1: /*
2: * Copyright (c) 1994-1996, 1998-2011 Todd C. Miller <Todd.Miller@courtesan.com>
3: *
4: * Permission to use, copy, modify, and distribute this software for any
5: * purpose with or without fee is hereby granted, provided that the above
6: * copyright notice and this permission notice appear in all copies.
7: *
8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15: *
16: * Sponsored in part by the Defense Advanced Research Projects
17: * Agency (DARPA) and Air Force Research Laboratory, Air Force
18: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
19: */
20:
21: #ifdef __TANDEM
22: # include <floss.h>
23: #endif
24:
25: #include <config.h>
26:
27: #include <sys/types.h>
28: #include <sys/param.h>
29: #include <sys/stat.h>
30: #include <sys/ioctl.h>
31: #include <sys/wait.h>
32: #include <stdio.h>
33: #ifdef STDC_HEADERS
34: # include <stdlib.h>
35: # include <stddef.h>
36: #else
37: # ifdef HAVE_STDLIB_H
38: # include <stdlib.h>
39: # endif
40: #endif /* STDC_HEADERS */
41: #ifdef HAVE_STRING_H
42: # include <string.h>
43: #endif /* HAVE_STRING_H */
44: #ifdef HAVE_STRINGS_H
45: # include <strings.h>
46: #endif /* HAVE_STRINGS_H */
47: #ifdef HAVE_UNISTD_H
48: # include <unistd.h>
49: #endif /* HAVE_UNISTD_H */
50: #ifdef HAVE_SETLOCALE
51: # include <locale.h>
52: #endif /* HAVE_SETLOCALE */
53: #ifdef HAVE_NL_LANGINFO
54: # include <langinfo.h>
55: #endif /* HAVE_NL_LANGINFO */
56: #include <pwd.h>
57: #include <grp.h>
58: #include <signal.h>
59: #include <time.h>
60: #include <ctype.h>
61: #include <errno.h>
62: #include <fcntl.h>
63: #include <setjmp.h>
64:
65: #include "sudoers.h"
66:
67: static void do_syslog(int, char *);
68: static void do_logfile(char *);
69: static void send_mail(const char *fmt, ...);
70: static int should_mail(int);
71: static void mysyslog(int, const char *, ...);
72: static char *new_logline(const char *, int);
73:
74: extern sigjmp_buf error_jmp;
75:
76: #define MAXSYSLOGTRIES 16 /* num of retries for broken syslogs */
77:
78: /*
79: * We do an openlog(3)/closelog(3) for each message because some
80: * authentication methods (notably PAM) use syslog(3) for their
81: * own nefarious purposes and may call openlog(3) and closelog(3).
82: * Note that because we don't want to assume that all systems have
83: * vsyslog(3) (HP-UX doesn't) "%m" will not be expanded.
84: * Sadly this is a maze of #ifdefs.
85: */
86: static void
87: mysyslog(int pri, const char *fmt, ...)
88: {
89: #ifdef BROKEN_SYSLOG
90: int i;
91: #endif
92: char buf[MAXSYSLOGLEN+1];
93: va_list ap;
94: debug_decl(mysyslog, SUDO_DEBUG_LOGGING)
95:
96: va_start(ap, fmt);
97: #ifdef LOG_NFACILITIES
98: openlog("sudo", 0, def_syslog);
99: #else
100: openlog("sudo", 0);
101: #endif
102: vsnprintf(buf, sizeof(buf), fmt, ap);
103: #ifdef BROKEN_SYSLOG
104: /*
105: * Some versions of syslog(3) don't guarantee success and return
106: * an int (notably HP-UX < 10.0). So, if at first we don't succeed,
107: * try, try again...
