Annotation of embedaddon/sudo/plugins/sudoers/logging.c, revision 1.1
1.1 ! misho 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:
! 95: va_start(ap, fmt);
! 96: #ifdef LOG_NFACILITIES
! 97: openlog("sudo", 0, def_syslog);
! 98: #else
! 99: openlog("sudo", 0);
! 100: #endif
! 101: vsnprintf(buf, sizeof(buf), fmt, ap);
! 102: #ifdef BROKEN_SYSLOG
! 103: /*
! 104: * Some versions of syslog(3) don't guarantee success and return
! 105: * an int (notably HP-UX < 10.0). So, if at first we don't succeed,
! 106: * try, try again...
! 107: */
! 108: for (i = 0; i < MAXSYSLOGTRIES; i++)
! 109: if (syslog(pri, "%s", buf) == 0)
! 110: break;
! 111: #else
! 112: syslog(pri, "%s", buf);
! 113: #endif /* BROKEN_SYSLOG */
! 114: va_end(ap);
! 115: closelog();
! 116: }
! 117:
! 118: #define FMT_FIRST "%8s : %s"
! 119: #define FMT_CONTD "%8s : (command continued) %s"
! 120:
! 121: /*
! 122: * Log a message to syslog, pre-pending the username and splitting the
! 123: * message into parts if it is longer than MAXSYSLOGLEN.
! 124: */
! 125: static void
! 126: do_syslog(int pri, char *msg)
! 127: {
! 128: size_t len, maxlen;
! 129: char *p, *tmp, save;
! 130: const char *fmt;
! 131:
! 132: #ifdef HAVE_SETLOCALE
! 133: const char *old_locale = estrdup(setlocale(LC_ALL, NULL));
! 134: if (!setlocale(LC_ALL, def_sudoers_locale))
! 135: setlocale(LC_ALL, "C");
! 136: #endif /* HAVE_SETLOCALE */
! 137:
! 138: /*
! 139: * Log the full line, breaking into multiple syslog(3) calls if necessary
! 140: */
! 141: fmt = _(FMT_FIRST);
! 142: maxlen = MAXSYSLOGLEN - (strlen(fmt) - 5 + strlen(user_name));
! 143: for (p = msg; *p != '\0'; ) {
! 144: len = strlen(p);
! 145: if (len > maxlen) {
! 146: /*
! 147: * Break up the line into what will fit on one syslog(3) line
! 148: * Try to avoid breaking words into several lines if possible.
! 149: */
! 150: tmp = memrchr(p, ' ', maxlen);
! 151: if (tmp == NULL)
! 152: tmp = p + maxlen;
! 153:
! 154: /* NULL terminate line, but save the char to restore later */
! 155: save = *tmp;
! 156: *tmp = '\0';
! 157:
! 158: mysyslog(pri, fmt, user_name, p);
! 159:
! 160: *tmp = save; /* restore saved character */
! 161:
! 162: /* Advance p and eliminate leading whitespace */
! 163: for (p = tmp; *p == ' '; p++)
! 164: ;
! 165: } else {
! 166: mysyslog(pri, fmt, user_name, p);
! 167: p += len;
! 168: }
! 169: fmt = _(FMT_CONTD);
! 170: maxlen = MAXSYSLOGLEN - (strlen(fmt) - 5 + strlen(user_name));
! 171: }
! 172:
! 173: #ifdef HAVE_SETLOCALE
! 174: setlocale(LC_ALL, old_locale);
! 175: efree((void *)old_locale);
! 176: #endif /* HAVE_SETLOCALE */
! 177: }
! 178:
! 179: static void
! 180: do_logfile(char *msg)
! 181: {
! 182: char *full_line;
! 183: size_t len;
! 184: mode_t oldmask;
! 185: time_t now;
! 186: FILE *fp;
! 187:
! 188: oldmask = umask(077);
! 189: fp = fopen(def_logfile, "a");
! 190: (void) umask(oldmask);
! 191: if (fp == NULL) {
! 192: send_mail(_("unable to open log file: %s: %s"),
! 193: def_logfile, strerror(errno));
! 194: } else if (!lock_file(fileno(fp), SUDO_LOCK)) {
! 195: send_mail(_("unable to lock log file: %s: %s"),
! 196: def_logfile, strerror(errno));
! 197: } else {
! 198: #ifdef HAVE_SETLOCALE
! 199: const char *old_locale = estrdup(setlocale(LC_ALL, NULL));
