3 * Copyright (c) 1987-1994 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* Omit -- it causes too much grief on mixed systems.
24 char rcsid[] = "perl.c\nPatch level: ###\n";
32 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
38 static void find_beginning _((void));
39 static void incpush _((char *));
40 static void init_ids _((void));
41 static void init_debugger _((void));
42 static void init_lexer _((void));
43 static void init_main_stash _((void));
44 static void init_perllib _((void));
45 static void init_postdump_symbols _((int, char **, char **));
46 static void init_predump_symbols _((void));
47 static void init_stacks _((void));
48 static void open_script _((char *, bool, SV *));
49 static void validate_suid _((char *));
54 PerlInterpreter *sv_interp;
57 New(53, sv_interp, 1, PerlInterpreter);
62 perl_construct( sv_interp )
63 register PerlInterpreter *sv_interp;
65 if (!(curinterp = sv_interp))
69 Zero(sv_interp, 1, PerlInterpreter);
72 /* Init the real globals? */
74 linestr = NEWSV(65,80);
75 sv_upgrade(linestr,SVt_PVIV);
77 SvREADONLY_on(&sv_undef);
81 SvREADONLY_on(&sv_no);
83 sv_setpv(&sv_yes,Yes);
85 SvREADONLY_on(&sv_yes);
89 * There is no way we can refer to them from Perl so close them to save
90 * space. The other alternative would be to provide STDAUX and STDPRN
119 sprintf(patchlevel, "%5.3f", 5.0 + (PATCHLEVEL / 1000.0));
121 fdpid = newAV(); /* for remembering popen pids by fd */
122 pidstatus = newHV();/* for remembering status of dead pids */
129 perl_destruct(sv_interp)
130 register PerlInterpreter *sv_interp;
132 int destruct_level; /* 0=none, 1=full, 2=full with checks */
136 if (!(curinterp = sv_interp))
139 destruct_level = perl_destruct_level;
144 /* We must account for everything. First the syntax tree. */
146 curpad = AvARRAY(comppad);
153 * Try to destruct global references. We do this first so that the
154 * destructors and destructees still exist. Some sv's might remain.
155 * Non-referenced objects are on their own.
162 if (destruct_level == 0){
164 DEBUG_P(debprofdump());
166 /* The exit() function will do everything that needs doing. */
170 /* Prepare to destruct main symbol table. */
176 if (destruct_level >= 2) {
177 if (scopestack_ix != 0)
178 warn("Unbalanced scopes: %d more ENTERs than LEAVEs\n", scopestack_ix);
179 if (savestack_ix != 0)
180 warn("Unbalanced saves: %d more saves than restores\n", savestack_ix);
181 if (tmps_floor != -1)
182 warn("Unbalanced tmps: %d more allocs than frees\n", tmps_floor + 1);
183 if (cxstack_ix != -1)
184 warn("Unbalanced context: %d more PUSHes than POPs\n", cxstack_ix + 1);
187 /* Now absolutely destruct everything, somehow or other, loops or no. */
189 while (sv_count != 0 && sv_count != last_sv_count) {
190 last_sv_count = sv_count;
194 warn("Scalars leaked: %d\n", sv_count);
196 DEBUG_P(debprofdump());
201 PerlInterpreter *sv_interp;
203 if (!(curinterp = sv_interp))
207 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
208 char *getenv _((char *)); /* Usually in <stdlib.h> */
212 perl_parse(sv_interp, xsinit, argc, argv, env)
213 PerlInterpreter *sv_interp;
214 void (*xsinit)_((void));
222 VOL bool dosearch = FALSE;
226 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
229 croak("suidperl is no longer needed since the kernel can now execute\n\
230 setuid perl scripts securely.\n");
234 if (!(curinterp = sv_interp))
239 #ifndef VMS /* VMS doesn't have environ array */
240 origenviron = environ;
