Commit | Line | Data |
---|---|---|
ac58e20f | 1 | char rcsid[] = "$Header: perly.c,v 3.0.1.4 90/02/28 18:06:41 lwall Locked $\nPatch level: ###\n"; |
8d063cd8 | 2 | /* |
a687059c LW |
3 | * Copyright (c) 1989, Larry Wall |
4 | * | |
5 | * You may distribute under the terms of the GNU General Public License | |
6 | * as specified in the README file that comes with the perl 3.0 kit. | |
7 | * | |
8d063cd8 | 8 | * $Log: perly.c,v $ |
ac58e20f LW |
9 | * Revision 3.0.1.4 90/02/28 18:06:41 lwall |
10 | * patch9: perl can now start up other interpreters scripts | |
11 | * patch9: nested evals clobbered their longjmp environment | |
12 | * patch9: eval could mistakenly return undef in array context | |
13 | * | |
663a0e37 LW |
14 | * Revision 3.0.1.3 89/12/21 20:15:41 lwall |
15 | * patch7: ANSI strerror() is now supported | |
16 | * patch7: errno may now be a macro with an lvalue | |
17 | * patch7: allowed setuid scripts to have a space after #! | |
18 | * | |
ffed7fef LW |
19 | * Revision 3.0.1.2 89/11/17 15:34:42 lwall |
20 | * patch5: fixed possible confusion about current effective gid | |
21 | * | |
ae986130 LW |
22 | * Revision 3.0.1.1 89/11/11 04:50:04 lwall |
23 | * patch2: moved yydebug to where its type didn't matter | |
24 | * | |
a687059c LW |
25 | * Revision 3.0 89/10/18 15:22:21 lwall |
26 | * 3.0 baseline | |
8d063cd8 LW |
27 | * |
28 | */ | |
29 | ||
378cc40b LW |
30 | #include "EXTERN.h" |
31 | #include "perl.h" | |
32 | #include "perly.h" | |
a687059c | 33 | #include "patchlevel.h" |
378cc40b | 34 | |
a687059c LW |
35 | #ifdef IAMSUID |
36 | #ifndef DOSUID | |
37 | #define DOSUID | |
38 | #endif | |
39 | #endif | |
378cc40b | 40 | |
a687059c LW |
41 | #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW |
42 | #ifdef DOSUID | |
43 | #undef DOSUID | |
44 | #endif | |
45 | #endif | |
8d063cd8 LW |
46 | |
47 | main(argc,argv,env) | |
48 | register int argc; | |
49 | register char **argv; | |
50 | register char **env; | |
51 | { | |
52 | register STR *str; | |
53 | register char *s; | |
378cc40b LW |
54 | char *index(), *strcpy(), *getenv(); |
55 | bool dosearch = FALSE; | |
a687059c | 56 | #ifdef DOSUID |
13281fa4 LW |
57 | char *validarg = ""; |
58 | #endif | |
8d063cd8 | 59 | |
a687059c LW |
60 | #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW |
61 | #ifdef IAMSUID | |
62 | #undef IAMSUID | |
63 | fatal("suidperl is no longer needed since the kernel can now execute\n\ | |
64 | setuid perl scripts securely.\n"); | |
65 | #endif | |
66 | #endif | |
67 | ||
ac58e20f LW |
68 | origargv = argv; |
69 | origargc = argc; | |
378cc40b LW |
70 | uid = (int)getuid(); |
71 | euid = (int)geteuid(); | |
a687059c LW |
72 | gid = (int)getgid(); |
73 | egid = (int)getegid(); | |
74 | if (do_undump) { | |
75 | do_undump = 0; | |
ac58e20f | 76 | loop_ptr = -1; /* start label stack again */ |
a687059c LW |
77 | goto just_doit; |
78 | } | |
79 | (void)sprintf(index(rcsid,'#'), "%d\n", PATCHLEVEL); | |
80 | linestr = Str_new(65,80); | |
378cc40b | 81 | str_nset(linestr,"",0); |
a687059c LW |
82 | str = str_make("",0); /* first used for -I flags */ |
83 | curstash = defstash = hnew(0); | |
84 | curstname = str_make("main",4); | |
85 | stab_xhash(stabent("_main",TRUE)) = defstash; | |
378cc40b | 86 | incstab = aadd(stabent("INC",TRUE)); |
a687059c | 87 | incstab->str_pok |= SP_MULTI; |
8d063cd8 LW |
88 | for (argc--,argv++; argc; argc--,argv++) { |
89 | if (argv[0][0] != '-' || !argv[0][1]) | |
90 | break; | |
13281fa4 LW |
91 | #ifdef DOSUID |
92 | if (*validarg) | |
93 | validarg = " PHOOEY "; | |
94 | else | |
95 | validarg = argv[0]; | |
96 | #endif | |
97 | s = argv[0]+1; | |
8d063cd8 | 98 | reswitch: |
13281fa4 | 99 | switch (*s) { |
378cc40b LW |
100 | case 'a': |
101 | minus_a = TRUE; | |
13281fa4 | 102 | s++; |
378cc40b | 103 | goto reswitch; |
a687059c LW |
104 | case 'd': |
105 | #ifdef TAINT | |
106 | if (euid != uid || egid != gid) | |
107 | fatal("No -d allowed in setuid scripts"); | |
108 | #endif | |
109 | perldb = TRUE; | |
110 | s++; | |
111 | goto reswitch; | |
