Annotation of embedaddon/sudo/plugins/sudoers/visudo.c, revision 1.1.1.2
1.1 misho 1: /*
1.1.1.2 ! misho 2: * Copyright (c) 1996, 1998-2005, 2007-2012
1.1 misho 3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: *
17: * Sponsored in part by the Defense Advanced Research Projects
18: * Agency (DARPA) and Air Force Research Laboratory, Air Force
19: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
20: */
21:
22: /*
23: * Lock the sudoers file for safe editing (ala vipw) and check for parse errors.
24: */
25:
26: #define _SUDO_MAIN
27:
28: #ifdef __TANDEM
29: # include <floss.h>
30: #endif
31:
32: #include <config.h>
33:
34: #include <sys/types.h>
35: #include <sys/param.h>
36: #include <sys/stat.h>
37: #include <sys/socket.h>
38: #include <sys/time.h>
39: #ifndef __TANDEM
40: # include <sys/file.h>
41: #endif
42: #include <sys/wait.h>
43: #include <stdio.h>
44: #ifdef STDC_HEADERS
45: # include <stdlib.h>
46: # include <stddef.h>
47: #else
48: # ifdef HAVE_STDLIB_H
49: # include <stdlib.h>
50: # endif
51: #endif /* STDC_HEADERS */
52: #ifdef HAVE_STRING_H
53: # include <string.h>
54: #endif /* HAVE_STRING_H */
55: #ifdef HAVE_STRINGS_H
56: # include <strings.h>
57: #endif /* HAVE_STRINGS_H */
58: #ifdef HAVE_UNISTD_H
59: #include <unistd.h>
60: #endif /* HAVE_UNISTD_H */
61: #include <stdarg.h>
62: #include <ctype.h>
63: #include <pwd.h>
64: #include <grp.h>
65: #include <signal.h>
66: #include <errno.h>
67: #include <fcntl.h>
68: #include <netinet/in.h>
69: #include <arpa/inet.h>
70: #include <netdb.h>
71: #if TIME_WITH_SYS_TIME
72: # include <time.h>
73: #endif
74: #ifdef HAVE_SETLOCALE
75: # include <locale.h>
76: #endif
77:
78: #include "sudoers.h"
79: #include "interfaces.h"
80: #include "parse.h"
81: #include "redblack.h"
82: #include "gettext.h"
83: #include "sudoers_version.h"
1.1.1.2 ! misho 84: #include "sudo_conf.h"
1.1 misho 85: #include <gram.h>
86:
87: struct sudoersfile {
88: struct sudoersfile *prev, *next;
89: char *path;
90: char *tpath;
91: int fd;
92: int modified;
93: int doedit;
94: };
95: TQ_DECLARE(sudoersfile)
96:
1.1.1.2 ! misho 97: sudo_conv_t sudo_conv; /* NULL in non-plugin */
! 98:
1.1 misho 99: /*
100: * Function prototypes
101: */
102: static void quit(int);
103: static char *get_args(char *);
104: static char *get_editor(char **);
105: static void get_hostname(void);
1.1.1.2 ! misho 106: static int whatnow(void);
! 107: static int check_aliases(bool, bool);
! 108: static bool check_syntax(char *, bool, bool, bool);
! 109: static bool edit_sudoers(struct sudoersfile *, char *, char *, int);
! 110: static bool install_sudoers(struct sudoersfile *, bool);
1.1 misho 111: static int print_unused(void *, void *);
1.1.1.2 ! misho 112: static void reparse_sudoers(char *, char *, bool, bool);
1.1 misho 113: static int run_command(char *, char **);
114: static int visudo_printf(int msg_type, const char *fmt, ...);
115: static void setup_signals(void);
116: static void help(void) __attribute__((__noreturn__));
117: static void usage(int);
118:
119: void cleanup(int);
120:
121: extern void yyerror(const char *);
122: extern void yyrestart(FILE *);
123:
124: /*
125: * External globals exported by the parser
126: */
127: extern struct rbtree *aliases;
128: extern FILE *yyin;
129: extern char *sudoers, *errorfile;
1.1.1.2 ! misho 130: extern int errorlineno;
! 131: extern bool parse_error;
1.1 misho 132: /* For getopt(3) */
133: extern char *optarg;
134: extern int optind;
135:
136: /*
137: * Globals
138: */
139: struct interface *interfaces;
140: struct sudo_user sudo_user;
141: struct passwd *list_pw;
142: sudo_printf_t sudo_printf = visudo_printf;
143: static struct sudoersfile_list sudoerslist;
144: static struct rbtree *alias_freelist;
1.1.1.2 ! misho 145: static bool checkonly;
1.1 misho 146:
147: int
148: main(int argc, char *argv[])
149: {
150: struct sudoersfile *sp;
151: char *args, *editor, *sudoers_path;
1.1.1.2 ! misho 152: int ch, exitcode = 0;
! 153: bool quiet, strict, oldperms;
! 154: debug_decl(main, SUDO_DEBUG_MAIN)
! 155:
1.1 misho 156: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
1.1.1.2 ! misho 157: {
! 158: extern char *malloc_options;
! 159: malloc_options = "AFGJPR";
! 160: }
1.1 misho 161: #endif
162:
163: #if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
164: setprogname(argc > 0 ? argv[0] : "visudo");
165: #endif
166:
167: #ifdef HAVE_SETLOCALE
168: setlocale(LC_ALL, "");
169: #endif
170: bindtextdomain("sudoers", LOCALEDIR); /* XXX - should have visudo domain */
171: textdomain("sudoers");
172:
173: if (argc < 1)
174: usage(1);
175:
1.1.1.2 ! misho 176: /* Read sudo.conf. */
! 177: sudo_conf_read();
! 178:
1.1 misho 179: /*
180: * Arg handling.