108: */
109: for (i = 0; i < MAXSYSLOGTRIES; i++)
110: if (syslog(pri, "%s", buf) == 0)
111: break;
112: #else
113: syslog(pri, "%s", buf);
114: #endif /* BROKEN_SYSLOG */
115: va_end(ap);
116: closelog();
117: debug_return;
118: }
119:
120: #define FMT_FIRST "%8s : %s"
121: #define FMT_CONTD "%8s : (command continued) %s"
122:
123: /*
124: * Log a message to syslog, pre-pending the username and splitting the
125: * message into parts if it is longer than MAXSYSLOGLEN.
126: */
127: static void
128: do_syslog(int pri, char *msg)
129: {
130: size_t len, maxlen;
131: char *p, *tmp, save;
132: const char *fmt;
133: debug_decl(do_syslog, SUDO_DEBUG_LOGGING)
134:
135: #ifdef HAVE_SETLOCALE
136: const char *old_locale = estrdup(setlocale(LC_ALL, NULL));
137: if (!setlocale(LC_ALL, def_sudoers_locale))
138: setlocale(LC_ALL, "C");
139: #endif /* HAVE_SETLOCALE */
140:
141: /*
142: * Log the full line, breaking into multiple syslog(3) calls if necessary
143: */
144: fmt = _(FMT_FIRST);
145: maxlen = MAXSYSLOGLEN - (strlen(fmt) - 5 + strlen(user_name));
146: for (p = msg; *p != '\0'; ) {
147: len = strlen(p);
148: if (len > maxlen) {
149: /*
150: * Break up the line into what will fit on one syslog(3) line
151: * Try to avoid breaking words into several lines if possible.
152: */
153: tmp = memrchr(p, ' ', maxlen);
154: if (tmp == NULL)
155: tmp = p + maxlen;
156:
157: /* NULL terminate line, but save the char to restore later */
158: save = *tmp;
159: *tmp = '\0';
160:
161: mysyslog(pri, fmt, user_name, p);
162:
163: *tmp = save; /* restore saved character */
164:
165: /* Advance p and eliminate leading whitespace */
166: for (p = tmp; *p == ' '; p++)
167: ;
168: } else {
169: mysyslog(pri, fmt, user_name, p);
170: p += len;
171: }
172: fmt = _(FMT_CONTD);
173: maxlen = MAXSYSLOGLEN - (strlen(fmt) - 5 + strlen(user_name));
174: }
175:
176: #ifdef HAVE_SETLOCALE
177: setlocale(LC_ALL, old_locale);
178: efree((void *)old_locale);
179: #endif /* HAVE_SETLOCALE */
180:
181: debug_return;
182: }
183:
184: static void
185: do_logfile(char *msg)
186: {
187: char *full_line;
188: size_t len;
189: mode_t oldmask;
190: time_t now;
191: FILE *fp;
192: debug_decl(do_logfile, SUDO_DEBUG_LOGGING)
193:
194: oldmask = umask(077);
195: fp = fopen(def_logfile, "a");
196: (void) umask(oldmask);
197: if (fp == NULL) {
198: send_mail(_("unable to open log file: %s: %s"),
199: def_logfile, strerror(errno));
200: } else if (!lock_file(fileno(fp), SUDO_LOCK)) {
201: send_mail(_("unable to lock log file: %s: %s"),
202: def_logfile, strerror(errno));
203: } else {
204: #ifdef HAVE_SETLOCALE
205: const char *old_locale = estrdup(setlocale(LC_ALL, NULL));
206: if (!setlocale(LC_ALL, def_sudoers_locale))
207: setlocale(LC_ALL, "C");
208: #endif /* HAVE_SETLOCALE */
209:
210: now = time(NULL);
211: if (def_loglinelen < sizeof(LOG_INDENT)) {
212: /* Don't pretty-print long log file lines (hard to grep) */
213: if (def_log_host)
214: (void) fprintf(fp, "%s : %s : HOST=%s : %s\n",
215: get_timestr(now, def_log_year), user_name, user_shost, msg);
216: else
217: (void) fprintf(fp, "%s : %s : %s\n",
218: get_timestr(now, def_log_year), user_name, msg);
219: } else {
220: if (def_log_host)
221: len = easprintf(&full_line, "%s : %s : HOST=%s : %s",
222: get_timestr(now, def_log_year), user_name, user_shost, msg);
223: else
224: len = easprintf(&full_line, "%s : %s : %s",
225: get_timestr(now, def_log_year), user_name, msg);
226:
227: /*
228: * Print out full_line with word wrap around def_loglinelen chars.