245 /* Come here if running an undumped a.out. */
247 origfilename = savepv(argv[0]);
249 cxstack_ix = -1; /* start label stack again */
251 init_postdump_symbols(argc,argv,env);
259 switch (setjmp(top_env)) {
270 return(statusvalue); /* my_exit() was called */
272 fprintf(stderr, "panic: top_env\n");
276 sv_setpvn(linestr,"",0);
277 sv = newSVpv("",0); /* first used for -I flags */
280 for (argc--,argv++; argc > 0; argc--,argv++) {
281 if (argv[0][0] != '-' || !argv[0][1])
285 validarg = " PHOOEY ";
308 if (s = moreswitches(s))
313 if (euid != uid || egid != gid)
314 croak("No -e allowed in setuid scripts");
316 e_tmpname = savepv(TMPPATH);
317 (void)mktemp(e_tmpname);
319 croak("Can't mktemp()");
320 e_fp = fopen(e_tmpname,"w");
322 croak("Cannot open temporary file");
328 (void)putc('\n', e_fp);
336 av_push(GvAVn(incgv),newSVpv(s,0));
339 av_push(GvAVn(incgv),newSVpv(argv[1],0));
340 sv_catpv(sv,argv[1]);
367 croak("Unrecognized switch: -%s",s);
371 scriptname = argv[0];
373 if (fflush(e_fp) || ferror(e_fp) || fclose(e_fp))
374 croak("Can't write to temp file for -e: %s", Strerror(errno));
376 scriptname = e_tmpname;
378 else if (scriptname == Nullch) {
380 if ( isatty(fileno(stdin)) )
388 open_script(scriptname,dosearch,sv);
390 validate_suid(validarg);
395 compcv = (CV*)NEWSV(1104,0);
396 sv_upgrade((SV *)compcv, SVt_PVCV);
400 av_push(comppad, Nullsv);
401 curpad = AvARRAY(comppad);
403 comppad_name = padname;
404 comppad_name_fill = 0;
405 min_intro_pending = 0;
408 comppadlist = newAV();
409 AvREAL_off(comppadlist);
410 av_store(comppadlist, 0, SvREFCNT_inc((SV*)comppad_name));
411 av_store(comppadlist, 1, SvREFCNT_inc((SV*)comppad));
412 CvPADLIST(compcv) = comppadlist;
415 (*xsinit)(); /* in case linked C routines want magical variables */
420 init_predump_symbols();
422 init_postdump_symbols(argc,argv,env);
426 /* now parse the script */
429 if (yyparse() || error_count) {
431 croak("%s had compilation errors.\n", origfilename);
433 croak("Execution of %s aborted due to compilation errors.\n",
437 curcop->cop_line = 0;
442 (void)UNLINK(e_tmpname);
445 /* now that script is parsed, we can modify record separator */
450 rspara = (nrslen == 2);
451 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs, rslen);
468 PerlInterpreter *sv_interp;
470 if (!(curinterp = sv_interp))
472 switch (setjmp(top_env)) {
474 cxstack_ix = -1; /* start context stack again */
481 return(statusvalue); /* my_exit() was called */
484 fprintf(stderr, "panic: restartop\n");
488 if (stack != mainstack) {
490 SWITCHSTACK(stack, mainstack);
497 DEBUG(fprintf(stderr,"\nEXECUTING...\n\n"));
500 fprintf(stderr,"%s syntax OK\n", origfilename);
503 if (perldb && DBsingle)
504 sv_setiv(DBsingle, 1);
514 else if (main_start) {
527 register CONTEXT *cx;
531 statusvalue = FIXSTATUS(status);
532 if (cxstack_ix >= 0) {
542 perl_get_sv(name, create)
546 GV* gv = gv_fetchpv(name, create, SVt_PV);
553 perl_get_av(name, create)
557 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
566 perl_get_hv(name, create)
570 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
579 perl_get_cv(name, create)
583 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
584 if (create && !GvCV(gv))
585 return newSUB(start_subparse(),
586 newSVOP(OP_CONST, 0, newSVpv(name,0)),
593 /* Be sure to refetch the stack pointer after calling these routines. */
596 perl_call_argv(subname, flags, argv)
598 I32 flags; /* See G_* flags in cop.h */
