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-rw-r--r--perly.c2046
1 files changed, 446 insertions, 1600 deletions
diff --git a/perly.c b/perly.c
index bedc75dfbb..5cde95237f 100644
--- a/perly.c
+++ b/perly.c
@@ -1,24 +1,32 @@
-char rcsid[] = "$Header: perly.c,v 2.0.1.1 88/06/28 16:36:49 root Exp $";
+char rcsid[] = "$Header: perly.c,v 3.0 89/10/18 15:22:21 lwall Locked $\nPatch level: ###\n";
/*
+ * Copyright (c) 1989, Larry Wall
+ *
+ * You may distribute under the terms of the GNU General Public License
+ * as specified in the README file that comes with the perl 3.0 kit.
+ *
* $Log: perly.c,v $
- * Revision 2.0.1.1 88/06/28 16:36:49 root
- * patch1: added DOSUID code
- *
- * Revision 2.0 88/06/05 00:09:56 root
- * Baseline version 2.0.
+ * Revision 3.0 89/10/18 15:22:21 lwall
+ * 3.0 baseline
*
*/
#include "EXTERN.h"
#include "perl.h"
#include "perly.h"
+#include "patchlevel.h"
-extern char *tokename[];
-extern int yychar;
+#ifdef IAMSUID
+#ifndef DOSUID
+#define DOSUID
+#endif
+#endif
-static int cmd_tosave();
-static int arg_tosave();
-static int spat_tosave();
+#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
+#ifdef DOSUID
+#undef DOSUID
+#endif
+#endif
main(argc,argv,env)
register int argc;
@@ -29,17 +37,37 @@ register char **env;
register char *s;
char *index(), *strcpy(), *getenv();
bool dosearch = FALSE;
-#ifdef DOSUID
char **origargv = argv;
+#ifdef DOSUID
char *validarg = "";
#endif
+#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
+#ifdef IAMSUID
+#undef IAMSUID
+ fatal("suidperl is no longer needed since the kernel can now execute\n\
+setuid perl scripts securely.\n");
+#endif
+#endif
+
uid = (int)getuid();
euid = (int)geteuid();
- linestr = str_new(80);
+ gid = (int)getgid();
+ egid = (int)getegid();
+ if (do_undump) {
+ do_undump = 0;
+ loop_ptr = 0; /* start label stack again */
+ goto just_doit;
+ }
+ (void)sprintf(index(rcsid,'#'), "%d\n", PATCHLEVEL);
+ linestr = Str_new(65,80);
str_nset(linestr,"",0);
- str = str_make(""); /* first used for -I flags */
+ str = str_make("",0); /* first used for -I flags */
+ curstash = defstash = hnew(0);
+ curstname = str_make("main",4);
+ stab_xhash(stabent("_main",TRUE)) = defstash;
incstab = aadd(stabent("INC",TRUE));
+ incstab->str_pok |= SP_MULTI;
for (argc--,argv++; argc; argc--,argv++) {
if (argv[0][0] != '-' || !argv[0][1])
break;
@@ -56,8 +84,20 @@ register char **env;
minus_a = TRUE;
s++;
goto reswitch;
+ case 'd':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -d allowed in setuid scripts");
+#endif
+ perldb = TRUE;
+ s++;
+ goto reswitch;
#ifdef DEBUGGING
case 'D':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -D allowed in setuid scripts");
+#endif
debug = atoi(s+1);
#ifdef YYDEBUG
yydebug = (debug & 1);
@@ -65,14 +105,18 @@ register char **env;
break;
#endif
case 'e':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -e allowed in setuid scripts");
+#endif
if (!e_fp) {
- e_tmpname = strcpy(safemalloc(sizeof(TMPPATH)),TMPPATH);
- mktemp(e_tmpname);
+ e_tmpname = savestr(TMPPATH);
+ (void)mktemp(e_tmpname);
e_fp = fopen(e_tmpname,"w");
}
if (argv[1])
fputs(argv[1],e_fp);
- putc('\n', e_fp);
+ (void)putc('\n', e_fp);
argc--,argv++;
break;
case 'i':
@@ -80,14 +124,18 @@ register char **env;
argvoutstab = stabent("ARGVOUT",TRUE);
break;
case 'I':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -I allowed in setuid scripts");
+#endif
str_cat(str,"-");
str_cat(str,s);
str_cat(str," ");
- if (s[1]) {
- apush(incstab->stab_array,str_make(s+1));
+ if (*++s) {
+ (void)apush(stab_array(incstab),str_make(s,0));
}
else {
- apush(incstab->stab_array,str_make(argv[1]));
+ (void)apush(stab_array(incstab),str_make(argv[1],0));
str_cat(str,argv[1]);
argc--,argv++;
str_cat(str," ");
@@ -102,10 +150,18 @@ register char **env;
s++;
goto reswitch;
case 'P':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -P allowed in setuid scripts");
+#endif
preprocess = TRUE;
s++;
goto reswitch;
case 's':
+#ifdef TAINT
+ if (euid != uid || egid != gid)
+ fatal("No -s allowed in setuid scripts");
+#endif
doswitches = TRUE;
s++;
goto reswitch;
@@ -113,12 +169,19 @@ register char **env;
dosearch = TRUE;
s++;
goto reswitch;
+ case 'u':
+ do_undump = TRUE;
+ s++;
+ goto reswitch;
case 'U':
unsafe = TRUE;
s++;
goto reswitch;
case 'v':
- version();
+ fputs(rcsid,stdout);
+ fputs("\nCopyright (c) 1989, Larry Wall\n\n\
+Perl may be copied only under the terms of the GNU General Public License,\n\
+a copy of which can be found with the Perl 3.0 distribution kit.\n",stdout);
exit(0);
case 'w':
dowarn = TRUE;
@@ -135,33 +198,34 @@ register char **env;
}
switch_end:
if (e_fp) {
- fclose(e_fp);
+ (void)fclose(e_fp);
argc++,argv--;
argv[0] = e_tmpname;
}
#ifndef PRIVLIB
#define PRIVLIB "/usr/local/lib/perl"
#endif
- apush(incstab->stab_array,str_make(PRIVLIB));
+ (void)apush(stab_array(incstab),str_make(PRIVLIB,0));
str_set(&str_no,No);
str_set(&str_yes,Yes);
- init_eval();
/* open script */
if (argv[0] == Nullch)
argv[0] = "-";
- if (dosearch && argv[0][0] != '/' && (s = getenv("PATH"))) {
+ if (dosearch && !index(argv[0], '/') && (s = getenv("PATH"))) {
char *xfound = Nullch, *xfailed = Nullch;
+ int len;
+ bufend = s + strlen(s);
while (*s) {
- s = cpytill(tokenbuf,s,':');
+ s = cpytill(tokenbuf,s,bufend,':',&len);
if (*s)
s++;
- if (tokenbuf[0])
- strcat(tokenbuf,"/");
- strcat(tokenbuf,argv[0]);
+ if (len)
+ (void)strcat(tokenbuf+len,"/");
+ (void)strcat(tokenbuf+len,argv[0]);
#ifdef DEBUGGING
if (debug & 1)
fprintf(stderr,"Looking for %s\n",tokenbuf);
@@ -169,7 +233,7 @@ register char **env;
if (stat(tokenbuf,&statbuf) < 0) /* not there? */
continue;
if ((statbuf.st_mode & S_IFMT) == S_IFREG
- && cando(S_IREAD,TRUE) && cando(S_IEXEC,TRUE)) {
+ && cando(S_IREAD,TRUE,&statbuf) && cando(S_IEXEC,TRUE,&statbuf)) {
xfound = tokenbuf; /* bingo! */
break;
}
@@ -177,11 +241,14 @@ register char **env;
xfailed = savestr(tokenbuf);
}
if (!xfound)
- fatal("Can't execute %s", xfailed);
+ fatal("Can't execute %s", xfailed ? xfailed : argv[0] );
if (xfailed)
- safefree(xfailed);
+ Safefree(xfailed);
argv[0] = savestr(xfound);
}
+
+ pidstatary = anew(Nullstab); /* for remembering popen pids, status */
+
filename = savestr(argv[0]);
origfilename = savestr(filename);
if (strEQ(filename,"-"))
@@ -189,7 +256,7 @@ register char **env;
if (preprocess) {
str_cat(str,"-I");
str_cat(str,PRIVLIB);
- sprintf(buf, "\
+ (void)sprintf(buf, "\
/bin/sed -e '/^[^#]/b' \
-e '/^#[ ]*include[ ]/b' \
-e '/^#[ ]*define[ ]/b' \
@@ -201,27 +268,40 @@ register char **env;
-e 's/^#.*//' \
%s | %s -C %s %s",
argv[0], CPPSTDIN, str_get(str), CPPMINUS);
-#ifdef IAMSUID
+#ifdef IAMSUID /* actually, this is caught earlier */
if (euid != uid && !euid) /* if running suidperl */
- seteuid(uid); /* musn't stay setuid root */
+#ifdef SETEUID
+ (void)seteuid(uid); /* musn't stay setuid root */
+#else
+#ifdef SETREUID
+ (void)setreuid(-1, uid);
+#else
+ setuid(uid);
#endif
- rsfp = popen(buf,"r");
+#endif
+#endif /* IAMSUID */
+ rsfp = mypopen(buf,"r");
}
else if (!*argv[0])
rsfp = stdin;
else
rsfp = fopen(argv[0],"r");
if (rsfp == Nullfp) {
+ extern char *sys_errlist[];
+ extern int errno;
+
#ifdef DOSUID
-#ifndef IAMSUID
+#ifndef IAMSUID /* in case script is not readable before setuid */
if (euid && stat(filename,&statbuf) >= 0 &&
statbuf.st_mode & (S_ISUID|S_ISGID)) {
- execvp("suidperl", origargv); /* try again */
+ (void)sprintf(buf, "%s/%s", BIN, "suidperl");
+ execv(buf, origargv); /* try again */
fatal("Can't do setuid\n");
}
#endif
#endif
- fatal("Perl script \"%s\" doesn't seem to exist",filename);
+ fatal("Can't open perl script \"%s\": %s\n",
+ filename, sys_errlist[errno]);
}
str_free(str); /* free -I directories */
@@ -242,17 +322,72 @@ register char **env;
* DOSUID must be defined in both perl and suidperl, and IAMSUID must
* be defined in suidperl only. suidperl must be setuid root. The
* Configure script will set this up for you if you want it.