229: */
230: writeln_wrap(fp, full_line, len, def_loglinelen);
231: efree(full_line);
232: }
233: (void) fflush(fp);
234: (void) lock_file(fileno(fp), SUDO_UNLOCK);
235: (void) fclose(fp);
236:
237: #ifdef HAVE_SETLOCALE
238: setlocale(LC_ALL, old_locale);
239: efree((void *)old_locale);
240: #endif /* HAVE_SETLOCALE */
241: }
242: debug_return;
243: }
244:
245: /*
246: * Log and mail the denial message, optionally informing the user.
247: */
248: void
249: log_denial(int status, int inform_user)
250: {
251: char *logline, *message;
252: debug_decl(log_denial, SUDO_DEBUG_LOGGING)
253:
254: /* Set error message. */
255: if (ISSET(status, FLAG_NO_USER))
256: message = _("user NOT in sudoers");
257: else if (ISSET(status, FLAG_NO_HOST))
258: message = _("user NOT authorized on host");
259: else
260: message = _("command not allowed");
261:
262: logline = new_logline(message, 0);
263:
264: if (should_mail(status))
265: send_mail("%s", logline); /* send mail based on status */
266:
267: /* Inform the user if they failed to authenticate. */
268: if (inform_user) {
269: if (ISSET(status, FLAG_NO_USER)) {
270: sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not in the sudoers "
271: "file. This incident will be reported.\n"), user_name);
272: } else if (ISSET(status, FLAG_NO_HOST)) {
273: sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not allowed to run sudo "
274: "on %s. This incident will be reported.\n"),
275: user_name, user_shost);
276: } else if (ISSET(status, FLAG_NO_CHECK)) {
277: sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s may not run "
278: "sudo on %s.\n"), user_name, user_shost);
279: } else {
280: sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s is not allowed "
281: "to execute '%s%s%s' as %s%s%s on %s.\n"),
282: user_name, user_cmnd, user_args ? " " : "",
283: user_args ? user_args : "",
284: list_pw ? list_pw->pw_name : runas_pw ?
285: runas_pw->pw_name : user_name, runas_gr ? ":" : "",
286: runas_gr ? runas_gr->gr_name : "", user_host);
287: }
288: }
289:
290: /*
291: * Log via syslog and/or a file.
292: */
293: if (def_syslog)
294: do_syslog(def_syslog_badpri, logline);
295: if (def_logfile)
296: do_logfile(logline);
297:
298: efree(logline);
299: debug_return;
300: }
301:
302: /*
303: * Log and potentially mail the allowed command.
304: */
305: void
306: log_allowed(int status)
307: {
308: char *logline;
309: debug_decl(log_allowed, SUDO_DEBUG_LOGGING)
310:
311: logline = new_logline(NULL, 0);
312:
313: if (should_mail(status))
314: send_mail("%s", logline); /* send mail based on status */
315:
316: /*
317: * Log via syslog and/or a file.
318: */
319: if (def_syslog)
320: do_syslog(def_syslog_goodpri, logline);
321: if (def_logfile)
322: do_logfile(logline);
323:
324: efree(logline);
325: debug_return;
326: }
327:
328: /*
329: * Perform logging for log_error()/log_fatal()
330: */
331: static void
332: vlog_error(int flags, const char *fmt, va_list ap)
333: {
334: int serrno = errno;
335: char *logline, *message;
336: debug_decl(vlog_error, SUDO_DEBUG_LOGGING)
337:
338: /* Expand printf-style format + args. */
339: evasprintf(&message, fmt, ap);
340:
341: /* Become root if we are not already to avoid user interference */
342: set_perms(PERM_ROOT|PERM_NOEXIT);
343:
344: if (ISSET(flags, MSG_ONLY))
345: logline = message;
346: else
347: logline = new_logline(message, ISSET(flags, USE_ERRNO) ? serrno : 0);
348:
349: /*
350: * Tell the user.
