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 ';'
838 # define PERLLIB_SEP '|'
840 # define PERLLIB_SEP ':'
853 /* Break at all separators */
855 /* First, skip any consecutive separators */
856 while ( *p == PERLLIB_SEP ) {
857 /* Uncomment the next line for PATH semantics */
858 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
861 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
862 av_push(GvAVn(incgv), newSVpv(p, (STRLEN)(s - p)));
865 av_push(GvAVn(incgv), newSVpv(p, 0));
871 /* This routine handles any switches that can be given during run */
881 nrschar = scan_oct(s, 4, &numlen);
882 nrs = savepvn("\n",1);
884 if (nrschar > 0377) {
888 else if (!nrschar && numlen >= 2) {
896 splitstr = savepv(s + 1);
919 static char debopts[] = "psltocPmfrxuLHXD";
922 for (s++; *s && (d = strchr(debopts,*s)); s++)
923 debug |= 1 << (d - debopts);
927 for (s++; isDIGIT(*s); s++) ;
931 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
932 for (s++; isALNUM(*s); s++) ;
939 inplace = savepv(s+1);
941 for (s = inplace; *s && !isSPACE(*s); s++) ;
948 for (e = s; *e && !isSPACE(*e); e++) ;
949 av_push(GvAVn(incgv),newSVpv(s,e-s));
954 croak("No space allowed after -I");
964 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
968 ors = savepvn(nrs,nrslen);
998 printf("\nThis is perl, version %s\n\n",patchlevel);
999 fputs("\nCopyright 1987-1994, Larry Wall\n",stdout);
1001 fputs("MS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n",
1004 fputs("OS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n",
1009 fputs("atariST series port, ++jrb bammi@cadence.com\n", stdout);
1012 Perl may be copied only under the terms of either the Artistic License or the\n\
1013 GNU General Public License, which may be found in the Perl 5.0 source kit.\n",stdout);
1024 if (s[1] == '-') /* Additional switches on #! line. */
1037 croak("Can't emulate -%.1s on #! line",s);
1042 /* compliments of Tom Christiansen */
1044 /* unexec() can be found in the Gnu emacs distribution */
1053 sprintf (buf, "%s.perldump", origfilename);
1054 sprintf (tokenbuf, "%s/perl", BIN);
1056 status = unexec(buf, tokenbuf, &etext, sbrk(0), 0);
1058 fprintf(stderr, "unexec of %s into %s failed!\n", tokenbuf, buf);
1061 ABORT(); /* for use with undump */
1069 curstash = defstash = newHV();
1070 curstname = newSVpv("main",4);
1071 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1072 SvREFCNT_dec(GvHV(gv));
1073 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1075 HvNAME(defstash) = savepv("main");
1076 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1078 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1079 curstash = defstash;
1080 compiling.cop_stash = defstash;
1081 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1084 #ifdef CAN_PROTOTYPE
1086 open_script(char *scriptname, bool dosearch, SV *sv)
1089 open_script(scriptname,dosearch,sv)
1095 char *xfound = Nullch;
1096 char *xfailed = Nullch;
1100 if (dosearch && !strchr(scriptname, '/') && (s = getenv("PATH"))) {
1102 bufend = s + strlen(s);
1105 s = cpytill(tokenbuf,s,bufend,':',&len);
1108 for (len = 0; *s && *s != ',' && *s != ';'; tokenbuf[len++] = *s++);
1109 tokenbuf[len] = '\0';
1111 for (len = 0; *s && *s != ';'; tokenbuf[len++] = *s++);
1112 tokenbuf[len] = '\0';
1118 if (len && tokenbuf[len-1] != '/')
1121 if (len && ((tokenbuf[len-1] != '\\') && (tokenbuf[len-1] != '/')))
1123 if (len && tokenbuf[len-1] != '\\')
1126 (void)strcat(tokenbuf+len,"/");
1127 (void)strcat(tokenbuf+len,scriptname);
1128 DEBUG_p(fprintf(stderr,"Looking for %s\n",tokenbuf));
