/* util.c * * Copyright (c) 1991-2002, Larry Wall * * 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 */ #include "EXTERN.h" #define PERL_IN_UTIL_C #include "perl.h" #ifndef PERL_MICRO #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) #include #endif #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 #ifdef LEAKTEST long xcount[MAXXCOUNT]; long lastxcount[MAXXCOUNT]; long xycount[MAXXCOUNT][MAXYCOUNT]; long lastxycount[MAXXCOUNT][MAXYCOUNT]; #endif #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 { PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH; 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 { PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH; 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 { PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH; my_exit(1); return Nullch; } /*NOTREACHED*/ } #ifdef LEAKTEST struct mem_test_strut { union { long type; char c[2]; } u; long size; }; # define ALIGN sizeof(struct mem_test_strut) # define sizeof_chunk(ch) (((struct mem_test_strut*) (ch))->size) # define typeof_chunk(ch) \ (((struct mem_test_strut*) (ch))->u.c[0] + ((struct mem_test_strut*) (ch))->u.c[1]*100) # define set_typeof_chunk(ch,t) \ (((struct mem_test_strut*) (ch))->u.c[0] = t % 100, ((struct mem_test_strut*) (ch))->u.c[1] = t / 100) #define SIZE_TO_Y(size) ( (size) > MAXY_SIZE \ ? MAXYCOUNT - 1 \ : ( (size) > 40 \ ? ((size) - 1)/8 + 5 \ : ((size) - 1)/4)) Malloc_t Perl_safexmalloc(I32 x, MEM_SIZE size) { register char* where = (char*)safemalloc(size + ALIGN); xcount[x] += size; xycount[x][SIZE_TO_Y(size)]++; set_typeof_chunk(where, x); sizeof_chunk(where) = size; return (Malloc_t)(where + ALIGN); } Malloc_t Perl_safexrealloc(Malloc_t wh, MEM_SIZE size) { char *where = (char*)wh; if (!wh) return safexmalloc(0,size); { MEM_SIZE old = sizeof_chunk(where - ALIGN); int t = typeof_chunk(where - ALIGN); register char* new = (char*)saferealloc(where - ALIGN, size + ALIGN); xycount[t][SIZE_TO_Y(old)]--; xycount[t][SIZE_TO_Y(size)]++; xcount[t] += size - old; sizeof_chunk(new) = size; return (Malloc_t)(new + ALIGN); } } void Perl_safexfree(Malloc_t wh) { I32 x; char *where = (char*)wh; MEM_SIZE size; if (!where) return; where -= ALIGN; size = sizeof_chunk(where); x = where[0] + 100 * where[1]; xcount[x] -= size; xycount[x][SIZE_TO_Y(size)]--; safefree(where); } Malloc_t Perl_safexcalloc(I32 x,MEM_SIZE count, MEM_SIZE size) { register char * where = (char*)safexmalloc(x, size * count + ALIGN); xcount[x] += size; xycount[x][SIZE_TO_Y(size)]++; memset((void*)(where + ALIGN), 0, size * count); set_typeof_chunk(where, x); sizeof_chunk(where) = size; return (Malloc_t)(where + ALIGN); } STATIC void S_xstat(pTHX_ int flag) { register I32 i, j, total = 0; I32 subtot[MAXYCOUNT]; for (j = 0; j < MAXYCOUNT; j++) { subtot[j] = 0; } PerlIO_printf(Perl_debug_log, " Id subtot 4 8 12 16 20 24 28 32 36 40 48 56 64 72 80 80+\n", total); for (i = 0; i < MAXXCOUNT; i++) { total += xcount[i]; for (j = 0; j < MAXYCOUNT; j++) { subtot[j] += xycount[i][j]; } if (flag == 0 ? xcount[i] /* Have something */ : (flag == 2 ? xcount[i] != lastxcount[i] /* Changed */ : xcount[i] > lastxcount[i])) { /* Growed */ PerlIO_printf(Perl_debug_log,"%2d %02d %7ld ", i / 100, i % 100, flag == 2 ? xcount[i] - lastxcount[i] : xcount[i]); lastxcount[i] = xcount[i]; for (j = 0; j < MAXYCOUNT; j++) { if ( flag == 0 ? xycount[i][j] /* Have something */ : (flag == 2 ? xycount[i][j] != lastxycount[i][j] /* Changed */ : xycount[i][j] > lastxycount[i][j])) { /* Growed */ PerlIO_printf(Perl_debug_log,"%3ld ", flag == 2 ? xycount[i][j] - lastxycount[i][j] : xycount[i][j]); lastxycount[i][j] = xycount[i][j]; } else { PerlIO_printf(Perl_debug_log, " . ", xycount[i][j]); } } PerlIO_printf(Perl_debug_log, "\n"); } } if (flag != 2) { PerlIO_printf(Perl_debug_log, "Total %7ld ", total); for (j = 0; j < MAXYCOUNT; j++) { if (subtot[j]) { PerlIO_printf(Perl_debug_log, "%3ld ", subtot[j]); } else { PerlIO_printf(Perl_debug_log, " . "); } } PerlIO_printf(Perl_debug_log, "\n"); } } #endif /* LEAKTEST */ /* These must be defined when not using Perl's malloc for binary * compatibility */ #ifndef MYMALLOC Malloc_t Perl_malloc (MEM_SIZE nbytes) { dTHXs; return PerlMem_malloc(nbytes); } Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size) { dTHXs; return PerlMem_calloc(elements, size); } Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes) { dTHXs; return 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) sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */ 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) = 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 (bigend - big < littlelen) { if ( SvTAIL(littlestr) && (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 > 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 occurence. 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 Copy a string to a safe spot. This does not use an SV. =cut */ char * Perl_savepv(pTHX_ const char *sv) { register char *newaddr = Nullch; if (sv) { New(902,newaddr,strlen(sv)+1,char); (void)strcpy(newaddr,sv); } return newaddr; } /* same thing but with a known length */ /* =for apidoc savepvn Copy a string to a safe spot. The C indicates number of bytes to copy. If pointer is NULL allocate space for a string of size specified. This does not use an SV. =cut */ char * Perl_savepvn(pTHX_ const char *sv, 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 (sv) { Copy(sv,newaddr,len,char); /* might not be null terminated */ newaddr[len] = '\0'; /* is now */ } else { Zero(newaddr,len+1,char); } return newaddr; } /* =for apidoc savesharedpv Copy a string to a safe spot in memory shared between threads. This does not use an SV. =cut */ char * Perl_savesharedpv(pTHX_ const char *sv) { register char *newaddr = Nullch; if (sv) { newaddr = PerlMemShared_malloc(strlen(sv)+1); (void)strcpy(newaddr,sv); } return newaddr; } /* 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))); } #ifdef USE_5005THREADS if (thr->tid) Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid); #endif sv_catpv(sv, PL_dirty ? dgd : ".\n"); } return sv; } OP * Perl_vdie(pTHX_ const char* pat, va_list *args) { char *message; int was_in_eval = PL_in_eval; HV *stash; GV *gv; CV *cv; SV *msv; STRLEN msglen; DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: die: curstack = %p, mainstack = %p\n", thr, PL_curstack, PL_mainstack)); if (pat) { 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); } else { message = Nullch; msglen = 0; } DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: die: message = %s\ndiehook = %p\n", thr, message, PL_diehook)); if (PL_diehook) { /* sv_2cv might call Perl_croak() */ SV *olddiehook = 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); SvREADONLY_on(msg); SAVEFREESV(msg); } else { msg = ERRSV; } PUSHSTACKi(PERLSI_DIEHOOK); PUSHMARK(SP); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; } } PL_restartop = die_where(message, msglen); 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; HV *stash; GV *gv; CV *cv; SV *msv; STRLEN msglen; if (pat) { 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); } else { message = Nullch; msglen = 0; } DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message)); if (PL_diehook) { /* sv_2cv might call Perl_croak() */ SV *olddiehook = 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); SvREADONLY_on(msg); SAVEFREESV(msg); } else { msg = ERRSV; } PUSHSTACKi(PERLSI_DIEHOOK); PUSHMARK(SP); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; } } if (PL_in_eval) { PL_restartop = die_where(message, msglen); JMPENV_JUMP(3); } else if (!message) message = SvPVx(ERRSV, msglen); { #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 } 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 use this function the same way you use the C C function. 