599 register char **argv; /* null terminated arg list */
606 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
611 return perl_call_pv(subname, flags);
615 perl_call_pv(subname, flags)
616 char *subname; /* name of the subroutine */
617 I32 flags; /* See G_* flags in cop.h */
619 return perl_call_sv((SV*)perl_get_cv(subname, TRUE), flags);
623 perl_call_method(methname, flags)
624 char *methname; /* name of the subroutine */
625 I32 flags; /* See G_* flags in cop.h */
631 XPUSHs(sv_2mortal(newSVpv(methname,0)));
634 return perl_call_sv(*stack_sp--, flags);
637 /* May be called with any of a CV, a GV, or an SV containing the name. */
639 perl_call_sv(sv, flags)
641 I32 flags; /* See G_* flags in cop.h */
643 LOGOP myop; /* fake syntax tree node */
645 I32 oldmark = TOPMARK;
650 if (flags & G_DISCARD) {
660 oldscope = scopestack_ix;
662 if (!(flags & G_NOARGS))
663 myop.op_flags = OPf_STACKED;
664 myop.op_next = Nullop;
665 myop.op_flags |= OPf_KNOW;
667 myop.op_flags |= OPf_LIST;
669 if (flags & G_EVAL) {
670 Copy(top_env, oldtop, 1, jmp_buf);
672 cLOGOP->op_other = op;
678 switch (setjmp(top_env)) {
683 statusvalue = 255; /* XXX I don't think we use 1 anymore. */
689 /* my_exit() was called */
692 Copy(oldtop, top_env, 1, jmp_buf);
694 croak("Callback called exit");
695 my_exit(statusvalue);
703 stack_sp = stack_base + oldmark;
708 *++stack_sp = &sv_undef;
714 if (op == (OP*)&myop)
718 retval = stack_sp - (stack_base + oldmark);
720 sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
723 if (flags & G_EVAL) {
724 if (scopestack_ix > oldscope) {
728 register CONTEXT *cx;
737 Copy(oldtop, top_env, 1, jmp_buf);
739 if (flags & G_DISCARD) {
740 stack_sp = stack_base + oldmark;
748 /* Older forms, here grandfathered. */
752 perl_callargv(subname, spix, gimme, argv)
754 register I32 spix; /* current stack pointer index */
755 I32 gimme; /* See G_* flags in cop.h */
756 register char **argv; /* null terminated arg list, NULL for no arglist */
758 stack_sp = stack_base + spix;
759 return spix + perl_call_argv(subname, gimme, argv);
763 perl_callpv(subname, spix, gimme, hasargs, numargs)
765 I32 spix; /* stack pointer index after args are pushed */
766 I32 gimme; /* See G_* flags in cop.h */
767 I32 hasargs; /* whether to create a @_ array for routine */
768 I32 numargs; /* how many args are pushed on the stack */
770 stack_sp = stack_base + spix;
771 PUSHMARK(stack_sp - numargs);
772 return spix - numargs + perl_call_sv((SV*)perl_get_cv(subname, TRUE),
773 gimme, hasargs, numargs);
777 perl_callsv(sv, spix, gimme, hasargs, numargs)
779 I32 spix; /* stack pointer index after args are pushed */
780 I32 gimme; /* See G_* flags in cop.h */
781 I32 hasargs; /* whether to create a @_ array for routine */
782 I32 numargs; /* how many args are pushed on the stack */
784 stack_sp = stack_base + spix;
785 PUSHMARK(stack_sp - numargs);
786 return spix - numargs + perl_call_sv(sv, gimme, hasargs, numargs);
790 /* Require a module. */
796 UNOP myop; /* fake syntax tree node */
809 myop.op_type = OP_REQUIRE;
810 myop.op_next = Nullop;
812 myop.op_flags = OPf_KNOW;
815 if (op = pp_require())
823 magicname(sym,name,namlen)
830 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
831 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
835 # define PERLLIB_SEP ';'
837 # define PERLLIB_SEP '|'
839 # define PERLLIB_SEP ':'
851 /* Break at all separators */
853 /* First, skip any consecutive separators */