181: */
1.1.1.2 ! misho 182: checkonly = oldperms = quiet = strict = false;
1.1 misho 183: sudoers_path = _PATH_SUDOERS;
184: while ((ch = getopt(argc, argv, "Vcf:sq")) != -1) {
185: switch (ch) {
186: case 'V':
187: (void) printf(_("%s version %s\n"), getprogname(), PACKAGE_VERSION);
188: (void) printf(_("%s grammar version %d\n"), getprogname(), SUDOERS_GRAMMAR_VERSION);
1.1.1.2 ! misho 189: goto done;
1.1 misho 190: case 'c':
191: checkonly++; /* check mode */
192: break;
193: case 'f':
194: sudoers_path = optarg; /* sudoers file path */
1.1.1.2 ! misho 195: oldperms = true;
1.1 misho 196: break;
197: case 'h':
198: help();
199: break;
200: case 's':
201: strict++; /* strict mode */
202: break;
203: case 'q':
204: quiet++; /* quiet mode */
205: break;
206: default:
207: usage(1);
208: }
209: }
1.1.1.2 ! misho 210: /* There should be no other command line arguments. */
! 211: if (argc - optind != 0)
1.1 misho 212: usage(1);
213:
214: sudo_setpwent();
215: sudo_setgrent();
216:
217: /* Mock up a fake sudo_user struct. */
218: user_cmnd = "";
219: if ((sudo_user.pw = sudo_getpwuid(getuid())) == NULL)
220: errorx(1, _("you do not exist in the %s database"), "passwd");
221: get_hostname();
222:
223: /* Setup defaults data structures. */
224: init_defaults();
225:
1.1.1.2 ! misho 226: if (checkonly) {
! 227: exitcode = check_syntax(sudoers_path, quiet, strict, oldperms) ? 0 : 1;
! 228: goto done;
! 229: }
1.1 misho 230:
231: /*
232: * Parse the existing sudoers file(s) in quiet mode to highlight any
233: * existing errors and to pull in editor and env_editor conf values.
234: */
1.1.1.2 ! misho 235: if ((yyin = open_sudoers(sudoers_path, true, NULL)) == NULL) {
1.1 misho 236: error(1, "%s", sudoers_path);
237: }
238: init_parser(sudoers_path, 0);
239: yyparse();
240: (void) update_defaults(SETDEF_GENERIC|SETDEF_HOST|SETDEF_USER);
241:
242: editor = get_editor(&args);
243:
244: /* Install signal handlers to clean up temp files if we are killed. */
245: setup_signals();
246:
247: /* Edit the sudoers file(s) */
248: tq_foreach_fwd(&sudoerslist, sp) {
249: if (!sp->doedit)
250: continue;
251: if (sp != tq_first(&sudoerslist)) {
252: printf(_("press return to edit %s: "), sp->path);
253: while ((ch = getchar()) != EOF && ch != '\n')
254: continue;
255: }
256: edit_sudoers(sp, editor, args, -1);
257: }
258:
259: /* Check edited files for a parse error and re-edit any that fail. */
260: reparse_sudoers(editor, args, strict, quiet);
261:
1.1.1.2 ! misho 262: /* Install the sudoers temp files as needed. */
1.1 misho 263: tq_foreach_fwd(&sudoerslist, sp) {
1.1.1.2 ! misho 264: (void) install_sudoers(sp, oldperms);
1.1 misho 265: }
266:
1.1.1.2 ! misho 267: done:
! 268: sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
! 269: exit(exitcode);
1.1 misho 270: }
271:
272: /*
273: * List of editors that support the "+lineno" command line syntax.
274: * If an entry starts with '*' the tail end of the string is matched.
275: * No other wild cards are supported.
276: */
277: static char *lineno_editors[] = {
278: "ex",
279: "nex",
280: "vi",
281: "nvi",
282: "vim",
283: "elvis",
284: "*macs",
285: "mg",
286: "vile",
287: "jove",
288: "pico",
289: "nano",
290: "ee",
291: "joe",
292: "zile",
293: NULL
294: };
295:
296: /*
297: * Edit each sudoers file.
1.1.1.2 ! misho 298: * Returns true on success, else false.
1.1 misho 299: */
1.1.1.2 ! misho 300: static bool
1.1 misho 301: edit_sudoers(struct sudoersfile *sp, char *editor, char *args, int lineno)
302: {
303: int tfd; /* sudoers temp file descriptor */
1.1.1.2 ! misho 304: bool modified; /* was the file modified? */
1.1 misho 305: int ac; /* argument count */
306: char **av; /* argument vector for run_command */
307: char *cp; /* scratch char pointer */
308: char buf[PATH_MAX*2]; /* buffer used for copying files */
309: char linestr[64]; /* string version of lineno */
310: struct timeval tv, tv1, tv2; /* time before and after edit */
311: struct timeval orig_mtim; /* starting mtime of sudoers file */
312: off_t orig_size; /* starting size of sudoers file */
313: ssize_t nread; /* number of bytes read */
314: struct stat sb; /* stat buffer */
1.1.1.2 ! misho 315: bool rval = false; /* return value */
! 316: debug_decl(edit_sudoers, SUDO_DEBUG_UTIL)
1.1 misho 317:
318: if (fstat(sp->fd, &sb) == -1)
319: error(1, _("unable to stat %s"), sp->path);
320: orig_size = sb.st_size;
321: mtim_get(&sb, &orig_mtim);
322:
323: /* Create the temp file if needed and set timestamp. */
324: if (sp->tpath == NULL) {
325: easprintf(&sp->tpath, "%s.tmp", sp->path);
326: tfd = open(sp->tpath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
327: if (tfd < 0)
328: error(1, "%s", sp->tpath);
329:
330: /* Copy sp->path -> sp->tpath and reset the mtime. */
331: if (orig_size != 0) {
332: (void) lseek(sp->fd, (off_t)0, SEEK_SET);
333: while ((nread = read(sp->fd, buf, sizeof(buf))) > 0)
334: if (write(tfd, buf, nread) != nread)
335: error(1, _("write error"));
336:
337: /* Add missing newline at EOF if needed. */
338: if (nread > 0 && buf[nread - 1] != '\n') {
339: buf[0] = '\n';
340: if (write(tfd, buf, 1) != 1)
341: error(1, _("write error"));
342: }
343: }
344: (void) close(tfd);
345: }
346: (void) touch(-1, sp->tpath, &orig_mtim);
347:
348: /* Does the editor support +lineno? */
349: if (lineno > 0)
350: {
351: char *editor_base = strrchr(editor, '/');
352: if (editor_base != NULL)
353: editor_base++;
354: else
355: editor_base = editor;
356: if (*editor_base == 'r')
357: editor_base++;
358:
359: for (av = lineno_editors; (cp = *av) != NULL; av++) {
360: /* We only handle a leading '*' wildcard. */