351: */
352: if (!ISSET(flags, NO_STDERR)) {
353: if (ISSET(flags, USE_ERRNO))
354: warning("%s", message);
355: else
356: warningx("%s", message);
357: }
358: if (logline != message)
359: efree(message);
360:
361: /*
362: * Send a copy of the error via mail.
363: */
364: if (!ISSET(flags, NO_MAIL))
365: send_mail("%s", logline);
366:
367: /*
368: * Log to syslog and/or a file.
369: */
370: if (def_syslog)
371: do_syslog(def_syslog_badpri, logline);
372: if (def_logfile)
373: do_logfile(logline);
374:
375: efree(logline);
376:
377: restore_perms();
378:
379: debug_return;
380: }
381:
382: void
383: log_error(int flags, const char *fmt, ...)
384: {
385: va_list ap;
386: debug_decl(log_error, SUDO_DEBUG_LOGGING)
387:
388: /* Log the error. */
389: va_start(ap, fmt);
390: vlog_error(flags, fmt, ap);
391: va_end(ap);
392:
393: debug_return;
394: }
395:
396: void
397: log_fatal(int flags, const char *fmt, ...)
398: {
399: va_list ap;
400: debug_decl(log_error, SUDO_DEBUG_LOGGING)
401:
402: /* Log the error. */
403: va_start(ap, fmt);
404: vlog_error(flags, fmt, ap);
405: va_end(ap);
406:
407: /* Exit the plugin. */
408: plugin_cleanup(0);
409: sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
410: siglongjmp(error_jmp, 1);
411: }
412:
413: #define MAX_MAILFLAGS 63
414:
415: /*
416: * Send a message to MAILTO user
417: */
418: static void
419: send_mail(const char *fmt, ...)
420: {
421: FILE *mail;
422: char *p;
423: int fd, pfd[2], status;
424: pid_t pid, rv;
425: sigaction_t sa;
426: va_list ap;
427: #ifndef NO_ROOT_MAILER
428: static char *root_envp[] = {
429: "HOME=/",
430: "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
431: "LOGNAME=root",
432: "USERNAME=root",
433: "USER=root",
434: NULL
435: };
436: #endif /* NO_ROOT_MAILER */
437: debug_decl(send_mail, SUDO_DEBUG_LOGGING)
438:
439: /* Just return if mailer is disabled. */
440: if (!def_mailerpath || !def_mailto)
441: debug_return;
442:
443: /* Fork and return, child will daemonize. */
444: switch (pid = sudo_debug_fork()) {
445: case -1:
446: /* Error. */
447: error(1, _("unable to fork"));
448: break;
449: case 0:
450: /* Child. */
451: switch (pid = fork()) {
452: case -1:
453: /* Error. */
454: mysyslog(LOG_ERR, _("unable to fork: %m"));
455: sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to fork: %s",
456: strerror(errno));
457: _exit(1);
458: case 0:
459: /* Grandchild continues below. */
460: break;
461: default:
462: /* Parent will wait for us. */
463: _exit(0);
464: }
465: break;
466: default:
467: /* Parent. */
468: do {
469: rv = waitpid(pid, &status, 0);
470: } while (rv == -1 && errno == EINTR);
471: return; /* not debug */
472: }
473:
474: /* Daemonize - disassociate from session/tty. */
475: if (setsid() == -1)
476: warning("setsid");
477: if (chdir("/") == -1)
478: warning("chdir(/)");
479: if ((fd = open(_PATH_DEVNULL, O_RDWR, 0644)) != -1) {
480: (void) dup2(fd, STDIN_FILENO);
481: (void) dup2(fd, STDOUT_FILENO);
482: (void) dup2(fd, STDERR_FILENO);
483: }
484:
485: #ifdef HAVE_SETLOCALE
486: if (!setlocale(LC_ALL, def_sudoers_locale)) {
487: setlocale(LC_ALL, "C");
488: efree(def_sudoers_locale);
489: def_sudoers_locale = estrdup("C");
490: }
491: #endif /* HAVE_SETLOCALE */
492:
493: /* Close password, group and other fds so we don't leak. */
494: sudo_endpwent();
495: sudo_endgrent();
496: closefrom(STDERR_FILENO + 1);
497:
498: /* Ignore SIGPIPE in case mailer exits prematurely (or is missing). */
499: zero_bytes(&sa, sizeof(sa));
500: sigemptyset(&sa.sa_mask);