854 while ( *p == PERLLIB_SEP ) {
855 /* Uncomment the next line for PATH semantics */
856 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
859 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
860 av_push(GvAVn(incgv), newSVpv(p, (STRLEN)(s - p)));
863 av_push(GvAVn(incgv), newSVpv(p, 0));
869 /* This routine handles any switches that can be given during run */
879 nrschar = scan_oct(s, 4, &numlen);
880 nrs = savepvn("\n",1);
882 if (nrschar > 0377) {
886 else if (!nrschar && numlen >= 2) {
894 splitstr = savepv(s + 1);
917 static char debopts[] = "psltocPmfrxuLHXD";
920 for (s++; *s && (d = strchr(debopts,*s)); s++)
921 debug |= 1 << (d - debopts);
925 for (s++; isDIGIT(*s); s++) ;
929 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
930 for (s++; isALNUM(*s); s++) ;
937 inplace = savepv(s+1);
939 for (s = inplace; *s && !isSPACE(*s); s++) ;
946 for (e = s; *e && !isSPACE(*e); e++) ;
947 av_push(GvAVn(incgv),newSVpv(s,e-s));
952 croak("No space allowed after -I");
962 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
966 ors = savepvn(nrs,nrslen);
996 printf("\nThis is perl, version %s\n\n",patchlevel);
997 fputs("\nCopyright 1987-1994, Larry Wall\n",stdout);
999 fputs("MS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n",
1002 fputs("OS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n",
1007 fputs("atariST series port, ++jrb bammi@cadence.com\n", stdout);
1010 Perl may be copied only under the terms of either the Artistic License or the\n\
1011 GNU General Public License, which may be found in the Perl 5.0 source kit.\n",stdout);
1022 if (s[1] == '-') /* Additional switches on #! line. */
1035 croak("Can't emulate -%.1s on #! line",s);
1040 /* compliments of Tom Christiansen */
1042 /* unexec() can be found in the Gnu emacs distribution */
1051 sprintf (buf, "%s.perldump", origfilename);
1052 sprintf (tokenbuf, "%s/perl", BIN);
1054 status = unexec(buf, tokenbuf, &etext, sbrk(0), 0);
1056 fprintf(stderr, "unexec of %s into %s failed!\n", tokenbuf, buf);
1059 ABORT(); /* for use with undump */
1067 curstash = defstash = newHV();
1068 curstname = newSVpv("main",4);
1069 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1070 SvREFCNT_dec(GvHV(gv));
1071 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1073 HvNAME(defstash) = savepv("main");
1074 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1076 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1077 curstash = defstash;
1078 compiling.cop_stash = defstash;
1079 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1082 #ifdef CAN_PROTOTYPE
1084 open_script(char *scriptname, bool dosearch, SV *sv)
1087 open_script(scriptname,dosearch,sv)
1093 char *xfound = Nullch;
1094 char *xfailed = Nullch;
1098 if (dosearch && !strchr(scriptname, '/') && (s = getenv("PATH"))) {
1100 bufend = s + strlen(s);
1103 s = cpytill(tokenbuf,s,bufend,':',&len);
1106 for (len = 0; *s && *s != ',' && *s != ';'; tokenbuf[len++] = *s++);
1107 tokenbuf[len] = '\0';
1109 for (len = 0; *s && *s != ';'; tokenbuf[len++] = *s++);
1110 tokenbuf[len] = '\0';
1116 if (len && tokenbuf[len-1] != '/')
1119 if (len && ((tokenbuf[len-1] != '\\') && (tokenbuf[len-1] != '/')))
1121 if (len && tokenbuf[len-1] != '\\')
1124 (void)strcat(tokenbuf+len,"/");
1125 (void)strcat(tokenbuf+len,scriptname);
1126 DEBUG_p(fprintf(stderr,"Looking for %s\n",tokenbuf));
1127 if (Stat(tokenbuf,&statbuf) < 0) /* not there? */
1129 if (S_ISREG(statbuf.st_mode)
