL_forkprocess = 0; hv_clear(PL_pidstatus); /* we have no children */ return Nullfp; #undef THIS #undef THAT } do_execfree(); /* free any memory malloced by child on vfork */ if (did_pipes) PerlLIO_close(pp[1]); if (p[that] < p[This]) { PerlLIO_dup2(p[This], p[that]); PerlLIO_close(p[This]); p[This] = p[that]; } else PerlLIO_close(p[that]); LOCK_FDPID_MUTEX; sv = *av_fetch(PL_fdpid,p[This],TRUE); UNLOCK_FDPID_MUTEX; (void)SvUPGRADE(sv,SVt_IV); SvIVX(sv) = pid; PL_forkprocess = pid; if (did_pipes && pid > 0) { int errkid; int n = 0, n1; while (n < sizeof(int)) { n1 = PerlLIO_read(pp[0], (void*)(((char*)&errkid)+n), (sizeof(int)) - n); if (n1 <= 0) break; n += n1; } PerlLIO_close(pp[0]); did_pipes = 0; if (n) { /* Error */ int pid2, status; PerlLIO_close(p[This]); if (n != sizeof(int)) Perl_croak(aTHX_ "panic: kid popen errno read"); do { pid2 = wait4pid(pid, &status, 0); } while (pid2 == -1 && errno == EINTR); errno = errkid; /* Propagate errno from kid */ return Nullfp; } } if (did_pipes) PerlLIO_close(pp[0]); return PerlIO_fdopen(p[This], mode); } #else #if defined(atarist) || defined(EPOC) FILE *popen(); PerlIO * Perl_my_popen(pTHX_ char *cmd, char *mode) { PERL_FLUSHALL_FOR_CHILD; /* Call system's popen() to get a FILE *, then import it. used 0 for 2nd parameter to PerlIO_importFILE; apparently not used */ return PerlIO_importFILE(popen(cmd, mode), 0); } #else #if defined(DJGPP) FILE *djgpp_popen(); PerlIO * Perl_my_popen(pTHX_ char *cmd, char *mode) { PERL_FLUSHALL_FOR_CHILD; /* Call system's popen() to get a FILE *, then import it. used 0 for 2nd parameter to PerlIO_importFILE; apparently not used */ return PerlIO_importFILE(djgpp_popen(cmd, mode), 0); } #endif #endif #endif /* !DOSISH */ /* this is called in parent before the fork() */ void Perl_atfork_lock(void) { #if defined(USE_ITHREADS) /* locks must be held in locking order (if any) */ # ifdef MYMALLOC MUTEX_LOCK(&PL_malloc_mutex); # endif OP_REFCNT_LOCK; #endif } /* this is called in both parent and child after the fork() */ void Perl_atfork_unlock(void) { #if defined(USE_ITHREADS) /* locks must be released in same order as in atfork_lock() */ # ifdef MYMALLOC MUTEX_UNLOCK(&PL_malloc_mutex); # endif OP_REFCNT_UNLOCK; #endif } Pid_t Perl_my_fork(void) { #if defined(HAS_FORK) Pid_t pid; #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK) atfork_lock(); pid = fork(); atfork_unlock(); #else /* atfork_lock() and atfork_unlock() are installed as pthread_atfork() * handlers elsewhere in the code */ pid = fork(); #endif return pid; #else /* this "canna happen" since nothing should be calling here if !HAS_FORK */ Perl_croak_nocontext("fork() not available"); return 0; #endif /* HAS_FORK */ } #ifdef DUMP_FDS void Perl_dump_fds(pTHX_ char *s) { int fd; Stat_t tmpstatbuf; PerlIO_printf(Perl_debug_log,"%s", s); for (fd = 0; fd < 32; fd++) { if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0) PerlIO_printf(Perl_debug_log," %d",fd); } PerlIO_printf(Perl_debug_log,"\n"); } #endif /* DUMP_FDS */ #ifndef HAS_DUP2 int dup2(int oldfd, int newfd) { #if defined(HAS_FCNTL) && defined(F_DUPFD) if (oldfd == newfd) return oldfd; PerlLIO_close(newfd); return fcntl(oldfd, F_DUPFD, newfd); #else #define DUP2_MAX_FDS 256 int fdtmp[DUP2_MAX_FDS]; I32 fdx = 0; int fd; if (oldfd == newfd) return oldfd; PerlLIO_close(newfd); /* good enough for low fd's... */ while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) { if (fdx >= DUP2_MAX_FDS) { PerlLIO_close(fd); fd = -1; break; } fdtmp[fdx++] = fd; } while (fdx > 0) PerlLIO_close(fdtmp[--fdx]); return fd; #endif } #endif #ifndef PERL_MICRO #ifdef HAS_SIGACTION #ifdef MACOS_TRADITIONAL /* We don't want restart behavior on MacOS */ #undef SA_RESTART #endif Sighandler_t Perl_rsignal(pTHX_ int signo, Sighandler_t handler) { struct sigaction act, oact; #ifdef USE_ITHREADS /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return SIG_ERR; #endif act.sa_handler = handler; sigemptyset(&act.sa_mask); act.sa_flags = 0; #ifdef SA_RESTART if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ #endif #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN) act.sa_flags |= SA_NOCLDWAIT; #endif if (sigaction(signo, &act, &oact) == -1) return SIG_ERR; else return oact.sa_handler; } Sighandler_t Perl_rsignal_state(pTHX_ int signo) { struct sigaction oact; if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1) return SIG_ERR; else return oact.sa_handler; } int Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) { struct sigaction act; #ifdef USE_ITHREADS /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return -1; #endif act.sa_handler = handler; sigemptyset(&act.sa_mask); act.sa_flags = 0; #ifdef SA_RESTART if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ #endif #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN) act.sa_flags |= SA_NOCLDWAIT; #endif return sigaction(signo, &act, save); } int Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) { #ifdef USE_ITHREADS /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return -1; #endif return sigaction(signo, save, (struct sigaction *)NULL); } #else /* !HAS_SIGACTION */ Sighandler_t Perl_rsignal(pTHX_ int signo, Sighandler_t handler) { #if defined(USE_ITHREADS) && !defined(WIN32) /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return SIG_ERR; #endif return PerlProc_signal(signo, handler); } static int sig_trapped; /* XXX signals are process-wide anyway, so we ignore the implications of this for threading */ static Signal_t sig_trap(int signo) { sig_trapped++; } Sighandler_t Perl_rsignal_state(pTHX_ int signo) { Sighandler_t oldsig; #if defined(USE_ITHREADS) && !defined(WIN32) /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return SIG_ERR; #endif sig_trapped = 0; oldsig = PerlProc_signal(signo, sig_trap); PerlProc_signal(signo, oldsig); if (sig_trapped) PerlProc_kill(PerlProc_getpid(), signo); return oldsig; } int Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) { #if defined(USE_ITHREADS) && !defined(WIN32) /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return -1; #endif *save = PerlProc_signal(signo, handler); return (*save == SIG_ERR) ? -1 : 0; } int Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) { #if defined(USE_ITHREADS) && !defined(WIN32) /* only "parent" interpreter can diddle signals */ if (PL_curinterp != aTHX) return -1; #endif return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0; } #endif /* !HAS_SIGACTION */ #endif /* !PERL_MICRO */ /* VMS' my_pclose() is in VMS.c; same with OS/2 */ #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) I32 Perl_my_pclose(pTHX_ PerlIO *ptr) { Sigsave_t hstat, istat, qstat; int status; SV **svp; Pid_t pid; Pid_t pid2; bool close_failed; int saved_errno = 0; #ifdef VMS int saved_vaxc_errno; #endif #ifdef WIN32 int saved_win32_errno; #endif LOCK_FDPID_MUTEX; svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE); UNLOCK_FDPID_MUTEX; pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1; SvREFCNT_dec(*svp); *svp = &PL_sv_undef; #ifdef OS2 if (pid == -1) { /* Opened by popen. */ return my_syspclose(ptr); } #endif if ((close_failed = (PerlIO_close(ptr) == EOF))) { saved_errno = errno; #ifdef VMS saved_vaxc_errno = vaxc$errno; #endif #ifdef WIN32 saved_win32_errno = GetLastError(); #endif } #ifdef UTS if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */ #endif #ifndef PERL_MICRO rsignal_save(SIGHUP, SIG_IGN, &hstat); rsignal_save(SIGINT, SIG_IGN, &istat); rsignal_save(SIGQUIT, SIG_IGN, &qstat); #endif do { pid2 = wait4pid(pid, &status, 0); } while (pid2 == -1 && errno == EINTR); #ifndef PERL_MICRO rsignal_restore(SIGHUP, &hstat); rsignal_restore(SIGINT, &istat); rsignal_restore(SIGQUIT, &qstat); #endif if (close_failed) { SETERRNO(saved_errno, saved_vaxc_errno); return -1; } return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status)); } #endif /* !DOSISH */ #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL) I32 Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags) { I32 result; if (!pid) return -1; #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME) { SV *sv; SV** svp; char spid[TYPE_CHARS(IV)]; if (pid > 0) { sprintf(spid, "%"IVdf, (IV)pid); svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE); if (svp && *svp != &PL_sv_undef) { *statusp = SvIVX(*svp); (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD); return pid; } } else { HE *entry; hv_iterinit(PL_pidstatus); if ((entry = hv_iternext(PL_pidstatus))) { pid = atoi(hv_iterkey(entry,(I32*)statusp)); sv = hv_iterval(PL_pidstatus,entry); *statusp = SvIVX(sv); sprintf(spid, "%"IVdf, (IV)pid); (void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD); return pid; } } } #endif #ifdef HAS_WAITPID # ifdef HAS_WAITPID_RUNTIME if (!HAS_WAITPID_RUNTIME) goto hard_way; # endif result = PerlProc_waitpid(pid,statusp,flags); goto finish; #endif #if !defined(HAS_WAITPID) && defined(HAS_WAIT4) result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *)); goto finish; #endif #if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME) hard_way: { if (flags) Perl_croak(aTHX_ "Can't do waitpid with flags"); else { while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0) pidgone(result,*statusp); if (result < 0) *statusp = -1; } } #endif finish: if (result < 0 && errno == EINTR) { PERL_ASYNC_CHECK(); } return result; } #endif /* !DOSISH || OS2 || WIN32 || NETWARE */ void /*SUPPRESS 590*/ Perl_pidgone(pTHX_ Pid_t pid, int status) { register SV *sv; char spid[TYPE_CHARS(IV)]; sprintf(spid, "%"IVdf, (IV)pid); sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE); (void)SvUPGRADE(sv,SVt_IV); SvIVX(sv) = status; return; } #if defined(atarist) || defined(OS2) || defined(EPOC) int pclose(); #ifdef HAS_FORK int /* Cannot prototype with I32 in os2ish.h. */ my_syspclose(PerlIO *ptr) #else I32 Perl_my_pclose(pTHX_ PerlIO *ptr) #endif { /* Needs work for PerlIO ! */ FILE *f = PerlIO_findFILE(ptr); I32 result = pclose(f); PerlIO_releaseFILE(ptr,f); return result; } #endif #if defined(DJGPP) int djgpp_pclose(); I32 Perl_my_pclose(pTHX_ PerlIO *ptr) { /* Needs work for PerlIO ! */ FILE *f = PerlIO_findFILE(ptr); I32 result = djgpp_pclose(f); result = (result << 8) & 0xff00; PerlIO_releaseFILE(ptr,f); return result; } #endif void Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count) { register I32 todo; register const char *frombase = from; if (len == 1) { register const char c = *from; while (count-- > 0) *to++ = c; return; } while (count-- > 0) { for (todo = len; todo > 0; todo--) { *to++ = *from++; } from = frombase; } } #ifndef HAS_RENAME I32 Perl_same_dirent(pTHX_ char *a, char *b) { char *fa = strrchr(a,'/'); char *fb = strrchr(b,'/'); Stat_t tmpstatbuf1; Stat_t tmpstatbuf2; SV *tmpsv = sv_newmortal(); if (fa) fa++; else fa = a; if (fb) fb++; else fb = b; if (strNE(a,b)) return FALSE; if (fa == a) sv_setpv(tmpsv, "."); else sv_setpvn(tmpsv, a, fa - a); if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0) return FALSE; if (fb == b) sv_setpv(tmpsv, "."); else sv_setpvn(tmpsv, b, fb - b); if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0) return FALSE; return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev && tmpstatbuf1.st_ino == tmpstatbuf2.st_ino; } #endif /* !HAS_RENAME */ char* Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags) { char *xfound = Nullch; char *xfailed = Nullch; char tmpbuf[MAXPATHLEN]; register char *s; I32 len = 0; int retval; #if defined(DOSISH) && !defined(OS2) && !defined(atarist) # define SEARCH_EXTS ".bat", ".cmd", NULL # define MAX_EXT_LEN 4 #endif #ifdef OS2 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL # define MAX_EXT_LEN 4 #endif #ifdef VMS # define SEARCH_EXTS ".pl", ".com", NULL # define MAX_EXT_LEN 4 #endif /* additional extensions to try in each dir if scriptname not found */ #ifdef SEARCH_EXTS char *exts[] = { SEARCH_EXTS }; char **ext = search_ext ? search_ext : exts; int extidx = 0, i = 0; char *curext = Nullch; #else # define MAX_EXT_LEN 0 #endif /* * If dosearch is true and if scriptname does not contain path * delimiters, search the PATH for scriptname. * * If SEARCH_EXTS is also defined, will look for each * scriptname{SEARCH_EXTS} whenever scriptname is not found * while searching the PATH. * * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search * proceeds as follows: * If DOSISH or VMSISH: * + look for ./scriptname{,.foo,.bar} * + search the PATH for scriptname{,.foo,.bar} * * If !DOSISH: * + look *only* in the PATH for scriptname{,.foo,.bar} (note * this will not look in '.' if it's not in the PATH) */ tmpbuf[0] = '\0'; #ifdef VMS # ifdef ALWAYS_DEFTYPES len = strlen(scriptname); if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') { int hasdir, idx = 0, deftypes = 1; bool seen_dot = 1; hasdir = !dosearch || (strpbrk(scriptname,":[= sizeof tmpbuf) continue; /* don't search dir with too-long name */ strcat(tmpbuf, scriptname); #else /* !VMS */ #ifdef DOSISH if (strEQ(scriptname, "-")) dosearch = 0; if (dosearch) { /* Look in '.' first. */ char *cur = scriptname; #ifdef SEARCH_EXTS if ((curext = strrchr(scriptname,'.'))) /* possible current ext */ while (ext[i]) if (strEQ(ext[i++],curext)) { extidx = -1; /* already has an ext */ break; } do { #endif DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",cur)); if (PerlLIO_stat(cur,&PL_statbuf) >= 0 && !S_ISDIR(PL_statbuf.st_mode)) { dosearch = 0; scriptname = cur; #ifdef SEARCH_EXTS break; #endif } #ifdef SEARCH_EXTS if (cur == scriptname) { len = strlen(scriptname); if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf)) break; cur = strcpy(tmpbuf, scriptname); } } while (extidx >= 0 && ext[extidx] /* try an extension? */ && strcpy(tmpbuf+len, ext[extidx++])); #endif } #endif #ifdef MACOS_TRADITIONAL if (dosearch && !strchr(scriptname, ':') && (s = PerlEnv_getenv("Commands"))) #else if (dosearch && !strchr(scriptname, '/') #ifdef DOSISH && !strchr(scriptname, '\\') #endif && (s = PerlEnv_getenv("PATH"))) #endif { bool seen_dot = 0; PL_bufend = s + strlen(s); while (s < PL_bufend) { #ifdef MACOS_TRADITIONAL s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend, ',', &len); #else #if defined(atarist) || defined(DOSISH) for (len = 0; *s # ifdef atarist && *s != ',' # endif && *s != ';'; len++, s++) { if (len < sizeof tmpbuf) tmpbuf[len] = *s; } if (len < sizeof tmpbuf) tmpbuf[len] = '\0'; #else /* ! (atarist || DOSISH) */ s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend, ':', &len); #endif /* ! (atarist || DOSISH) */ #endif /* MACOS_TRADITIONAL */ if (s < PL_bufend) s++; if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf) continue; /* don't search dir with too-long name */ #ifdef MACOS_TRADITIONAL if (len && tmpbuf[len - 1] != ':') tmpbuf[len++] = ':'; #else if (len #if defined(atarist) || defined(__MINT__) || defined(DOSISH) && tmpbuf[len - 1] != '/' && tmpbuf[len - 1] != '\\' #endif ) tmpbuf[len++] = '/'; if (len == 2 && tmpbuf[0] == '.') seen_dot = 1; #endif (void)strcpy(tmpbuf + len, scriptname); #endif /* !VMS */ #ifdef SEARCH_EXTS len = strlen(tmpbuf); if (extidx > 0) /* reset after previous loop */ extidx = 0; do { #endif DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf)); retval = PerlLIO_stat(tmpbuf,&PL_statbuf); if (S_ISDIR(PL_statbuf.st_mode)) { retval = -1; } #ifdef SEARCH_EXTS } while ( retval < 0 /* not there */ && extidx>=0 && ext[extidx] /* try an extension? */ && strcpy(tmpbuf+len, ext[extidx++]) ); #endif if (retval < 0) continue; if (S_ISREG(PL_statbuf.st_mode) && cando(S_IRUSR,TRUE,&PL_statbuf) #if !defined(DOSISH) && !defined(MACOS_TRADITIONAL) && cando(S_IXUSR,TRUE,&PL_statbuf) #endif ) { xfound = tmpbuf; /* bingo! */ break; } if (!xfailed) xfailed = savepv(tmpbuf); } #ifndef DOSISH if (!xfound && !seen_dot && !xfailed && (PerlLIO_stat(scriptname,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode))) #endif seen_dot = 1; /* Disable message. */ if (!xfound) { if (flags & 1) { /* do or die? */ Perl_croak(aTHX_ "Can't %s %s%s%s", (xfailed ? "execute" : "find"), (xfailed ? xfailed : scriptname), (xfailed ? "" : " on PATH"), (xfailed || seen_dot) ? "" : ", '.' not in PATH"); } scriptname = Nullch; } if (xfailed) Safefree(xfailed); scriptname = xfound; } return (scriptname ? savepv(scriptname) : Nullch); } #ifndef PERL_GET_CONTEXT_DEFINED void * Perl_get_context(void) { #if defined(USE_ITHREADS) # ifdef OLD_PTHREADS_API pthread_addr_t t; if (pthread_getspecific(PL_thr_key, &t)) Perl_croak_nocontext("panic: pthread_getspecific"); return (void*)t; # else # ifdef I_MACH_CTHREADS return (void*)cthread_data(cthread_self()); # else return (void*)PTHREAD_GETSPECIFIC(PL_thr_key); # endif # endif #else return (void*)NULL; #endif } void Perl_set_context(void *t) { #if defined(USE_ITHREADS) # ifdef I_MACH_CTHREADS cthread_set_data(cthread_self(), t); # else if (pthread_setspecific(PL_thr_key, t)) Perl_croak_nocontext("panic: pthread_setspecific"); # endif #endif } #endif /* !PERL_GET_CONTEXT_DEFINED */ #ifdef PERL_GLOBAL_STRUCT struct perl_vars * Perl_GetVars(pTHX) { return &PL_Vars; } #endif char ** Perl_get_op_names(pTHX) { return PL_op_name; } char ** Perl_get_op_descs(pTHX) { return PL_op_desc; } char * Perl_get_no_modify(pTHX) { return (char*)PL_no_modify; } U32 * Perl_get_opargs(pTHX) { return PL_opargs; } PPADDR_t* Perl_get_ppaddr(pTHX) { return (PPADDR_t*)PL_ppaddr; } #ifndef HAS_GETENV_LEN char * Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len) { char *env_trans = PerlEnv_getenv(env_elem); if (env_trans) *len = strlen(env_trans); return env_trans; } #endif MGVTBL* Perl_get_vtbl(pTHX_ int vtbl_id) { MGVTBL* result = Null(MGVTBL*); switch(vtbl_id) { case want_vtbl_sv: result = &PL_vtbl_sv; break; case want_vtbl_env: result = &PL_vtbl_env; break; case want_vtbl_envelem: result = &PL_vtbl_envelem; break; case want_vtbl_sig: result = &PL_vtbl_sig; break; case want_vtbl_sigelem: result = &PL_vtbl_sigelem; break; case want_vtbl_pack: result = &PL_vtbl_pack; break; case want_vtbl_packelem: result = &PL_vtbl_packelem; break; case want_vtbl_dbline: result = &PL_vtbl_dbline; break; case want_vtbl_isa: result = &PL_vtbl_isa; break; case want_vtbl_isaelem: result = &PL_vtbl_isaelem; break; case want_vtbl_arylen: result = &PL_vtbl_arylen; break; case want_vtbl_glob: result = &PL_vtbl_glob; break; case want_vtbl_mglob: result = &PL_vtbl_mglob; break; case want_vtbl_nkeys: result = &PL_vtbl_nkeys; break; case want_vtbl_taint: result = &PL_vtbl_taint; break; case want_vtbl_substr: result = &PL_vtbl_substr; break; case want_vtbl_vec: result = &PL_vtbl_vec; break; case want_vtbl_pos: result = &PL_vtbl_pos; break; case want_vtbl_bm: result = &PL_vtbl_bm; break; case want_vtbl_fm: result = &PL_vtbl_fm; break; case want_vtbl_uvar: result = &PL_vtbl_uvar; break; case want_vtbl_defelem: result = &PL_vtbl_defelem; break; case want_vtbl_regexp: result = &PL_vtbl_regexp; break; case want_vtbl_regdata: result = &PL_vtbl_regdata; break; case want_vtbl_regdatum: result = &PL_vtbl_regdatum; break; #ifdef USE_LOCALE_COLLATE case want_vtbl_collxfrm: result = &PL_vtbl_collxfrm; break; #endif case want_vtbl_amagic: result = &PL_vtbl_amagic; break; case want_vtbl_amagicelem: result = &PL_vtbl_amagicelem; break; case want_vtbl_backref: result = &PL_vtbl_backref; break; case want_vtbl_utf8: result = &PL_vtbl_utf8; break; } return result; } I32 Perl_my_fflush_all(pTHX) { #if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO) return PerlIO_flush(NULL); #else # if defined(HAS__FWALK) extern int fflush(FILE *); /* undocumented, unprototyped, but very useful BSDism */ extern void _fwalk(int (*)(FILE *)); _fwalk(&fflush); return 0; # else # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY) long open_max = -1; # ifdef PERL_FFLUSH_ALL_FOPEN_MAX open_max = PERL_FFLUSH_ALL_FOPEN_MAX; # else # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX) open_max = sysconf(_SC_OPEN_MAX); # else # ifdef FOPEN_MAX open_max = FOPEN_MAX; # else # ifdef OPEN_MAX open_max = OPEN_MAX; # else # ifdef _NFILE open_max = _NFILE; # endif # endif # endif # endif # endif if (open_max > 0) { long i; for (i = 0; i < open_max; i++) if (STDIO_STREAM_ARRAY[i]._file >= 0 && STDIO_STREAM_ARRAY[i]._file < open_max && STDIO_STREAM_ARRAY[i]._flag) PerlIO_flush(&STDIO_STREAM_ARRAY[i]); return 0; } # endif SETERRNO(EBADF,RMS_IFI); return EOF; # endif #endif } void Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op) { char *func = op == OP_READLINE ? "readline" : /* "" not nice */ op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */ PL_op_desc[op]; char *pars = OP_IS_FILETEST(op) ? "" : "()"; char *type = OP_IS_SOCKET(op) || (gv && io && IoTYPE(io) == IoTYPE_SOCKET) ? "socket" : "filehandle"; char *name = NULL; if (gv && isGV(gv)) { name = GvENAME(gv); } if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) { if (ckWARN(WARN_IO)) { const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out"; if (name && *name) Perl_warner(aTHX_ packWARN(WARN_IO), "Filehandle %s opened only for %sput", name, direction); else Perl_warner(aTHX_ packWARN(WARN_IO), "Filehandle opened only for %sput", direction); } } else { char *vile; I32 warn_type; if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) { vile = "closed"; warn_type = WARN_CLOSED; } else { vile = "unopened"; warn_type = WARN_UNOPENED; } if (ckWARN(warn_type)) { if (name && *name) { Perl_warner(aTHX_ packWARN(warn_type), "%s%s on %s %s %s", func, pars, vile, type, name); if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) Perl_warner( aTHX_ packWARN(warn_type), "\t(Are you trying to call %s%s on dirhandle %s?)