501: sa.sa_flags = SA_INTERRUPT;
502: sa.sa_handler = SIG_IGN;
503: (void) sigaction(SIGPIPE, &sa, NULL);
504:
505: if (pipe(pfd) == -1) {
506: mysyslog(LOG_ERR, _("unable to open pipe: %m"));
507: sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to open pipe: %s",
508: strerror(errno));
509: sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
510: _exit(1);
511: }
512:
513: switch (pid = sudo_debug_fork()) {
514: case -1:
515: /* Error. */
516: mysyslog(LOG_ERR, _("unable to fork: %m"));
517: sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to fork: %s",
518: strerror(errno));
519: sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
520: _exit(1);
521: break;
522: case 0:
523: {
524: char *argv[MAX_MAILFLAGS + 1];
525: char *mpath, *mflags;
526: int i;
527:
528: /* Child, set stdin to output side of the pipe */
529: if (pfd[0] != STDIN_FILENO) {
530: if (dup2(pfd[0], STDIN_FILENO) == -1) {
531: mysyslog(LOG_ERR, _("unable to dup stdin: %m"));
532: sudo_debug_printf(SUDO_DEBUG_ERROR,
533: "unable to dup stdin: %s", strerror(errno));
534: _exit(127);
535: }
536: (void) close(pfd[0]);
537: }
538: (void) close(pfd[1]);
539:
540: /* Build up an argv based on the mailer path and flags */
541: mflags = estrdup(def_mailerflags);
542: mpath = estrdup(def_mailerpath);
543: if ((argv[0] = strrchr(mpath, ' ')))
544: argv[0]++;
545: else
546: argv[0] = mpath;
547:
548: i = 1;
549: if ((p = strtok(mflags, " \t"))) {
550: do {
551: argv[i] = p;
552: } while (++i < MAX_MAILFLAGS && (p = strtok(NULL, " \t")));
553: }
554: argv[i] = NULL;
555:
556: /*
557: * Depending on the config, either run the mailer as root
558: * (so user cannot kill it) or as the user (for the paranoid).
559: */
560: #ifndef NO_ROOT_MAILER
561: set_perms(PERM_ROOT|PERM_NOEXIT);
562: execve(mpath, argv, root_envp);
563: #else
564: set_perms(PERM_FULL_USER|PERM_NOEXIT);
565: execv(mpath, argv);
566: #endif /* NO_ROOT_MAILER */
567: mysyslog(LOG_ERR, _("unable to execute %s: %m"), mpath);
568: sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to execute %s: %s",
569: mpath, strerror(errno));
570: _exit(127);
571: }
572: break;
573: }
574:
575: (void) close(pfd[0]);
576: mail = fdopen(pfd[1], "w");
577:
578: /* Pipes are all setup, send message. */
579: (void) fprintf(mail, "To: %s\nFrom: %s\nAuto-Submitted: %s\nSubject: ",
580: def_mailto, def_mailfrom ? def_mailfrom : user_name, "auto-generated");
581: for (p = def_mailsub; *p; p++) {
582: /* Expand escapes in the subject */
583: if (*p == '%' && *(p+1) != '%') {
584: switch (*(++p)) {
585: case 'h':
586: (void) fputs(user_host, mail);
587: break;
588: case 'u':
589: (void) fputs(user_name, mail);
590: break;
591: default:
592: p--;
593: break;
594: }
595: } else
596: (void) fputc(*p, mail);
597: }
598:
599: #ifdef HAVE_NL_LANGINFO
600: if (strcmp(def_sudoers_locale, "C") != 0)
601: (void) fprintf(mail, "\nContent-Type: text/plain; charset=\"%s\"\nContent-Transfer-Encoding: 8bit", nl_langinfo(CODESET));
602: #endif /* HAVE_NL_LANGINFO */
603:
604: (void) fprintf(mail, "\n\n%s : %s : %s : ", user_host,
605: get_timestr(time(NULL), def_log_year), user_name);
606: va_start(ap, fmt);
607: (void) vfprintf(mail, fmt, ap);
608: va_end(ap);
609: fputs("\n\n", mail);
610:
611: fclose(mail);
612: do {
613: rv = waitpid(pid, &status, 0);
614: } while (rv == -1 && errno == EINTR);
615: sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
616: _exit(0);
617: }
618:
619: /*
620: * Determine whether we should send mail based on "status" and defaults options.
