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 |
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 |
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 |
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 |
19 | * Revision 3.0.1.2 89/11/17 15:34:42 lwall |
20 | * patch5: fixed possible confusion about current effective gid |
21 | * |
ae986130 |
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 |
25 | * Revision 3.0 89/10/18 15:22:21 lwall |
26 | * 3.0 baseline |
8d063cd8 |
27 | * |
28 | */ |
29 | |
378cc40b |
30 | #include "EXTERN.h" |
31 | #include "perl.h" |
32 | #include "perly.h" |
a687059c |
33 | #include "patchlevel.h" |
378cc40b |
34 | |
a687059c |
35 | #ifdef IAMSUID |
36 | #ifndef DOSUID |
37 | #define DOSUID |
38 | #endif |
39 | #endif |
378cc40b |
40 | |
a687059c |
41 | #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW |
42 | #ifdef DOSUID |
43 | #undef DOSUID |
44 | #endif |
45 | #endif |
8d063cd8 |
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 |
54 | char *index(), *strcpy(), *getenv(); |
55 | bool dosearch = FALSE; |
a687059c |
56 | #ifdef DOSUID |
13281fa4 |
57 | char *validarg = ""; |
58 | #endif |
8d063cd8 |
59 | |
a687059c |
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 |
68 | origargv = argv; |
69 | origargc = argc; |
378cc40b |
70 | uid = (int)getuid(); |
71 | euid = (int)geteuid(); |
a687059c |
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 |
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 |
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 |
88 | for (argc--,argv++; argc; argc--,argv++) { |
89 | if (argv[0][0] != '-' || !argv[0][1]) |
90 | break; |
13281fa4 |
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 |
100 | case 'a': |
101 | minus_a = TRUE; |
13281fa4 |
102 | s++; |
378cc40b |
103 | goto reswitch; |
a687059c |
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 |
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 |
119 | #else |
120 | warn("Recompile perl with -DDEBUGGING to use -D switch\n"); |
8d063cd8 |
121 | #endif |
122 | break; |
8d063cd8 |
123 | case 'e': |
a687059c |
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 |
129 | e_tmpname = savestr(TMPPATH); |
130 | (void)mktemp(e_tmpname); |
8d063cd8 |
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 |
136 | argc--,argv++; |
137 | break; |
138 | case 'i': |
13281fa4 |
139 | inplace = savestr(s+1); |
8d063cd8 |
140 | argvoutstab = stabent("ARGVOUT",TRUE); |
141 | break; |
142 | case 'I': |
a687059c |
143 | #ifdef TAINT |
144 | if (euid != uid || egid != gid) |
145 | fatal("No -I allowed in setuid scripts"); |
146 | #endif |
13281fa4 |
147 | str_cat(str,"-"); |
148 | str_cat(str,s); |
8d063cd8 |
149 | str_cat(str," "); |
a687059c |
150 | if (*++s) { |
151 | (void)apush(stab_array(incstab),str_make(s,0)); |
378cc40b |
152 | } |
153 | else { |
a687059c |
154 | (void)apush(stab_array(incstab),str_make(argv[1],0)); |
8d063cd8 |
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 |
163 | goto reswitch; |
164 | case 'p': |
378cc40b |
165 | minus_p = TRUE; |
13281fa4 |
166 | s++; |
8d063cd8 |
167 | goto reswitch; |
168 | case 'P': |
a687059c |
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 |
175 | goto reswitch; |
176 | case 's': |
a687059c |
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 |
184 | case 'S': |
185 | dosearch = TRUE; |
13281fa4 |
186 | s++; |
378cc40b |
187 | goto reswitch; |
a687059c |
188 | case 'u': |
189 | do_undump = TRUE; |
190 | s++; |
191 | goto reswitch; |
378cc40b |
192 | case 'U': |
193 | unsafe = TRUE; |
13281fa4 |
194 | s++; |
378cc40b |
195 | goto reswitch; |
8d063cd8 |
196 | case 'v': |
a687059c |
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 |
202 | case 'w': |
203 | dowarn = TRUE; |
13281fa4 |
204 | s++; |
378cc40b |
205 | goto reswitch; |
8d063cd8 |
206 | case '-': |
207 | argc--,argv++; |
208 | goto switch_end; |
209 | case 0: |
210 | break; |
211 | default: |
13281fa4 |
212 | fatal("Unrecognized switch: -%s",s); |
8d063cd8 |
213 | } |
214 | } |
215 | switch_end: |
216 | if (e_fp) { |
a687059c |
217 | (void)fclose(e_fp); |
8d063cd8 |
218 | argc++,argv--; |
219 | argv[0] = e_tmpname; |
220 | } |
378cc40b |