\n", func, pars, name ); } else { Perl_warner(aTHX_ packWARN(warn_type), "%s%s on %s %s", func, pars, vile, type); if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) Perl_warner( aTHX_ packWARN(warn_type), "\t(Are you trying to call %s%s on dirhandle?)\n", func, pars ); } } } } #ifdef EBCDIC /* in ASCII order, not that it matters */ static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"; int Perl_ebcdic_control(pTHX_ int ch) { if (ch > 'a') { char *ctlp; if (islower(ch)) ch = toupper(ch); if ((ctlp = strchr(controllablechars, ch)) == 0) { Perl_die(aTHX_ "unrecognised control character '%c'\n", ch); } if (ctlp == controllablechars) return('\177'); /* DEL */ else return((unsigned char)(ctlp - controllablechars - 1)); } else { /* Want uncontrol */ if (ch == '\177' || ch == -1) return('?'); else if (ch == '\157') return('\177'); else if (ch == '\174') return('\000'); else if (ch == '^') /* '\137' in 1047, '\260' in 819 */ return('\036'); else if (ch == '\155') return('\037'); else if (0 < ch && ch < (sizeof(controllablechars) - 1)) return(controllablechars[ch+1]); else Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF); } } #endif /* To workaround core dumps from the uninitialised tm_zone we get the * system to give us a reasonable struct to copy. This fix means that * strftime uses the tm_zone and tm_gmtoff values returned by * localtime(time()). That should give the desired result most of the * time. But probably not always! * * This does not address tzname aspects of NETaa14816. * */ #ifdef HAS_GNULIBC # ifndef STRUCT_TM_HASZONE # define STRUCT_TM_HASZONE # endif #endif #ifdef STRUCT_TM_HASZONE /* Backward compat */ # ifndef HAS_TM_TM_ZONE # define HAS_TM_TM_ZONE # endif #endif void Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */ { #ifdef HAS_TM_TM_ZONE Time_t now; (void)time(&now); Copy(localtime(&now), ptm, 1, struct tm); #endif } /* * mini_mktime - normalise struct tm values without the localtime() * semantics (and overhead) of mktime(). */ void Perl_mini_mktime(pTHX_ struct tm *ptm) { int yearday; int secs; int month, mday, year, jday; int odd_cent, odd_year; #define DAYS_PER_YEAR 365 #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1) #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1) #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1) #define SECS_PER_HOUR (60*60) #define SECS_PER_DAY (24*SECS_PER_HOUR) /* parentheses deliberately absent on these two, otherwise they don't work */ #define MONTH_TO_DAYS 153/5 #define DAYS_TO_MONTH 5/153 /* offset to bias by March (month 4) 1st between month/mday & year finding */ #define YEAR_ADJUST (4*MONTH_TO_DAYS+1) /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */ #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */ /* * Year/day algorithm notes: * * With a suitable offset for numeric value of the month, one can find * an offset into the year by considering months to have 30.6 (153/5) days, * using integer arithmetic (i.e., with truncation). To avoid too much * messing about with leap days, we consider January and February to be * the 13th and 14th month of the previous year. After that transformation, * we need the month index we use to be high by 1 from 'normal human' usage, * so the month index values we use run from 4 through 15. * * Given that, and the rules for the Gregorian calendar (leap years are those * divisible by 4 unless also divisible by 100, when they must be divisible * by 400 instead), we can simply calculate the number of days since some * arbitrary 'beginning of time' by futzing with the (adjusted) year number, * the days we derive from our month index, and adding in the day of the * month. The value used here is not adjusted for the actual origin which * it normally would use (1 January A.D. 1), since we're not exposing it. * We're only building the value so we can turn around and get the * normalised values for the year, month, day-of-month, and day-of-year. * * For going backward, we need to bias the value we're using so that we find * the right year value. (Basically, we don't want the contribution of * March 1st to the number to apply while deriving the year). Having done * that, we 'count up' the contribution to the year number by accounting for * full quadracenturies (400-year periods) with their extra leap days, plus * the contribution from full centuries (to avoid counting in the lost leap * days), plus the contribution from full quad-years (to count in the normal * leap days), plus the leftover contribution from any non-leap years. * At this point, if we were working with an actual leap day, we'll have 0 * days left over. This is also true for March 1st, however. So, we have * to special-case that result, and (earlier) keep track of the 'odd' * century and year contributions. If we got 4 extra centuries in a qcent, * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb. * Otherwise, we add back in the earlier bias we removed (the 123 from * figuring in March 1st), find the month index (integer division by 30.6), * and the remainder is the day-of-month. We then have to convert back to * 'real' months (including fixing January and February from being 14/15 in * the previous year to being in the proper year). After that, to get * tm_yday, we work with the normalised year and get a new yearday value for * January 1st, which we subtract from the yearday value we had earlier, * representing the date we've re-built. This is done from January 1 * because tm_yday is 0-origin. * * Since POSIX time routines are only guaranteed to work for times since the * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm * applies Gregorian calendar rules even to dates before the 16th century * doesn't bother me. Besides, you'd need cultural context for a given * date to know whether it was Julian or Gregorian calendar, and that's * outside the scope for this routine. Since we convert back based on the * same rules we used to build the yearday, you'll only get strange results * for input which needed normalising, or for the 'odd' century years which * were leap years in the Julian calander but not in the Gregorian one. * I can live with that. * * This algorithm also fails to handle years before A.D. 1 gracefully, but * that's still outside the