! 200: if (!setlocale(LC_ALL, def_sudoers_locale))
! 201: setlocale(LC_ALL, "C");
! 202: #endif /* HAVE_SETLOCALE */
! 203:
! 204: now = time(NULL);
! 205: if (def_loglinelen < sizeof(LOG_INDENT)) {
! 206: /* Don't pretty-print long log file lines (hard to grep) */
! 207: if (def_log_host)
! 208: (void) fprintf(fp, "%s : %s : HOST=%s : %s\n",
! 209: get_timestr(now, def_log_year), user_name, user_shost, msg);
! 210: else
! 211: (void) fprintf(fp, "%s : %s : %s\n",
! 212: get_timestr(now, def_log_year), user_name, msg);
! 213: } else {
! 214: if (def_log_host)
! 215: len = easprintf(&full_line, "%s : %s : HOST=%s : %s",
! 216: get_timestr(now, def_log_year), user_name, user_shost, msg);
! 217: else
! 218: len = easprintf(&full_line, "%s : %s : %s",
! 219: get_timestr(now, def_log_year), user_name, msg);
! 220:
! 221: /*
! 222: * Print out full_line with word wrap around def_loglinelen chars.
! 223: */
! 224: writeln_wrap(fp, full_line, len, def_loglinelen);
! 225: efree(full_line);
! 226: }
! 227: (void) fflush(fp);
! 228: (void) lock_file(fileno(fp), SUDO_UNLOCK);
! 229: (void) fclose(fp);
! 230:
! 231: #ifdef HAVE_SETLOCALE
! 232: setlocale(LC_ALL, old_locale);
! 233: efree((void *)old_locale);
! 234: #endif /* HAVE_SETLOCALE */
! 235: }
! 236: }
! 237:
! 238: /*
! 239: * Log and mail the denial message, optionally informing the user.
! 240: */
! 241: void
! 242: log_denial(int status, int inform_user)
! 243: {
! 244: char *message;
! 245: char *logline;
! 246:
! 247: /* Set error message. */
! 248: if (ISSET(status, FLAG_NO_USER))
! 249: message = _("user NOT in sudoers");
! 250: else if (ISSET(status, FLAG_NO_HOST))
! 251: message = _("user NOT authorized on host");
! 252: else
! 253: message = _("command not allowed");
! 254:
! 255: logline = new_logline(message, 0);
! 256:
! 257: if (should_mail(status))
! 258: send_mail("%s", logline); /* send mail based on status */
! 259:
! 260: /* Inform the user if they failed to authenticate. */
! 261: if (inform_user) {
! 262: if (ISSET(status, FLAG_NO_USER)) {
! 263: sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not in the sudoers "
! 264: "file. This incident will be reported.\n"), user_name);
! 265: } else if (ISSET(status, FLAG_NO_HOST)) {
! 266: sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not allowed to run sudo "
! 267: "on %s. This incident will be reported.\n"),
! 268: user_name, user_shost);
! 269: } else if (ISSET(status, FLAG_NO_CHECK)) {
! 270: sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s may not run "
! 271: "sudo on %s.\n"), user_name, user_shost);
! 272: } else {
! 273: sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s is not allowed "
! 274: "to execute '%s%s%s' as %s%s%s on %s.\n"),
! 275: user_name, user_cmnd, user_args ? " " : "",
! 276: user_args ? user_args : "",
! 277: list_pw ? list_pw->pw_name : runas_pw ?
! 278: runas_pw->pw_name : user_name, runas_gr ? ":" : "",
! 279: runas_gr ? runas_gr->gr_name : "", user_host);
! 280: }
! 281: }
! 282:
! 283: /*
! 284: * Log via syslog and/or a file.
! 285: */
! 286: if (def_syslog)
! 287: do_syslog(def_syslog_badpri, logline);
! 288: if (def_logfile)
! 289: do_logfile(logline);
! 290:
! 291: efree(logline);
! 292: }
! 293:
! 294: /*
! 295: * Log and potentially mail the allowed command.