1130 && cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) {
1131 xfound = tokenbuf; /* bingo! */
1135 xfailed = savepv(tokenbuf);
1138 croak("Can't execute %s", xfailed ? xfailed : scriptname );
1141 scriptname = xfound;
1144 origfilename = savepv(e_fp ? "-e" : scriptname);
1145 curcop->cop_filegv = gv_fetchfile(origfilename);
1146 if (strEQ(origfilename,"-"))
1149 char *cpp = CPPSTDIN;
1151 if (strEQ(cpp,"cppstdin"))
1152 sprintf(tokenbuf, "%s/%s", SCRIPTDIR, cpp);
1154 sprintf(tokenbuf, "%s", cpp);
1156 sv_catpv(sv,PRIVLIB_EXP);
1158 (void)sprintf(buf, "\
1159 sed %s -e \"/^[^#]/b\" \
1160 -e \"/^#[ ]*include[ ]/b\" \
1161 -e \"/^#[ ]*define[ ]/b\" \
1162 -e \"/^#[ ]*if[ ]/b\" \
1163 -e \"/^#[ ]*ifdef[ ]/b\" \
1164 -e \"/^#[ ]*ifndef[ ]/b\" \
1165 -e \"/^#[ ]*else/b\" \
1166 -e \"/^#[ ]*elif[ ]/b\" \
1167 -e \"/^#[ ]*undef[ ]/b\" \
1168 -e \"/^#[ ]*endif/b\" \
1171 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1173 (void)sprintf(buf, "\
1174 %s %s -e '/^[^#]/b' \
1175 -e '/^#[ ]*include[ ]/b' \
1176 -e '/^#[ ]*define[ ]/b' \
1177 -e '/^#[ ]*if[ ]/b' \
1178 -e '/^#[ ]*ifdef[ ]/b' \
1179 -e '/^#[ ]*ifndef[ ]/b' \
1180 -e '/^#[ ]*else/b' \
1181 -e '/^#[ ]*elif[ ]/b' \
1182 -e '/^#[ ]*undef[ ]/b' \
1183 -e '/^#[ ]*endif/b' \
1191 (doextract ? "-e '1,/^#/d\n'" : ""),
1193 scriptname, tokenbuf, SvPV(sv, na), CPPMINUS);
1195 #ifdef IAMSUID /* actually, this is caught earlier */
1196 if (euid != uid && !euid) { /* if running suidperl */
1198 (void)seteuid(uid); /* musn't stay setuid root */
1201 (void)setreuid((Uid_t)-1, uid);
1203 #ifdef HAS_SETRESUID
1204 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1210 if (geteuid() != uid)
1211 croak("Can't do seteuid!\n");
1213 #endif /* IAMSUID */
1214 rsfp = my_popen(buf,"r");
1216 else if (!*scriptname) {
1217 taint_not("program input from stdin");
1221 rsfp = fopen(scriptname,"r");
1222 if ((FILE*)rsfp == Nullfp) {
1224 #ifndef IAMSUID /* in case script is not readable before setuid */
1225 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1226 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1227 (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
1228 execv(buf, origargv); /* try again */
1229 croak("Can't do setuid\n");
1233 croak("Can't open perl script \"%s\": %s\n",
1234 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1239 validate_suid(validarg)
1242 /* do we need to emulate setuid on scripts? */
1244 /* This code is for those BSD systems that have setuid #! scripts disabled
1245 * in the kernel because of a security problem. Merely defining DOSUID
1246 * in perl will not fix that problem, but if you have disabled setuid
1247 * scripts in the kernel, this will attempt to emulate setuid and setgid
1248 * on scripts that have those now-otherwise-useless bits set. The setuid
1249 * root version must be called suidperl or sperlN.NNN. If regular perl
1250 * discovers that it has opened a setuid script, it calls suidperl with
1251 * the same argv that it had. If suidperl finds that the script it has
1252 * just opened is NOT setuid root, it sets the effective uid back to the
1253 * uid. We don't just make perl setuid root because that loses the
1254 * effective uid we had before invoking perl, if it was different from the
1257 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
1258 * be defined in suidperl only. suidperl must be setuid root. The
1259 * Configure script will set this up for you if you want it.