scope for POSIX time manipulation, so I don't * care. */ year = 1900 + ptm->tm_year; month = ptm->tm_mon; mday = ptm->tm_mday; /* allow given yday with no month & mday to dominate the result */ if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) { month = 0; mday = 0; jday = 1 + ptm->tm_yday; } else { jday = 0; } if (month >= 2) month+=2; else month+=14, year--; yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400; yearday += month*MONTH_TO_DAYS + mday + jday; /* * Note that we don't know when leap-seconds were or will be, * so we have to trust the user if we get something which looks * like a sensible leap-second. Wild values for seconds will * be rationalised, however. */ if ((unsigned) ptm->tm_sec <= 60) { secs = 0; } else { secs = ptm->tm_sec; ptm->tm_sec = 0; } secs += 60 * ptm->tm_min; secs += SECS_PER_HOUR * ptm->tm_hour; if (secs < 0) { if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) { /* got negative remainder, but need positive time */ /* back off an extra day to compensate */ yearday += (secs/SECS_PER_DAY)-1; secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1); } else { yearday += (secs/SECS_PER_DAY); secs -= SECS_PER_DAY * (secs/SECS_PER_DAY); } } else if (secs >= SECS_PER_DAY) { yearday += (secs/SECS_PER_DAY); secs %= SECS_PER_DAY; } ptm->tm_hour = secs/SECS_PER_HOUR; secs %= SECS_PER_HOUR; ptm->tm_min = secs/60; secs %= 60; ptm->tm_sec += secs; /* done with time of day effects */ /* * The algorithm for yearday has (so far) left it high by 428. * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to * bias it by 123 while trying to figure out what year it * really represents. Even with this tweak, the reverse * translation fails for years before A.D. 0001. * It would still fail for Feb 29, but we catch that one below. */ jday = yearday; /* save for later fixup vis-a-vis Jan 1 */ yearday -= YEAR_ADJUST; year = (yearday / DAYS_PER_QCENT) * 400; yearday %= DAYS_PER_QCENT; odd_cent = yearday / DAYS_PER_CENT; year += odd_cent * 100; yearday %= DAYS_PER_CENT; year += (yearday / DAYS_PER_QYEAR) * 4; yearday %= DAYS_PER_QYEAR; odd_year = yearday / DAYS_PER_YEAR; year += odd_year; yearday %= DAYS_PER_YEAR; if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */ month = 1; yearday = 29; } else { yearday += YEAR_ADJUST; /* recover March 1st crock */ month = yearday*DAYS_TO_MONTH; yearday -= month*MONTH_TO_DAYS; /* recover other leap-year adjustment */ if (month > 13) { month-=14; year++; } else { month-=2; } } ptm->tm_year = year - 1900; if (yearday) { ptm->tm_mday = yearday; ptm->tm_mon = month; } else { ptm->tm_mday = 31; ptm->tm_mon = month - 1; } /* re-build yearday based on Jan 1 to get tm_yday */ year--; yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400; yearday += 14*MONTH_TO_DAYS + 1; ptm->tm_yday = jday - yearday; /* fix tm_wday if not overridden by caller */ if ((unsigned)ptm->tm_wday > 6) ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7; } char * Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst) { #ifdef HAS_STRFTIME char *buf; int buflen; struct tm mytm; int len; init_tm(&mytm); /* XXX workaround - see init_tm() above */ mytm.tm_sec = sec; mytm.tm_min = min; mytm.tm_hour = hour; mytm.tm_mday = mday; mytm.tm_mon = mon; mytm.tm_year = year; mytm.tm_wday = wday; mytm.tm_yday = yday; mytm.tm_isdst = isdst; mini_mktime(&mytm); /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */ #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE)) STMT_START { struct tm mytm2; mytm2 = mytm; mktime(&mytm2); #ifdef HAS_TM_TM_GMTOFF mytm.tm_gmtoff = mytm2.tm_gmtoff; #endif #ifdef HAS_TM_TM_ZONE mytm.tm_zone = mytm2.tm_zone; #endif } STMT_END; #endif buflen = 64; New(0, buf, buflen, char); len = strftime(buf, buflen, fmt, &mytm); /* ** The following is needed to handle to the situation where ** tmpbuf overflows. Basically we want to allocate a buffer ** and try repeatedly. The reason why it is so complicated ** is that getting a return value of 0 from strftime can indicate ** one of the following: ** 1. buffer overflowed, ** 2. illegal conversion specifier, or ** 3. the format string specifies nothing to be returned(not ** an error). This could be because format is an empty string ** or it specifies %p that yields an empty string in some locale. ** If there is a better way to make it portable, go ahead by ** all means. */ if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0')) return buf; else { /* Possibly buf overflowed - try again with a bigger buf */ int fmtlen = strlen(fmt); int bufsize = fmtlen + buflen; New(0, buf, bufsize, char); while (buf) { buflen = strftime(buf, bufsize, fmt, &mytm); if (buflen > 0 && buflen < bufsize) break; /* heuristic to prevent out-of-memory errors */ if (bufsize > 100*fmtlen) { Safefree(buf); buf = NULL; break; } bufsize *= 2; Renew(buf, bufsize, char); } return buf; } #else Perl_croak(aTHX_ "panic: no strftime"); #endif } #define SV_CWD_RETURN_UNDEF \ sv_setsv(sv, &PL_sv_undef); \ return FALSE #define SV_CWD_ISDOT(dp) \ (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) /* =head1 Miscellaneous Functions =for apidoc getcwd_sv Fill the sv with current working directory =cut */ /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars. * rewritten again by dougm, optimized for use with xs TARG, and to prefer * getcwd(3) if available * Comments from the orignal: * This is a faster version of getcwd. It's also more dangerous * because you might chdir out of a directory that you can't chdir * back into. */ int Perl_getcwd_sv(pTHX_ register SV *sv) { #ifndef PERL_MICRO #ifndef INCOMPLETE_TAINTS SvTAINTED_on(sv); #endif #ifdef HAS_GETCWD { char buf[MAXPATHLEN]; /* Some getcwd()s automatically allocate a buffer of the given * size from the heap if they are given a NULL buffer pointer. * The problem is that this behaviour is not portable. */ if (getcwd(buf, sizeof(buf) - 1)) { STRLEN len = strlen(buf); sv_setpvn(sv, buf, len); return TRUE; } else { sv_setsv(sv, &PL_sv_undef); return FALSE; } } #else Stat_t statbuf; int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; int namelen, pathlen=0; DIR *dir; Direntry_t *dp; (void)SvUPGRADE(sv, SVt_PV); if (PerlLIO_lstat(".", &statbuf) < 0) { SV_CWD_RETURN_UNDEF; } orig_cdev = statbuf.st_dev; orig_cino = statbuf.st_ino; cdev = orig_cdev; cino = orig_cino; for (;;) { odev = cdev; oino = cino; if (PerlDir_chdir("..") < 0) { SV_CWD_RETURN_UNDEF; } if (PerlLIO_stat(".", &statbuf) < 0) { SV_CWD_RETURN_UNDEF; } cdev = statbuf.st_dev; cino = statbuf.st_ino; if (odev == cdev && oino == cino) { break; } if (!