621: */
622: static int
623: should_mail(int status)
624: {
625: debug_decl(should_mail, SUDO_DEBUG_LOGGING)
626:
627: debug_return_bool(def_mail_always || ISSET(status, VALIDATE_ERROR) ||
628: (def_mail_no_user && ISSET(status, FLAG_NO_USER)) ||
629: (def_mail_no_host && ISSET(status, FLAG_NO_HOST)) ||
630: (def_mail_no_perms && !ISSET(status, VALIDATE_OK)));
631: }
632:
633: #define LL_TTY_STR "TTY="
634: #define LL_CWD_STR "PWD=" /* XXX - should be CWD= */
635: #define LL_USER_STR "USER="
636: #define LL_GROUP_STR "GROUP="
637: #define LL_ENV_STR "ENV="
638: #define LL_CMND_STR "COMMAND="
639: #define LL_TSID_STR "TSID="
640:
641: #define IS_SESSID(s) ( \
642: isalnum((unsigned char)(s)[0]) && isalnum((unsigned char)(s)[1]) && \
643: (s)[2] == '/' && \
644: isalnum((unsigned char)(s)[3]) && isalnum((unsigned char)(s)[4]) && \
645: (s)[5] == '/' && \
646: isalnum((unsigned char)(s)[6]) && isalnum((unsigned char)(s)[7]) && \
647: (s)[8] == '\0')
648:
649: /*
650: * Allocate and fill in a new logline.
651: */
652: static char *
653: new_logline(const char *message, int serrno)
654: {
655: size_t len = 0;
656: char *errstr = NULL;
657: char *evstr = NULL;
658: char *line, sessid[7], *tsid = NULL;
659: debug_decl(new_logline, SUDO_DEBUG_LOGGING)
660:
661: /* A TSID may be a sudoers-style session ID or a free-form string. */
662: if (sudo_user.iolog_file != NULL) {
663: if (IS_SESSID(sudo_user.iolog_file)) {
664: sessid[0] = sudo_user.iolog_file[0];
665: sessid[1] = sudo_user.iolog_file[1];
666: sessid[2] = sudo_user.iolog_file[3];
667: sessid[3] = sudo_user.iolog_file[4];
668: sessid[4] = sudo_user.iolog_file[6];
669: sessid[5] = sudo_user.iolog_file[7];
670: sessid[6] = '\0';
671: tsid = sessid;
672: } else {
673: tsid = sudo_user.iolog_file;
674: }
675: }
676:
677: /*
678: * Compute line length
679: */
680: if (message != NULL)
681: len += strlen(message) + 3;
682: if (serrno) {
683: errstr = strerror(serrno);
684: len += strlen(errstr) + 3;
685: }
686: len += sizeof(LL_TTY_STR) + 2 + strlen(user_tty);
687: len += sizeof(LL_CWD_STR) + 2 + strlen(user_cwd);
688: if (runas_pw != NULL)
689: len += sizeof(LL_USER_STR) + 2 + strlen(runas_pw->pw_name);
690: if (runas_gr != NULL)
691: len += sizeof(LL_GROUP_STR) + 2 + strlen(runas_gr->gr_name);
692: if (tsid != NULL)
693: len += sizeof(LL_TSID_STR) + 2 + strlen(tsid);
694: if (sudo_user.env_vars != NULL) {
695: size_t evlen = 0;
696: char * const *ep;
697:
698: for (ep = sudo_user.env_vars; *ep != NULL; ep++)
699: evlen += strlen(*ep) + 1;
700: evstr = emalloc(evlen);
701: evstr[0] = '\0';