1265 if (Fstat(fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
1266 croak("Can't stat script \"%s\"",origfilename);
1267 if (statbuf.st_mode & (S_ISUID|S_ISGID)) {
1271 #ifndef HAS_SETREUID
1272 /* On this access check to make sure the directories are readable,
1273 * there is actually a small window that the user could use to make
1274 * filename point to an accessible directory. So there is a faint
1275 * chance that someone could execute a setuid script down in a
1276 * non-accessible directory. I don't know what to do about that.
1277 * But I don't think it's too important. The manual lies when
1278 * it says access() is useful in setuid programs.
1280 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
1281 croak("Permission denied");
1283 /* If we can swap euid and uid, then we can determine access rights
1284 * with a simple stat of the file, and then compare device and
1285 * inode to make sure we did stat() on the same file we opened.
1286 * Then we just have to make sure he or she can execute it.
1289 struct stat tmpstatbuf;
1293 setreuid(euid,uid) < 0
1296 setresuid(euid,uid,(Uid_t)-1) < 0
1299 || getuid() != euid || geteuid() != uid)
1300 croak("Can't swap uid and euid"); /* really paranoid */
1301 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
1302 croak("Permission denied"); /* testing full pathname here */
1303 if (tmpstatbuf.st_dev != statbuf.st_dev ||
1304 tmpstatbuf.st_ino != statbuf.st_ino) {
1306 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
1308 "User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\
1309 (Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n",
1310 uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino,
1311 statbuf.st_dev, statbuf.st_ino,
1312 SvPVX(GvSV(curcop->cop_filegv)),
1313 statbuf.st_uid, statbuf.st_gid);
1314 (void)my_pclose(rsfp);
1316 croak("Permission denied\n");
1320 setreuid(uid,euid) < 0
1322 # if defined(HAS_SETRESUID)
1323 setresuid(uid,euid,(Uid_t)-1) < 0
1326 || getuid() != uid || geteuid() != euid)
1327 croak("Can't reswap uid and euid");
1328 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
1329 croak("Permission denied\n");
1331 #endif /* HAS_SETREUID */
1332 #endif /* IAMSUID */
1334 if (!S_ISREG(statbuf.st_mode))
1335 croak("Permission denied");
1336 if (statbuf.st_mode & S_IWOTH)
1337 croak("Setuid/gid script is writable by world");
1338 doswitches = FALSE; /* -s is insecure in suid */
1340 if (fgets(tokenbuf,sizeof tokenbuf, rsfp) == Nullch ||
1341 strnNE(tokenbuf,"#!",2) ) /* required even on Sys V */
1342 croak("No #! line");
1345 while (!isSPACE(*s)) s++;
1346 if (strnNE(s-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
1347 croak("Not a perl script");
1348 while (*s == ' ' || *s == '\t') s++;
1350 * #! arg must be what we saw above. They can invoke it by
1351 * mentioning suidperl explicitly, but they may not add any strange
1352 * arguments beyond what #! says if they do invoke suidperl that way.