(dir = PerlDir_open("."))) { SV_CWD_RETURN_UNDEF; } while ((dp = PerlDir_read(dir)) != NULL) { #ifdef DIRNAMLEN namelen = dp->d_namlen; #else namelen = strlen(dp->d_name); #endif /* skip . and .. */ if (SV_CWD_ISDOT(dp)) { continue; } if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { SV_CWD_RETURN_UNDEF; } tdev = statbuf.st_dev; tino = statbuf.st_ino; if (tino == oino && tdev == odev) { break; } } if (!dp) { SV_CWD_RETURN_UNDEF; } if (pathlen + namelen + 1 >= MAXPATHLEN) { SV_CWD_RETURN_UNDEF; } SvGROW(sv, pathlen + namelen + 1); if (pathlen) { /* shift down */ Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char); } /* prepend current directory to the front */ *SvPVX(sv) = '/'; Move(dp->d_name, SvPVX(sv)+1, namelen, char); pathlen += (namelen + 1); #ifdef VOID_CLOSEDIR PerlDir_close(dir); #else if (PerlDir_close(dir) < 0) { SV_CWD_RETURN_UNDEF; } #endif } if (pathlen) { SvCUR_set(sv, pathlen); *SvEND(sv) = '\0'; SvPOK_only(sv); if (PerlDir_chdir(SvPVX(sv)) < 0) { SV_CWD_RETURN_UNDEF; } } if (PerlLIO_stat(".", &statbuf) < 0) { SV_CWD_RETURN_UNDEF; } cdev = statbuf.st_dev; cino = statbuf.st_ino; if (cdev != orig_cdev || cino != orig_cino) { Perl_croak(aTHX_ "Unstable directory path, " "current directory changed unexpectedly"); } return TRUE; #endif #else return FALSE; #endif } /* =for apidoc scan_version Returns a pointer to the next character after the parsed version string, as well as upgrading the passed in SV to an RV. Function must be called with an already existing SV like sv = newSV(0); s = scan_version(s,SV *sv, bool qv); Performs some preprocessing to the string to ensure that it has the correct characteristics of a version. Flags the object if it contains an underscore (which denotes this is a alpha version). The boolean qv denotes that the version should be interpreted as if it had multiple decimals, even if it doesn't. =cut */ char * Perl_scan_version(pTHX_ char *s, SV *rv, bool qv) { const char *start = s; char *pos = s; I32 saw_period = 0; bool saw_under = 0; SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */ (void)sv_upgrade(sv, SVt_PVAV); /* needs to be an AV type */ AvREAL_on((AV*)sv); /* pre-scan the imput string to check for decimals */ while ( *pos == '.' || *pos == '_' || isDIGIT(*pos) ) { if ( *pos == '.' ) { if ( saw_under ) Perl_croak(aTHX_ "Invalid version format (underscores before decimal)"); saw_period++ ; } else if ( *pos == '_' ) { if ( saw_under ) Perl_croak(aTHX_ "Invalid version format (multiple underscores)"); saw_under = 1; } pos++; } pos = s; if (*pos == 'v') { pos++; /* get past 'v' */ qv = 1; /* force quoted version processing */ } while (isDIGIT(*pos)) pos++; if (!isALPHA(*pos)) { I32 rev; if (*s == 'v') s++; /* get past 'v' */ for (;;) { rev = 0; { /* this is atoi() that delimits on underscores */ char *end = pos; I32 mult = 1; I32 orev; if ( s < pos && s > start && *(s-1) == '_' ) { mult *= -1; /* alpha version */ } /* the following if() will only be true after the decimal * point of a version originally created with a bare * floating point number, i.e. not quoted in any way */ if ( !qv && s > start+1 && saw_period == 1 ) { mult *= 100; while ( s < end ) { orev = rev; rev += (*s - '0') * mult; mult /= 10; if ( PERL_ABS(orev) > PERL_ABS(rev) ) Perl_croak(aTHX_ "Integer overflow in version"); s++; } } else { while (--end >= s) { orev = rev; rev += (*end - '0') * mult; mult *= 10; if ( PERL_ABS(orev) > PERL_ABS(rev) ) Perl_croak(aTHX_ "Integer overflow in version"); } } } /* Append revision */ av_push((AV *)sv, newSViv(rev)); if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1])) s = ++pos; else if ( isDIGIT(*pos) ) s = pos; else { s = pos; break; } while ( isDIGIT(*pos) ) { if ( saw_period == 1 && pos-s == 3 ) break; pos++; } } } if ( qv ) { /* quoted versions always become full version objects */ I32 len = av_len((AV *)sv); /* This for loop appears to trigger a compiler bug on OS X, as it loops infinitely. Yes, len is negative. No, it makes no sense. Compiler in question is: gcc version 3.3 20030304 (Apple Computer, Inc. build 1640) for ( len = 2 - len; len > 0; len-- ) av_push((AV *)sv, newSViv(0)); */ len = 2 - len; while (len-- > 0) av_push((AV *)sv, newSViv(0)); } return s; } /* =for apidoc new_version Returns a new version object based on the passed in SV: SV *sv = new_version(SV *ver); Does not alter the passed in ver SV. See "upg_version" if you want to upgrade the SV. =cut */ SV * Perl_new_version(pTHX_ SV *ver) { SV *rv = newSV(0); if ( sv_derived_from(ver,"version") ) /* can just copy directly */ { I32 key; AV *av = (AV *)SvRV(ver); SV* sv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */ (void)sv_upgrade(sv, SVt_PVAV); /* needs to be an AV type */ AvREAL_on((AV*)sv); for ( key = 0; key <= av_len(av); key++ ) { I32 rev = SvIV(*av_fetch(av, key, FALSE)); av_push((AV *)sv, newSViv(rev)); } return rv; } #ifdef SvVOK if ( SvVOK(ver) ) { /* already a v-string */ char *version; MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring); version = savepvn( (const char*)mg->mg_ptr,mg->mg_len ); sv_setpv(rv,version); Safefree(version); } else { #endif sv_setsv(rv,ver); /* make a duplicate */ #ifdef SvVOK } #endif upg_version(rv); return rv; } /* =for apidoc upg_version In-place upgrade of the supplied SV to a version object. SV *sv = upg_version(SV *sv); Returns a pointer to the upgraded SV. =cut */ SV * Perl_upg_version(pTHX_ SV *ver) { char *version; bool qv = 0; if ( SvNOK(ver) ) /* may get too much accuracy */ { char tbuf[64]; sprintf(tbuf,"%.9"NVgf, SvNVX(ver)); version = savepv(tbuf); } #ifdef SvVOK else if ( SvVOK(ver) ) { /* already a v-string */ MAGIC* mg = mg_find(ver,PERL_MAGIC_vstring); version = savepvn( (const char*)mg->mg_ptr,mg->mg_len ); qv = 1; } #endif else /* must be a string or something like a string */ { version = savesvpv(ver); } (void)scan_version(version, ver, qv); Safefree(version); return ver; } /* =for apidoc vnumify Accepts a version object and returns the normalized floating point representation. Call like: sv = vnumify(rv); NOTE: you can pass either the object directly or the SV contained within the RV. =cut */ SV * Perl_vnumify(pTHX_ SV *vs) { I32 i, len, digit; SV *sv = newSV(0); if ( SvROK(vs) ) vs = SvRV(vs); len = av_len((AV *)vs); if ( len == -1 ) { Perl_sv_catpv(aTHX_ sv,"0"); return sv; } digit = SvIVX(*av_fetch((AV *)vs, 0, 0)); Perl_sv_setpvf(aTHX_ sv,"%d.", (int)PERL_ABS(digit)); for ( i = 1 ; i < len ; i++ ) { digit = SvIVX(*av_fetch((AV *)vs, i, 0)); Perl_sv_catpvf(aTHX_ sv,"%03d", (int)PERL_ABS(digit)); } if ( len > 0 ) { digit = SvIVX(*av_fetch((AV *)vs, len, 0)); if ( (int)PERL_ABS(digit) != 0 || len == 1 ) { if ( digit < 0 ) /* alpha version */ Perl_sv_catpv(aTHX_ sv,"_"); /* Don't display additional trailing zeros */ Perl_sv_catpvf(aTHX_ sv,"%03d", (int)PERL_ABS(digit)); } } else /* len == 0 */ { Perl_sv_catpv(aTHX_ sv,"000"); } return sv; } /* =for apidoc vnormal Accepts a version object and returns the normalized string representation. Call like: sv = vnormal(rv); NOTE: you can pass either the object directly or the SV contained within the RV. =cut */ SV * Perl_vnormal(pTHX_ SV *vs) { I32 i, len, digit; SV *sv = newSV(0); if ( SvROK(vs) ) vs = SvRV(vs); len = av_len((AV *)vs); if ( len == -1 ) { Perl_sv_catpv(aTHX_ sv,""); return sv; } digit = SvIVX(*av_fetch((AV *)vs, 0, 0)); Perl_sv_setpvf(aTHX_ sv,"%"IVdf,(IV)digit); for ( i = 1 ; i <= len ; i++ ) { digit = SvIVX(*av_fetch((AV *)vs, i, 0)); if ( digit < 0 ) Perl_sv_catpvf(aTHX_ sv,"_%"IVdf,(IV)-digit); else Perl_sv_catpvf(aTHX_ sv,".