702: for (ep = sudo_user.env_vars; *ep != NULL; ep++) {
703: strlcat(evstr, *ep, evlen);
704: strlcat(evstr, " ", evlen); /* NOTE: last one will fail */
705: }
706: len += sizeof(LL_ENV_STR) + 2 + evlen;
707: }
708: if (user_cmnd != NULL) {
709: /* Note: we log "sudo -l command arg ..." as "list command arg ..." */
710: len += sizeof(LL_CMND_STR) - 1 + strlen(user_cmnd);
711: if (ISSET(sudo_mode, MODE_CHECK))
712: len += sizeof("list ") - 1;
713: if (user_args != NULL)
714: len += strlen(user_args) + 1;
715: }
716:
717: /*
718: * Allocate and build up the line.
719: */
720: line = emalloc(++len);
721: line[0] = '\0';
722:
723: if (message != NULL) {
724: if (strlcat(line, message, len) >= len ||
725: strlcat(line, errstr ? " : " : " ; ", len) >= len)
726: goto toobig;
727: }
728: if (serrno) {
729: if (strlcat(line, errstr, len) >= len ||
730: strlcat(line, " ; ", len) >= len)
731: goto toobig;
732: }
733: if (strlcat(line, LL_TTY_STR, len) >= len ||
734: strlcat(line, user_tty, len) >= len ||
735: strlcat(line, " ; ", len) >= len)
736: goto toobig;
737: if (strlcat(line, LL_CWD_STR, len) >= len ||
738: strlcat(line, user_cwd, len) >= len ||
739: strlcat(line, " ; ", len) >= len)
740: goto toobig;
741: if (runas_pw != NULL) {
742: if (strlcat(line, LL_USER_STR, len) >= len ||
743: strlcat(line, runas_pw->pw_name, len) >= len ||
744: strlcat(line, " ; ", len) >= len)
745: goto toobig;
746: }
747: if (runas_gr != NULL) {
748: if (strlcat(line, LL_GROUP_STR, len) >= len ||
749: strlcat(line, runas_gr->gr_name, len) >= len ||
750: strlcat(line, " ; ", len) >= len)
751: goto toobig;
752: }
753: if (tsid != NULL) {
754: if (strlcat(line, LL_TSID_STR, len) >= len ||
755: strlcat(line, tsid, len) >= len ||
756: strlcat(line, " ; ", len) >= len)
757: goto toobig;
758: }
759: if (evstr != NULL) {
760: if (strlcat(line, LL_ENV_STR, len) >= len ||
761: strlcat(line, evstr, len) >= len ||
762: strlcat(line, " ; ", len) >= len)
763: goto toobig;
764: efree(evstr);
765: }
766: if (user_cmnd != NULL) {
767: if (strlcat(line, LL_CMND_STR, len) >= len)
768: goto toobig;
769: if (ISSET(sudo_mode, MODE_CHECK) && strlcat(line, "list ", len) >= len)
770: goto toobig;
771: if (strlcat(line, user_cmnd, len) >= len)
772: goto toobig;
773: if (user_args != NULL) {
774: if (strlcat(line, " ", len) >= len ||
775: strlcat(line, user_args, len) >= len)
776: goto toobig;
777: }
778: }
779:
780: debug_return_str(line);
781: toobig:
782: errorx(1, _("internal error: insufficient space for log line"));
783: }
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