361: if (*cp == '*') {
362: size_t blen = strlen(editor_base);
363: size_t clen = strlen(++cp);
364: if (blen >= clen) {
365: if (strcmp(cp, editor_base + blen - clen) == 0)
366: break;
367: }
368: } else if (strcmp(cp, editor_base) == 0)
369: break;
370: }
371: /* Disable +lineno if editor doesn't support it. */
372: if (cp == NULL)
373: lineno = -1;
374: }
375:
376: /* Find the length of the argument vector */
377: ac = 3 + (lineno > 0);
378: if (args) {
1.1.1.2 ! misho 379: bool wasblank;
1.1 misho 380:
381: ac++;
1.1.1.2 ! misho 382: for (wasblank = false, cp = args; *cp; cp++) {
1.1 misho 383: if (isblank((unsigned char) *cp))
1.1.1.2 ! misho 384: wasblank = true;
1.1 misho 385: else if (wasblank) {
1.1.1.2 ! misho 386: wasblank = false;
1.1 misho 387: ac++;
388: }
389: }
390: }
391:
392: /* Build up argument vector for the command */
393: av = emalloc2(ac, sizeof(char *));
394: if ((av[0] = strrchr(editor, '/')) != NULL)
395: av[0]++;
396: else
397: av[0] = editor;
398: ac = 1;
399: if (lineno > 0) {
400: (void) snprintf(linestr, sizeof(linestr), "+%d", lineno);
401: av[ac++] = linestr;
402: }
403: if (args) {
404: for ((cp = strtok(args, " \t")); cp; (cp = strtok(NULL, " \t")))
405: av[ac++] = cp;
406: }
407: av[ac++] = sp->tpath;
408: av[ac++] = NULL;
409:
410: /*
411: * Do the edit:
412: * We cannot check the editor's exit value against 0 since
413: * XPG4 specifies that vi's exit value is a function of the
414: * number of errors during editing (?!?!).
415: */
416: gettimeofday(&tv1, NULL);
417: if (run_command(editor, av) != -1) {
418: gettimeofday(&tv2, NULL);
419: /*
420: * Sanity checks.
421: */
422: if (stat(sp->tpath, &sb) < 0) {
423: warningx(_("unable to stat temporary file (%s), %s unchanged"),
424: sp->tpath, sp->path);
1.1.1.2 ! misho 425: goto done;
1.1 misho 426: }
427: if (sb.st_size == 0 && orig_size != 0) {
428: warningx(_("zero length temporary file (%s), %s unchanged"),
429: sp->tpath, sp->path);
1.1.1.2 ! misho 430: sp->modified = true;
! 431: goto done;
1.1 misho 432: }
433: } else {
434: warningx(_("editor (%s) failed, %s unchanged"), editor, sp->path);
1.1.1.2 ! misho 435: goto done;
1.1 misho 436: }
437:
438: /* Set modified bit if use changed the file. */
1.1.1.2 ! misho 439: modified = true;
1.1 misho 440: mtim_get(&sb, &tv);
441: if (orig_size == sb.st_size && timevalcmp(&orig_mtim, &tv, ==)) {
442: /*
443: * If mtime and size match but the user spent no measurable
444: * time in the editor we can't tell if the file was changed.
445: */
446: timevalsub(&tv1, &tv2);
447: if (timevalisset(&tv2))
1.1.1.2 ! misho 448: modified = false;
1.1 misho 449: }
450:
451: /*
452: * If modified in this edit session, mark as modified.
453: */
454: if (modified)
455: sp->modified = modified;
456: else
457: warningx(_("%s unchanged"), sp->tpath);
458:
1.1.1.2 ! misho 459: rval = true;
! 460: done:
! 461: debug_return_bool(rval);
1.1 misho 462: }
463:
464: /*
465: * Parse sudoers after editing and re-edit any ones that caused a parse error.
466: */
1.1.1.2 ! misho 467: static void
! 468: reparse_sudoers(char *editor, char *args, bool strict, bool quiet)
1.1 misho 469: {
470: struct sudoersfile *sp, *last;
471: FILE *fp;
472: int ch;
1.1.1.2 ! misho 473: debug_decl(reparse_sudoers, SUDO_DEBUG_UTIL)
1.1 misho 474:
475: /*
476: * Parse the edited sudoers files and do sanity checking
477: */
478: do {
479: sp = tq_first(&sudoerslist);
480: last = tq_last(&sudoerslist);
481: fp = fopen(sp->tpath, "r+");
482: if (fp == NULL)
483: errorx(1, _("unable to re-open temporary file (%s), %s unchanged."),
484: sp->tpath, sp->path);
485:
486: /* Clean slate for each parse */
487: init_defaults();
488: init_parser(sp->path, quiet);
489:
490: /* Parse the sudoers temp file */
491: yyrestart(fp);
492: if (yyparse() && !parse_error) {
493: warningx(_("unabled to parse temporary file (%s), unknown error"),
494: sp->tpath);
1.1.1.2 ! misho 495: parse_error = true;
1.1 misho 496: errorfile = sp->path;
497: }
498: fclose(yyin);
499: if (!parse_error) {
500: if (!update_defaults(SETDEF_GENERIC|SETDEF_HOST|SETDEF_USER) ||
501: check_aliases(strict, quiet) != 0) {
1.1.1.2 ! misho 502: parse_error = true;
1.1 misho 503: errorfile = sp->path;
504: }
505: }
506:
507: /*
508: * Got an error, prompt the user for what to do now
509: */
510: if (parse_error) {
511: switch (whatnow()) {
1.1.1.2 ! misho 512: case 'Q' : parse_error = false; /* ignore parse error */
1.1 misho 513: break;
1.1.1.2 ! misho 514: case 'x' : /* XXX - should return instead of exiting */
! 515: cleanup(0);
! 516: sudo_debug_exit_int(__func__, __FILE__,
! 517: __LINE__, sudo_debug_subsys, 0);
1.1 misho 518: exit(0);
519: break;
520: }
521: }
522: if (parse_error) {
523: /* Edit file with the parse error */
524: tq_foreach_fwd(&sudoerslist, sp) {
525: if (errorfile == NULL || strcmp(sp->path, errorfile) == 0) {
526: edit_sudoers(sp, editor, args, errorlineno);
527: break;
528: }
529: }
530: if (sp == NULL) {
531: errorx(1, _("internal error, unable to find %s in list!"),
532: sudoers);
533: }
534: }
535:
536: /* If any new #include directives were added, edit them too. */
537: for (sp = last->next; sp != NULL; sp = sp->next) {
538: printf(_("press return to edit %s: "), sp->path);
539: while ((ch = getchar()) != EOF && ch != '\n')
540: continue;
541: edit_sudoers(sp, editor, args, errorlineno);
542: }
543: } while (parse_error);
544:
1.1.1.2 ! misho 545: debug_return;
1.1 misho 546: }
547:
548: /*
549: * Set the owner and mode on a sudoers temp file and
1.1.1.2 ! misho 550: * move it into place. Returns true on success, else false.