+ *
+ * There is also the possibility of have a script which is running
+ * set-id due to a C wrapper. We want to do the TAINT checks
+ * on these set-id scripts, but don't want to have the overhead of
+ * them in normal perl, and can't use suidperl because it will lose
+ * the effective uid info, so we have an additional non-setuid root
+ * version called taintperl that just does the TAINT checks.
*/
+
#ifdef DOSUID
if (fstat(fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
fatal("Can't stat script \"%s\"",filename);
if (statbuf.st_mode & (S_ISUID|S_ISGID)) {
int len;
+#ifdef IAMSUID
+#ifndef SETREUID
+ /* On this access check to make sure the directories are readable,
+ * there is actually a small window that the user could use to make
+ * filename point to an accessible directory. So there is a faint
+ * chance that someone could execute a setuid script down in a
+ * non-accessible directory. I don't know what to do about that.
+ * But I don't think it's too important. The manual lies when
+ * it says access() is useful in setuid programs.
+ */
if (access(filename,1)) /* as a double check */
fatal("Permission denied");
+#else
+ /* If we can swap euid and uid, then we can determine access rights
+ * with a simple stat of the file, and then compare device and
+ * inode to make sure we did stat() on the same file we opened.
+ * Then we just have to make sure he or she can execute it.
+ */
+ {
+ struct stat tmpstatbuf;
+
+ if (setreuid(euid,uid) < 0 || getuid() != euid || geteuid() != uid)
+ fatal("Can't swap uid and euid"); /* really paranoid */
+ if (stat(filename,&tmpstatbuf) < 0) /* testing full pathname here */
+ fatal("Permission denied");
+ if (tmpstatbuf.st_dev != statbuf.st_dev ||
+ tmpstatbuf.st_ino != statbuf.st_ino) {
+ (void)fclose(rsfp);
+ if (rsfp = mypopen("/bin/mail root","w")) { /* heh, heh */
+ fprintf(rsfp,
+"User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\
+(Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n",
+ uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino,
+ statbuf.st_dev, statbuf.st_ino,
+ filename, statbuf.st_uid, statbuf.st_gid);
+ (void)mypclose(rsfp);
+ }
+ fatal("Permission denied\n");
+ }
+ if (setreuid(uid,euid) < 0 || getuid() != uid || geteuid() != euid)
+ fatal("Can't reswap uid and euid");
+ if (!cando(S_IEXEC,FALSE,&statbuf)) /* can real uid exec? */
+ fatal("Permission denied\n");
+ }
+#endif /* SETREUID */
+#endif /* IAMSUID */
+
if ((statbuf.st_mode & S_IFMT) != S_IFREG)
fatal("Permission denied");
+ if ((statbuf.st_mode >> 6) & S_IWRITE)
+ fatal("Setuid/gid script is writable by world");
doswitches = FALSE; /* -s is insecure in suid */
line++;
if (fgets(tokenbuf,sizeof tokenbuf, rsfp) == Nullch ||
@@ -261,7 +396,7 @@ register char **env;
for (s = tokenbuf+2; !isspace(*s); s++) ;
if (strnNE(s-4,"perl",4)) /* sanity check */
fatal("Not a perl script");
- while (*s && isspace(*s)) s++;
+ while (*s == ' ' || *s == '\t') s++;
/*
* #! arg must be what we saw above. They can invoke it by
* mentioning suidperl explicitly, but they may not add any strange
@@ -270,24 +405,59 @@ register char **env;
len = strlen(validarg);
if (strEQ(validarg," PHOOEY ") ||
strnNE(s,validarg,len) || !isspace(s[len]))
- fatal("Arg must be \"%s\"\n",s);
+ fatal("Args must match #! line");
+
+#ifndef IAMSUID
+ if (euid != uid && (statbuf.st_mode & S_ISUID) &&
+ euid == statbuf.st_uid)
+ if (!do_undump)
+ fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
+FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
+#endif /* IAMSUID */
if (euid) { /* oops, we're not the setuid root perl */
- fclose(rsfp);
+ (void)fclose(rsfp);
#ifndef IAMSUID
- execvp("suidperl", origargv); /* try again */
+ (void)sprintf(buf, "%s/%s", BIN, "suidperl");
+ execv(buf, origargv); /* try again */
#endif
fatal("Can't do setuid\n");
}
- if (statbuf.st_mode & S_ISUID && statbuf.st_uid != euid)
- seteuid(statbuf.st_uid); /* all that for this */
- else if (uid) /* oops, mustn't run as root */
- seteuid(uid);
if (statbuf.st_mode & S_ISGID && statbuf.st_gid != getegid())
- setegid(statbuf.st_gid);
+#ifdef SETEGID
+ (void)setegid(statbuf.st_gid);
+#else
+#ifdef SETREGID
+ (void)setregid((GIDTYPE)-1,statbuf.st_gid);
+#else
+ setgid(statbuf.st_gid);
+#endif
+#endif
+ if (statbuf.st_mode & S_ISUID) {
+ if (statbuf.st_uid != euid)
+#ifdef SETEUID
+ (void)seteuid(statbuf.st_uid); /* all that for this */
+#else
+#ifdef SETREUID
+ (void)setreuid((UIDTYPE)-1,statbuf.st_uid);
+#else
+ setuid(statbuf.st_uid);
+#endif
+#endif
+ }
+ else if (uid) /* oops, mustn't run as root */
+#ifdef SETEUID
+ (void)seteuid((UIDTYPE)uid);
+#else
+#ifdef SETREUID
+ (void)setreuid((UIDTYPE)-1,(UIDTYPE)uid);
+#else
+ setuid((UIDTYPE)uid);
+#endif
+#endif
euid = (int)geteuid();
- if (!cando(S_IEXEC,TRUE))
+ if (!cando(S_IEXEC,TRUE,&statbuf))
fatal("Permission denied\n"); /* they can't do this */
}
#ifdef IAMSUID
@@ -295,30 +465,152 @@ register char **env;
fatal("-P not allowed for setuid/setgid script\n");
else
fatal("Script is not setuid/setgid in suidperl\n");
+#else
+#ifndef TAINT /* we aren't taintperl or suidperl */
+ /* script has a wrapper--can't run suidperl or we lose euid */
+ else if (euid != uid || egid != gid) {
+ (void)fclose(rsfp);
+ (void)sprintf(buf, "%s/%s", BIN, "taintperl");
+ execv(buf, origargv); /* try again */
+ fatal("Can't run setuid script with taint checks");
+ }
+#endif /* TAINT */
#endif /* IAMSUID */
+#else /* !DOSUID */
+#ifndef TAINT /* we aren't taintperl or suidperl */
+ if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
+#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
+ fstat(fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
+ if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
+ ||
+ (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
+ )
+ if (!do_undump)
+ fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
+FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
+#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
+ /* not set-id, must be wrapped */
+ (void)fclose(rsfp);
+ (void)sprintf(buf, "%s/%s", BIN, "taintperl");
+ execv(buf, origargv); /* try again */
+ fatal("Can't run setuid script with taint checks");
+ }
+#endif /* TAINT */
#endif /* DOSUID */
defstab = stabent("_",TRUE);
+ if (perldb) {
+ debstash = hnew(0);
+ stab_xhash(stabent("_DB",TRUE)) = debstash;
+ curstash = debstash;
+ lineary = stab_xarray(aadd((tmpstab = stabent("line",TRUE))));
+ tmpstab->str_pok |= SP_MULTI;
+ subname = str_make("main",4);
+ DBstab = stabent("DB",TRUE);
+ DBstab->str_pok |= SP_MULTI;
+ DBsub = hadd(tmpstab = stabent("sub",TRUE));
+ tmpstab->str_pok |= SP_MULTI;
+ DBsingle = stab_val((tmpstab = stabent("single",TRUE)));
+ tmpstab->str_pok |= SP_MULTI;
+ curstash = defstash;
+ }
+
/* init tokener */
- bufptr = str_get(linestr);
+ bufend = bufptr = str_get(linestr);
+
+ savestack = anew(Nullstab); /* for saving non-local values */