! 296: */
! 297: void
! 298: log_allowed(int status)
! 299: {
! 300: char *logline;
! 301:
! 302: logline = new_logline(NULL, 0);
! 303:
! 304: if (should_mail(status))
! 305: send_mail("%s", logline); /* send mail based on status */
! 306:
! 307: /*
! 308: * Log via syslog and/or a file.
! 309: */
! 310: if (def_syslog)
! 311: do_syslog(def_syslog_goodpri, logline);
! 312: if (def_logfile)
! 313: do_logfile(logline);
! 314:
! 315: efree(logline);
! 316: }
! 317:
! 318: void
! 319: log_error(int flags, const char *fmt, ...)
! 320: {
! 321: int serrno = errno;
! 322: char *message;
! 323: char *logline;
! 324: va_list ap;
! 325:
! 326: /* Expand printf-style format + args. */
! 327: va_start(ap, fmt);
! 328: evasprintf(&message, fmt, ap);
! 329: va_end(ap);
! 330:
! 331: /* Become root if we are not already to avoid user interference */
! 332: set_perms(PERM_ROOT|PERM_NOEXIT);
! 333:
! 334: if (ISSET(flags, MSG_ONLY))
! 335: logline = message;
! 336: else
! 337: logline = new_logline(message, ISSET(flags, USE_ERRNO) ? serrno : 0);
! 338:
! 339: /*
! 340: * Tell the user.
! 341: */
! 342: if (!ISSET(flags, NO_STDERR)) {
! 343: if (ISSET(flags, USE_ERRNO))
! 344: warning("%s", message);
! 345: else
! 346: warningx("%s", message);
! 347: }
! 348: if (logline != message)
! 349: efree(message);
! 350:
! 351: /*
! 352: * Send a copy of the error via mail.
! 353: */
! 354: if (!ISSET(flags, NO_MAIL))
! 355: send_mail("%s", logline);
! 356:
! 357: /*
! 358: * Log to syslog and/or a file.
! 359: */
! 360: if (def_syslog)
! 361: do_syslog(def_syslog_badpri, logline);
! 362: if (def_logfile)
! 363: do_logfile(logline);
! 364:
! 365: efree(logline);
! 366:
! 367: restore_perms();
! 368:
! 369: if (!ISSET(flags, NO_EXIT)) {
! 370: plugin_cleanup(0);
! 371: siglongjmp(error_jmp, 1);
! 372: }
! 373: }
! 374:
! 375: #define MAX_MAILFLAGS 63
! 376:
! 377: /*
! 378: * Send a message to MAILTO user
! 379: */
! 380: static void
! 381: send_mail(const char *fmt, ...)
! 382: {
! 383: FILE *mail;
! 384: char *p;
! 385: int fd, pfd[2], status;
! 386: pid_t pid, rv;
! 387: sigaction_t sa;
! 388: va_list ap;
! 389: #ifndef NO_ROOT_MAILER
! 390: static char *root_envp[] = {
! 391: "HOME=/",
! 392: "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
! 393: "LOGNAME=root",
! 394: "USERNAME=root",
! 395: "USER=root",
! 396: NULL
! 397: };
! 398: #endif /* NO_ROOT_MAILER */
! 399:
! 400: /* Just return if mailer is disabled. */
! 401: if (!def_mailerpath || !def_mailto)
! 402: return;
! 403:
! 404: /* Fork and return, child will daemonize. */
! 405: switch (pid = fork()) {
! 406: case -1:
! 407: /* Error. */
! 408: error(1, _("unable to fork"));
! 409: break;
! 410: case 0:
! 411: /* Child. */
! 412: switch (pid = fork()) {