1.1 misho 551: */
1.1.1.2 ! misho 552: static bool
! 553: install_sudoers(struct sudoersfile *sp, bool oldperms)
1.1 misho 554: {
555: struct stat sb;
1.1.1.2 ! misho 556: bool rval = false;
! 557: debug_decl(install_sudoers, SUDO_DEBUG_UTIL)
! 558:
! 559: if (!sp->modified) {
! 560: /*
! 561: * No changes but fix owner/mode if needed.
! 562: */
! 563: (void) unlink(sp->tpath);
! 564: if (!oldperms && fstat(sp->fd, &sb) != -1) {
! 565: if (sb.st_uid != SUDOERS_UID || sb.st_gid != SUDOERS_GID)
! 566: ignore_result(chown(sp->path, SUDOERS_UID, SUDOERS_GID));
! 567: if ((sb.st_mode & 0777) != SUDOERS_MODE)
! 568: ignore_result(chmod(sp->path, SUDOERS_MODE));
! 569: }
! 570: rval = true;
! 571: goto done;
! 572: }
1.1 misho 573:
574: /*
575: * Change mode and ownership of temp file so when
576: * we move it to sp->path things are kosher.
577: */
578: if (oldperms) {
579: /* Use perms of the existing file. */
580: if (fstat(sp->fd, &sb) == -1)
581: error(1, _("unable to stat %s"), sp->path);
582: if (chown(sp->tpath, sb.st_uid, sb.st_gid) != 0) {
583: warning(_("unable to set (uid, gid) of %s to (%u, %u)"),
584: sp->tpath, (unsigned int)sb.st_uid, (unsigned int)sb.st_gid);
585: }
586: if (chmod(sp->tpath, sb.st_mode & 0777) != 0) {
587: warning(_("unable to change mode of %s to 0%o"), sp->tpath,
588: (unsigned int)(sb.st_mode & 0777));
589: }
590: } else {
591: if (chown(sp->tpath, SUDOERS_UID, SUDOERS_GID) != 0) {
592: warning(_("unable to set (uid, gid) of %s to (%u, %u)"),
593: sp->tpath, SUDOERS_UID, SUDOERS_GID);
1.1.1.2 ! misho 594: goto done;
1.1 misho 595: }
596: if (chmod(sp->tpath, SUDOERS_MODE) != 0) {
597: warning(_("unable to change mode of %s to 0%o"), sp->tpath,
598: SUDOERS_MODE);
1.1.1.2 ! misho 599: goto done;
1.1 misho 600: }
601: }
602:
603: /*
604: * Now that sp->tpath is sane (parses ok) it needs to be
605: * rename(2)'d to sp->path. If the rename(2) fails we try using
606: * mv(1) in case sp->tpath and sp->path are on different file systems.
607: */
608: if (rename(sp->tpath, sp->path) == 0) {
609: efree(sp->tpath);
610: sp->tpath = NULL;
611: } else {
612: if (errno == EXDEV) {
613: char *av[4];
614: warningx(_("%s and %s not on the same file system, using mv to rename"),
615: sp->tpath, sp->path);
616:
617: /* Build up argument vector for the command */
618: if ((av[0] = strrchr(_PATH_MV, '/')) != NULL)
619: av[0]++;
620: else
621: av[0] = _PATH_MV;
622: av[1] = sp->tpath;
623: av[2] = sp->path;
624: av[3] = NULL;
625:
626: /* And run it... */
627: if (run_command(_PATH_MV, av)) {
628: warningx(_("command failed: '%s %s %s', %s unchanged"),
629: _PATH_MV, sp->tpath, sp->path, sp->path);
630: (void) unlink(sp->tpath);
631: efree(sp->tpath);
632: sp->tpath = NULL;
1.1.1.2 ! misho 633: goto done;
1.1 misho 634: }
635: efree(sp->tpath);
636: sp->tpath = NULL;
637: } else {
638: warning(_("error renaming %s, %s unchanged"), sp->tpath, sp->path);
639: (void) unlink(sp->tpath);
1.1.1.2 ! misho 640: goto done;
1.1 misho 641: }
642: }
1.1.1.2 ! misho 643: rval = true;
! 644: done:
! 645: debug_return_bool(rval);
1.1 misho 646: }
647:
648: /* STUB */
649: void
650: set_fqdn(void)
651: {
652: return;
653: }
654:
655: /* STUB */
656: void
657: init_envtables(void)
658: {
659: return;
660: }
661:
662: /* STUB */
1.1.1.2 ! misho 663: bool
1.1 misho 664: user_is_exempt(void)
665: {
1.1.1.2 ! misho 666: return false;
1.1 misho 667: }
668:
669: /* STUB */
670: void
671: sudo_setspent(void)
672: {
673: return;
674: }
675:
676: /* STUB */
677: void
678: sudo_endspent(void)
679: {
680: return;
681: }
682:
683: /* STUB */
684: int
685: group_plugin_query(const char *user, const char *group, const struct passwd *pw)
686: {
1.1.1.2 ! misho 687: return false;
1.1 misho 688: }
689:
690: /*
691: * Assuming a parse error occurred, prompt the user for what they want
692: * to do now. Returns the first letter of their choice.