8d063cd8 | 112 | case 'D': |
ae986130 | 113 | #ifdef DEBUGGING |
a687059c LW |
114 | #ifdef TAINT |
115 | if (euid != uid || egid != gid) | |
116 | fatal("No -D allowed in setuid scripts"); | |
117 | #endif | |
13281fa4 | 118 | debug = atoi(s+1); |
ae986130 LW |
119 | #else |
120 | warn("Recompile perl with -DDEBUGGING to use -D switch\n"); | |
8d063cd8 LW |
121 | #endif |
122 | break; | |
8d063cd8 | 123 | case 'e': |
a687059c LW |
124 | #ifdef TAINT |
125 | if (euid != uid || egid != gid) | |
126 | fatal("No -e allowed in setuid scripts"); | |
127 | #endif | |
8d063cd8 | 128 | if (!e_fp) { |
a687059c LW |
129 | e_tmpname = savestr(TMPPATH); |
130 | (void)mktemp(e_tmpname); | |
8d063cd8 LW |
131 | e_fp = fopen(e_tmpname,"w"); |
132 | } | |
133 | if (argv[1]) | |
134 | fputs(argv[1],e_fp); | |
a687059c | 135 | (void)putc('\n', e_fp); |
8d063cd8 LW |
136 | argc--,argv++; |
137 | break; | |
138 | case 'i': | |
13281fa4 | 139 | inplace = savestr(s+1); |
8d063cd8 LW |
140 | argvoutstab = stabent("ARGVOUT",TRUE); |
141 | break; | |
142 | case 'I': | |
a687059c LW |
143 | #ifdef TAINT |
144 | if (euid != uid || egid != gid) | |
145 | fatal("No -I allowed in setuid scripts"); | |
146 | #endif | |
13281fa4 LW |
147 | str_cat(str,"-"); |
148 | str_cat(str,s); | |
8d063cd8 | 149 | str_cat(str," "); |
a687059c LW |
150 | if (*++s) { |
151 | (void)apush(stab_array(incstab),str_make(s,0)); | |
378cc40b LW |
152 | } |
153 | else { | |
a687059c | 154 | (void)apush(stab_array(incstab),str_make(argv[1],0)); |
8d063cd8 LW |
155 | str_cat(str,argv[1]); |
156 | argc--,argv++; | |
157 | str_cat(str," "); | |
158 | } | |
159 | break; | |
160 | case 'n': | |
378cc40b | 161 | minus_n = TRUE; |
13281fa4 | 162 | s++; |
8d063cd8 LW |
163 | goto reswitch; |
164 | case 'p': | |
378cc40b | 165 | minus_p = TRUE; |
13281fa4 | 166 | s++; |
8d063cd8 LW |
167 | goto reswitch; |
168 | case 'P': | |
a687059c LW |
169 | #ifdef TAINT |
170 | if (euid != uid || egid != gid) | |
171 | fatal("No -P allowed in setuid scripts"); | |
172 | #endif | |
8d063cd8 | 173 | preprocess = TRUE; |
13281fa4 | 174 | s++; |
8d063cd8 LW |
175 | goto reswitch; |
176 | case 's': | |
a687059c LW |
177 | #ifdef TAINT |
178 | if (euid != uid || egid != gid) | |
179 | fatal("No -s allowed in setuid scripts"); | |
180 | #endif | |
8d063cd8 | 181 | doswitches = TRUE; |
13281fa4 | 182 | s++; |
8d063cd8 | 183 | goto reswitch; |
378cc40b LW |
184 | case 'S': |
185 | dosearch = TRUE; | |
13281fa4 | 186 | s++; |
378cc40b | 187 | goto reswitch; |
a687059c LW |
188 | case 'u': |
189 | do_undump = TRUE; | |
190 | s++; | |
191 | goto reswitch; | |
378cc40b LW |
192 | case 'U': |
193 | unsafe = TRUE; | |
13281fa4 | 194 | s++; |
378cc40b | 195 | goto reswitch; |
8d063cd8 | 196 | case 'v': |
a687059c LW |
197 | fputs(rcsid,stdout); |
198 | fputs("\nCopyright (c) 1989, Larry Wall\n\n\ | |
199 | Perl may be copied only under the terms of the GNU General Public License,\n\ | |
200 | a copy of which can be found with the Perl 3.0 distribution kit.\n",stdout); | |
8d063cd8 | 201 | exit(0); |
378cc40b LW |
202 | case 'w': |
203 | dowarn = TRUE; | |
13281fa4 | 204 | s++; |
378cc40b | 205 | goto reswitch; |
8d063cd8 LW |
206 | case '-': |
207 | argc--,argv++; | |
208 | goto switch_end; | |
209 | case 0: | |
210 | break; | |
211 | default: | |
13281fa4 | 212 | fatal("Unrecognized switch: -%s",s); |
8d063cd8 LW |
213 | } |
214 | } | |
215 | switch_end: | |
216 | if (e_fp) { | |
a687059c | 217 | (void)fclose(e_fp); |
8d063cd8 LW |
218 | argc++,argv--; |
219 | argv[0] = e_tmpname; | |
220 | } | |
378cc40b LW |
221 | #ifndef PRIVLIB |
222 | #define PRIVLIB "/usr/local/lib/perl" | |
223 | #endif | |
a687059c | 224 | (void)apush(stab_array(incstab),str_make(PRIVLIB,0)); |
8d063cd8 LW |
225 | |
226 | str_set(&str_no,No); | |
227 | str_set(&str_yes,Yes); | |
8d063cd8 LW |
228 | |
229 | /* open script */ | |
230 | ||
231 | if (argv[0] == Nullch) | |
232 | argv[0] = "-"; | |
a687059c | 233 | if (dosearch && !index(argv[0], '/') && (s = getenv("PATH"))) { |
378cc40b | 234 | char *xfound = Nullch, *xfailed = Nullch; |