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; msv = vmess(pat, args); 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); SvREADONLY_on(msg); SAVEFREESV(msg); PUSHSTACKi(PERLSI_WARNHOOK); PUSHMARK(SP); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; return; } } { PerlIO *serr = Perl_error_log; PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen); #ifdef LEAKTEST DEBUG_L(*message == '!' ? (xstat(message[1]=='!' ? (message[2]=='!' ? 2 : 1) : 0) , 0) : 0); #endif (void)PerlIO_flush(serr); } } #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. Use this function the same way you use 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) { char *message; HV *stash; GV *gv; CV *cv; SV *msv; STRLEN msglen; msv = vmess(pat, args); message = SvPV(msv, msglen); if (ckDEAD(err)) { #ifdef USE_5005THREADS DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message)); #endif /* USE_5005THREADS */ if (PL_diehook) { /* sv_2cv might call Perl_croak() */ SV *olddiehook = 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(); msg = newSVpvn(message, msglen); SvREADONLY_on(msg); SAVEFREESV(msg); PUSHSTACKi(PERLSI_DIEHOOK); PUSHMARK(sp); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; } } if (PL_in_eval) { PL_restartop = die_where(message, msglen); JMPENV_JUMP(3); } { PerlIO *serr = Perl_error_log; PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen); (void)PerlIO_flush(serr); } my_failure_exit(); } else { 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); SvREADONLY_on(msg); SAVEFREESV(msg); PUSHSTACKi(PERLSI_WARNHOOK); PUSHMARK(sp); XPUSHs(msg); PUTBACK; call_sv((SV*)cv, G_DISCARD); POPSTACK; LEAVE; return; } } { PerlIO *serr = Perl_error_log; PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen); #ifdef LEAKTEST DEBUG_L(*message == '!' ? (xstat(message[1]=='!' ? (message[2]=='!' ? 2 : 1) : 0) , 0) : 0); #endif (void)PerlIO_flush(serr); } } } /* 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' and EPOC's my_setenv() is in vms.c and epoc.c */ #if !defined(WIN32) && !defined(NETWARE) void Perl_my_setenv(pTHX_ char *nam, char *val) { #ifndef PERL_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 HTOV(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s; \ for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ u.c[i] = (n >> s) & 0xFF; \ } \ return u.value; \ } #define VTOH(name,type) \ type \ name (register type n) \ { \ union { \ type value; \ char c[sizeof(type)]; \ } u; \ register I32 i; \ register I32 s; \ u.value = n; \ n = 0; \ for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \ n += (u.c[i] & 0xFF) << s; \ } \ return n; \ } #if defined(HAS_HTOVS) && !defined(htovs) HTOV(htovs,short) #endif #if defined(HAS_HTOVL) && !defined(htovl) HTOV(htovl,long) #endif #if defined(HAS_VTOHS) && !defined(vtohs) VTOH(vtohs,short) #endif #if defined(HAS_VTOHL) && !defined(vtohl) VTOH(vtohl,long) #endif 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]); 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 _the_ pipe */ PerlLIO_close(p[THAT]); /* 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 !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 */ /* Close child's end of pipe */ PerlLIO_close(p[that]); 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]; } 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 = strNE(cmd,"-"); 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]); 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 PerlLIO_close(p[THAT]); 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]); } #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)); } 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 fork */ PerlLIO_close(p[that]); 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]; } 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) 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_5005THREADS) || 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_5005THREADS) || 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_5005THREADS) || 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; struct