693: */
1.1.1.2 ! misho 694: static int
1.1 misho 695: whatnow(void)
696: {
697: int choice, c;
1.1.1.2 ! misho 698: debug_decl(whatnow, SUDO_DEBUG_UTIL)
1.1 misho 699:
700: for (;;) {
701: (void) fputs(_("What now? "), stdout);
702: choice = getchar();
703: for (c = choice; c != '\n' && c != EOF;)
704: c = getchar();
705:
706: switch (choice) {
707: case EOF:
708: choice = 'x';
709: /* FALLTHROUGH */
710: case 'e':
711: case 'x':
712: case 'Q':
1.1.1.2 ! misho 713: debug_return_int(choice);
1.1 misho 714: default:
715: (void) puts(_("Options are:\n"
716: " (e)dit sudoers file again\n"
717: " e(x)it without saving changes to sudoers file\n"
718: " (Q)uit and save changes to sudoers file (DANGER!)\n"));
719: }
720: }
721: }
722:
723: /*
724: * Install signal handlers for visudo.
725: */
726: static void
727: setup_signals(void)
728: {
1.1.1.2 ! misho 729: sigaction_t sa;
! 730: debug_decl(setup_signals, SUDO_DEBUG_UTIL)
1.1 misho 731:
1.1.1.2 ! misho 732: /*
! 733: * Setup signal handlers to cleanup nicely.
! 734: */
! 735: zero_bytes(&sa, sizeof(sa));
! 736: sigemptyset(&sa.sa_mask);
! 737: sa.sa_flags = SA_RESTART;
! 738: sa.sa_handler = quit;
! 739: (void) sigaction(SIGTERM, &sa, NULL);
! 740: (void) sigaction(SIGHUP, &sa, NULL);
! 741: (void) sigaction(SIGINT, &sa, NULL);
! 742: (void) sigaction(SIGQUIT, &sa, NULL);
! 743:
! 744: debug_return;
1.1 misho 745: }
746:
747: static int
748: run_command(char *path, char **argv)
749: {
750: int status;
751: pid_t pid, rv;
1.1.1.2 ! misho 752: debug_decl(run_command, SUDO_DEBUG_UTIL)
1.1 misho 753:
1.1.1.2 ! misho 754: switch (pid = sudo_debug_fork()) {
1.1 misho 755: case -1:
756: error(1, _("unable to execute %s"), path);
757: break; /* NOTREACHED */
758: case 0:
759: sudo_endpwent();
760: sudo_endgrent();
761: closefrom(STDERR_FILENO + 1);
762: execv(path, argv);
763: warning(_("unable to run %s"), path);
764: _exit(127);
765: break; /* NOTREACHED */
766: }
767:
768: do {
769: rv = waitpid(pid, &status, 0);
770: } while (rv == -1 && errno == EINTR);
771:
1.1.1.2 ! misho 772: if (rv != -1)
! 773: rv = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
! 774: debug_return_int(rv);
1.1 misho 775: }
776:
1.1.1.2 ! misho 777: static bool
! 778: check_owner(const char *path, bool quiet)
1.1 misho 779: {
780: struct stat sb;
1.1.1.2 ! misho 781: bool ok = true;
! 782: debug_decl(check_owner, SUDO_DEBUG_UTIL)
! 783:
! 784: if (stat(path, &sb) == 0) {
! 785: if (sb.st_uid != SUDOERS_UID || sb.st_gid != SUDOERS_GID) {
! 786: ok = false;
! 787: if (!quiet) {
! 788: fprintf(stderr,
! 789: _("%s: wrong owner (uid, gid) should be (%u, %u)\n"),
! 790: path, SUDOERS_UID, SUDOERS_GID);
! 791: }
! 792: }
! 793: if ((sb.st_mode & 07777) != SUDOERS_MODE) {
! 794: ok = false;
! 795: if (!quiet) {
! 796: fprintf(stderr, _("%s: bad permissions, should be mode 0%o\n"),
! 797: path, SUDOERS_MODE);
! 798: }
! 799: }
! 800: }
! 801: debug_return_bool(ok);
! 802: }
! 803:
! 804: static bool
! 805: check_syntax(char *sudoers_path, bool quiet, bool strict, bool oldperms)
! 806: {
! 807: bool ok = false;
! 808: debug_decl(check_syntax, SUDO_DEBUG_UTIL)
1.1 misho 809:
810: if (strcmp(sudoers_path, "-") == 0) {
811: yyin = stdin;
812: sudoers_path = "stdin";
813: } else if ((yyin = fopen(sudoers_path, "r")) == NULL) {
814: if (!quiet)
815: warning(_("unable to open %s"), sudoers_path);
1.1.1.2 ! misho 816: goto done;
1.1 misho 817: }
818: init_parser(sudoers_path, quiet);
819: if (yyparse() && !parse_error) {
820: if (!quiet)
821: warningx(_("failed to parse %s file, unknown error"), sudoers_path);
1.1.1.2 ! misho 822: parse_error = true;
1.1 misho 823: errorfile = sudoers_path;
824: }
825: if (!parse_error && check_aliases(strict, quiet) != 0) {
1.1.1.2 ! misho 826: parse_error = true;
1.1 misho 827: errorfile = sudoers_path;
828: }
1.1.1.2 ! misho 829: ok = !parse_error;
! 830:
! 831: if (parse_error) {
! 832: if (!quiet) {
1.1 misho 833: if (errorlineno != -1)
834: (void) printf(_("parse error in %s near line %d\n"),
835: errorfile, errorlineno);
836: else
837: (void) printf(_("parse error in %s\n"), errorfile);
838: }
1.1.1.2 ! misho 839: } else {
! 840: struct sudoersfile *sp;
! 841:
! 842: /* Parsed OK, check mode and owner. */
! 843: if (oldperms || check_owner(sudoers_path, quiet))
! 844: (void) printf(_("%s: parsed OK\n"), sudoers_path);
! 845: else
! 846: ok = false;
! 847: tq_foreach_fwd(&sudoerslist, sp) {
! 848: if (oldperms || check_owner(sp->path, quiet))
! 849: (void) printf(_("%s: parsed OK\n"), sp->path);
! 850: else
! 851: ok = false;
1.1 misho 852: }
853: }
854:
1.1.1.2 ! misho 855: done:
! 856: debug_return_bool(ok);
1.1 misho 857: }
858:
859: /*
860: * Used to open (and lock) the initial sudoers file and to also open
861: * any subsequent files #included via a callback from the parser.