+ stack = anew(Nullstab); /* for saving non-local values */
+ stack->ary_flags = 0; /* not a real array */
- /* now parse the report spec */
+ /* now parse the script */
- if (yyparse())
+ error_count = 0;
+ if (yyparse() || error_count)
fatal("Execution aborted due to compilation errors.\n");
- if (dowarn) {
- stab_check('A','Z');
- stab_check('a','z');
- }
+ New(50,loop_stack,128,struct loop);
+ New(51,debname,128,char);
+ New(52,debdelim,128,char);
+ curstash = defstash;
preprocess = FALSE;
if (e_fp) {
e_fp = Nullfp;
- UNLINK(e_tmpname);
+ (void)UNLINK(e_tmpname);
}
+
+ /* initialize everything that won't change if we undump */
+
+ if (sigstab = stabent("SIG",allstabs)) {
+ sigstab->str_pok |= SP_MULTI;
+ (void)hadd(sigstab);
+ }
+
+ magicalize("!#?^~=-%0123456789.+&*()<>,\\/[|`':");
+
+ amperstab = stabent("&",allstabs);
+ leftstab = stabent("`",allstabs);
+ rightstab = stabent("'",allstabs);
+ sawampersand = (amperstab || leftstab || rightstab);
+ if (tmpstab = stabent(":",allstabs))
+ str_set(STAB_STR(tmpstab),chopset);
+
+ /* these aren't necessarily magical */
+ if (tmpstab = stabent(";",allstabs))
+ str_set(STAB_STR(tmpstab),"\034");
+#ifdef TAINT
+ tainted = 1;
+#endif
+ if (tmpstab = stabent("0",allstabs))
+ str_set(STAB_STR(tmpstab),origfilename);
+#ifdef TAINT
+ tainted = 0;
+#endif
+ if (tmpstab = stabent("]",allstabs))
+ str_set(STAB_STR(tmpstab),rcsid);
+ str_nset(stab_val(stabent("\"", TRUE)), " ", 1);
+
+ stdinstab = stabent("STDIN",TRUE);
+ stdinstab->str_pok |= SP_MULTI;
+ stab_io(stdinstab) = stio_new();
+ stab_io(stdinstab)->ifp = stdin;
+ tmpstab = stabent("stdin",TRUE);
+ stab_io(tmpstab) = stab_io(stdinstab);
+ tmpstab->str_pok |= SP_MULTI;
+
+ tmpstab = stabent("STDOUT",TRUE);
+ tmpstab->str_pok |= SP_MULTI;
+ stab_io(tmpstab) = stio_new();
+ stab_io(tmpstab)->ofp = stab_io(tmpstab)->ifp = stdout;
+ defoutstab = tmpstab;
+ tmpstab = stabent("stdout",TRUE);
+ stab_io(tmpstab) = stab_io(defoutstab);
+ tmpstab->str_pok |= SP_MULTI;
+
+ curoutstab = stabent("STDERR",TRUE);
+ curoutstab->str_pok |= SP_MULTI;
+ stab_io(curoutstab) = stio_new();
+ stab_io(curoutstab)->ofp = stab_io(curoutstab)->ifp = stderr;
+ tmpstab = stabent("stderr",TRUE);
+ stab_io(tmpstab) = stab_io(curoutstab);
+ tmpstab->str_pok |= SP_MULTI;
+ curoutstab = defoutstab; /* switch back to STDOUT */
+
+ statname = Str_new(66,0); /* last filename we did stat on */
+
+ perldb = FALSE; /* don't try to instrument evals */
+
+ if (dowarn) {
+ stab_check('A','Z');
+ stab_check('a','z');
+ }
+
+ if (do_undump)
+ abort();
+
+ just_doit: /* come here if running an undumped a.out */
argc--,argv++; /* skip name of script */
if (doswitches) {
for (; argc > 0 && **argv == '-'; argc--,argv++) {
@@ -326,66 +618,54 @@ register char **env;
argc--,argv++;
break;
}
- str_numset(stabent(argv[0]+1,TRUE)->stab_val,(double)1.0);
+ str_numset(stab_val(stabent(argv[0]+1,TRUE)),(double)1.0);
}
}
+#ifdef TAINT
+ tainted = 1;
+#endif
if (argvstab = stabent("ARGV",allstabs)) {
- aadd(argvstab);
+ argvstab->str_pok |= SP_MULTI;
+ (void)aadd(argvstab);
for (; argc > 0; argc--,argv++) {
- apush(argvstab->stab_array,str_make(argv[0]));
+ (void)apush(stab_array(argvstab),str_make(argv[0],0));
}
}
+#ifdef TAINT
+ (void) stabent("ENV",TRUE); /* must test PATH and IFS */
+#endif
if (envstab = stabent("ENV",allstabs)) {
- hadd(envstab);
+ envstab->str_pok |= SP_MULTI;
+ (void)hadd(envstab);
for (; *env; env++) {
if (!(s = index(*env,'=')))
continue;
*s++ = '\0';
- str = str_make(s);
- str->str_link.str_magic = envstab;
- hstore(envstab->stab_hash,*env,str);
- *--s = '=';
+ str = str_make(s--,0);
+ str_magic(str, envstab, 'E', *env, s - *env);
+ (void)hstore(stab_hash(envstab), *env, s - *env, str, 0);
+ *s = '=';
}
}
- if (sigstab = stabent("SIG",allstabs))
- hadd(sigstab);
-
- magicalize("!#?^~=-%0123456789.+&*()<>,\\/[|");
-
- sawampersand = (stabent("&",FALSE) != Nullstab);
- if (tmpstab = stabent("0",allstabs))
- str_set(STAB_STR(tmpstab),origfilename);
+#ifdef TAINT
+ tainted = 0;
+#endif
if (tmpstab = stabent("$",allstabs))
str_numset(STAB_STR(tmpstab),(double)getpid());
- tmpstab = stabent("stdin",TRUE);
- tmpstab->stab_io = stio_new();
- tmpstab->stab_io->fp = stdin;
-
- tmpstab = stabent("stdout",TRUE);
- tmpstab->stab_io = stio_new();
- tmpstab->stab_io->fp = stdout;
- defoutstab = tmpstab;
- curoutstab = tmpstab;
-
- tmpstab = stabent("stderr",TRUE);
- tmpstab->stab_io = stio_new();
- tmpstab->stab_io->fp = stderr;
-
- savestack = anew(Nullstab); /* for saving non-local values */
-
- setjmp(top_env); /* sets goto_targ on longjump */
+ if (setjmp(top_env)) /* sets goto_targ on longjump */
+ loop_ptr = 0; /* start label stack again */
#ifdef DEBUGGING
if (debug & 1024)
- dump_cmd(main_root,Nullcmd);
+ dump_all();
if (debug)
fprintf(stderr,"\nEXECUTING...\n\n");
#endif
/* do it */
- (void) cmd_exec(main_root);
+ (void) cmd_exec(main_root,G_SCALAR,-1);
if (goto_targ)
fatal("Can't find label \"%s\"--aborting",goto_targ);
@@ -402,1305 +682,23 @@ register char *list;
sym[1] = '\0';
while (*sym = *list++) {
if (stab = stabent(sym,allstabs)) {
- stab->stab_flags = SF_VMAGIC;
- stab->stab_val->str_link.str_magic = stab;
- }
- }
-}
-
-ARG *
-make_split(stab,arg)
-register STAB *stab;
-register ARG *arg;
-{
- register SPAT *spat = (SPAT *) safemalloc(sizeof (SPAT));
-
- if (arg->arg_type != O_MATCH) {
- spat = (SPAT *) safemalloc(sizeof (SPAT));
- bzero((char *)spat, sizeof(SPAT));
- spat->spat_next = spat_root; /* link into spat list */
- spat_root = spat;
-
- spat->spat_runtime = arg;
- arg = make_match(O_MATCH,stab2arg(A_STAB,defstab),spat);
- }
- arg->arg_type = O_SPLIT;
- spat = arg[2].arg_ptr.arg_spat;
- spat->spat_repl = stab2arg(A_STAB,aadd(stab));
- if (spat->spat_short) { /* exact match can bypass regexec() */
- if (!((spat->spat_flags & SPAT_SCANFIRST) &&
- (spat->spat_flags & SPAT_ALL) )) {
- str_free(spat->spat_short);
- spat->spat_short = Nullstr;
- }
- }
- return arg;
-}
-
-SUBR *
-make_sub(name,cmd)
-char *name;
-CMD *cmd;
-{
- register SUBR *sub = (SUBR *) safemalloc(sizeof (SUBR));
- STAB *stab = stabent(name,TRUE);
-
- if (stab->stab_sub) {
- if (dowarn) {
- line_t oldline = line;
-
- if (cmd)
- line = cmd->c_line;
- warn("Subroutine %s redefined",name);
- line = oldline;
- }
- cmd_free(stab->stab_sub->cmd);
- afree(stab->stab_sub->tosave);
- safefree((char*)stab->stab_sub);
- }
- bzero((char *)sub, sizeof(SUBR));
- sub->cmd = cmd;
- sub->filename = filename;
- tosave = anew(Nullstab);
- tosave->ary_fill = 0; /* make 1 based */
- cmd_tosave(cmd); /* this builds the tosave array */
- sub->tosave = tosave;
- stab->stab_sub = sub;
-}
-
-CMD *
-block_head(tail)
-register CMD *tail;
-{
- if (tail == Nullcmd) {
- return tail;
- }
- return tail->c_head;
-}
-
-CMD *
-append_line(head,tail)
-register CMD *head;
-register CMD *tail;
-{
- if (tail == Nullcmd)
- return head;
- if (!tail->c_head) /* make sure tail is well formed */
- tail->c_head = tail;
- if (head != Nullcmd) {