a687059c | 235 | int len; |
378cc40b | 236 | |
a687059c | 237 | bufend = s + strlen(s); |
378cc40b | 238 | while (*s) { |
a687059c | 239 | s = cpytill(tokenbuf,s,bufend,':',&len); |
378cc40b LW |
240 | if (*s) |
241 | s++; | |
a687059c LW |
242 | if (len) |
243 | (void)strcat(tokenbuf+len,"/"); | |
244 | (void)strcat(tokenbuf+len,argv[0]); | |
378cc40b LW |
245 | #ifdef DEBUGGING |
246 | if (debug & 1) | |
247 | fprintf(stderr,"Looking for %s\n",tokenbuf); | |
248 | #endif | |
249 | if (stat(tokenbuf,&statbuf) < 0) /* not there? */ | |
250 | continue; | |
251 | if ((statbuf.st_mode & S_IFMT) == S_IFREG | |
a687059c | 252 | && cando(S_IREAD,TRUE,&statbuf) && cando(S_IEXEC,TRUE,&statbuf)) { |
378cc40b LW |
253 | xfound = tokenbuf; /* bingo! */ |
254 | break; | |
255 | } | |
256 | if (!xfailed) | |
257 | xfailed = savestr(tokenbuf); | |
258 | } | |
259 | if (!xfound) | |
a687059c | 260 | fatal("Can't execute %s", xfailed ? xfailed : argv[0] ); |
378cc40b | 261 | if (xfailed) |
a687059c | 262 | Safefree(xfailed); |
378cc40b LW |
263 | argv[0] = savestr(xfound); |
264 | } | |
a687059c LW |
265 | |
266 | pidstatary = anew(Nullstab); /* for remembering popen pids, status */ | |
267 | ||
8d063cd8 | 268 | filename = savestr(argv[0]); |
378cc40b | 269 | origfilename = savestr(filename); |
8d063cd8 LW |
270 | if (strEQ(filename,"-")) |
271 | argv[0] = ""; | |
272 | if (preprocess) { | |
378cc40b LW |
273 | str_cat(str,"-I"); |
274 | str_cat(str,PRIVLIB); | |
a687059c | 275 | (void)sprintf(buf, "\ |
8d063cd8 LW |
276 | /bin/sed -e '/^[^#]/b' \ |
277 | -e '/^#[ ]*include[ ]/b' \ | |
278 | -e '/^#[ ]*define[ ]/b' \ | |
279 | -e '/^#[ ]*if[ ]/b' \ | |
280 | -e '/^#[ ]*ifdef[ ]/b' \ | |
378cc40b | 281 | -e '/^#[ ]*ifndef[ ]/b' \ |
8d063cd8 LW |
282 | -e '/^#[ ]*else/b' \ |
283 | -e '/^#[ ]*endif/b' \ | |
284 | -e 's/^#.*//' \ | |
378cc40b LW |
285 | %s | %s -C %s %s", |
286 | argv[0], CPPSTDIN, str_get(str), CPPMINUS); | |
a687059c | 287 | #ifdef IAMSUID /* actually, this is caught earlier */ |
13281fa4 | 288 | if (euid != uid && !euid) /* if running suidperl */ |
a687059c LW |
289 | #ifdef SETEUID |
290 | (void)seteuid(uid); /* musn't stay setuid root */ | |
291 | #else | |
292 | #ifdef SETREUID | |
293 | (void)setreuid(-1, uid); | |
294 | #else | |
295 | setuid(uid); | |
296 | #endif | |
13281fa4 | 297 | #endif |
a687059c LW |
298 | #endif /* IAMSUID */ |
299 | rsfp = mypopen(buf,"r"); | |
8d063cd8 LW |
300 | } |
301 | else if (!*argv[0]) | |
302 | rsfp = stdin; | |
303 | else | |
304 | rsfp = fopen(argv[0],"r"); | |
13281fa4 LW |
305 | if (rsfp == Nullfp) { |
306 | #ifdef DOSUID | |
a687059c | 307 | #ifndef IAMSUID /* in case script is not readable before setuid */ |
13281fa4 LW |
308 | if (euid && stat(filename,&statbuf) >= 0 && |
309 | statbuf.st_mode & (S_ISUID|S_ISGID)) { | |
a687059c LW |
310 | (void)sprintf(buf, "%s/%s", BIN, "suidperl"); |
311 | execv(buf, origargv); /* try again */ | |
13281fa4 LW |
312 | fatal("Can't do setuid\n"); |
313 | } | |
314 | #endif | |
315 | #endif | |
a687059c | 316 | fatal("Can't open perl script \"%s\": %s\n", |
663a0e37 | 317 | filename, strerror(errno)); |
13281fa4 | 318 | } |
8d063cd8 LW |
319 | str_free(str); /* free -I directories */ |
320 | ||
13281fa4 LW |
321 | /* do we need to emulate setuid on scripts? */ |
322 | ||
323 | /* This code is for those BSD systems that have setuid #! scripts disabled | |
324 | * in the kernel because of a security problem. Merely defining DOSUID | |
325 | * in perl will not fix that problem, but if you have disabled setuid | |
326 | * scripts in the kernel, this will attempt to emulate setuid and setgid | |
327 | * on scripts that have those now-otherwise-useless bits set. The setuid | |
328 | * root version must be called suidperl. If regular perl discovers that | |
329 | * it has opened a setuid script, it calls suidperl with the same argv | |
330 | * that it had. If suidperl finds that the script it has just opened | |
331 | * is NOT setuid root, it sets the effective uid back to the uid. We | |