862: */
863: FILE *
1.1.1.2 ! misho 864: open_sudoers(const char *path, bool doedit, bool *keepopen)
1.1 misho 865: {
866: struct sudoersfile *entry;
867: FILE *fp;
1.1.1.2 ! misho 868: int open_flags;
! 869: debug_decl(open_sudoers, SUDO_DEBUG_UTIL)
! 870:
! 871: if (checkonly)
! 872: open_flags = O_RDONLY;
! 873: else
! 874: open_flags = O_RDWR | O_CREAT;
1.1 misho 875:
876: /* Check for existing entry */
877: tq_foreach_fwd(&sudoerslist, entry) {
878: if (strcmp(path, entry->path) == 0)
879: break;
880: }
881: if (entry == NULL) {
1.1.1.2 ! misho 882: entry = ecalloc(1, sizeof(*entry));
1.1 misho 883: entry->path = estrdup(path);
1.1.1.2 ! misho 884: /* entry->modified = 0; */
1.1 misho 885: entry->prev = entry;
1.1.1.2 ! misho 886: /* entry->next = NULL; */
! 887: entry->fd = open(entry->path, open_flags, SUDOERS_MODE);
! 888: /* entry->tpath = NULL; */
1.1 misho 889: entry->doedit = doedit;
890: if (entry->fd == -1) {
891: warning("%s", entry->path);
892: efree(entry);
1.1.1.2 ! misho 893: debug_return_ptr(NULL);
1.1 misho 894: }
1.1.1.2 ! misho 895: if (!checkonly && !lock_file(entry->fd, SUDO_TLOCK))
1.1 misho 896: errorx(1, _("%s busy, try again later"), entry->path);
897: if ((fp = fdopen(entry->fd, "r")) == NULL)
898: error(1, "%s", entry->path);
899: tq_append(&sudoerslist, entry);
900: } else {
901: /* Already exists, open .tmp version if there is one. */
902: if (entry->tpath != NULL) {
903: if ((fp = fopen(entry->tpath, "r")) == NULL)
904: error(1, "%s", entry->tpath);
905: } else {
906: if ((fp = fdopen(entry->fd, "r")) == NULL)
907: error(1, "%s", entry->path);
908: rewind(fp);
909: }
910: }
911: if (keepopen != NULL)
1.1.1.2 ! misho 912: *keepopen = true;
! 913: debug_return_ptr(fp);
1.1 misho 914: }
915:
916: static char *
917: get_editor(char **args)
918: {
919: char *Editor, *EditorArgs, *EditorPath, *UserEditor, *UserEditorArgs;
1.1.1.2 ! misho 920: debug_decl(get_editor, SUDO_DEBUG_UTIL)
1.1 misho 921:
922: /*
923: * Check VISUAL and EDITOR environment variables to see which editor
924: * the user wants to use (we may not end up using it though).
925: * If the path is not fully-qualified, make it so and check that
926: * the specified executable actually exists.
927: */
928: UserEditorArgs = NULL;
929: if ((UserEditor = getenv("VISUAL")) == NULL || *UserEditor == '\0')
930: UserEditor = getenv("EDITOR");
931: if (UserEditor && *UserEditor == '\0')
932: UserEditor = NULL;
933: else if (UserEditor) {
934: UserEditorArgs = get_args(UserEditor);
935: if (find_path(UserEditor, &Editor, NULL, getenv("PATH"), 0) == FOUND) {
936: UserEditor = Editor;
937: } else {
938: if (def_env_editor) {
939: /* If we are honoring $EDITOR this is a fatal error. */
940: errorx(1, _("specified editor (%s) doesn't exist"), UserEditor);
941: } else {
942: /* Otherwise, just ignore $EDITOR. */
943: UserEditor = NULL;
944: }
945: }
946: }
947:
948: /*
949: * See if we can use the user's choice of editors either because
950: * we allow any $EDITOR or because $EDITOR is in the allowable list.
951: */
952: Editor = EditorArgs = EditorPath = NULL;
953: if (def_env_editor && UserEditor) {
954: Editor = UserEditor;
955: EditorArgs = UserEditorArgs;
956: } else if (UserEditor) {
957: struct stat editor_sb;
958: struct stat user_editor_sb;
959: char *base, *userbase;
960:
961: if (stat(UserEditor, &user_editor_sb) != 0) {
962: /* Should never happen since we already checked above. */
963: error(1, _("unable to stat editor (%s)"), UserEditor);
964: }
965: EditorPath = estrdup(def_editor);
966: Editor = strtok(EditorPath, ":");
967: do {
968: EditorArgs = get_args(Editor);
969: /*
970: * Both Editor and UserEditor should be fully qualified but
971: * check anyway...
972: */
973: if ((base = strrchr(Editor, '/')) == NULL)
974: continue;
975: if ((userbase = strrchr(UserEditor, '/')) == NULL) {
976: Editor = NULL;
977: break;
978: }
979: base++, userbase++;
980:
981: /*
982: * We compare the basenames first and then use stat to match
983: * for sure.
984: */
985: if (strcmp(base, userbase) == 0) {
986: if (stat(Editor, &editor_sb) == 0 && S_ISREG(editor_sb.st_mode)
987: && (editor_sb.st_mode & 0000111) &&
988: editor_sb.st_dev == user_editor_sb.st_dev &&
989: editor_sb.st_ino == user_editor_sb.st_ino)
990: break;
991: }
992: } while ((Editor = strtok(NULL, ":")));
993: }
994:
995: /*
996: * Can't use $EDITOR, try each element of def_editor until we
997: * find one that exists, is regular, and is executable.
998: */
999: if (Editor == NULL || *Editor == '\0') {
1000: efree(EditorPath);
1001: EditorPath = estrdup(def_editor);
1002: Editor = strtok(EditorPath, ":");
1003: do {
1004: EditorArgs = get_args(Editor);
1005: if (sudo_goodpath(Editor, NULL))
1006: break;
1007: } while ((Editor = strtok(NULL, ":")));
1008:
1009: /* Bleah, none of the editors existed! */
1010: if (Editor == NULL || *Editor == '\0')
1011: errorx(1, _("no editor found (editor path = %s)"), def_editor);
1012: }
1013: *args = EditorArgs;
1.1.1.2 ! misho 1014: debug_return_str(Editor);
1.1 misho 1015: }
1016:
1017: /*
1018: * Split out any command line arguments and return them.