- tail = tail->c_head; /* get to start of tail list */
- if (!head->c_head)
- head->c_head = head; /* start a new head list */
- while (head->c_next) {
- head->c_next->c_head = head->c_head;
- head = head->c_next; /* get to end of head list */
- }
- head->c_next = tail; /* link to end of old list */
- tail->c_head = head->c_head; /* propagate head pointer */
- }
- while (tail->c_next) {
- tail->c_next->c_head = tail->c_head;
- tail = tail->c_next;
- }
- return tail;
-}
-
-CMD *
-make_acmd(type,stab,cond,arg)
-int type;
-STAB *stab;
-ARG *cond;
-ARG *arg;
-{
- register CMD *cmd = (CMD *) safemalloc(sizeof (CMD));
-
- bzero((char *)cmd, sizeof(CMD));
- cmd->c_type = type;
- cmd->ucmd.acmd.ac_stab = stab;
- cmd->ucmd.acmd.ac_expr = arg;
- cmd->c_expr = cond;
- if (cond) {
- opt_arg(cmd,1,1);
- cmd->c_flags |= CF_COND;
- }
- if (cmdline != NOLINE) {
- cmd->c_line = cmdline;
- cmdline = NOLINE;
- }
- cmd->c_file = filename;
- return cmd;
-}
-
-CMD *
-make_ccmd(type,arg,cblock)
-int type;
-register ARG *arg;
-struct compcmd cblock;
-{
- register CMD *cmd = (CMD *) safemalloc(sizeof (CMD));
-
- bzero((char *)cmd, sizeof(CMD));
- cmd->c_type = type;
- cmd->c_expr = arg;
- cmd->ucmd.ccmd.cc_true = cblock.comp_true;
- cmd->ucmd.ccmd.cc_alt = cblock.comp_alt;
- if (arg) {
- opt_arg(cmd,1,0);
- cmd->c_flags |= CF_COND;
- }
- if (cmdline != NOLINE) {
- cmd->c_line = cmdline;
- cmdline = NOLINE;
- }
- return cmd;
-}
-
-void
-opt_arg(cmd,fliporflop,acmd)
-register CMD *cmd;
-int fliporflop;
-int acmd;
-{
- register ARG *arg;
- int opt = CFT_EVAL;
- int sure = 0;
- ARG *arg2;
- char *tmps; /* for True macro */
- int context = 0; /* 0 = normal, 1 = before &&, 2 = before || */
- int flp = fliporflop;
-
- if (!cmd)
- return;
- arg = cmd->c_expr;
-
- /* Can we turn && and || into if and unless? */
-
- if (acmd && !cmd->ucmd.acmd.ac_expr &&
- (arg->arg_type == O_AND || arg->arg_type == O_OR) ) {
- dehoist(arg,1);
- dehoist(arg,2);
- cmd->ucmd.acmd.ac_expr = arg[2].arg_ptr.arg_arg;
- cmd->c_expr = arg[1].arg_ptr.arg_arg;
- if (arg->arg_type == O_OR)
- cmd->c_flags ^= CF_INVERT; /* || is like unless */
- arg->arg_len = 0;
- arg_free(arg);
- arg = cmd->c_expr;
- }
-
- /* Turn "if (!expr)" into "unless (expr)" */
-
- while (arg->arg_type == O_NOT) {
- dehoist(arg,1);
- cmd->c_flags ^= CF_INVERT; /* flip sense of cmd */
- cmd->c_expr = arg[1].arg_ptr.arg_arg; /* hoist the rest of expr */
- free_arg(arg);
- arg = cmd->c_expr; /* here we go again */
- }
-
- if (!arg->arg_len) { /* sanity check */
- cmd->c_flags |= opt;
- return;
- }
-
- /* for "cond .. cond" we set up for the initial check */
-
- if (arg->arg_type == O_FLIP)
- context |= 4;
-
- /* for "cond && expr" and "cond || expr" we can ignore expr, sort of */
-
- if (arg->arg_type == O_AND)
- context |= 1;
- else if (arg->arg_type == O_OR)
- context |= 2;
- if (context && arg[flp].arg_type == A_EXPR) {
- arg = arg[flp].arg_ptr.arg_arg;
- flp = 1;
- }
-
- if (arg[flp].arg_flags & (AF_PRE|AF_POST)) {
- cmd->c_flags |= opt;
- return; /* side effect, can't optimize */
- }
-
- if (arg->arg_type == O_ITEM || arg->arg_type == O_FLIP ||
- arg->arg_type == O_AND || arg->arg_type == O_OR) {
- if (arg[flp].arg_type == A_SINGLE) {
- opt = (str_true(arg[flp].arg_ptr.arg_str) ? CFT_TRUE : CFT_FALSE);
- cmd->c_short = arg[flp].arg_ptr.arg_str;
- goto literal;
- }
- else if (arg[flp].arg_type == A_STAB || arg[flp].arg_type == A_LVAL) {
- cmd->c_stab = arg[flp].arg_ptr.arg_stab;
- opt = CFT_REG;
- literal:
- if (!context) { /* no && or ||? */
- free_arg(arg);
- cmd->c_expr = Nullarg;
- }
- if (!(context & 1))
- cmd->c_flags |= CF_EQSURE;
- if (!(context & 2))
- cmd->c_flags |= CF_NESURE;
- }
- }
- else if (arg->arg_type == O_MATCH || arg->arg_type == O_SUBST ||
- arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST) {
- if ((arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) &&
- arg[2].arg_type == A_SPAT &&
- arg[2].arg_ptr.arg_spat->spat_short ) {
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- cmd->c_short = arg[2].arg_ptr.arg_spat->spat_short;
- cmd->c_slen = arg[2].arg_ptr.arg_spat->spat_slen;
- if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_ALL &&
- !(arg[2].arg_ptr.arg_spat->spat_flags & SPAT_ONCE) &&
- (arg->arg_type == O_MATCH || arg->arg_type == O_NMATCH) )
- sure |= CF_EQSURE; /* (SUBST must be forced even */
- /* if we know it will work.) */
- arg[2].arg_ptr.arg_spat->spat_short = Nullstr;
- arg[2].arg_ptr.arg_spat->spat_slen = 0; /* only one chk */
- sure |= CF_NESURE; /* normally only sure if it fails */
- if (arg->arg_type == O_NMATCH || arg->arg_type == O_NSUBST)
- cmd->c_flags |= CF_FIRSTNEG;
- if (context & 1) { /* only sure if thing is false */
- if (cmd->c_flags & CF_FIRSTNEG)
- sure &= ~CF_NESURE;
- else
- sure &= ~CF_EQSURE;
- }
- else if (context & 2) { /* only sure if thing is true */
- if (cmd->c_flags & CF_FIRSTNEG)
- sure &= ~CF_EQSURE;
- else
- sure &= ~CF_NESURE;
- }
- if (sure & (CF_EQSURE|CF_NESURE)) { /* if we know anything*/
- if (arg[2].arg_ptr.arg_spat->spat_flags & SPAT_SCANFIRST)
- opt = CFT_SCAN;
- else
- opt = CFT_ANCHOR;
- if (sure == (CF_EQSURE|CF_NESURE) /* really sure? */
- && arg->arg_type == O_MATCH
- && context & 4
- && fliporflop == 1) {
- spat_free(arg[2].arg_ptr.arg_spat);
- arg[2].arg_ptr.arg_spat = Nullspat; /* don't do twice */
- }
- cmd->c_flags |= sure;
- }
- }
- }
- else if (arg->arg_type == O_SEQ || arg->arg_type == O_SNE ||
- arg->arg_type == O_SLT || arg->arg_type == O_SGT) {
- if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) {
- if (arg[2].arg_type == A_SINGLE) {
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- cmd->c_short = arg[2].arg_ptr.arg_str;
- cmd->c_slen = 30000;
- switch (arg->arg_type) {
- case O_SLT: case O_SGT:
- sure |= CF_EQSURE;
- cmd->c_flags |= CF_FIRSTNEG;
- break;
- case O_SNE:
- cmd->c_flags |= CF_FIRSTNEG;
- /* FALL THROUGH */
- case O_SEQ:
- sure |= CF_NESURE|CF_EQSURE;
- break;
- }
- if (context & 1) { /* only sure if thing is false */
- if (cmd->c_flags & CF_FIRSTNEG)
- sure &= ~CF_NESURE;
- else
- sure &= ~CF_EQSURE;
- }
- else if (context & 2) { /* only sure if thing is true */
- if (cmd->c_flags & CF_FIRSTNEG)
- sure &= ~CF_EQSURE;
- else
- sure &= ~CF_NESURE;
- }
- if (sure & (CF_EQSURE|CF_NESURE)) {
- opt = CFT_STROP;
- cmd->c_flags |= sure;
- }
- }
- }
- }
- else if (arg->arg_type == O_EQ || arg->arg_type == O_NE ||
- arg->arg_type == O_LE || arg->arg_type == O_GE ||
- arg->arg_type == O_LT || arg->arg_type == O_GT) {
- if (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) {
- if (arg[2].arg_type == A_SINGLE) {
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- cmd->c_short = str_nmake(str_gnum(arg[2].arg_ptr.arg_str));
- cmd->c_slen = arg->arg_type;
- sure |= CF_NESURE|CF_EQSURE;
- if (context & 1) { /* only sure if thing is false */
- sure &= ~CF_EQSURE;
- }
- else if (context & 2) { /* only sure if thing is true */
- sure &= ~CF_NESURE;