1129 if (Stat(tokenbuf,&statbuf) < 0) /* not there? */
1131 if (S_ISREG(statbuf.st_mode)
1132 && cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) {
1133 xfound = tokenbuf; /* bingo! */
1137 xfailed = savepv(tokenbuf);
1140 croak("Can't execute %s", xfailed ? xfailed : scriptname );
1143 scriptname = xfound;
1146 origfilename = savepv(e_fp ? "-e" : scriptname);
1147 curcop->cop_filegv = gv_fetchfile(origfilename);
1148 if (strEQ(origfilename,"-"))
1151 char *cpp = CPPSTDIN;
1153 if (strEQ(cpp,"cppstdin"))
1154 sprintf(tokenbuf, "%s/%s", SCRIPTDIR, cpp);
1156 sprintf(tokenbuf, "%s", cpp);
1158 sv_catpv(sv,PRIVLIB_EXP);
1160 (void)sprintf(buf, "\
1161 sed %s -e \"/^[^#]/b\" \
1162 -e \"/^#[ ]*include[ ]/b\" \
1163 -e \"/^#[ ]*define[ ]/b\" \
1164 -e \"/^#[ ]*if[ ]/b\" \
1165 -e \"/^#[ ]*ifdef[ ]/b\" \
1166 -e \"/^#[ ]*ifndef[ ]/b\" \
1167 -e \"/^#[ ]*else/b\" \
1168 -e \"/^#[ ]*elif[ ]/b\" \
1169 -e \"/^#[ ]*undef[ ]/b\" \
1170 -e \"/^#[ ]*endif/b\" \
1173 (doextract ? "-e \"1,/^#/d\n\"" : ""),
1175 (void)sprintf(buf, "\
1176 %s %s -e '/^[^#]/b' \
1177 -e '/^#[ ]*include[ ]/b' \
1178 -e '/^#[ ]*define[ ]/b' \
1179 -e '/^#[ ]*if[ ]/b' \
1180 -e '/^#[ ]*ifdef[ ]/b' \
1181 -e '/^#[ ]*ifndef[ ]/b' \
1182 -e '/^#[ ]*else/b' \
1183 -e '/^#[ ]*elif[ ]/b' \
1184 -e '/^#[ ]*undef[ ]/b' \
1185 -e '/^#[ ]*endif/b' \
1193 (doextract ? "-e '1,/^#/d\n'" : ""),
1195 scriptname, tokenbuf, SvPV(sv, na), CPPMINUS);
1197 #ifdef IAMSUID /* actually, this is caught earlier */
1198 if (euid != uid && !euid) { /* if running suidperl */
1200 (void)seteuid(uid); /* musn't stay setuid root */
1203 (void)setreuid((Uid_t)-1, uid);
1205 #ifdef HAS_SETRESUID
1206 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
1212 if (geteuid() != uid)
1213 croak("Can't do seteuid!\n");
1215 #endif /* IAMSUID */
1216 rsfp = my_popen(buf,"r");
1218 else if (!*scriptname) {
1219 taint_not("program input from stdin");
1223 rsfp = fopen(scriptname,"r");
1224 if ((FILE*)rsfp == Nullfp) {
1226 #ifndef IAMSUID /* in case script is not readable before setuid */
1227 if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
1228 statbuf.st_mode & (S_ISUID|S_ISGID)) {
1229 (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
1230 execv(buf, origargv); /* try again */
1231 croak("Can't do setuid\n");
1235 croak("Can't open perl script \"%s\": %s\n",
1236 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
1241 validate_suid(validarg)
1244 /* do we need to emulate setuid on scripts? */
1246 /* This code is for those BSD systems that have setuid #! scripts disabled
1247 * in the kernel because of a security problem. Merely defining DOSUID
1248 * in perl will not fix that problem, but if you have disabled setuid
1249 * scripts in the kernel, this will attempt to emulate setuid and setgid
1250 * on scripts that have those now-otherwise-useless bits set. The setuid
1251 * root version must be called suidperl or sperlN.NNN. If regular perl
1252 * discovers that it has opened a setuid script, it calls suidperl with
1253 * the same argv that it had. If suidperl finds that the script it has
1254 * just opened is NOT setuid root, it sets the effective uid back to the
1255 * uid. We don't just make perl setuid root because that loses the
1256 * effective uid we had before invoking perl, if it was different from the
1259 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
1260 * be defined in suidperl only. suidperl must be setuid root. The
1261 * Configure script will set this up for you if you want it.