! 413: case -1:
! 414: /* Error. */
! 415: mysyslog(LOG_ERR, _("unable to fork: %m"));
! 416: _exit(1);
! 417: case 0:
! 418: /* Grandchild continues below. */
! 419: break;
! 420: default:
! 421: /* Parent will wait for us. */
! 422: _exit(0);
! 423: }
! 424: break;
! 425: default:
! 426: /* Parent. */
! 427: do {
! 428: rv = waitpid(pid, &status, 0);
! 429: } while (rv == -1 && errno == EINTR);
! 430: return;
! 431: }
! 432:
! 433: /* Daemonize - disassociate from session/tty. */
! 434: if (setsid() == -1)
! 435: warning("setsid");
! 436: if (chdir("/") == -1)
! 437: warning("chdir(/)");
! 438: if ((fd = open(_PATH_DEVNULL, O_RDWR, 0644)) != -1) {
! 439: (void) dup2(fd, STDIN_FILENO);
! 440: (void) dup2(fd, STDOUT_FILENO);
! 441: (void) dup2(fd, STDERR_FILENO);
! 442: }
! 443:
! 444: #ifdef HAVE_SETLOCALE
! 445: if (!setlocale(LC_ALL, def_sudoers_locale)) {
! 446: setlocale(LC_ALL, "C");
! 447: efree(def_sudoers_locale);
! 448: def_sudoers_locale = estrdup("C");
! 449: }
! 450: #endif /* HAVE_SETLOCALE */
! 451:
! 452: /* Close password, group and other fds so we don't leak. */
! 453: sudo_endpwent();
! 454: sudo_endgrent();
! 455: closefrom(STDERR_FILENO + 1);
! 456:
! 457: /* Ignore SIGPIPE in case mailer exits prematurely (or is missing). */
! 458: zero_bytes(&sa, sizeof(sa));
! 459: sigemptyset(&sa.sa_mask);
! 460: sa.sa_flags = SA_INTERRUPT;
! 461: sa.sa_handler = SIG_IGN;
! 462: (void) sigaction(SIGPIPE, &sa, NULL);
! 463:
! 464: if (pipe(pfd) == -1) {
! 465: mysyslog(LOG_ERR, _("unable to open pipe: %m"));
! 466: _exit(1);
! 467: }
! 468:
! 469: switch (pid = fork()) {
! 470: case -1:
! 471: /* Error. */
! 472: mysyslog(LOG_ERR, _("unable to fork: %m"));
! 473: _exit(1);
! 474: break;
! 475: case 0:
! 476: {
! 477: char *argv[MAX_MAILFLAGS + 1];
! 478: char *mpath, *mflags;
! 479: int i;
! 480:
! 481: /* Child, set stdin to output side of the pipe */
! 482: if (pfd[0] != STDIN_FILENO) {
! 483: if (dup2(pfd[0], STDIN_FILENO) == -1) {
! 484: mysyslog(LOG_ERR, _("unable to dup stdin: %m"));
! 485: _exit(127);
! 486: }
! 487: (void) close(pfd[0]);
! 488: }
! 489: (void) close(pfd[1]);
! 490:
! 491: /* Build up an argv based on the mailer path and flags */
! 492: mflags = estrdup(def_mailerflags);
! 493: mpath = estrdup(def_mailerpath);
! 494: if ((argv[0] = strrchr(mpath, ' ')))
! 495: argv[0]++;
! 496: else
! 497: argv[0] = mpath;
! 498:
! 499: i = 1;
! 500: if ((p = strtok(mflags, " \t"))) {
! 501: do {
! 502: argv[i] = p;
! 503: } while (++i < MAX_MAILFLAGS && (p = strtok(NULL, " \t")));
! 504: }
! 505: argv[i] = NULL;
! 506:
! 507: /*
! 508: * Depending on the config, either run the mailer as root
! 509: * (so user cannot kill it) or as the user (for the paranoid).