- }
- if (sure & (CF_EQSURE|CF_NESURE)) {
- opt = CFT_NUMOP;
- cmd->c_flags |= sure;
- }
- }
- }
- }
- else if (arg->arg_type == O_ASSIGN &&
- (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) &&
- arg[1].arg_ptr.arg_stab == defstab &&
- arg[2].arg_type == A_EXPR ) {
- arg2 = arg[2].arg_ptr.arg_arg;
- if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) {
- opt = CFT_GETS;
- cmd->c_stab = arg2[1].arg_ptr.arg_stab;
- if (!(arg2[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV)) {
- free_arg(arg2);
- free_arg(arg);
- cmd->c_expr = Nullarg;
- }
- }
- }
- else if (arg->arg_type == O_CHOP &&
- (arg[1].arg_type == A_STAB || arg[1].arg_type == A_LVAL) ) {
- opt = CFT_CHOP;
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- free_arg(arg);
- cmd->c_expr = Nullarg;
- }
- if (context & 4)
- opt |= CF_FLIP;
- cmd->c_flags |= opt;
-
- if (cmd->c_flags & CF_FLIP) {
- if (fliporflop == 1) {
- arg = cmd->c_expr; /* get back to O_FLIP arg */
- arg[3].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD));
- bcopy((char *)cmd, (char *)arg[3].arg_ptr.arg_cmd, sizeof(CMD));
- arg[4].arg_ptr.arg_cmd = (CMD*)safemalloc(sizeof(CMD));
- bcopy((char *)cmd, (char *)arg[4].arg_ptr.arg_cmd, sizeof(CMD));
- opt_arg(arg[4].arg_ptr.arg_cmd,2,acmd);
- arg->arg_len = 2; /* this is a lie */
- }
- else {
- if ((opt & CF_OPTIMIZE) == CFT_EVAL)
- cmd->c_flags = (cmd->c_flags & ~CF_OPTIMIZE) | CFT_UNFLIP;
- }
- }
-}
-
-ARG *
-mod_match(type,left,pat)
-register ARG *left;
-register ARG *pat;
-{
-
- register SPAT *spat;
- register ARG *newarg;
-
- if ((pat->arg_type == O_MATCH ||
- pat->arg_type == O_SUBST ||
- pat->arg_type == O_TRANS ||
- pat->arg_type == O_SPLIT
- ) &&
- pat[1].arg_ptr.arg_stab == defstab ) {
- switch (pat->arg_type) {
- case O_MATCH:
- newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH,
- pat->arg_len,
- left,Nullarg,Nullarg,0);
- break;
- case O_SUBST:
- newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST,
- pat->arg_len,
- left,Nullarg,Nullarg,0));
- break;
- case O_TRANS:
- newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS,
- pat->arg_len,
- left,Nullarg,Nullarg,0));
- break;
- case O_SPLIT:
- newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT,
- pat->arg_len,
- left,Nullarg,Nullarg,0);
- break;
- }
- if (pat->arg_len >= 2) {
- newarg[2].arg_type = pat[2].arg_type;
- newarg[2].arg_ptr = pat[2].arg_ptr;
- newarg[2].arg_flags = pat[2].arg_flags;
- if (pat->arg_len >= 3) {
- newarg[3].arg_type = pat[3].arg_type;
- newarg[3].arg_ptr = pat[3].arg_ptr;
- newarg[3].arg_flags = pat[3].arg_flags;
- }
- }
- safefree((char*)pat);
- }
- else {
- spat = (SPAT *) safemalloc(sizeof (SPAT));
- bzero((char *)spat, sizeof(SPAT));
- spat->spat_next = spat_root; /* link into spat list */
- spat_root = spat;
-
- spat->spat_runtime = pat;
- newarg = make_op(type,2,left,Nullarg,Nullarg,0);
- newarg[2].arg_type = A_SPAT;
- newarg[2].arg_ptr.arg_spat = spat;
- newarg[2].arg_flags = AF_SPECIAL;
- }
-
- return newarg;
-}
-
-CMD *
-add_label(lbl,cmd)
-char *lbl;
-register CMD *cmd;
-{
- if (cmd)
- cmd->c_label = lbl;
- return cmd;
-}
-
-CMD *
-addcond(cmd, arg)
-register CMD *cmd;
-register ARG *arg;
-{
- cmd->c_expr = arg;
- opt_arg(cmd,1,0);
- cmd->c_flags |= CF_COND;
- return cmd;
-}
-
-CMD *
-addloop(cmd, arg)
-register CMD *cmd;
-register ARG *arg;
-{
- cmd->c_expr = arg;
- opt_arg(cmd,1,0);
- cmd->c_flags |= CF_COND|CF_LOOP;
- if (cmd->c_type == C_BLOCK)
- cmd->c_flags &= ~CF_COND;
- else {
- arg = cmd->ucmd.acmd.ac_expr;
- if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_CMD)
- cmd->c_flags &= ~CF_COND; /* "do {} while" happens at least once */
- if (arg && arg->arg_type == O_SUBR)
- cmd->c_flags &= ~CF_COND; /* likewise for "do subr() while" */
- }
- return cmd;
-}
-
-CMD *
-invert(cmd)
-register CMD *cmd;
-{
- cmd->c_flags ^= CF_INVERT;
- return cmd;
-}
-
-yyerror(s)
-char *s;
-{
- char tmpbuf[128];
- char *tname = tmpbuf;
-
- if (yychar > 256) {
- tname = tokename[yychar-256];
- if (strEQ(tname,"word"))
- strcpy(tname,tokenbuf);
- else if (strEQ(tname,"register"))
- sprintf(tname,"$%s",tokenbuf);
- else if (strEQ(tname,"array_length"))
- sprintf(tname,"$#%s",tokenbuf);
- }
- else if (!yychar)
- strcpy(tname,"EOF");
- else if (yychar < 32)
- sprintf(tname,"^%c",yychar+64);
- else if (yychar == 127)
- strcpy(tname,"^?");
- else
- sprintf(tname,"%c",yychar);
- sprintf(tokenbuf, "%s in file %s at line %d, next token \"%s\"\n",
- s,filename,line,tname);
- if (in_eval)
- str_set(stabent("@",TRUE)->stab_val,tokenbuf);
- else
- fputs(tokenbuf,stderr);
-}
-
-ARG *
-make_op(type,newlen,arg1,arg2,arg3,dolist)
-int type;
-int newlen;
-ARG *arg1;
-ARG *arg2;
-ARG *arg3;
-int dolist;
-{
- register ARG *arg;
- register ARG *chld;
- register int doarg;
-
- arg = op_new(newlen);
- arg->arg_type = type;
- doarg = opargs[type];
- if (chld = arg1) {
- if (!(doarg & 1))
- arg[1].arg_flags |= AF_SPECIAL;
- if (doarg & 16)
- arg[1].arg_flags |= AF_NUMERIC;
- if (chld->arg_type == O_ITEM &&
- (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL) ) {
- arg[1].arg_type = chld[1].arg_type;
- arg[1].arg_ptr = chld[1].arg_ptr;
- arg[1].arg_flags |= chld[1].arg_flags;
- free_arg(chld);
- }
- else {
- arg[1].arg_type = A_EXPR;
- arg[1].arg_ptr.arg_arg = chld;
- if (dolist & 1) {
- if (chld->arg_type == O_LIST) {
- if (newlen == 1) { /* we can hoist entire list */
- chld->arg_type = type;
- free_arg(arg);
- arg = chld;
- }
- else {
- arg[1].arg_flags |= AF_SPECIAL;
- }
- }
- else {
- switch (chld->arg_type) {
- case O_ARRAY:
- if (chld->arg_len == 1)
- arg[1].arg_flags |= AF_SPECIAL;
- break;
- case O_ITEM:
- if (chld[1].arg_type == A_READ ||
- chld[1].arg_type == A_INDREAD ||
- chld[1].arg_type == A_GLOB)
- arg[1].arg_flags |= AF_SPECIAL;
- break;
- case O_SPLIT:
- case O_TMS:
- case O_EACH:
- case O_VALUES:
- case O_KEYS:
- case O_SORT:
- arg[1].arg_flags |= AF_SPECIAL;
- break;
- }
- }
- }
- }
- }
- if (chld = arg2) {
- if (!(doarg & 2))
- arg[2].arg_flags |= AF_SPECIAL;
- if (doarg & 32)
- arg[2].arg_flags |= AF_NUMERIC;
- if (chld->arg_type == O_ITEM &&
- (hoistable[chld[1].arg_type] ||
- (type == O_ASSIGN &&
- ((chld[1].arg_type == A_READ && !(arg[1].arg_flags & AF_SPECIAL))
- ||
- (chld[1].arg_type == A_INDREAD && !(arg[1].arg_flags & AF_SPECIAL))
- ||
- (chld[1].arg_type == A_GLOB && !(arg[1].arg_flags & AF_SPECIAL))
- ||
- chld[1].arg_type == A_BACKTICK ) ) ) ) {
- arg[2].arg_type = chld[1].arg_type;
- arg[2].arg_ptr = chld[1].arg_ptr;
- free_arg(chld);
- }
- else {
- arg[2].arg_type = A_EXPR;
- arg[2].arg_ptr.arg_arg = chld;
- if ((dolist & 2) &&
- (chld->arg_type == O_LIST ||
- (chld->arg_type == O_ARRAY && chld->arg_len == 1) ))
- arg[2].arg_flags |= AF_SPECIAL;
- }
- }
- if (chld = arg3) {
- if (!(doarg & 4))
- arg[3].arg_flags |= AF_SPECIAL;
- if (doarg & 64)
- arg[3].arg_flags |= AF_NUMERIC;
- if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) {
- arg[3].arg_type = chld[1].arg_type;