1267 if (Fstat(fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
1268 croak("Can't stat script \"%s\"",origfilename);
1269 if (statbuf.st_mode & (S_ISUID|S_ISGID)) {
1273 #ifndef HAS_SETREUID
1274 /* On this access check to make sure the directories are readable,
1275 * there is actually a small window that the user could use to make
1276 * filename point to an accessible directory. So there is a faint
1277 * chance that someone could execute a setuid script down in a
1278 * non-accessible directory. I don't know what to do about that.
1279 * But I don't think it's too important. The manual lies when
1280 * it says access() is useful in setuid programs.
1282 if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
1283 croak("Permission denied");
1285 /* If we can swap euid and uid, then we can determine access rights
1286 * with a simple stat of the file, and then compare device and
1287 * inode to make sure we did stat() on the same file we opened.
1288 * Then we just have to make sure he or she can execute it.
1291 struct stat tmpstatbuf;
1295 setreuid(euid,uid) < 0
1298 setresuid(euid,uid,(Uid_t)-1) < 0
1301 || getuid() != euid || geteuid() != uid)
1302 croak("Can't swap uid and euid"); /* really paranoid */
1303 if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
1304 croak("Permission denied"); /* testing full pathname here */
1305 if (tmpstatbuf.st_dev != statbuf.st_dev ||
1306 tmpstatbuf.st_ino != statbuf.st_ino) {
1308 if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
1310 "User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\
1311 (Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n",
1312 uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino,
1313 statbuf.st_dev, statbuf.st_ino,
1314 SvPVX(GvSV(curcop->cop_filegv)),
1315 statbuf.st_uid, statbuf.st_gid);
1316 (void)my_pclose(rsfp);
1318 croak("Permission denied\n");
1322 setreuid(uid,euid) < 0
1324 # if defined(HAS_SETRESUID)
1325 setresuid(uid,euid,(Uid_t)-1) < 0
1328 || getuid() != uid || geteuid() != euid)
1329 croak("Can't reswap uid and euid");
1330 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
1331 croak("Permission denied\n");
1333 #endif /* HAS_SETREUID */
1334 #endif /* IAMSUID */
1336 if (!S_ISREG(statbuf.st_mode))
1337 croak("Permission denied");
1338 if (statbuf.st_mode & S_IWOTH)
1339 croak("Setuid/gid script is writable by world");
1340 doswitches = FALSE; /* -s is insecure in suid */
1342 if (fgets(tokenbuf,sizeof tokenbuf, rsfp) == Nullch ||
1343 strnNE(tokenbuf,"#!",2) ) /* required even on Sys V */
1344 croak("No #! line");
1347 while (!isSPACE(*s)) s++;
1348 if (strnNE(s-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
1349 croak("Not a perl script");
1350 while (*s == ' ' || *s == '\t') s++;
1352 * #! arg must be what we saw above. They can invoke it by
1353 * mentioning suidperl explicitly, but they may not add any strange
1354 * arguments beyond what #! says if they do invoke suidperl that way.