stat 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 Sighandler_t Perl_rsignal(pTHX_ int signo, Sighandler_t handler) { struct sigaction act, oact; act.sa_handler = handler; sigemptyset(&act.sa_mask); act.sa_flags = 0; #ifdef SA_RESTART #if defined(PERL_OLD_SIGNALS) act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ #endif #endif #ifdef SA_NOCLDWAIT 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; act.sa_handler = handler; sigemptyset(&act.sa_mask); act.sa_flags = 0; #ifdef SA_RESTART #if defined(PERL_OLD_SIGNALS) act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ #endif #endif #ifdef SA_NOCLDWAIT 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) { return sigaction(signo, save, (struct sigaction *)NULL); } #else /* !HAS_SIGACTION */ Sighandler_t Perl_rsignal(pTHX_ int signo, Sighandler_t handler) { 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; 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) { *save = PerlProc_signal(signo, handler); return (*save == SIG_ERR) ? -1 : 0; } int Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) { 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(int)]; 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(int)]; 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) 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,'/'); struct stat tmpstatbuf1; struct stat 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_5005THREADS) || 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_5005THREADS) || 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 USE_5005THREADS #ifdef FAKE_THREADS /* Very simplistic scheduler for now */ void schedule(void) { thr = thr->i.next_run; } void Perl_cond_init(pTHX_ perl_cond *cp) { *cp = 0; } void Perl_cond_signal(pTHX_ perl_cond *cp) { perl_os_thread t; perl_cond cond = *cp; if (!cond) return; t = cond->thread; /* Insert t in the runnable queue just ahead of us */ t->i.next_run = thr->i.next_run; thr->i.next_run->i.prev_run = t; t->i.prev_run = thr; thr->i.next_run = t; thr->i.wait_queue = 0; /* Remove from the wait queue */ *cp = cond->next; Safefree(cond); } void Perl_cond_broadcast(pTHX_ perl_cond *cp) { perl_os_thread t; perl_cond cond, cond_next; for (cond = *cp; cond; cond = cond_next) { t = cond->thread; /* Insert t in the runnable queue just ahead of us */ t->i.next_run = thr->i.next_run; thr->i.next_run->i.prev_run = t; t->i.prev_run = thr; thr->i.next_run = t; thr->i.wait_queue = 0; /* Remove from the wait queue */ cond_next = cond->next; Safefree(cond); } *cp = 0; } void Perl_cond_wait(pTHX_ perl_cond *cp) { perl_cond cond; if (thr->i.next_run == thr) Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread"); New(666, cond, 1, struct perl_wait_queue); cond->thread = thr; cond->next = *cp; *cp = cond; thr->i.wait_queue = cond; /* Remove ourselves from runnable queue */ thr->i.next_run->i.prev_run = thr->i.prev_run; thr->i.prev_run->i.next_run = thr->i.next_run; } #endif /* FAKE_THREADS */ MAGIC * Perl_condpair_magic(pTHX_ SV *sv) { MAGIC *mg; (void)SvUPGRADE(sv, SVt_PVMG); mg = mg_find(sv, PERL_MAGIC_mutex); if (!mg) { condpair_t *cp; New(53, cp, 1, condpair_t); MUTEX_INIT(&cp->mutex); COND_INIT(&cp->owner_cond); COND_INIT(&cp->cond); cp->owner = 0; LOCK_CRED_MUTEX; /* XXX need separate mutex? */ mg = mg_find(sv, PERL_MAGIC_mutex); if (mg) { /* someone else beat us to initialising it */ UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */ MUTEX_DESTROY(&cp->mutex); COND_DESTROY(&cp->owner_cond); COND_DESTROY(&cp->cond); Safefree(cp); } else { sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0); mg = SvMAGIC(sv); mg->mg_ptr = (char *)cp; mg->mg_len = sizeof(cp); UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */ DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log, "%p: condpair_magic %p\n", thr, sv))); } } return mg; } SV * Perl_sv_lock(pTHX_ SV *osv) { MAGIC *mg; SV *sv = osv; LOCK_SV_LOCK_MUTEX; if (SvROK(sv)) { sv = SvRV(sv); } mg = condpair_magic(sv); MUTEX_LOCK(MgMUTEXP(mg)); if (MgOWNER(mg) == thr) MUTEX_UNLOCK(MgMUTEXP(mg)); else { while (MgOWNER(mg)) COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg)); MgOWNER(mg) = thr; DEBUG_S(PerlIO_printf(Perl_debug_log, "0x%"UVxf": Perl_lock lock 0x%"UVxf"\n", PTR2UV(thr), PTR2UV(sv))); MUTEX_UNLOCK(MgMUTEXP(mg)); SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv); } UNLOCK_SV_LOCK_MUTEX; return sv; } /* * Make a new perl thread structure using t as a prototype. Some of the * fields for the new thread are copied from the prototype thread, t, * so t should not be running in perl at the time this function is * called. The use by ext/Thread/Thread.xs in core perl (where t is the * thread calling new_struct_thread) clearly satisfies this constraint. */ struct perl_thread * Perl_new_struct_thread(pTHX_ struct perl_thread *t) { #if !defined(PERL_IMPLICIT_CONTEXT) struct perl_thread *thr; #endif SV *sv; SV **svp; I32 i; sv = newSVpvn("", 0); SvGROW(sv, sizeof(struct perl_thread) + 1); SvCUR_set(sv, sizeof(struct perl_thread)); thr = (Thread) SvPVX(sv); #ifdef DEBUGGING memset(thr, 0xab, sizeof(struct perl_thread)); PL_markstack = 0; PL_scopestack = 0; PL_savestack = 0; PL_retstack = 0; PL_dirty = 0; PL_localizing = 0; Zero(&PL_hv_fetch_ent_mh, 1, HE); PL_efloatbuf = (char*)NULL; PL_efloatsize = 0; #else Zero(thr, 1, struct perl_thread); #endif thr->oursv = sv; init_stacks(); PL_curcop = &PL_compiling; thr->interp = t->interp; thr->cvcache = newHV(); thr->threadsv = newAV(); thr->specific = newAV(); thr->errsv = newSVpvn("", 0); thr->flags = THRf_R_JOINABLE; thr->thr_done = 0; MUTEX_INIT(&thr->mutex); JMPENV_BOOTSTRAP; PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */ PL_restartop = 0; PL_statname = NEWSV(66,0); PL_errors = newSVpvn("", 0); PL_maxscream = -1; PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp); PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags); PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start); PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string); PL_regfree = MEMBER_TO_FPTR(Perl_pregfree); PL_regindent = 0; PL_reginterp_cnt = 0; PL_lastscream = Nullsv; PL_screamfirst = 0; PL_screamnext = 0; PL_reg_start_tmp = 0; PL_reg_start_tmpl = 0; PL_reg_poscache = Nullch; PL_peepp = MEMBER_TO_FPTR(Perl_peep); /* parent thread's data needs to be locked while we make copy */ MUTEX_LOCK(&t->mutex); #ifdef PERL_FLEXIBLE_EXCEPTIONS PL_protect = t->Tprotect; #endif PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */ PL_defstash = t->Tdefstash; /* XXX maybe these should */ PL_curstash = t->Tcurstash; /* always be set to main? */ PL_tainted = t->Ttainted; PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */ PL_rs = newSVsv(t->Trs); PL_last_in_gv = Nullgv; PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv; PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv); PL_chopset = t->Tchopset; PL_bodytarget = newSVsv(t->Tbodytarget); PL_toptarget = newSVsv(t->Ttoptarget); if (t->Tformtarget == t->Ttoptarget) PL_formtarget = PL_toptarget; else PL_formtarget = PL_bodytarget; /* Initialise all per-thread SVs that the template thread used */ svp = AvARRAY(t->threadsv); for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) { if (*svp && *svp != &PL_sv_undef) { SV *sv = newSVsv(*svp); av_store(thr->threadsv, i, sv); sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1); DEBUG_S(PerlIO_printf(Perl_debug_log, "new_struct_thread: copied threadsv %"IVdf" %p->%p\n", (IV)i, t, thr)); } } thr->threadsvp = AvARRAY(thr->threadsv); MUTEX_LOCK(&PL_threads_mutex); PL_nthreads++; thr->tid = ++PL_threadnum; thr->next = t->next; thr->prev = t; t->next = thr; thr->next->prev = thr; MUTEX_UNLOCK(&PL_threads_mutex); /* done copying parent's state */ MUTEX_UNLOCK(&t->mutex); #ifdef HAVE_THREAD_INTERN Perl_init_thread_intern(thr); #endif /* HAVE_THREAD_INTERN */ return thr; } #endif /* USE_5005THREADS */ #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; #ifdef