1019: */
1020: static char *
1021: get_args(char *cmnd)
1022: {
1023: char *args;
1.1.1.2 ! misho 1024: debug_decl(get_args, SUDO_DEBUG_UTIL)
1.1 misho 1025:
1026: args = cmnd;
1027: while (*args && !isblank((unsigned char) *args))
1028: args++;
1029: if (*args) {
1030: *args++ = '\0';
1031: while (*args && isblank((unsigned char) *args))
1032: args++;
1033: }
1.1.1.2 ! misho 1034: debug_return_str(*args ? args : NULL);
1.1 misho 1035: }
1036:
1037: /*
1038: * Look up the hostname and set user_host and user_shost.
1039: */
1040: static void
1041: get_hostname(void)
1042: {
1043: char *p, thost[MAXHOSTNAMELEN + 1];
1.1.1.2 ! misho 1044: debug_decl(get_hostname, SUDO_DEBUG_UTIL)
1.1 misho 1045:
1.1.1.2 ! misho 1046: if (gethostname(thost, sizeof(thost)) != -1) {
! 1047: thost[sizeof(thost) - 1] = '\0';
! 1048: user_host = estrdup(thost);
! 1049:
! 1050: if ((p = strchr(user_host, '.'))) {
! 1051: *p = '\0';
! 1052: user_shost = estrdup(user_host);
! 1053: *p = '.';
! 1054: } else {
! 1055: user_shost = user_host;
! 1056: }
1.1 misho 1057: } else {
1.1.1.2 ! misho 1058: user_host = user_shost = "localhost";
1.1 misho 1059: }
1.1.1.2 ! misho 1060: debug_return;
1.1 misho 1061: }
1062:
1.1.1.2 ! misho 1063: static bool
! 1064: alias_remove_recursive(char *name, int type)
1.1 misho 1065: {
1066: struct member *m;
1067: struct alias *a;
1.1.1.2 ! misho 1068: bool rval = true;
! 1069: debug_decl(alias_remove_recursive, SUDO_DEBUG_ALIAS)
1.1 misho 1070:
1071: if ((a = alias_find(name, type)) != NULL) {
1072: tq_foreach_fwd(&a->members, m) {
1073: if (m->type == ALIAS) {
1.1.1.2 ! misho 1074: if (!alias_remove_recursive(m->name, type))
! 1075: rval = false;
1.1 misho 1076: }
1077: }
1078: }
1079: alias_seqno++;
1080: a = alias_remove(name, type);
1081: if (a)
1082: rbinsert(alias_freelist, a);
1.1.1.2 ! misho 1083: debug_return_bool(rval);
1.1 misho 1084: }
1085:
1086: static int
1087: check_alias(char *name, int type, int strict, int quiet)
1088: {
1089: struct member *m;
1090: struct alias *a;
1.1.1.2 ! misho 1091: int errors = 0;
! 1092: debug_decl(check_alias, SUDO_DEBUG_ALIAS)
1.1 misho 1093:
1094: if ((a = alias_find(name, type)) != NULL) {
1095: /* check alias contents */
1096: tq_foreach_fwd(&a->members, m) {
1097: if (m->type == ALIAS)
1.1.1.2 ! misho 1098: errors += check_alias(m->name, type, strict, quiet);
1.1 misho 1099: }
1100: } else {
1101: if (!quiet) {
1102: char *fmt;
1103: if (errno == ELOOP) {
1104: fmt = strict ?
1105: _("Error: cycle in %s_Alias `%s'") :
1106: _("Warning: cycle in %s_Alias `%s'");
1107: } else {
1108: fmt = strict ?
1109: _("Error: %s_Alias `%s' referenced but not defined") :
1110: _("Warning: %s_Alias `%s' referenced but not defined");
1111: }
1112: warningx(fmt,
1113: type == HOSTALIAS ? "Host" : type == CMNDALIAS ? "Cmnd" :
1114: type == USERALIAS ? "User" : type == RUNASALIAS ? "Runas" :
1115: "Unknown", name);
1116: }
1.1.1.2 ! misho 1117: errors++;
1.1 misho 1118: }
1119:
1.1.1.2 ! misho 1120: debug_return_int(errors);
1.1 misho 1121: }
1122:
1123: /*
1124: * Iterate through the sudoers datastructures looking for undefined
1125: * aliases or unused aliases.