- arg[3].arg_ptr = chld[1].arg_ptr;
- free_arg(chld);
- }
- else {
- arg[3].arg_type = A_EXPR;
- arg[3].arg_ptr.arg_arg = chld;
- if ((dolist & 4) &&
- (chld->arg_type == O_LIST ||
- (chld->arg_type == O_ARRAY && chld->arg_len == 1) ))
- arg[3].arg_flags |= AF_SPECIAL;
- }
- }
-#ifdef DEBUGGING
- if (debug & 16) {
- fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]);
- if (arg1)
- fprintf(stderr,",%s=%lx",
- argname[arg[1].arg_type],arg[1].arg_ptr.arg_arg);
- if (arg2)
- fprintf(stderr,",%s=%lx",
- argname[arg[2].arg_type],arg[2].arg_ptr.arg_arg);
- if (arg3)
- fprintf(stderr,",%s=%lx",
- argname[arg[3].arg_type],arg[3].arg_ptr.arg_arg);
- fprintf(stderr,")\n");
- }
-#endif
- evalstatic(arg); /* see if we can consolidate anything */
- return arg;
-}
-
-/* turn 123 into 123 == $. */
-
-ARG *
-flipflip(arg)
-register ARG *arg;
-{
- if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_SINGLE) {
- arg = (ARG*)saferealloc((char*)arg,3*sizeof(ARG));
- arg->arg_type = O_EQ;
- arg->arg_len = 2;
- arg[2].arg_type = A_STAB;
- arg[2].arg_flags = 0;
- arg[2].arg_ptr.arg_stab = stabent(".",TRUE);
- }
- return arg;
-}
-
-void
-evalstatic(arg)
-register ARG *arg;
-{
- register STR *str;
- register STR *s1;
- register STR *s2;
- double value; /* must not be register */
- register char *tmps;
- int i;
- unsigned long tmplong;
- double exp(), log(), sqrt(), modf();
- char *crypt();
-
- if (!arg || !arg->arg_len)
- return;
-
- if (arg[1].arg_type == A_SINGLE &&
- (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) {
- str = str_new(0);
- s1 = arg[1].arg_ptr.arg_str;
- if (arg->arg_len > 1)
- s2 = arg[2].arg_ptr.arg_str;
- else
- s2 = Nullstr;
- switch (arg->arg_type) {
- default:
- str_free(str);
- str = Nullstr; /* can't be evaluated yet */
- break;
- case O_CONCAT:
- str_sset(str,s1);
- str_scat(str,s2);
- break;
- case O_REPEAT:
- i = (int)str_gnum(s2);
- while (i-- > 0)
- str_scat(str,s1);
- break;
- case O_MULTIPLY:
- value = str_gnum(s1);
- str_numset(str,value * str_gnum(s2));
- break;
- case O_DIVIDE:
- value = str_gnum(s2);
- if (value == 0.0)
- fatal("Illegal division by constant zero");
- str_numset(str,str_gnum(s1) / value);
- break;
- case O_MODULO:
- tmplong = (unsigned long)str_gnum(s2);
- if (tmplong == 0L)
- fatal("Illegal modulus of constant zero");
- str_numset(str,(double)(((unsigned long)str_gnum(s1)) % tmplong));
- break;
- case O_ADD:
- value = str_gnum(s1);
- str_numset(str,value + str_gnum(s2));
- break;
- case O_SUBTRACT:
- value = str_gnum(s1);
- str_numset(str,value - str_gnum(s2));
- break;
- case O_LEFT_SHIFT:
- value = str_gnum(s1);
- i = (int)str_gnum(s2);
- str_numset(str,(double)(((unsigned long)value) << i));
- break;
- case O_RIGHT_SHIFT:
- value = str_gnum(s1);
- i = (int)str_gnum(s2);
- str_numset(str,(double)(((unsigned long)value) >> i));
- break;
- case O_LT:
- value = str_gnum(s1);
- str_numset(str,(double)(value < str_gnum(s2)));
- break;
- case O_GT:
- value = str_gnum(s1);
- str_numset(str,(double)(value > str_gnum(s2)));
- break;
- case O_LE:
- value = str_gnum(s1);
- str_numset(str,(double)(value <= str_gnum(s2)));
- break;
- case O_GE:
- value = str_gnum(s1);
- str_numset(str,(double)(value >= str_gnum(s2)));
- break;
- case O_EQ:
- value = str_gnum(s1);
- str_numset(str,(double)(value == str_gnum(s2)));
- break;
- case O_NE:
- value = str_gnum(s1);
- str_numset(str,(double)(value != str_gnum(s2)));
- break;
- case O_BIT_AND:
- value = str_gnum(s1);
- str_numset(str,(double)(((unsigned long)value) &
- ((unsigned long)str_gnum(s2))));
- break;
- case O_XOR:
- value = str_gnum(s1);
- str_numset(str,(double)(((unsigned long)value) ^
- ((unsigned long)str_gnum(s2))));
- break;
- case O_BIT_OR:
- value = str_gnum(s1);
- str_numset(str,(double)(((unsigned long)value) |
- ((unsigned long)str_gnum(s2))));
- break;
- case O_AND:
- if (str_true(s1))
- str = str_make(str_get(s2));
- else
- str = str_make(str_get(s1));
- break;
- case O_OR:
- if (str_true(s1))
- str = str_make(str_get(s1));
- else
- str = str_make(str_get(s2));
- break;
- case O_COND_EXPR:
- if (arg[3].arg_type != A_SINGLE) {
- str_free(str);
- str = Nullstr;
- }
- else {
- str = str_make(str_get(str_true(s1) ? s2 : arg[3].arg_ptr.arg_str));
- str_free(arg[3].arg_ptr.arg_str);
- }
- break;
- case O_NEGATE:
- str_numset(str,(double)(-str_gnum(s1)));
- break;
- case O_NOT:
- str_numset(str,(double)(!str_true(s1)));
- break;
- case O_COMPLEMENT:
- str_numset(str,(double)(~(long)str_gnum(s1)));
- break;
- case O_LENGTH:
- str_numset(str, (double)str_len(s1));
- break;
- case O_SUBSTR:
- if (arg[3].arg_type != A_SINGLE || stabent("[",allstabs)) {
- str_free(str); /* making the fallacious assumption */
- str = Nullstr; /* that any $[ occurs before substr()*/
- }
- else {
- char *beg;
- int len = (int)str_gnum(s2);
- int tmp;
-
- for (beg = str_get(s1); *beg && len > 0; beg++,len--) ;
- len = (int)str_gnum(arg[3].arg_ptr.arg_str);
- str_free(arg[3].arg_ptr.arg_str);
- if (len > (tmp = strlen(beg)))
- len = tmp;
- str_nset(str,beg,len);
- }
- break;
- case O_SLT:
- tmps = str_get(s1);
- str_numset(str,(double)(strLT(tmps,str_get(s2))));
- break;
- case O_SGT:
- tmps = str_get(s1);
- str_numset(str,(double)(strGT(tmps,str_get(s2))));
- break;
- case O_SLE:
- tmps = str_get(s1);
- str_numset(str,(double)(strLE(tmps,str_get(s2))));
- break;
- case O_SGE:
- tmps = str_get(s1);
- str_numset(str,(double)(strGE(tmps,str_get(s2))));
- break;
- case O_SEQ:
- tmps = str_get(s1);
- str_numset(str,(double)(strEQ(tmps,str_get(s2))));
- break;
- case O_SNE:
- tmps = str_get(s1);
- str_numset(str,(double)(strNE(tmps,str_get(s2))));
- break;
- case O_CRYPT:
-#ifdef CRYPT
- tmps = str_get(s1);
- str_set(str,crypt(tmps,str_get(s2)));
-#else
- fatal(
- "The crypt() function is unimplemented due to excessive paranoia.");
-#endif
- break;
- case O_EXP:
- str_numset(str,exp(str_gnum(s1)));
- break;
- case O_LOG:
- str_numset(str,log(str_gnum(s1)));
- break;
- case O_SQRT:
- str_numset(str,sqrt(str_gnum(s1)));
- break;
- case O_INT:
- value = str_gnum(s1);
- if (value >= 0.0)
- modf(value,&value);
- else {
- modf(-value,&value);
- value = -value;
- }
- str_numset(str,value);
- break;
- case O_ORD:
- str_numset(str,(double)(*str_get(s1)));
- break;
- }
- if (str) {
- arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */
- str_free(s1);
- str_free(s2);
- arg[1].arg_ptr.arg_str = str;
+ stab_flags(stab) = SF_VMAGIC;
+ str_magic(stab_val(stab), stab, 0, Nullch, 0);
}
}
}
-ARG *
-l(arg)
-register ARG *arg;
-{
- register int i;
- register ARG *arg1;
- ARG *tmparg;
-
- arg->arg_flags |= AF_COMMON; /* XXX should cross-match */
- /* this does unnecessary copying */
-
- if (arg[1].arg_type == A_ARYLEN) {
- arg[1].arg_type = A_LARYLEN;
- return arg;
- }
-
- /* see if it's an array reference */
-
- if (arg[1].arg_type == A_EXPR) {
- arg1 = arg[1].arg_ptr.arg_arg;
-
- if (arg1->arg_type == O_LIST && arg->arg_type != O_ITEM) {