221 | #ifndef PRIVLIB |
222 | #define PRIVLIB "/usr/local/lib/perl" |
223 | #endif |
a687059c |
224 | (void)apush(stab_array(incstab),str_make(PRIVLIB,0)); |
8d063cd8 |
225 | |
226 | str_set(&str_no,No); |
227 | str_set(&str_yes,Yes); |
8d063cd8 |
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 |
240 | if (*s) |
241 | s++; |
a687059c |
242 | if (len) |
243 | (void)strcat(tokenbuf+len,"/"); |
244 | (void)strcat(tokenbuf+len,argv[0]); |
378cc40b |
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 |
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 |
263 | argv[0] = savestr(xfound); |
264 | } |
a687059c |
265 | |
266 | pidstatary = anew(Nullstab); /* for remembering popen pids, status */ |
267 | |
8d063cd8 |
268 | filename = savestr(argv[0]); |
378cc40b |
269 | origfilename = savestr(filename); |
8d063cd8 |
270 | if (strEQ(filename,"-")) |
271 | argv[0] = ""; |
272 | if (preprocess) { |
378cc40b |
273 | str_cat(str,"-I"); |
274 | str_cat(str,PRIVLIB); |
a687059c |
275 | (void)sprintf(buf, "\ |
8d063cd8 |
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 |
282 | -e '/^#[ ]*else/b' \ |
283 | -e '/^#[ ]*endif/b' \ |
284 | -e 's/^#.*//' \ |
378cc40b |
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 |
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 |
298 | #endif /* IAMSUID */ |
299 | rsfp = mypopen(buf,"r"); |
8d063cd8 |
300 | } |
301 | else if (!*argv[0]) |
302 | rsfp = stdin; |
303 | else |
304 | rsfp = fopen(argv[0],"r"); |
13281fa4 |
305 | if (rsfp == Nullfp) { |
306 | #ifdef DOSUID |
a687059c |
307 | #ifndef IAMSUID /* in case script is not readable before setuid */ |
13281fa4 |
308 | if (euid && stat(filename,&statbuf) >= 0 && |
309 | statbuf.st_mode & (S_ISUID|S_ISGID)) { |
a687059c |
310 | (void)sprintf(buf, "%s/%s", BIN, "suidperl"); |
311 | execv(buf, origargv); /* try again */ |
13281fa4 |
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 |
319 | str_free(str); /* free -I directories */ |
320 | |
13281fa4 |
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 |
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 |
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 |
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 |
363 | if (access(filename,1)) /* as a double check */ |
364 | fatal("Permission denied"); |
a687059c |
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 |
400 | if ((statbuf.st_mode & S_IFMT) != S_IFREG) |
401 | fatal("Permission denied"); |
a687059c |
402 | if ((statbuf.st_mode >> 6) & S_IWRITE) |
403 | fatal("Setuid/gid script is writable by world"); |
13281fa4 |
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 |
409 | s = tokenbuf+2; |
410 | if (*s == ' ') s++; |
411 | while (!isspace(*s)) s++; |
13281fa4 |
412 | if (strnNE(s-4,"perl",4)) /* sanity check */ |
413 | fatal("Not a perl script"); |
a687059c |
414 | while (*s == ' ' || *s == '\t') s++; |
13281fa4 |
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 |
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 |
432 | |
433 | if (euid) { /* oops, we're not the setuid root perl */ |
a687059c |
434 | (void)fclose(rsfp); |
13281fa4 |
435 | #ifndef IAMSUID |
a687059c |
436 | (void)sprintf(buf, "%s/%s", BIN, "suidperl"); |
437 | execv(buf, origargv); /* try again */ |
13281fa4 |
438 | #endif |
439 | fatal("Can't do setuid\n"); |
440 | } |
441 | |
ffed7fef |
442 | if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) |
a687059c |
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 |
476 | gid = (int)getgid(); |
477 | egid = (int)getegid(); |
a687059c |
478 | if (!cando(S_IEXEC,TRUE,&statbuf)) |
13281fa4 |
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 |
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 |
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 |
517 | #endif /* DOSUID */ |
518 | |
8d063cd8 |
519 | defstab = stabent("_",TRUE); |
520 | |
a687059c |
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 |
537 | /* init tokener */ |
538 | |
a687059c |
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 |
547 | error_count = 0; |
548 | if (yyparse() || error_count) |
8d063cd8 |
549 | fatal("Execution aborted due to compilation errors.\n"); |
550 | |
a687059c |