332 | * don't just make perl setuid root because that loses the effective | |
333 | * uid we had before invoking perl, if it was different from the uid. | |
334 | * | |
335 | * DOSUID must be defined in both perl and suidperl, and IAMSUID must | |
336 | * be defined in suidperl only. suidperl must be setuid root. The | |
337 | * Configure script will set this up for you if you want it. | |
a687059c LW |
338 | * |
339 | * There is also the possibility of have a script which is running | |
340 | * set-id due to a C wrapper. We want to do the TAINT checks | |
341 | * on these set-id scripts, but don't want to have the overhead of | |
342 | * them in normal perl, and can't use suidperl because it will lose | |
343 | * the effective uid info, so we have an additional non-setuid root | |
344 | * version called taintperl that just does the TAINT checks. | |
13281fa4 | 345 | */ |
a687059c | 346 | |
13281fa4 LW |
347 | #ifdef DOSUID |
348 | if (fstat(fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */ | |
349 | fatal("Can't stat script \"%s\"",filename); | |
350 | if (statbuf.st_mode & (S_ISUID|S_ISGID)) { | |
351 | int len; | |
352 | ||
a687059c LW |
353 | #ifdef IAMSUID |
354 | #ifndef SETREUID | |
355 | /* On this access check to make sure the directories are readable, | |
356 | * there is actually a small window that the user could use to make | |
357 | * filename point to an accessible directory. So there is a faint | |
358 | * chance that someone could execute a setuid script down in a | |
359 | * non-accessible directory. I don't know what to do about that. | |
360 | * But I don't think it's too important. The manual lies when | |
361 | * it says access() is useful in setuid programs. | |
362 | */ | |
13281fa4 LW |
363 | if (access(filename,1)) /* as a double check */ |
364 | fatal("Permission denied"); | |
a687059c LW |
365 | #else |
366 | /* If we can swap euid and uid, then we can determine access rights | |
367 | * with a simple stat of the file, and then compare device and | |
368 | * inode to make sure we did stat() on the same file we opened. | |
369 | * Then we just have to make sure he or she can execute it. | |
370 | */ | |
371 | { | |
372 | struct stat tmpstatbuf; | |
373 | ||
374 | if (setreuid(euid,uid) < 0 || getuid() != euid || geteuid() != uid) | |
375 | fatal("Can't swap uid and euid"); /* really paranoid */ | |
376 | if (stat(filename,&tmpstatbuf) < 0) /* testing full pathname here */ | |
377 | fatal("Permission denied"); | |
378 | if (tmpstatbuf.st_dev != statbuf.st_dev || | |
379 | tmpstatbuf.st_ino != statbuf.st_ino) { | |
380 | (void)fclose(rsfp); | |
381 | if (rsfp = mypopen("/bin/mail root","w")) { /* heh, heh */ | |
382 | fprintf(rsfp, | |
383 | "User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\ | |
384 | (Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n", | |
385 | uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino, | |
386 | statbuf.st_dev, statbuf.st_ino, | |
387 | filename, statbuf.st_uid, statbuf.st_gid); | |
388 | (void)mypclose(rsfp); | |
389 | } | |
390 | fatal("Permission denied\n"); | |
391 | } | |
392 | if (setreuid(uid,euid) < 0 || getuid() != uid || geteuid() != euid) | |
393 | fatal("Can't reswap uid and euid"); | |
394 | if (!cando(S_IEXEC,FALSE,&statbuf)) /* can real uid exec? */ | |
395 | fatal("Permission denied\n"); | |
396 | } | |
397 | #endif /* SETREUID */ | |
398 | #endif /* IAMSUID */ | |
399 | ||
13281fa4 LW |
400 | if ((statbuf.st_mode & S_IFMT) != S_IFREG) |
401 | fatal("Permission denied"); | |
a687059c LW |
402 | if ((statbuf.st_mode >> 6) & S_IWRITE) |
403 | fatal("Setuid/gid script is writable by world"); | |
13281fa4 LW |
404 | doswitches = FALSE; /* -s is insecure in suid */ |
405 | line++; | |
406 | if (fgets(tokenbuf,sizeof tokenbuf, rsfp) == Nullch || | |
407 | strnNE(tokenbuf,"#!",2) ) /* required even on Sys V */ | |
408 | fatal("No #! line"); | |
663a0e37 LW |
409 | s = tokenbuf+2; |
410 | if (*s == ' ') s++; | |
411 | while (!isspace(*s)) s++; | |
13281fa4 LW |
412 | if (strnNE(s-4,"perl",4)) /* sanity check */ |