- /* assign to list */
- arg[1].arg_flags |= AF_SPECIAL;
- dehoist(arg,2);
- arg[2].arg_flags |= AF_SPECIAL;
- for (i = arg1->arg_len; i >= 1; i--) {
- switch (arg1[i].arg_type) {
- case A_STAB: case A_LVAL:
- arg1[i].arg_type = A_LVAL;
- break;
- case A_EXPR: case A_LEXPR:
- arg1[i].arg_type = A_LEXPR;
- if (arg1[i].arg_ptr.arg_arg->arg_type == O_ARRAY)
- arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY;
- else if (arg1[i].arg_ptr.arg_arg->arg_type == O_HASH)
- arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH;
- if (arg1[i].arg_ptr.arg_arg->arg_type == O_LARRAY)
- break;
- if (arg1[i].arg_ptr.arg_arg->arg_type == O_LHASH)
- break;
- /* FALL THROUGH */
- default:
- sprintf(tokenbuf,
- "Illegal item (%s) as lvalue",argname[arg1[i].arg_type]);
- yyerror(tokenbuf);
- }
- }
- }
- else if (arg1->arg_type == O_ARRAY) {
- if (arg1->arg_len == 1 && arg->arg_type != O_ITEM) {
- /* assign to array */
- arg[1].arg_flags |= AF_SPECIAL;
- dehoist(arg,2);
- arg[2].arg_flags |= AF_SPECIAL;
- }
- else
- arg1->arg_type = O_LARRAY; /* assign to array elem */
- }
- else if (arg1->arg_type == O_HASH)
- arg1->arg_type = O_LHASH;
- else if (arg1->arg_type != O_ASSIGN) {
- sprintf(tokenbuf,
- "Illegal expression (%s) as lvalue",opname[arg1->arg_type]);
- yyerror(tokenbuf);
- }
- arg[1].arg_type = A_LEXPR;
-#ifdef DEBUGGING
- if (debug & 16)
- fprintf(stderr,"lval LEXPR\n");
-#endif
- return arg;
- }
-
- /* not an array reference, should be a register name */
-
- if (arg[1].arg_type != A_STAB && arg[1].arg_type != A_LVAL) {
- sprintf(tokenbuf,
- "Illegal item (%s) as lvalue",argname[arg[1].arg_type]);
- yyerror(tokenbuf);
- }
- arg[1].arg_type = A_LVAL;
-#ifdef DEBUGGING
- if (debug & 16)
- fprintf(stderr,"lval LVAL\n");
-#endif
- return arg;
-}
-
-dehoist(arg,i)
-ARG *arg;
-{
- ARG *tmparg;
-
- if (arg[i].arg_type != A_EXPR) { /* dehoist */
- tmparg = make_op(O_ITEM,1,Nullarg,Nullarg,Nullarg,0);
- tmparg[1] = arg[i];
- arg[i].arg_ptr.arg_arg = tmparg;
- arg[i].arg_type = A_EXPR;
- }
-}
-
-ARG *
-addflags(i,flags,arg)
-register ARG *arg;
-{
- arg[i].arg_flags |= flags;
- return arg;
-}
-
-ARG *
-hide_ary(arg)
-ARG *arg;
-{
- if (arg->arg_type == O_ARRAY)
- return make_op(O_ITEM,1,arg,Nullarg,Nullarg,0);
- return arg;
-}
-
-ARG *
-make_list(arg)
-register ARG *arg;
-{
- register int i;
- register ARG *node;
- register ARG *nxtnode;
- register int j;
- STR *tmpstr;
-
- if (!arg) {
- arg = op_new(0);
- arg->arg_type = O_LIST;
- }
- if (arg->arg_type != O_COMMA) {
- arg->arg_flags |= AF_LISTISH; /* see listish() below */
- return arg;
- }
- for (i = 2, node = arg; ; i++) {
- if (node->arg_len < 2)
- break;
- if (node[2].arg_type != A_EXPR)
- break;
- node = node[2].arg_ptr.arg_arg;
- if (node->arg_type != O_COMMA)
- break;
- }
- if (i > 2) {
- node = arg;
- arg = op_new(i);
- tmpstr = arg->arg_ptr.arg_str;
- *arg = *node; /* copy everything except the STR */
- arg->arg_ptr.arg_str = tmpstr;
- for (j = 1; ; ) {
- arg[j] = node[1];
- ++j; /* Bug in Xenix compiler */
- if (j >= i) {
- arg[j] = node[2];
- free_arg(node);
- break;
- }
- nxtnode = node[2].arg_ptr.arg_arg;
- free_arg(node);
- node = nxtnode;
- }
- }
- arg->arg_type = O_LIST;
- arg->arg_len = i;
- return arg;
-}
-
-/* turn a single item into a list */
-
-ARG *
-listish(arg)
-ARG *arg;
-{
- if (arg->arg_flags & AF_LISTISH) {
- arg = make_op(O_LIST,1,arg,Nullarg,Nullarg,0);
- arg[1].arg_flags &= ~AF_SPECIAL;
- }
- return arg;
-}
-
-/* mark list of local variables */
-
-ARG *
-localize(arg)
-ARG *arg;
-{
- arg->arg_flags |= AF_LOCAL;
- return arg;
-}
-
-ARG *
-stab2arg(atype,stab)
-int atype;
-register STAB *stab;
-{
- register ARG *arg;
-
- arg = op_new(1);
- arg->arg_type = O_ITEM;
- arg[1].arg_type = atype;
- arg[1].arg_ptr.arg_stab = stab;
- return arg;
-}
-
-ARG *
-cval_to_arg(cval)
-register char *cval;
-{
- register ARG *arg;
-
- arg = op_new(1);
- arg->arg_type = O_ITEM;
- arg[1].arg_type = A_SINGLE;
- arg[1].arg_ptr.arg_str = str_make(cval);
- safefree(cval);
- return arg;
-}
-
-ARG *
-op_new(numargs)
-int numargs;
-{
- register ARG *arg;
-
- arg = (ARG*)safemalloc((numargs + 1) * sizeof (ARG));
- bzero((char *)arg, (numargs + 1) * sizeof (ARG));
- arg->arg_ptr.arg_str = str_new(0);
- arg->arg_len = numargs;
- return arg;
-}
-
-void
-free_arg(arg)
-ARG *arg;
-{
- str_free(arg->arg_ptr.arg_str);
- safefree((char*)arg);
-}
-
-ARG *
-make_match(type,expr,spat)
-int type;
-ARG *expr;
-SPAT *spat;
-{
- register ARG *arg;
-
- arg = make_op(type,2,expr,Nullarg,Nullarg,0);
-
- arg[2].arg_type = A_SPAT;
- arg[2].arg_ptr.arg_spat = spat;
-#ifdef DEBUGGING
- if (debug & 16)
- fprintf(stderr,"make_match SPAT=%lx\n",(long)spat);
-#endif
-
- if (type == O_SUBST || type == O_NSUBST) {
- if (arg[1].arg_type != A_STAB)
- yyerror("Illegal lvalue");
- arg[1].arg_type = A_LVAL;
- }
- return arg;
-}
-
-ARG *
-cmd_to_arg(cmd)
-CMD *cmd;
-{
- register ARG *arg;
-
- arg = op_new(1);
- arg->arg_type = O_ITEM;
- arg[1].arg_type = A_CMD;
- arg[1].arg_ptr.arg_cmd = cmd;
- return arg;
-}
-
-CMD *
-wopt(cmd)
-register CMD *cmd;
-{
- register CMD *tail;
- register ARG *arg = cmd->c_expr;
- STAB *asgnstab;
-
- /* hoist "while (<channel>)" up into command block */
-
- if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_READ) {
- cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */
- cmd->c_flags |= CFT_GETS; /* and set it to do the input */
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- if (arg[1].arg_ptr.arg_stab->stab_io->flags & IOF_ARGV) {
- cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$_ =" */
- stab2arg(A_LVAL,defstab), arg, Nullarg,1 ));
- }
- else {
- free_arg(arg);
- cmd->c_expr = Nullarg;
- }
- }
- else if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_INDREAD) {
- cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */
- cmd->c_flags |= CFT_INDGETS; /* and set it to do the input */
- cmd->c_stab = arg[1].arg_ptr.arg_stab;
- free_arg(arg);
- cmd->c_expr = Nullarg;
- }
- else if (arg && arg->arg_type == O_ITEM && arg[1].arg_type == A_GLOB) {
- if ((cmd->c_flags & CF_OPTIMIZE) == CFT_ARRAY)
- asgnstab = cmd->c_stab;
- else
- asgnstab = defstab;
- cmd->c_expr = l(make_op(O_ASSIGN, 2, /* fake up "$foo =" */
- stab2arg(A_LVAL,asgnstab), arg, Nullarg,1 ));
- cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */
- }
-
- /* First find the end of the true list */
-
- if (cmd->ucmd.ccmd.cc_true == Nullcmd)
- return cmd;
- for (tail = cmd->ucmd.ccmd.cc_true; tail->c_next; tail = tail->c_next) ;
-
- /* if there's a continue block, link it to true block and find end */
-
- if (cmd->ucmd.ccmd.cc_alt != Nullcmd) {
- tail->c_next = cmd->ucmd.ccmd.cc_alt;
- for ( ; tail->c_next; tail = tail->c_next) ;
- }
-
- /* Here's the real trick: link the end of the list back to the beginning,
- * inserting a "last" block to break out of the loop. This saves one or
- * two procedure calls every time through the loop, because of how cmd_exec
- * does tail recursion.