1356 len = strlen(validarg);
1357 if (strEQ(validarg," PHOOEY ") ||
1358 strnNE(s,validarg,len) || !isSPACE(s[len]))
1359 croak("Args must match #! line");
1362 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
1363 euid == statbuf.st_uid)
1365 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
1366 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
1367 #endif /* IAMSUID */
1369 if (euid) { /* oops, we're not the setuid root perl */
1372 (void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
1373 execv(buf, origargv); /* try again */
1375 croak("Can't do setuid\n");
1378 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
1380 (void)setegid(statbuf.st_gid);
1383 (void)setregid((Gid_t)-1,statbuf.st_gid);
1385 #ifdef HAS_SETRESGID
1386 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
1388 setgid(statbuf.st_gid);
1392 if (getegid() != statbuf.st_gid)
1393 croak("Can't do setegid!\n");
1395 if (statbuf.st_mode & S_ISUID) {
1396 if (statbuf.st_uid != euid)
1398 (void)seteuid(statbuf.st_uid); /* all that for this */
1401 (void)setreuid((Uid_t)-1,statbuf.st_uid);
1403 #ifdef HAS_SETRESUID
1404 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
1406 setuid(statbuf.st_uid);
1410 if (geteuid() != statbuf.st_uid)
1411 croak("Can't do seteuid!\n");
1413 else if (uid) { /* oops, mustn't run as root */
1415 (void)seteuid((Uid_t)uid);
1418 (void)setreuid((Uid_t)-1,(Uid_t)uid);
1420 #ifdef HAS_SETRESUID
1421 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
1427 if (geteuid() != uid)
1428 croak("Can't do seteuid!\n");
1431 if (!cando(S_IXUSR,TRUE,&statbuf))
1432 croak("Permission denied\n"); /* they can't do this */
1435 else if (preprocess)
1436 croak("-P not allowed for setuid/setgid script\n");
1438 croak("Script is not setuid/setgid in suidperl\n");
1439 #endif /* IAMSUID */
1441 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
1442 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
1443 Fstat(fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
1444 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
1446 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
1449 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
1450 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
1451 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
1452 /* not set-id, must be wrapped */
1462 /* skip forward in input to the real script? */
1466 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
1467 croak("No Perl script found in input\n");
1468 if (*s == '#' && s[1] == '!' && instr(s,"perl")) {
1469 ungetc('\n',rsfp); /* to keep line count right */
1471 if (s = instr(s,"perl -")) {
1474 while (s = moreswitches(s)) ;
1476 if (cddir && chdir(cddir) < 0)
1477 croak("Can't chdir to %s",cddir);
1485 uid = (int)getuid();
1486 euid = (int)geteuid();
1487 gid = (int)getgid();
1488 egid = (int)getegid();
1493 tainting |= (euid != uid || egid != gid);
1499 curstash = debstash;
1500 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
1502 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
1503 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
1504 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
1505 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
1506 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
1507 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
1508 curstash = defstash;
1515 mainstack = stack; /* remember in case we switch stacks */
1516 AvREAL_off(stack); /* not a real array */
1517 av_extend(stack,127);
1519 stack_base = AvARRAY(stack);
1520 stack_sp = stack_base;
1521 stack_max = stack_base + 127;
1523 New(54,markstack,64,I32);
1524 markstack_ptr = markstack;
1525 markstack_max = markstack + 64;
1527 New(54,scopestack,32,I32);
1529 scopestack_max = 32;
1531 New(54,savestack,128,ANY);
1533 savestack_max = 128;
1535 New(54,retstack,16,OP*);
1539 New(50,cxstack,128,CONTEXT);
1543 New(50,tmps_stack,128,SV*);
1548 New(51,debname,128,char);
1549 New(52,debdelim,128,char);
1553 static FILE *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