551 | New(50,loop_stack,128,struct loop); |
ae986130 |
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 |
559 | |
560 | preprocess = FALSE; |
8d063cd8 |
561 | if (e_fp) { |
562 | e_fp = Nullfp; |
a687059c |
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 |
631 | |
632 | if (do_undump) |
633 | abort(); |
634 | |
635 | just_doit: /* come here if running an undumped a.out */ |
8d063cd8 |
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 |
644 | } |
645 | } |
a687059c |
646 | #ifdef TAINT |
647 | tainted = 1; |
648 | #endif |
a559c259 |
649 | if (argvstab = stabent("ARGV",allstabs)) { |
a687059c |
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 |
654 | } |
655 | } |
a687059c |
656 | #ifdef TAINT |
657 | (void) stabent("ENV",TRUE); /* must test PATH and IFS */ |
658 | #endif |
a559c259 |
659 | if (envstab = stabent("ENV",allstabs)) { |
a687059c |
660 | envstab->str_pok |= SP_MULTI; |
661 | (void)hadd(envstab); |
8d063cd8 |
662 | for (; *env; env++) { |
663 | if (!(s = index(*env,'='))) |
664 | continue; |
665 | *s++ = '\0'; |
a687059c |
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 |
670 | } |
671 | } |
a687059c |
672 | #ifdef TAINT |
673 | tainted = 0; |
674 | #endif |
378cc40b |
675 | if (tmpstab = stabent("$",allstabs)) |
8d063cd8 |
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 |
680 | |
681 | #ifdef DEBUGGING |
682 | if (debug & 1024) |
a687059c |
683 | dump_all(); |
8d063cd8 |
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 |
691 | |
692 | if (goto_targ) |
378cc40b |
693 | fatal("Can't find label \"%s\"--aborting",goto_targ); |
8d063cd8 |
694 | exit(0); |
378cc40b |
695 | /* NOTREACHED */ |
8d063cd8 |
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 |
707 | stab_flags(stab) = SF_VMAGIC; |
708 | str_magic(stab_val(stab), stab, 0, Nullch, 0); |
378cc40b |
709 | } |
378cc40b |
710 | } |
8d063cd8 |
711 | } |
712 | |
a687059c |
713 | /* this routine is in perly.c by virtue of being sort of an alternate main() */ |
8d063cd8 |
714 | |
a687059c |
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 |
723 | STR **st = stack->ary_array; |
724 | int retval; |
725 | CMD *myroot; |
726 | ARRAY *ar; |
727 | int i; |
ac58e20f |
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 |
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 |
738 | tmps_base = tmps_max; |
739 | if (curstash != stash) { |
740 | (void)savehptr(&curstash); |
741 | curstash = stash; |
8d063cd8 |
742 | } |
a687059c |
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 |
750 | else { |
751 | if (last_root) { |
752 | Safefree(last_eval); |
753 | cmd_free(last_root); |
754 | last_root = Nullcmd; |
8d063cd8 |
755 | } |
a687059c |
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 |
766 | break; |
767 | } |
378cc40b |
768 | } |
769 | } |
a687059c |
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 |
779 | in_eval++; |
780 | oldoldbufptr = oldbufptr = bufptr = str_get(linestr); |
781 | bufend = bufptr + linestr->str_cur; |
ac58e20f |
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 |
794 | retval = 1; |
795 | last_root = Nullcmd; |
8d063cd8 |
796 | } |
a687059c |
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 |
810 | last_eval = savestr(bufptr); |
811 | last_root = Nullcmd; |
812 | retval = yyparse(); |
813 | if (!retval) |
814 | last_root = eval_root; |
8d063cd8 |
815 | } |
a687059c |
816 | else |
817 | retval = yyparse(); |
8d063cd8 |
818 | } |
a687059c |
819 | myroot = eval_root; /* in case cmd_exec does another eval! */ |
820 | if (retval || error_count) { |
ac58e20f |
821 | st = stack->ary_array; |
822 | sp = arglast[0]; |
823 | if (gimme != G_ARRAY) |
824 | st[++sp] = &str_undef; |
a687059c |
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 |
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 |
839 | } |
840 | in_eval--; |
ac58e20f |
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 |
849 | filename = oldfile; |
850 | line = oldline; |
851 | tmps_base = oldtmps_base; |
a687059c |
852 | curspat = oldspat; |
378cc40b |
853 | if (savestack->ary_fill > oldsave) /* let them use local() */ |
854 | restorelist(oldsave); |
a687059c |
855 | return sp; |
378cc40b |
856 | } |