! 510: */
! 511: #ifndef NO_ROOT_MAILER
! 512: set_perms(PERM_ROOT|PERM_NOEXIT);
! 513: execve(mpath, argv, root_envp);
! 514: #else
! 515: set_perms(PERM_FULL_USER|PERM_NOEXIT);
! 516: execv(mpath, argv);
! 517: #endif /* NO_ROOT_MAILER */
! 518: mysyslog(LOG_ERR, _("unable to execute %s: %m"), mpath);
! 519: _exit(127);
! 520: }
! 521: break;
! 522: }
! 523:
! 524: (void) close(pfd[0]);
! 525: mail = fdopen(pfd[1], "w");
! 526:
! 527: /* Pipes are all setup, send message. */
! 528: (void) fprintf(mail, "To: %s\nFrom: %s\nAuto-Submitted: %s\nSubject: ",
! 529: def_mailto, def_mailfrom ? def_mailfrom : user_name, "auto-generated");
! 530: for (p = def_mailsub; *p; p++) {
! 531: /* Expand escapes in the subject */
! 532: if (*p == '%' && *(p+1) != '%') {
! 533: switch (*(++p)) {
! 534: case 'h':
! 535: (void) fputs(user_host, mail);
! 536: break;
! 537: case 'u':
! 538: (void) fputs(user_name, mail);
! 539: break;
! 540: default:
! 541: p--;
! 542: break;
! 543: }
! 544: } else
! 545: (void) fputc(*p, mail);
! 546: }
! 547:
! 548: #ifdef HAVE_NL_LANGINFO
! 549: if (strcmp(def_sudoers_locale, "C") != 0)
! 550: (void) fprintf(mail, "\nContent-Type: text/plain; charset=\"%s\"\nContent-Transfer-Encoding: 8bit", nl_langinfo(CODESET));
! 551: #endif /* HAVE_NL_LANGINFO */
! 552:
! 553: (void) fprintf(mail, "\n\n%s : %s : %s : ", user_host,
! 554: get_timestr(time(NULL), def_log_year), user_name);
! 555: va_start(ap, fmt);
! 556: (void) vfprintf(mail, fmt, ap);
! 557: va_end(ap);
! 558: fputs("\n\n", mail);
! 559:
! 560: fclose(mail);
! 561: do {
! 562: rv = waitpid(pid, &status, 0);
! 563: } while (rv == -1 && errno == EINTR);
! 564: _exit(0);
! 565: }
! 566:
! 567: /*
! 568: * Determine whether we should send mail based on "status" and defaults options.
! 569: */
! 570: static int
! 571: should_mail(int status)
! 572: {
! 573:
! 574: return def_mail_always || ISSET(status, VALIDATE_ERROR) ||
! 575: (def_mail_no_user && ISSET(status, FLAG_NO_USER)) ||
! 576: (def_mail_no_host && ISSET(status, FLAG_NO_HOST)) ||
! 577: (def_mail_no_perms && !ISSET(status, VALIDATE_OK));
! 578: }
! 579:
! 580: #define LL_TTY_STR "TTY="
! 581: #define LL_CWD_STR "PWD=" /* XXX - should be CWD= */
! 582: #define LL_USER_STR "USER="
! 583: #define LL_GROUP_STR "GROUP="
! 584: #define LL_ENV_STR "ENV="
! 585: #define LL_CMND_STR "COMMAND="
! 586: #define LL_TSID_STR "TSID="
! 587:
! 588: #define IS_SESSID(s) ( \
! 589: isalnum((unsigned char)(s)[0]) && isalnum((unsigned char)(s)[1]) && \
! 590: (s)[2] == '/' && \
! 591: isalnum((unsigned char)(s)[3]) && isalnum((unsigned char)(s)[4]) && \
! 592: (s)[5] == '/' && \
! 593: isalnum((unsigned char)(s)[6]) && isalnum((unsigned char)(s)[7]) && \
! 594: (s)[8] == '\0')
! 595:
! 596: /*
! 597: * Allocate and fill in a new logline.