413 | fatal("Not a perl script"); | |
a687059c | 414 | while (*s == ' ' || *s == '\t') s++; |
13281fa4 LW |
415 | /* |
416 | * #! arg must be what we saw above. They can invoke it by | |
417 | * mentioning suidperl explicitly, but they may not add any strange | |
418 | * arguments beyond what #! says if they do invoke suidperl that way. | |
419 | */ | |
420 | len = strlen(validarg); | |
421 | if (strEQ(validarg," PHOOEY ") || | |
422 | strnNE(s,validarg,len) || !isspace(s[len])) | |
a687059c LW |
423 | fatal("Args must match #! line"); |
424 | ||
425 | #ifndef IAMSUID | |
426 | if (euid != uid && (statbuf.st_mode & S_ISUID) && | |
427 | euid == statbuf.st_uid) | |
428 | if (!do_undump) | |
429 | fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ | |
430 | FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n"); | |
431 | #endif /* IAMSUID */ | |
13281fa4 LW |
432 | |
433 | if (euid) { /* oops, we're not the setuid root perl */ | |
a687059c | 434 | (void)fclose(rsfp); |
13281fa4 | 435 | #ifndef IAMSUID |
a687059c LW |
436 | (void)sprintf(buf, "%s/%s", BIN, "suidperl"); |
437 | execv(buf, origargv); /* try again */ | |
13281fa4 LW |
438 | #endif |
439 | fatal("Can't do setuid\n"); | |
440 | } | |
441 | ||
ffed7fef | 442 | if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) |
a687059c LW |
443 | #ifdef SETEGID |
444 | (void)setegid(statbuf.st_gid); | |
445 | #else | |
446 | #ifdef SETREGID | |
447 | (void)setregid((GIDTYPE)-1,statbuf.st_gid); | |
448 | #else | |
449 | setgid(statbuf.st_gid); | |
450 | #endif | |
451 | #endif | |
452 | if (statbuf.st_mode & S_ISUID) { | |
453 | if (statbuf.st_uid != euid) | |
454 | #ifdef SETEUID | |
455 | (void)seteuid(statbuf.st_uid); /* all that for this */ | |
456 | #else | |
457 | #ifdef SETREUID | |
458 | (void)setreuid((UIDTYPE)-1,statbuf.st_uid); | |
459 | #else | |
460 | setuid(statbuf.st_uid); | |
461 | #endif | |
462 | #endif | |
463 | } | |
464 | else if (uid) /* oops, mustn't run as root */ | |
465 | #ifdef SETEUID | |
466 | (void)seteuid((UIDTYPE)uid); | |
467 | #else | |
468 | #ifdef SETREUID | |
469 | (void)setreuid((UIDTYPE)-1,(UIDTYPE)uid); | |
470 | #else | |
471 | setuid((UIDTYPE)uid); | |
472 | #endif | |
473 | #endif | |
ffed7fef | 474 | uid = (int)getuid(); |
13281fa4 | 475 | euid = (int)geteuid(); |
ffed7fef LW |
476 | gid = (int)getgid(); |
477 | egid = (int)getegid(); | |
a687059c | 478 | if (!cando(S_IEXEC,TRUE,&statbuf)) |
13281fa4 LW |
479 | fatal("Permission denied\n"); /* they can't do this */ |
480 | } | |
481 | #ifdef IAMSUID | |
482 | else if (preprocess) | |
483 | fatal("-P not allowed for setuid/setgid script\n"); | |
484 | else | |
485 | fatal("Script is not setuid/setgid in suidperl\n"); | |
a687059c LW |
486 | #else |
487 | #ifndef TAINT /* we aren't taintperl or suidperl */ | |
488 | /* script has a wrapper--can't run suidperl or we lose euid */ | |
489 | else if (euid != uid || egid != gid) { | |
490 | (void)fclose(rsfp); | |
491 | (void)sprintf(buf, "%s/%s", BIN, "taintperl"); | |
492 | execv(buf, origargv); /* try again */ | |
493 | fatal("Can't run setuid script with taint checks"); | |
494 | } | |
495 | #endif /* TAINT */ | |
13281fa4 | 496 | #endif /* IAMSUID */ |
a687059c LW |
497 | #else /* !DOSUID */ |
498 | #ifndef TAINT /* we aren't taintperl or suidperl */ | |
499 | if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */ | |
500 | #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW | |
501 | fstat(fileno(rsfp),&statbuf); /* may be either wrapped or real suid */ | |
502 | if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID) | |
503 | || | |
504 | (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID) | |
505 | ) | |
506 | if (!do_undump) | |
507 | fatal("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ | |
508 | FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n"); | |
509 | #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */ | |
510 | /* not set-id, must be wrapped */ | |
511 | (void)fclose(rsfp); | |
512 | (void)sprintf(buf, "%s/%s", BIN, "taintperl"); | |