1561 subname = newSVpv("main",4);
1565 init_predump_symbols()
1570 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
1572 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
1573 SvMULTI_on(stdingv);
1574 IoIFP(GvIOp(stdingv)) = stdin;
1575 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
1576 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
1579 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
1581 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = stdout;
1583 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
1584 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
1587 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
1588 SvMULTI_on(othergv);
1589 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = stderr;
1590 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
1591 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
1594 statname = NEWSV(66,0); /* last filename we did stat on */
1598 init_postdump_symbols(argc,argv,env)
1600 register char **argv;
1601 register char **env;
1607 argc--,argv++; /* skip name of script */
1609 for (; argc > 0 && **argv == '-'; argc--,argv++) {
1612 if (argv[0][1] == '-') {
1616 if (s = strchr(argv[0], '=')) {
1618 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
1621 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
1624 toptarget = NEWSV(0,0);
1625 sv_upgrade(toptarget, SVt_PVFM);
1626 sv_setpvn(toptarget, "", 0);
1627 bodytarget = NEWSV(0,0);
1628 sv_upgrade(bodytarget, SVt_PVFM);
1629 sv_setpvn(bodytarget, "", 0);
1630 formtarget = bodytarget;
1633 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
1634 sv_setpv(GvSV(tmpgv),origfilename);
1635 magicname("0", "0", 1);
1637 if (tmpgv = gv_fetchpv("\024",TRUE, SVt_PV))
1639 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
1640 sv_setpv(GvSV(tmpgv),origargv[0]);
1641 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
1643 (void)gv_AVadd(argvgv);
1644 av_clear(GvAVn(argvgv));
1645 for (; argc > 0; argc--,argv++) {
1646 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
1649 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
1654 #ifndef VMS /* VMS doesn't have environ array */
1655 if (env != environ) {
1656 environ[0] = Nullch;
1657 hv_magic(hv, envgv, 'E');
1660 #ifdef DYNAMIC_ENV_FETCH
1661 HvNAME(hv) = savepv(ENV_HV_NAME);
1663 for (; *env; env++) {
1664 if (!(s = strchr(*env,'=')))
1667 sv = newSVpv(s--,0);
1668 sv_magic(sv, sv, 'e', *env, s - *env);
1669 (void)hv_store(hv, *env, s - *env, sv, 0);
1672 hv_magic(hv, envgv, 'E');
1675 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
1676 sv_setiv(GvSV(tmpgv),(I32)getpid());
1685 s = getenv("PERL5LIB");
1689 incpush(getenv("PERLLIB"));
1693 incpush(ARCHLIB_EXP);
1696 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
1698 incpush(PRIVLIB_EXP);
1700 av_push(GvAVn(incgv),newSVpv(".",1));
1709 line_t oldline = curcop->cop_line;
1711 Copy(top_env, oldtop, 1, jmp_buf);
1713 while (AvFILL(list) >= 0) {
1714 CV *cv = (CV*)av_shift(list);
1718 switch (setjmp(top_env)) {
1720 SV* atsv = GvSV(gv_fetchpv("@",TRUE, SVt_PV));
1722 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
1723 (void)SvPV(atsv, len);
1725 Copy(oldtop, top_env, 1, jmp_buf);
1726 curcop = &compiling;
1727 curcop->cop_line = oldline;
1728 if (list == beginav)
1729 sv_catpv(atsv, "BEGIN failed--compilation aborted");
1731 sv_catpv(atsv, "END failed--cleanup aborted");
1732 croak("%s", SvPVX(atsv));
1738 statusvalue = 255; /* XXX I don't think we use 1 anymore. */
1744 /* my_exit() was called */
1745 curstash = defstash;
1749 Copy(oldtop, top_env, 1, jmp_buf);
1750 curcop = &compiling;
1751 curcop->cop_line = oldline;
1753 if (list == beginav)
1754 croak("BEGIN failed--compilation aborted");
1756 croak("END failed--cleanup aborted");
1758 my_exit(statusvalue);
1763 fprintf(stderr, "panic: restartop\n");
1767 Copy(oldtop, top_env, 1, jmp_buf);
1768 curcop = &compiling;
1769 curcop->cop_line = oldline;
1770 longjmp(top_env, 3);
1774 Copy(oldtop, top_env, 1, jmp_buf);