1354 len = strlen(validarg);
1355 if (strEQ(validarg," PHOOEY ") ||
1356 strnNE(s,validarg,len) || !isSPACE(s[len]))
1357 croak("Args must match #! line");
1360 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
1361 euid == statbuf.st_uid)
1363 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
1364 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
1365 #endif /* IAMSUID */
1367 if (euid) { /* oops, we're not the setuid root perl */
1370 (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
1371 execv(buf, origargv); /* try again */
1373 croak("Can't do setuid\n");
1376 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
1378 (void)setegid(statbuf.st_gid);
1381 (void)setregid((Gid_t)-1,statbuf.st_gid);
1383 #ifdef HAS_SETRESGID
1384 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
1386 setgid(statbuf.st_gid);
1390 if (getegid() != statbuf.st_gid)
1391 croak("Can't do setegid!\n");
1393 if (statbuf.st_mode & S_ISUID) {
1394 if (statbuf.st_uid != euid)
1396 (void)seteuid(statbuf.st_uid); /* all that for this */
1399 (void)setreuid((Uid_t)-1,statbuf.st_uid);
1401 #ifdef HAS_SETRESUID
1402 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
1404 setuid(statbuf.st_uid);
1408 if (geteuid() != statbuf.st_uid)
1409 croak("Can't do seteuid!\n");
1411 else if (uid) { /* oops, mustn't run as root */
1413 (void)seteuid((Uid_t)uid);
1416 (void)setreuid((Uid_t)-1,(Uid_t)uid);
1418 #ifdef HAS_SETRESUID
1419 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
1425 if (geteuid() != uid)
1426 croak("Can't do seteuid!\n");
1429 if (!cando(S_IXUSR,TRUE,&statbuf))
1430 croak("Permission denied\n"); /* they can't do this */
1433 else if (preprocess)
1434 croak("-P not allowed for setuid/setgid script\n");
1436 croak("Script is not setuid/setgid in suidperl\n");
1437 #endif /* IAMSUID */
1439 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
1440 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
1441 Fstat(fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
1442 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
1444 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
1447 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
1448 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
1449 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
1450 /* not set-id, must be wrapped */
1460 /* skip forward in input to the real script? */
1464 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
1465 croak("No Perl script found in input\n");
1466 if (*s == '#' && s[1] == '!' && instr(s,"perl")) {
1467 ungetc('\n',rsfp); /* to keep line count right */
1469 if (s = instr(s,"perl -")) {
1472 while (s = moreswitches(s)) ;
1474 if (cddir && chdir(cddir) < 0)
1475 croak("Can't chdir to %s",cddir);
1483 uid = (int)getuid();
1484 euid = (int)geteuid();
1485 gid = (int)getgid();
1486 egid = (int)getegid();
1491 tainting |= (euid != uid || egid != gid);
1497 curstash = debstash;
1498 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
1500 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
1501 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
1502 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1503 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
1504 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
1505 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
1506 curstash = defstash;
1513 mainstack = stack; /* remember in case we switch stacks */
1514 AvREAL_off(stack); /* not a real array */
1515 av_extend(stack,127);
1517 stack_base = AvARRAY(stack);
1518 stack_sp = stack_base;
1519 stack_max = stack_base + 127;
1521 New(54,markstack,64,I32);
1522 markstack_ptr = markstack;
1523 markstack_max = markstack + 64;
1525 New(54,scopestack,32,I32);
1527 scopestack_max = 32;
1529 New(54,savestack,128,ANY);
1531 savestack_max = 128;
1533 New(54,retstack,16,OP*);
1537 New(50,cxstack,128,CONTEXT);
1541 New(50,tmps_stack,128,SV*);
1546 New(51,debname,128,char);
1547 New(52,debdelim,128,char);
1551 static FILE *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