513 | execv(buf, origargv); /* try again */ | |
514 | fatal("Can't run setuid script with taint checks"); | |
515 | } | |
516 | #endif /* TAINT */ | |
13281fa4 LW |
517 | #endif /* DOSUID */ |
518 | ||
8d063cd8 LW |
519 | defstab = stabent("_",TRUE); |
520 | ||
a687059c LW |
521 | if (perldb) { |
522 | debstash = hnew(0); | |
523 | stab_xhash(stabent("_DB",TRUE)) = debstash; | |
524 | curstash = debstash; | |
525 | lineary = stab_xarray(aadd((tmpstab = stabent("line",TRUE)))); | |
526 | tmpstab->str_pok |= SP_MULTI; | |
527 | subname = str_make("main",4); | |
528 | DBstab = stabent("DB",TRUE); | |
529 | DBstab->str_pok |= SP_MULTI; | |
530 | DBsub = hadd(tmpstab = stabent("sub",TRUE)); | |
531 | tmpstab->str_pok |= SP_MULTI; | |
532 | DBsingle = stab_val((tmpstab = stabent("single",TRUE))); | |
533 | tmpstab->str_pok |= SP_MULTI; | |
534 | curstash = defstash; | |
535 | } | |
536 | ||
8d063cd8 LW |
537 | /* init tokener */ |
538 | ||
a687059c LW |
539 | bufend = bufptr = str_get(linestr); |
540 | ||
541 | savestack = anew(Nullstab); /* for saving non-local values */ | |
542 | stack = anew(Nullstab); /* for saving non-local values */ | |
543 | stack->ary_flags = 0; /* not a real array */ | |
8d063cd8 | 544 | |
a687059c | 545 | /* now parse the script */ |
8d063cd8 | 546 | |
a687059c LW |
547 | error_count = 0; |
548 | if (yyparse() || error_count) | |
8d063cd8 LW |
549 | fatal("Execution aborted due to compilation errors.\n"); |
550 | ||
a687059c | 551 | New(50,loop_stack,128,struct loop); |
ae986130 LW |
552 | #ifdef DEBUGGING |
553 | if (debug) { | |
554 | New(51,debname,128,char); | |
555 | New(52,debdelim,128,char); | |
556 | } | |
557 | #endif | |
a687059c | 558 | curstash = defstash; |
378cc40b LW |
559 | |
560 | preprocess = FALSE; | |
8d063cd8 LW |
561 | if (e_fp) { |
562 | e_fp = Nullfp; | |
a687059c LW |
563 | (void)UNLINK(e_tmpname); |
564 | } | |
565 | ||
566 | /* initialize everything that won't change if we undump */ | |
567 | ||
568 | if (sigstab = stabent("SIG",allstabs)) { | |
569 | sigstab->str_pok |= SP_MULTI; | |
570 | (void)hadd(sigstab); | |
571 | } | |
572 | ||
573 | magicalize("!#?^~=-%0123456789.+&*()<>,\\/[|`':"); | |
574 | ||
575 | amperstab = stabent("&",allstabs); | |
576 | leftstab = stabent("`",allstabs); | |
577 | rightstab = stabent("'",allstabs); | |
578 | sawampersand = (amperstab || leftstab || rightstab); | |
579 | if (tmpstab = stabent(":",allstabs)) | |
580 | str_set(STAB_STR(tmpstab),chopset); | |
581 | ||
582 | /* these aren't necessarily magical */ | |
583 | if (tmpstab = stabent(";",allstabs)) | |
584 | str_set(STAB_STR(tmpstab),"\034"); | |
585 | #ifdef TAINT | |
586 | tainted = 1; | |
587 | #endif | |
588 | if (tmpstab = stabent("0",allstabs)) | |
589 | str_set(STAB_STR(tmpstab),origfilename); | |
590 | #ifdef TAINT | |
591 | tainted = 0; | |
592 | #endif | |
593 | if (tmpstab = stabent("]",allstabs)) | |
594 | str_set(STAB_STR(tmpstab),rcsid); | |
595 | str_nset(stab_val(stabent("\"", TRUE)), " ", 1); | |
596 | ||
597 | stdinstab = stabent("STDIN",TRUE); | |
598 | stdinstab->str_pok |= SP_MULTI; | |
599 | stab_io(stdinstab) = stio_new(); | |
600 | stab_io(stdinstab)->ifp = stdin; | |
601 | tmpstab = stabent("stdin",TRUE); | |
602 | stab_io(tmpstab) = stab_io(stdinstab); | |
603 | tmpstab->str_pok |= SP_MULTI; | |
604 | ||
605 | tmpstab = stabent("STDOUT",TRUE); | |
606 | tmpstab->str_pok |= SP_MULTI; | |
607 | stab_io(tmpstab) = stio_new(); | |
608 | stab_io(tmpstab)->ofp = stab_io(tmpstab)->ifp = stdout; | |
609 | defoutstab = tmpstab; | |
610 | tmpstab = stabent("stdout",TRUE); | |
611 | stab_io(tmpstab) = stab_io(defoutstab); | |
612 | tmpstab->str_pok |= SP_MULTI; | |
613 | ||
614 | curoutstab = stabent("STDERR",TRUE); | |
615 | curoutstab->str_pok |= SP_MULTI; | |
616 | stab_io(curoutstab) = stio_new(); | |
617 | stab_io(curoutstab)->ofp = stab_io(curoutstab)->ifp = stderr; | |
618 | tmpstab = stabent("stderr",TRUE); | |
619 | stab_io(tmpstab) = stab_io(curoutstab); | |
620 | tmpstab->str_pok |= SP_MULTI; | |
621 | curoutstab = defoutstab; /* switch back to STDOUT */ | |