USE_5005THREADS case want_vtbl_mutex: result = &PL_vtbl_mutex; break; #endif 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; } return result; } I32 Perl_my_fflush_all(pTHX) { #if defined(FFLUSH_NULL) return PerlIO_flush(NULL); #else # if defined(HAS__FWALK) /* 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 *vile; I32 warn_type; 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 && io && IoTYPE(io) == IoTYPE_CLOSED) { vile = "closed"; warn_type = WARN_CLOSED; } else { vile = "unopened"; warn_type = WARN_UNOPENED; } if (gv && isGV(gv)) { SV *sv = sv_newmortal(); gv_efullname4(sv, gv, Nullch, FALSE); name = SvPVX(sv); } if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) { if (name && *name) Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for %sput", name, (op == OP_phoney_INPUT_ONLY ? "in" : "out")); else Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for %sput", (op == OP_phoney_INPUT_ONLY ? "in" : "out")); } else if (name && *name) { Perl_warner(aTHX_ 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_ warn_type, "\t(Are you trying to call %s%s on dirhandle %s?)\n", func, pars, name); } else { Perl_warner(aTHX_ warn_type, "%s%s on %s %s", func, pars, vile, type); if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) Perl_warner(aTHX_ 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 /* XXX struct tm on some systems (SunOS4/BSD) contains extra (non POSIX) * fields for which we don't have Configure support yet: * char *tm_zone; -- abbreviation of timezone name * long tm_gmtoff; -- offset from GMT in seconds * 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 is a temporary workaround to be removed once Configure * support is added and NETaa14816 is considered in full. * It does not address tzname aspects of NETaa14816. */ #ifdef HAS_GNULIBC # ifndef STRUCT_TM_HASZONE # define STRUCT_TM_HASZONE # endif #endif void Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */ { #ifdef STRUCT_TM_HASZONE 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); 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 struct stat 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"); } #endif return TRUE; #else return FALSE; #endif } /* =head1 SV Manipulation Functions =for apidoc new_vstring Returns a pointer to the next character after the parsed vstring, as well as updating the passed in sv. Function must be called like sv = NEWSV(92,5); s = new_vstring(s,sv); The sv must already be large enough to store the vstring passed in. =cut */ char * Perl_new_vstring(pTHX_ char *s, SV *sv) { char *pos = s; if (*pos == 'v') pos++; /* get past 'v' */ while (isDIGIT(*pos) || *pos == '_') pos++; if (!isALPHA(*pos)) { UV rev; U8 tmpbuf[UTF8_MAXLEN+1]; U8 *tmpend; if (*s == 'v') s++; /* get past 'v' */ sv_setpvn(sv, "", 0); for (;;) { rev = 0; { /* this is atoi() that tolerates underscores */ char *end = pos; UV mult = 1; if ( *(s-1) == '_') { mult = 10; } while (--end >= s) { UV orev; orev = rev; rev += (*end - '0') * mult; mult *= 10; if (orev > rev && ckWARN_d(WARN_OVERFLOW)) Perl_warner(aTHX_ WARN_OVERFLOW, "Integer overflow in decimal number"); } } /* Append native character for the rev point */ tmpend = uvchr_to_utf8(tmpbuf, rev); sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf); if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev))) SvUTF8_on(sv); if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1])) s = ++pos; else { s = pos; break; } while (isDIGIT(*pos) ) pos++; } SvPOK_on(sv); SvREADONLY_on(sv); } return s; } #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) # 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; } } 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; } } #endif /* !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) */ #ifdef HAS_SOCKETPAIR /* 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]) { return socketpair(family, type, protocol, fd); } #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) { }