1559 subname = newSVpv("main",4);
1563 init_predump_symbols()
1568 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
1570 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
1571 SvMULTI_on(stdingv);
1572 IoIFP(GvIOp(stdingv)) = stdin;
1573 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
1574 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
1577 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
1579 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = stdout;
1581 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
1582 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
1585 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
1586 SvMULTI_on(othergv);
1587 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = stderr;
1588 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
1589 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
1592 statname = NEWSV(66,0); /* last filename we did stat on */
1596 init_postdump_symbols(argc,argv,env)
1598 register char **argv;
1599 register char **env;
1605 argc--,argv++; /* skip name of script */
1607 for (; argc > 0 && **argv == '-'; argc--,argv++) {
1610 if (argv[0][1] == '-') {
1614 if (s = strchr(argv[0], '=')) {
1616 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
1619 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
1622 toptarget = NEWSV(0,0);
1623 sv_upgrade(toptarget, SVt_PVFM);
1624 sv_setpvn(toptarget, "", 0);
1625 bodytarget = NEWSV(0,0);
1626 sv_upgrade(bodytarget, SVt_PVFM);
1627 sv_setpvn(bodytarget, "", 0);
1628 formtarget = bodytarget;
1631 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
1632 sv_setpv(GvSV(tmpgv),origfilename);
1633 magicname("0", "0", 1);
1635 if (tmpgv = gv_fetchpv("\024",TRUE, SVt_PV))
1637 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
1638 sv_setpv(GvSV(tmpgv),origargv[0]);
1639 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
1641 (void)gv_AVadd(argvgv);
1642 av_clear(GvAVn(argvgv));
1643 for (; argc > 0; argc--,argv++) {
1644 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
1647 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
1652 #ifndef VMS /* VMS doesn't have environ array */
1653 if (env != environ) {
1654 environ[0] = Nullch;
1655 hv_magic(hv, envgv, 'E');
1658 #ifdef DYNAMIC_ENV_FETCH
1659 HvNAME(hv) = savepv(ENV_HV_NAME);
1661 for (; *env; env++) {
1662 if (!(s = strchr(*env,'=')))
1665 sv = newSVpv(s--,0);
1666 sv_magic(sv, sv, 'e', *env, s - *env);
1667 (void)hv_store(hv, *env, s - *env, sv, 0);
1670 hv_magic(hv, envgv, 'E');
1673 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
1674 sv_setiv(GvSV(tmpgv),(I32)getpid());
1683 s = getenv("PERL5LIB");
1687 incpush(getenv("PERLLIB"));
1691 incpush(ARCHLIB_EXP);
1694 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
1696 incpush(PRIVLIB_EXP);
1698 av_push(GvAVn(incgv),newSVpv(".",1));
1707 line_t oldline = curcop->cop_line;
1709 Copy(top_env, oldtop, 1, jmp_buf);
1711 while (AvFILL(list) >= 0) {
1712 CV *cv = (CV*)av_shift(list);
1716 switch (setjmp(top_env)) {
1718 SV* atsv = GvSV(gv_fetchpv("@",TRUE, SVt_PV));
1720 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
1721 (void)SvPV(atsv, len);
1723 Copy(oldtop, top_env, 1, jmp_buf);
1724 curcop = &compiling;
1725 curcop->cop_line = oldline;
1726 if (list == beginav)
1727 sv_catpv(atsv, "BEGIN failed--compilation aborted");
1729 sv_catpv(atsv, "END failed--cleanup aborted");
1730 croak("%s", SvPVX(atsv));
1736 statusvalue = 255; /* XXX I don't think we use 1 anymore. */
1742 /* my_exit() was called */
1743 curstash = defstash;
1747 Copy(oldtop, top_env, 1, jmp_buf);
1748 curcop = &compiling;
1749 curcop->cop_line = oldline;
1751 if (list == beginav)
1752 croak("BEGIN failed--compilation aborted");
1754 croak("END failed--cleanup aborted");
1756 my_exit(statusvalue);
1761 fprintf(stderr, "panic: restartop\n");
1765 Copy(oldtop, top_env, 1, jmp_buf);
1766 curcop = &compiling;
1767 curcop->cop_line = oldline;
1768 longjmp(top_env, 3);
1772 Copy(oldtop, top_env, 1, jmp_buf);