622 | ||
623 | statname = Str_new(66,0); /* last filename we did stat on */ | |
624 | ||
625 | perldb = FALSE; /* don't try to instrument evals */ | |
626 | ||
627 | if (dowarn) { | |
628 | stab_check('A','Z'); | |
629 | stab_check('a','z'); | |
8d063cd8 | 630 | } |
a687059c LW |
631 | |
632 | if (do_undump) | |
633 | abort(); | |
634 | ||
635 | just_doit: /* come here if running an undumped a.out */ | |
8d063cd8 LW |
636 | argc--,argv++; /* skip name of script */ |
637 | if (doswitches) { | |
638 | for (; argc > 0 && **argv == '-'; argc--,argv++) { | |
639 | if (argv[0][1] == '-') { | |
640 | argc--,argv++; | |
641 | break; | |
642 | } | |
a687059c | 643 | str_numset(stab_val(stabent(argv[0]+1,TRUE)),(double)1.0); |
8d063cd8 LW |
644 | } |
645 | } | |
a687059c LW |
646 | #ifdef TAINT |
647 | tainted = 1; | |
648 | #endif | |
a559c259 | 649 | if (argvstab = stabent("ARGV",allstabs)) { |
a687059c LW |
650 | argvstab->str_pok |= SP_MULTI; |
651 | (void)aadd(argvstab); | |
8d063cd8 | 652 | for (; argc > 0; argc--,argv++) { |
a687059c | 653 | (void)apush(stab_array(argvstab),str_make(argv[0],0)); |
8d063cd8 LW |
654 | } |
655 | } | |
a687059c LW |
656 | #ifdef TAINT |
657 | (void) stabent("ENV",TRUE); /* must test PATH and IFS */ | |
658 | #endif | |
a559c259 | 659 | if (envstab = stabent("ENV",allstabs)) { |
a687059c LW |
660 | envstab->str_pok |= SP_MULTI; |
661 | (void)hadd(envstab); | |
8d063cd8 LW |
662 | for (; *env; env++) { |
663 | if (!(s = index(*env,'='))) | |
664 | continue; | |
665 | *s++ = '\0'; | |
a687059c LW |
666 | str = str_make(s--,0); |
667 | str_magic(str, envstab, 'E', *env, s - *env); | |
668 | (void)hstore(stab_hash(envstab), *env, s - *env, str, 0); | |
669 | *s = '='; | |
8d063cd8 LW |
670 | } |
671 | } | |
a687059c LW |
672 | #ifdef TAINT |
673 | tainted = 0; | |
674 | #endif | |
378cc40b | 675 | if (tmpstab = stabent("$",allstabs)) |
8d063cd8 LW |
676 | str_numset(STAB_STR(tmpstab),(double)getpid()); |
677 | ||
a687059c | 678 | if (setjmp(top_env)) /* sets goto_targ on longjump */ |
ac58e20f | 679 | loop_ptr = -1; /* start label stack again */ |
8d063cd8 LW |
680 | |
681 | #ifdef DEBUGGING | |
682 | if (debug & 1024) | |
a687059c | 683 | dump_all(); |
8d063cd8 LW |
684 | if (debug) |
685 | fprintf(stderr,"\nEXECUTING...\n\n"); | |
686 | #endif | |
687 | ||
688 | /* do it */ | |
689 | ||
a687059c | 690 | (void) cmd_exec(main_root,G_SCALAR,-1); |
8d063cd8 LW |
691 | |
692 | if (goto_targ) | |
378cc40b | 693 | fatal("Can't find label \"%s\"--aborting",goto_targ); |
8d063cd8 | 694 | exit(0); |
378cc40b | 695 | /* NOTREACHED */ |
8d063cd8 LW |
696 | } |
697 | ||
698 | magicalize(list) | |
699 | register char *list; | |
700 | { | |
701 | register STAB *stab; | |
702 | char sym[2]; | |
703 | ||
704 | sym[1] = '\0'; | |
705 | while (*sym = *list++) { | |
a559c259 | 706 | if (stab = stabent(sym,allstabs)) { |
a687059c LW |
707 | stab_flags(stab) = SF_VMAGIC; |
708 | str_magic(stab_val(stab), stab, 0, Nullch, 0); | |
378cc40b | 709 | } |
378cc40b | 710 | } |
8d063cd8 LW |
711 | } |
712 | ||
a687059c | 713 | /* this routine is in perly.c by virtue of being sort of an alternate main() */ |
8d063cd8 | 714 | |
a687059c LW |
715 | int |
716 | do_eval(str,optype,stash,gimme,arglast) | |
717 | STR *str; | |
718 | int optype; | |
719 | HASH *stash; | |
720 | int gimme; | |
721 | int *arglast; | |
8d063cd8 | 722 | { |
a687059c LW |
723 | STR **st = stack->ary_array; |
724 | int retval; | |
725 | CMD *myroot; | |
726 | ARRAY *ar; | |
727 | int i; | |
ac58e20f LW |
728 | char * VOLATILE oldfile = filename; |
729 | VOLATILE line_t oldline = line; | |
730 | VOLATILE int oldtmps_base = tmps_base; | |
731 | VOLATILE int oldsave = savestack->ary_fill; | |
732 | SPAT * VOLATILE oldspat = curspat; | |
a687059c LW |
733 | static char *last_eval = Nullch; |
734 | static CMD *last_root = Nullcmd; | |
663a0e37 | 735 | VOLATILE int sp = arglast[0]; |
ac58e20f | 736 | char *tmps; |
8d063cd8 | 737 | |
a687059c LW |
738 | tmps_base = tmps_max; |
739 | if (curstash != stash) { | |