1126: */
1127: static int
1.1.1.2 ! misho 1128: check_aliases(bool strict, bool quiet)
1.1 misho 1129: {
1130: struct cmndspec *cs;
1131: struct member *m, *binding;
1132: struct privilege *priv;
1133: struct userspec *us;
1134: struct defaults *d;
1.1.1.2 ! misho 1135: int atype, errors = 0;
! 1136: debug_decl(check_aliases, SUDO_DEBUG_ALIAS)
1.1 misho 1137:
1138: alias_freelist = rbcreate(alias_compare);
1139:
1140: /* Forward check. */
1141: tq_foreach_fwd(&userspecs, us) {
1142: tq_foreach_fwd(&us->users, m) {
1143: if (m->type == ALIAS) {
1144: alias_seqno++;
1.1.1.2 ! misho 1145: errors += check_alias(m->name, USERALIAS, strict, quiet);
1.1 misho 1146: }
1147: }
1148: tq_foreach_fwd(&us->privileges, priv) {
1149: tq_foreach_fwd(&priv->hostlist, m) {
1150: if (m->type == ALIAS) {
1151: alias_seqno++;
1.1.1.2 ! misho 1152: errors += check_alias(m->name, HOSTALIAS, strict, quiet);
1.1 misho 1153: }
1154: }
1155: tq_foreach_fwd(&priv->cmndlist, cs) {
1156: tq_foreach_fwd(&cs->runasuserlist, m) {
1157: if (m->type == ALIAS) {
1158: alias_seqno++;
1.1.1.2 ! misho 1159: errors += check_alias(m->name, RUNASALIAS, strict, quiet);
1.1 misho 1160: }
1161: }
1162: if ((m = cs->cmnd)->type == ALIAS) {
1163: alias_seqno++;
1.1.1.2 ! misho 1164: errors += check_alias(m->name, CMNDALIAS, strict, quiet);
1.1 misho 1165: }
1166: }
1167: }
1168: }
1169:
1170: /* Reverse check (destructive) */
1171: tq_foreach_fwd(&userspecs, us) {
1172: tq_foreach_fwd(&us->users, m) {
1173: if (m->type == ALIAS) {
1174: alias_seqno++;
1.1.1.2 ! misho 1175: if (!alias_remove_recursive(m->name, USERALIAS))
! 1176: errors++;
1.1 misho 1177: }
1178: }
1179: tq_foreach_fwd(&us->privileges, priv) {
1180: tq_foreach_fwd(&priv->hostlist, m) {
1181: if (m->type == ALIAS) {
1182: alias_seqno++;
1.1.1.2 ! misho 1183: if (!alias_remove_recursive(m->name, HOSTALIAS))
! 1184: errors++;
1.1 misho 1185: }
1186: }
1187: tq_foreach_fwd(&priv->cmndlist, cs) {
1188: tq_foreach_fwd(&cs->runasuserlist, m) {
1189: if (m->type == ALIAS) {
1190: alias_seqno++;
1.1.1.2 ! misho 1191: if (!alias_remove_recursive(m->name, RUNASALIAS))
! 1192: errors++;
1.1 misho 1193: }
1194: }
1195: if ((m = cs->cmnd)->type == ALIAS) {
1196: alias_seqno++;
1.1.1.2 ! misho 1197: if (!alias_remove_recursive(m->name, CMNDALIAS))
! 1198: errors++;
1.1 misho 1199: }
1200: }
1201: }
1202: }
1203: tq_foreach_fwd(&defaults, d) {
1204: switch (d->type) {
1205: case DEFAULTS_HOST:
1206: atype = HOSTALIAS;
1207: break;
1208: case DEFAULTS_USER:
1209: atype = USERALIAS;
1210: break;
1211: case DEFAULTS_RUNAS:
1212: atype = RUNASALIAS;
1213: break;
1214: case DEFAULTS_CMND:
1215: atype = CMNDALIAS;
1216: break;
1217: default:
1218: continue; /* not an alias */
1219: }
1220: tq_foreach_fwd(&d->binding, binding) {
1221: for (m = binding; m != NULL; m = m->next) {
1222: if (m->type == ALIAS) {
1223: alias_seqno++;
1.1.1.2 ! misho 1224: if (!alias_remove_recursive(m->name, atype))
! 1225: errors++;
1.1 misho 1226: }
1227: }
1228: }
1229: }
1230: rbdestroy(alias_freelist, alias_free);
1231:
1232: /* If all aliases were referenced we will have an empty tree. */
1233: if (!no_aliases() && !quiet)
1234: alias_apply(print_unused, strict ? "Error" : "Warning");
1235:
1.1.1.2 ! misho 1236: debug_return_int(strict ? errors : 0);
1.1 misho 1237: }
1238:
1239: static int
1240: print_unused(void *v1, void *v2)
1241: {
1242: struct alias *a = (struct alias *)v1;
1243: char *prefix = (char *)v2;
1244:
1.1.1.2 ! misho 1245: warningx2(_("%s: unused %s_Alias %s"), prefix,
1.1 misho 1246: a->type == HOSTALIAS ? "Host" : a->type == CMNDALIAS ? "Cmnd" :
1247: a->type == USERALIAS ? "User" : a->type == RUNASALIAS ? "Runas" :
1248: "Unknown", a->name);
1249: return 0;
1250: }
1251:
1252: /*
1253: * Unlink any sudoers temp files that remain.
1254: */
1255: void
1256: cleanup(int gotsignal)
1257: {
1258: struct sudoersfile *sp;
1259:
1260: tq_foreach_fwd(&sudoerslist, sp) {
1261: if (sp->tpath != NULL)
1262: (void) unlink(sp->tpath);
1263: }
1264: if (!gotsignal) {
1265: sudo_endpwent();
1266: sudo_endgrent();
1267: }
1268: }
1269:
1270: /*
1271: * Unlink sudoers temp files (if any) and exit.
1272: */
1273: static void
1274: quit(int signo)
1275: {
1276: const char *signame, *myname;
1277:
1278: cleanup(signo);
1279: #define emsg " exiting due to signal: "
1280: myname = getprogname();
1281: signame = strsignal(signo);
1.1.1.2 ! misho 1282: ignore_result(write(STDERR_FILENO, myname, strlen(myname)));
! 1283: ignore_result(write(STDERR_FILENO, emsg, sizeof(emsg) - 1));
! 1284: ignore_result(write(STDERR_FILENO, signame, strlen(signame)));
! 1285: ignore_result(write(STDERR_FILENO, "\n", 1));
1.1 misho 1286: _exit(signo);
1287: }
1288:
1289: static void
1290: usage(int fatal)
1291: {
1292: (void) fprintf(fatal ? stderr : stdout,
1293: "usage: %s [-chqsV] [-f sudoers]\n", getprogname());
1294: if (fatal)
1295: exit(1);
1296: }
1297:
1298: static void
1299: help(void)
1300: {
1301: (void) printf(_("%s - safely edit the sudoers file\n\n"), getprogname());
1302: usage(0);
1303: (void) puts(_("\nOptions:\n"
1304: " -c check-only mode\n"
1305: " -f sudoers specify sudoers file location\n"
1306: " -h display help message and exit\n"
1307: " -q less verbose (quiet) syntax error messages\n"
1308: " -s strict syntax checking\n"
1309: " -V display version information and exit"));
1310: exit(0);
1311: }
1312:
1313: static int
1314: visudo_printf(int msg_type, const char *fmt, ...)
1315: {
1316: va_list ap;
1317: FILE *fp;
1318:
1319: switch (msg_type) {
1320: case SUDO_CONV_INFO_MSG:
1321: fp = stdout;
1322: break;
1323: case SUDO_CONV_ERROR_MSG:
1324: fp = stderr;
1325: break;
1326: default:
1327: errno = EINVAL;
1328: return -1;
1329: }
1330:
1331: va_start(ap, fmt);
1332: vfprintf(fp, fmt, ap);
1333: va_end(ap);
1334:
1335: return 0;
1336: }
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