- */
-
- tail->c_next = (CMD *) safemalloc(sizeof (CMD));
- tail = tail->c_next;
- if (!cmd->ucmd.ccmd.cc_alt)
- cmd->ucmd.ccmd.cc_alt = tail; /* every loop has a continue now */
-
- bcopy((char *)cmd, (char *)tail, sizeof(CMD));
- tail->c_type = C_EXPR;
- tail->c_flags ^= CF_INVERT; /* turn into "last unless" */
- tail->c_next = tail->ucmd.ccmd.cc_true; /* loop directly back to top */
- tail->ucmd.acmd.ac_expr = make_op(O_LAST,0,Nullarg,Nullarg,Nullarg,0);
- tail->ucmd.acmd.ac_stab = Nullstab;
- return cmd;
-}
-
-CMD *
-over(eachstab,cmd)
-STAB *eachstab;
-register CMD *cmd;
-{
- /* hoist "for $foo (@bar)" up into command block */
-
- cmd->c_flags &= ~CF_OPTIMIZE; /* clear optimization type */
- cmd->c_flags |= CFT_ARRAY; /* and set it to do the iteration */
- cmd->c_stab = eachstab;
-
- return cmd;
-}
-
-static int gensym = 0;
-
-STAB *
-genstab()
-{
- sprintf(tokenbuf,"_GEN_%d",gensym++);
- return stabent(tokenbuf,TRUE);
-}
-
/* this routine is in perly.c by virtue of being sort of an alternate main() */
-STR *
-do_eval(str,optype)
+int
+do_eval(str,optype,stash,gimme,arglast)
STR *str;
int optype;
+HASH *stash;
+int gimme;
+int *arglast;
{
+ STR **st = stack->ary_array;
int retval;
CMD *myroot;
ARRAY *ar;
@@ -1709,26 +707,39 @@ int optype;
line_t oldline = line;
int oldtmps_base = tmps_base;
int oldsave = savestack->ary_fill;
+ SPAT *oldspat = curspat;
+ static char *last_eval = Nullch;
+ static CMD *last_root = Nullcmd;
+ int sp = arglast[0];
tmps_base = tmps_max;
- str_set(stabent("@",TRUE)->stab_val,"");
+ if (curstash != stash) {
+ (void)savehptr(&curstash);
+ curstash = stash;
+ }
+ str_set(stab_val(stabent("@",TRUE)),"");
if (optype != O_DOFILE) { /* normal eval */
filename = "(eval)";
line = 1;
str_sset(linestr,str);
+ str_cat(linestr,";"); /* be kind to them */
}
else {
+ if (last_root) {
+ Safefree(last_eval);
+ cmd_free(last_root);
+ last_root = Nullcmd;
+ }
filename = savestr(str_get(str)); /* can't free this easily */
str_set(linestr,"");
rsfp = fopen(filename,"r");
- ar = incstab->stab_array;
+ ar = stab_array(incstab);
if (!rsfp && *filename != '/') {
for (i = 0; i <= ar->ary_fill; i++) {
- sprintf(tokenbuf,"%s/%s",str_get(afetch(ar,i)),filename);
- rsfp = fopen(tokenbuf,"r");
+ (void)sprintf(buf,"%s/%s",str_get(afetch(ar,i,TRUE)),filename);
+ rsfp = fopen(buf,"r");
if (rsfp) {
- free(filename);
- filename = savestr(tokenbuf);
+ filename = savestr(buf);
break;
}
}
@@ -1736,230 +747,65 @@ int optype;
if (!rsfp) {
filename = oldfile;
tmps_base = oldtmps_base;
- return &str_no;
+ if (gimme != G_ARRAY)
+ st[++sp] = &str_undef;
+ return sp;
}
line = 0;
}
in_eval++;
- bufptr = str_get(linestr);
- if (setjmp(eval_env))
+ oldoldbufptr = oldbufptr = bufptr = str_get(linestr);
+ bufend = bufptr + linestr->str_cur;
+ if (setjmp(eval_env)) {
retval = 1;
- else
- retval = yyparse();
+ last_root = Nullcmd;
+ }
+ else {
+ error_count = 0;
+ if (rsfp)
+ retval = yyparse();
+ else if (last_root && *bufptr == *last_eval && strEQ(bufptr,last_eval)){
+ retval = 0;
+ eval_root = last_root; /* no point in reparsing */
+ }
+ else if (in_eval == 1) {
+ if (last_root) {
+ Safefree(last_eval);
+ cmd_free(last_root);
+ }
+ last_eval = savestr(bufptr);
+ last_root = Nullcmd;
+ retval = yyparse();
+ if (!retval)
+ last_root = eval_root;
+ }
+ else
+ retval = yyparse();
+ }
myroot = eval_root; /* in case cmd_exec does another eval! */
- if (retval)
- str = &str_no;
+ if (retval || error_count) {
+ str = &str_undef;
+ last_root = Nullcmd; /* can't free on error, for some reason */
+ if (rsfp) {
+ fclose(rsfp);
+ rsfp = 0;
+ }
+ }
else {
- str = str_static(cmd_exec(eval_root));
- /* if we don't save str, free zaps it */
- cmd_free(myroot); /* can't free on error, for some reason */
+ sp = cmd_exec(eval_root,gimme,sp);
+ st = stack->ary_array;
+ for (i = arglast[0] + 1; i <= sp; i++)
+ st[i] = str_static(st[i]);
+ /* if we don't save result, free zaps it */
+ if (in_eval != 1 && myroot != last_root)
+ cmd_free(myroot);
}
in_eval--;
filename = oldfile;
line = oldline;
tmps_base = oldtmps_base;
+ curspat = oldspat;
if (savestack->ary_fill > oldsave) /* let them use local() */
restorelist(oldsave);
- return str;
-}
-
-cmd_free(cmd)
-register CMD *cmd;
-{
- register CMD *tofree;
- register CMD *head = cmd;
-
- while (cmd) {
- if (cmd->c_type != C_WHILE) { /* WHILE block is duplicated */
- if (cmd->c_label)
- safefree(cmd->c_label);
- if (cmd->c_short)
- str_free(cmd->c_short);
- if (cmd->c_spat)
- spat_free(cmd->c_spat);
- if (cmd->c_expr)
- arg_free(cmd->c_expr);
- }
- switch (cmd->c_type) {
- case C_WHILE:
- case C_BLOCK:
- case C_IF:
- if (cmd->ucmd.ccmd.cc_true)
- cmd_free(cmd->ucmd.ccmd.cc_true);
- if (cmd->c_type == C_IF && cmd->ucmd.ccmd.cc_alt)
- cmd_free(cmd->ucmd.ccmd.cc_alt);
- break;
- case C_EXPR:
- if (cmd->ucmd.acmd.ac_expr)
- arg_free(cmd->ucmd.acmd.ac_expr);
- break;
- }
- tofree = cmd;
- cmd = cmd->c_next;
- safefree((char*)tofree);
- if (cmd && cmd == head) /* reached end of while loop */
- break;
- }
-}
-
-arg_free(arg)
-register ARG *arg;
-{
- register int i;
-
- for (i = 1; i <= arg->arg_len; i++) {
- switch (arg[i].arg_type) {
- case A_NULL:
- break;
- case A_LEXPR:
- case A_EXPR:
- arg_free(arg[i].arg_ptr.arg_arg);
- break;
- case A_CMD:
- cmd_free(arg[i].arg_ptr.arg_cmd);
- break;
- case A_WORD:
- case A_STAB:
- case A_LVAL:
- case A_READ:
- case A_GLOB:
- case A_ARYLEN:
- break;
- case A_SINGLE:
- case A_DOUBLE:
- case A_BACKTICK:
- str_free(arg[i].arg_ptr.arg_str);
- break;
- case A_SPAT:
- spat_free(arg[i].arg_ptr.arg_spat);
- break;
- case A_NUMBER:
- break;
- }
- }
- free_arg(arg);
-}
-
-spat_free(spat)
-register SPAT *spat;
-{
- register SPAT *sp;
-
- if (spat->spat_runtime)
- arg_free(spat->spat_runtime);
- if (spat->spat_repl) {
- arg_free(spat->spat_repl);
- }
- if (spat->spat_short) {
- str_free(spat->spat_short);
- }
- if (spat->spat_regexp) {
- regfree(spat->spat_regexp);
- }
-
- /* now unlink from spat list */
- if (spat_root == spat)
- spat_root = spat->spat_next;
- else {
- for (sp = spat_root; sp->spat_next != spat; sp = sp->spat_next) ;
- sp->spat_next = spat->spat_next;
- }
-
- safefree((char*)spat);
-}
-
-/* Recursively descend a command sequence and push the address of any string
- * that needs saving on recursion onto the tosave array.
- */
-
-static int
-cmd_tosave(cmd)
-register CMD *cmd;
-{
- register CMD *head = cmd;
-
- while (cmd) {
- if (cmd->c_spat)
- spat_tosave(cmd->c_spat);
- if (cmd->c_expr)
- arg_tosave(cmd->c_expr);
- switch (cmd->c_type) {
- case C_WHILE:
- case C_BLOCK:
- case C_IF:
- if (cmd->ucmd.ccmd.cc_true)
- cmd_tosave(cmd->ucmd.ccmd.cc_true);
- if (cmd->c_type == C_IF && cmd->ucmd.ccmd.cc_alt)
- cmd_tosave(cmd->ucmd.ccmd.cc_alt);
- break;
- case C_EXPR:
- if (cmd->ucmd.acmd.ac_expr)
- arg_tosave(cmd->ucmd.acmd.ac_expr);
- break;
- }
- cmd = cmd->c_next;
- if (cmd && cmd == head) /* reached end of while loop */
- break;
- }
-}
-
-static int
-arg_tosave(arg)
-register ARG *arg;
-{
- register int i;
- int saving = FALSE;
-
- for (i = 1; i <= arg->arg_len; i++) {
- switch (arg[i].arg_type) {
- case A_NULL:
- break;
- case A_LEXPR:
- case A_EXPR:
- saving |= arg_tosave(arg[i].arg_ptr.arg_arg);
- break;
- case A_CMD:
- cmd_tosave(arg[i].arg_ptr.arg_cmd);
- saving = TRUE; /* assume hanky panky */
- break;
- case A_WORD:
- case A_STAB:
- case A_LVAL:
- case A_READ:
- case A_GLOB:
- case A_ARYLEN:
- case A_SINGLE:
- case A_DOUBLE:
- case A_BACKTICK:
- break;
- case A_SPAT:
- saving |= spat_tosave(arg[i].arg_ptr.arg_spat);
- break;
- case A_NUMBER:
- break;
- }
- }
- switch (arg->arg_type) {
- case O_EVAL:
- case O_SUBR:
- saving = TRUE;
- }
- if (saving)
- apush(tosave,arg->arg_ptr.arg_str);
- return saving;
-}
-
-static int
-spat_tosave(spat)
-register SPAT *spat;
-{
- int saving = FALSE;
-
- if (spat->spat_runtime)
- saving |= arg_tosave(spat->spat_runtime);
- if (spat->spat_repl) {
- saving |= arg_tosave(spat->spat_repl);
- }
-
- return saving;
+ return sp;
}
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