740 | (void)savehptr(&curstash); | |
741 | curstash = stash; | |
8d063cd8 | 742 | } |
a687059c LW |
743 | str_set(stab_val(stabent("@",TRUE)),""); |
744 | if (optype != O_DOFILE) { /* normal eval */ | |
745 | filename = "(eval)"; | |
746 | line = 1; | |
747 | str_sset(linestr,str); | |
748 | str_cat(linestr,";"); /* be kind to them */ | |
8d063cd8 | 749 | } |
a687059c LW |
750 | else { |
751 | if (last_root) { | |
752 | Safefree(last_eval); | |
753 | cmd_free(last_root); | |
754 | last_root = Nullcmd; | |
8d063cd8 | 755 | } |
a687059c LW |
756 | filename = savestr(str_get(str)); /* can't free this easily */ |
757 | str_set(linestr,""); | |
758 | rsfp = fopen(filename,"r"); | |
759 | ar = stab_array(incstab); | |
760 | if (!rsfp && *filename != '/') { | |
761 | for (i = 0; i <= ar->ary_fill; i++) { | |
762 | (void)sprintf(buf,"%s/%s",str_get(afetch(ar,i,TRUE)),filename); | |
763 | rsfp = fopen(buf,"r"); | |
764 | if (rsfp) { | |
765 | filename = savestr(buf); | |
8d063cd8 LW |
766 | break; |
767 | } | |
378cc40b LW |
768 | } |
769 | } | |
a687059c LW |
770 | if (!rsfp) { |
771 | filename = oldfile; | |
772 | tmps_base = oldtmps_base; | |
773 | if (gimme != G_ARRAY) | |
774 | st[++sp] = &str_undef; | |
775 | return sp; | |
8d063cd8 | 776 | } |
a687059c | 777 | line = 0; |
8d063cd8 | 778 | } |
a687059c LW |
779 | in_eval++; |
780 | oldoldbufptr = oldbufptr = bufptr = str_get(linestr); | |
781 | bufend = bufptr + linestr->str_cur; | |
ac58e20f LW |
782 | if (++loop_ptr >= loop_max) { |
783 | loop_max += 128; | |
784 | Renew(loop_stack, loop_max, struct loop); | |
785 | } | |
786 | loop_stack[loop_ptr].loop_label = "_EVAL_"; | |
787 | loop_stack[loop_ptr].loop_sp = sp; | |
788 | #ifdef DEBUGGING | |
789 | if (debug & 4) { | |
790 | deb("(Pushing label #%d _EVAL_)\n", loop_ptr); | |
791 | } | |
792 | #endif | |
793 | if (setjmp(loop_stack[loop_ptr].loop_env)) { | |
a687059c LW |
794 | retval = 1; |
795 | last_root = Nullcmd; | |
8d063cd8 | 796 | } |
a687059c LW |
797 | else { |
798 | error_count = 0; | |
799 | if (rsfp) | |
800 | retval = yyparse(); | |
801 | else if (last_root && *bufptr == *last_eval && strEQ(bufptr,last_eval)){ | |
802 | retval = 0; | |
803 | eval_root = last_root; /* no point in reparsing */ | |
804 | } | |
805 | else if (in_eval == 1) { | |
806 | if (last_root) { | |
807 | Safefree(last_eval); | |
808 | cmd_free(last_root); | |
8d063cd8 | 809 | } |
a687059c LW |
810 | last_eval = savestr(bufptr); |
811 | last_root = Nullcmd; | |
812 | retval = yyparse(); | |
813 | if (!retval) | |
814 | last_root = eval_root; | |
8d063cd8 | 815 | } |
a687059c LW |
816 | else |
817 | retval = yyparse(); | |
8d063cd8 | 818 | } |
a687059c LW |
819 | myroot = eval_root; /* in case cmd_exec does another eval! */ |
820 | if (retval || error_count) { | |
ac58e20f LW |
821 | st = stack->ary_array; |
822 | sp = arglast[0]; | |
823 | if (gimme != G_ARRAY) | |
824 | st[++sp] = &str_undef; | |
a687059c LW |
825 | last_root = Nullcmd; /* can't free on error, for some reason */ |
826 | if (rsfp) { | |
827 | fclose(rsfp); | |
828 | rsfp = 0; | |
829 | } | |
8d063cd8 | 830 | } |
8d063cd8 | 831 | else { |
a687059c LW |
832 | sp = cmd_exec(eval_root,gimme,sp); |
833 | st = stack->ary_array; | |
834 | for (i = arglast[0] + 1; i <= sp; i++) | |
835 | st[i] = str_static(st[i]); | |
836 | /* if we don't save result, free zaps it */ | |
837 | if (in_eval != 1 && myroot != last_root) | |
838 | cmd_free(myroot); | |
a559c259 LW |
839 | } |
840 | in_eval--; | |
ac58e20f LW |
841 | #ifdef DEBUGGING |
842 | if (debug & 4) { | |
843 | tmps = loop_stack[loop_ptr].loop_label; | |
844 | deb("(Popping label #%d %s)\n",loop_ptr, | |
845 | tmps ? tmps : "" ); | |
846 | } | |
847 | #endif | |
848 | loop_ptr--; | |
378cc40b LW |
849 | filename = oldfile; |
850 | line = oldline; | |
851 | tmps_base = oldtmps_base; | |
a687059c | 852 | curspat = oldspat; |
378cc40b LW |
853 | if (savestack->ary_fill > oldsave) /* let them use local() */ |
854 | restorelist(oldsave); | |
a687059c | 855 | return sp; |
378cc40b | 856 | } |