%"IVdf,(IV)digit); } if ( len <= 2 ) { /* short version, must be at least three */ for ( len = 2 - len; len != 0; len-- ) Perl_sv_catpv(aTHX_ sv,".0"); } return sv; } /* =for apidoc vstringify In order to maintain maximum compatibility with earlier versions of Perl, this function will return either the floating point notation or the multiple dotted notation, depending on whether the original version contained 1 or more dots, respectively =cut */ SV * Perl_vstringify(pTHX_ SV *vs) { I32 len, digit; if ( SvROK(vs) ) vs = SvRV(vs); len = av_len((AV *)vs); digit = SvIVX(*av_fetch((AV *)vs, len, 0)); if ( len < 2 || ( len == 2 && digit < 0 ) ) return vnumify(vs); else return vnormal(vs); } /* =for apidoc vcmp Version object aware cmp. Both operands must already have been converted into version objects. =cut */ int Perl_vcmp(pTHX_ SV *lsv, SV *rsv) { I32 i,l,m,r,retval; if ( SvROK(lsv) ) lsv = SvRV(lsv); if ( SvROK(rsv) ) rsv = SvRV(rsv); l = av_len((AV *)lsv); r = av_len((AV *)rsv); m = l < r ? l : r; retval = 0; i = 0; while ( i <= m && retval == 0 ) { I32 left = SvIV(*av_fetch((AV *)lsv,i,0)); I32 right = SvIV(*av_fetch((AV *)rsv,i,0)); bool lalpha = left < 0 ? 1 : 0; bool ralpha = right < 0 ? 1 : 0; left = abs(left); right = abs(right); if ( left < right || (left == right && lalpha && !ralpha) ) retval = -1; if ( left > right || (left == right && ralpha && !lalpha) ) retval = +1; i++; } if ( l != r && retval == 0 ) /* possible match except for trailing 0's */ { if ( l < r ) { while ( i <= r && retval == 0 ) { if ( SvIV(*av_fetch((AV *)rsv,i,0)) != 0 ) retval = -1; /* not a match after all */ i++; } } else { while ( i <= l && retval == 0 ) { if ( SvIV(*av_fetch((AV *)lsv,i,0)) != 0 ) retval = +1; /* not a match after all */ i++; } } } return retval; } #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT) # define EMULATE_SOCKETPAIR_UDP #endif #ifdef EMULATE_SOCKETPAIR_UDP static int S_socketpair_udp (int fd[2]) { dTHX; /* Fake a datagram socketpair using UDP to localhost. */ int sockets[2] = {-1, -1}; struct sockaddr_in addresses[2]; int i; Sock_size_t size = sizeof(struct sockaddr_in); unsigned short port; int got; memset(&addresses, 0, sizeof(addresses)); i = 1; do { sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET); if (sockets[i] == -1) goto tidy_up_and_fail; addresses[i].sin_family = AF_INET; addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK); addresses[i].sin_port = 0; /* kernel choses port. */ if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i], sizeof(struct sockaddr_in)) == -1) goto tidy_up_and_fail; } while (i--); /* Now have 2 UDP sockets. Find out which port each is connected to, and for each connect the other socket to it. */ i = 1; do { if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i], &size) == -1) goto tidy_up_and_fail; if (size != sizeof(struct sockaddr_in)) goto abort_tidy_up_and_fail; /* !1 is 0, !0 is 1 */ if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i], sizeof(struct sockaddr_in)) == -1) goto tidy_up_and_fail; } while (i--); /* Now we have 2 sockets connected to each other. I don't trust some other process not to have already sent a packet to us (by random) so send a packet from each to the other. */ i = 1; do { /* I'm going to send my own port number. As a short. (Who knows if someone somewhere has sin_port as a bitfield and needs this routine. (I'm assuming crays have socketpair)) */ port = addresses[i].sin_port; got = PerlLIO_write(sockets[i], &port, sizeof(port)); if (got != sizeof(port)) { if (got == -1) goto tidy_up_and_fail; goto abort_tidy_up_and_fail; } } while (i--); /* Packets sent. I don't trust them to have arrived though. (As I understand it Solaris TCP stack is multithreaded. Non-blocking connect to localhost will use a second kernel thread. In 2.6 the first thread running the connect() returns before the second completes, so EINPROGRESS> In 2.7 the improved stack is faster and connect() returns 0. Poor programs have tripped up. One poor program's authors' had a 50-1 reverse stock split. Not sure how connected these were.) So I don't trust someone not to have an unpredictable UDP stack. */ { struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */ int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0]; fd_set rset; FD_ZERO(&rset); FD_SET(sockets[0], &rset); FD_SET(sockets[1], &rset); got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor); if (got != 2 || !FD_ISSET(sockets[0], &rset) || !FD_ISSET(sockets[1], &rset)) { /* I hope this is portable and appropriate. */ if (got == -1) goto tidy_up_and_fail; goto abort_tidy_up_and_fail; } } /* And the paranoia department even now doesn't trust it to have arrive (hence MSG_DONTWAIT). Or that what arrives was sent by us. */ { struct sockaddr_in readfrom; unsigned short buffer[2]; i = 1; do { #ifdef MSG_DONTWAIT got = PerlSock_recvfrom(sockets[i], (char *) &buffer, sizeof(buffer), MSG_DONTWAIT, (struct sockaddr *) &readfrom, &size); #else got = PerlSock_recvfrom(sockets[i], (char *) &buffer, sizeof(buffer), 0, (struct sockaddr *) &readfrom, &size); #endif if (got == -1) goto tidy_up_and_fail; if (got != sizeof(port) || size != sizeof(struct sockaddr_in) /* Check other socket sent us its port. */ || buffer[0] != (unsigned short) addresses[!i].sin_port /* Check kernel says we got the datagram from that socket */ || readfrom.sin_family != addresses[!i].sin_family || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr || readfrom.sin_port != addresses[!i].sin_port) goto abort_tidy_up_and_fail; } while (i--); } /* My caller (my_socketpair) has validated that this is non-NULL */ fd[0] = sockets[0]; fd[1] = sockets[1]; /* I hereby declare this connection open. May God bless all who cross her. */ return 0; abort_tidy_up_and_fail: errno = ECONNABORTED; tidy_up_and_fail: { int save_errno = errno; if (sockets[0] != -1) PerlLIO_close(sockets[0]); if (sockets[1] != -1) PerlLIO_close(sockets[1]); errno = save_errno; return -1; } } #endif /* EMULATE_SOCKETPAIR_UDP */ #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) int Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { /* Stevens says that family must be AF_LOCAL, protocol 0. I'm going to enforce that, then ignore it, and use TCP (or UDP). */ dTHX; int listener = -1; int connector = -1; int acceptor = -1; struct sockaddr_in listen_addr; struct sockaddr_in connect_addr; Sock_size_t size; if (protocol #ifdef AF_UNIX || family != AF_UNIX #endif ) { errno = EAFNOSUPPORT; return -1; } if (!fd) { errno = EINVAL; return -1; } #ifdef EMULATE_SOCKETPAIR_UDP if (type == SOCK_DGRAM) return S_socketpair_udp(fd); #endif listener = PerlSock_socket(AF_INET, type, 0); if (listener == -1) return -1; memset(&listen_addr, 0, sizeof(listen_addr)); listen_addr.sin_family = AF_INET; listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); listen_addr.sin_port = 0; /* kernel choses port. */ if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr, sizeof(listen_addr)) == -1) goto tidy_up_and_fail; if (PerlSock_listen(listener, 1) == -1) goto tidy_up_and_fail; connector = PerlSock_socket(AF_INET, type, 0); if (connector == -1) goto tidy_up_and_fail; /* We want to find out the port number to connect to. */ size = sizeof(connect_addr); if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr, &size) == -1) goto tidy_up_and_fail; if (size != sizeof(connect_addr)) goto abort_tidy_up_and_fail; if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr, sizeof(connect_addr)) == -1) goto tidy_up_and_fail; size = sizeof(listen_addr); acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr, &size); if (acceptor == -1) goto tidy_up_and_fail; if (size != sizeof(listen_addr)) goto abort_tidy_up_and_fail; PerlLIO_close(listener); /* Now check we are talking to ourself by matching port and host on the two sockets. */ if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr, &size) == -1) goto tidy_up_and_fail; if (size != sizeof(connect_addr) || listen_addr.sin_family != connect_addr.sin_family || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr || listen_addr.sin_port != connect_addr.sin_port) { goto abort_tidy_up_and_fail; } fd[0] = connector; fd[1] = acceptor; return 0; abort_tidy_up_and_fail: errno = ECONNABORTED; /* I hope this is portable and appropriate. */ tidy_up_and_fail: { int save_errno = errno; if (listener != -1) PerlLIO_close(listener); if (connector != -1) PerlLIO_close(connector); if (acceptor != -1) PerlLIO_close(acceptor); errno = save_errno; return -1; } } #else /* In any case have a stub so that there's code corresponding * to the my_socketpair in global.sym. */ int Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { #ifdef HAS_SOCKETPAIR return socketpair(family, type, protocol, fd); #else return -1; #endif } #endif /* =for apidoc sv_nosharing Dummy routine which "shares" an SV when there is no sharing module present. Exists to avoid test for a NULL function pointer and because it could potentially warn under some level of strict-ness. =cut */ void Perl_sv_nosharing(pTHX_ SV *sv) { } /* =for apidoc sv_nolocking Dummy routine which "locks" an SV when there is no locking module present. Exists to avoid test for a NULL function pointer and because it could potentially warn under some level of strict-ness. =cut */ void Perl_sv_nolocking(pTHX_ SV *sv) { } /* =for apidoc sv_nounlocking Dummy routine which "unlocks" an SV when there is no locking module present. Exists to avoid test for a NULL function pointer and because it could potentially warn under some level of strict-ness. =cut */ void Perl_sv_nounlocking(pTHX_ SV *sv) { } U32 Perl_parse_unicode_opts(pTHX_ char **popt) { char *p = *popt; U32 opt = 0; if (*p) { if (isDIGIT(*p)) { opt = (U32) atoi(p); while (isDIGIT(*p)) p++; if (*p && *p != '\n' && *p != '\r') Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p); } else { for (; *p; p++) { switch (*p) { case PERL_UNICODE_STDIN: opt |= PERL_UNICODE_STDIN_FLAG; break; case PERL_UNICODE_STDOUT: opt |= PERL_UNICODE_STDOUT_FLAG; break; case PERL_UNICODE_STDERR: opt |= PERL_UNICODE_STDERR_FLAG; break; case PERL_UNICODE_STD: opt |= PERL_UNICODE_STD_FLAG; break; case PERL_UNICODE_IN: opt |= PERL_UNICODE_IN_FLAG; break; case PERL_UNICODE_OUT: opt |= PERL_UNICODE_OUT_FLAG; break; case PERL_UNICODE_INOUT: opt |= PERL_UNICODE_INOUT_FLAG; break; case PERL_UNICODE_LOCALE: opt |= PERL_UNICODE_LOCALE_FLAG; break; case PERL_UNICODE_ARGV: opt |= PERL_UNICODE_ARGV_FLAG; break; default: if (*p != '\n' && *p != '\r') Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p); } } } } else opt = PERL_UNICODE_DEFAULT_FLAGS; if (opt & ~PERL_UNICODE_ALL_FLAGS) Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf, (UV) (opt & ~PERL_UNICODE_ALL_FLAGS)); *popt = p; return opt; } U32 Perl_seed(pTHX) { /* * This is really just a quick hack which grabs various garbage * values. It really should be a real hash algorithm which * spreads the effect of every input bit onto every output bit, * if someone who knows about such things would bother to write it. * Might be a good idea to add that function to CORE as well. * No numbers below come from careful analysis or anything here, * except they are primes and SEED_C1 > 1E6 to get a full-width * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should * probably be bigger too. */ #if RANDBITS > 16 # define SEED_C1 1000003 #define SEED_C4 73819 #else # define SEED_C1 25747 #define SEED_C4 20639 #endif #define SEED_C2 3 #define SEED_C3 269 #define SEED_C5 26107 #ifndef PERL_NO_DEV_RANDOM int fd; #endif U32 u; #ifdef VMS # include /* when[] = (low 32 bits, high 32 bits) of time since epoch * in 100-ns units, typically incremented ever 10 ms. */ unsigned int when[2]; #else # ifdef HAS_GETTIMEOFDAY struct timeval when; # else Time_t when; # endif #endif /* This test is an escape hatch, this symbol isn't set by Configure. */ #ifndef PERL_NO_DEV_RANDOM #ifndef PERL_RANDOM_DEVICE /* /dev/random isn't used by default because reads from it will block * if there isn't enough entropy available. You can compile with * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there * is enough real entropy to fill the seed. */ # define PERL_RANDOM_DEVICE "/dev/urandom" #endif fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0); if (fd != -1) { if (PerlLIO_read(fd, &u, sizeof u) != sizeof u) u = 0; PerlLIO_close(fd); if (u) return u; } #endif #ifdef VMS _ckvmssts(sys$gettim(when)); u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1]; #else # ifdef HAS_GETTIMEOFDAY PerlProc_gettimeofday(&when,NULL); u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec; # else (void)time(&when); u = (U32)SEED_C1 * when; # endif #endif u += SEED_C3 * (U32)PerlProc_getpid(); u += SEED_C4 * (U32)PTR2UV(PL_stack_sp); #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */ u += SEED_C5 * (U32)PTR2UV(&when); #endif return u; } UV Perl_get_hash_seed(pTHX) { char *s = PerlEnv_getenv("PERL_HASH_SEED"); UV myseed = 0; if (s) while (isSPACE(*s)) s++; if (s && isDIGIT(*s)) myseed = (UV)Atoul(s); else #ifdef USE_HASH_SEED_EXPLICIT if (s) #endif { /* Compute a random seed */ (void)seedDrand01((Rand_seed_t)seed()); myseed = (UV)(Drand01() * (NV)UV_MAX); #if RANDBITS < (UVSIZE * 8) /* Since there are not enough randbits to to reach all * the bits of a UV, the low bits might need extra * help. Sum in another random number that will * fill in the low bits. */ myseed += (UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1)); #endif /* RANDBITS < (UVSIZE * 8) */ if (myseed == 0) { /* Superparanoia. */ myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */ if (myseed == 0) Perl_croak(aTHX_ "Your random numbers are not that random"); } } PL_rehash_seed_set = TRUE; return myseed; }