! 598: */
! 599: static char *
! 600: new_logline(const char *message, int serrno)
! 601: {
! 602: size_t len = 0;
! 603: char *errstr = NULL;
! 604: char *evstr = NULL;
! 605: char *line, sessid[7], *tsid = NULL;
! 606:
! 607: /* A TSID may be a sudoers-style session ID or a free-form string. */
! 608: if (sudo_user.iolog_file != NULL) {
! 609: if (IS_SESSID(sudo_user.iolog_file)) {
! 610: sessid[0] = sudo_user.iolog_file[0];
! 611: sessid[1] = sudo_user.iolog_file[1];
! 612: sessid[2] = sudo_user.iolog_file[3];
! 613: sessid[3] = sudo_user.iolog_file[4];
! 614: sessid[4] = sudo_user.iolog_file[6];
! 615: sessid[5] = sudo_user.iolog_file[7];
! 616: sessid[6] = '\0';
! 617: tsid = sessid;
! 618: } else {
! 619: tsid = sudo_user.iolog_file;
! 620: }
! 621: }
! 622:
! 623: /*
! 624: * Compute line length
! 625: */
! 626: if (message != NULL)
! 627: len += strlen(message) + 3;
! 628: if (serrno) {
! 629: errstr = strerror(serrno);
! 630: len += strlen(errstr) + 3;
! 631: }
! 632: len += sizeof(LL_TTY_STR) + 2 + strlen(user_tty);
! 633: len += sizeof(LL_CWD_STR) + 2 + strlen(user_cwd);
! 634: if (runas_pw != NULL)
! 635: len += sizeof(LL_USER_STR) + 2 + strlen(runas_pw->pw_name);
! 636: if (runas_gr != NULL)
! 637: len += sizeof(LL_GROUP_STR) + 2 + strlen(runas_gr->gr_name);
! 638: if (tsid != NULL)
! 639: len += sizeof(LL_TSID_STR) + 2 + strlen(tsid);
! 640: if (sudo_user.env_vars != NULL) {
! 641: size_t evlen = 0;
! 642: char * const *ep;
! 643:
! 644: for (ep = sudo_user.env_vars; *ep != NULL; ep++)
! 645: evlen += strlen(*ep) + 1;
! 646: evstr = emalloc(evlen);
! 647: evstr[0] = '\0';
! 648: for (ep = sudo_user.env_vars; *ep != NULL; ep++) {
! 649: strlcat(evstr, *ep, evlen);
! 650: strlcat(evstr, " ", evlen); /* NOTE: last one will fail */
! 651: }
! 652: len += sizeof(LL_ENV_STR) + 2 + evlen;
! 653: }
! 654: if (user_cmnd != NULL) {
! 655: /* Note: we log "sudo -l command arg ..." as "list command arg ..." */
! 656: len += sizeof(LL_CMND_STR) - 1 + strlen(user_cmnd);
! 657: if (ISSET(sudo_mode, MODE_CHECK))
! 658: len += sizeof("list ") - 1;
! 659: if (user_args != NULL)
! 660: len += strlen(user_args) + 1;
! 661: }
! 662:
! 663: /*
! 664: * Allocate and build up the line.
! 665: */
! 666: line = emalloc(++len);
! 667: line[0] = '\0';
! 668:
! 669: if (message != NULL) {
! 670: if (strlcat(line, message, len) >= len ||
! 671: strlcat(line, errstr ? " : " : " ; ", len) >= len)
! 672: goto toobig;
! 673: }
! 674: if (serrno) {
! 675: if (strlcat(line, errstr, len) >= len ||
! 676: strlcat(line, " ; ", len) >= len)
! 677: goto toobig;
! 678: }
! 679: if (strlcat(line, LL_TTY_STR, len) >= len ||
! 680: strlcat(line, user_tty, len) >= len ||
! 681: strlcat(line, " ; ", len) >= len)
! 682: goto toobig;
! 683: if (strlcat(line, LL_CWD_STR, len) >= len ||
! 684: strlcat(line, user_cwd, len) >= len ||
! 685: strlcat(line, " ; ", len) >= len)
! 686: goto toobig;
! 687: if (runas_pw != NULL) {
! 688: if (strlcat(line, LL_USER_STR, len) >= len ||
! 689: strlcat(line, runas_pw->pw_name, len) >= len ||
! 690: strlcat(line, " ; ", len) >= len)
! 691: goto toobig;
! 692: }
! 693: if (runas_gr != NULL) {
! 694: if (strlcat(line, LL_GROUP_STR, len) >= len ||
! 695: strlcat(line, runas_gr->gr_name, len) >= len ||
! 696: strlcat(line, " ; ", len) >= len)
! 697: goto toobig;
! 698: }
! 699: if (tsid != NULL) {
! 700: if (strlcat(line, LL_TSID_STR, len) >= len ||
! 701: strlcat(line, tsid, len) >= len ||
! 702: strlcat(line, " ; ", len) >= len)
! 703: goto toobig;
! 704: }
! 705: if (evstr != NULL) {
! 706: if (strlcat(line, LL_ENV_STR, len) >= len ||
! 707: strlcat(line, evstr, len) >= len ||
! 708: strlcat(line, " ; ", len) >= len)
! 709: goto toobig;
! 710: efree(evstr);
! 711: }
! 712: if (user_cmnd != NULL) {
! 713: if (strlcat(line, LL_CMND_STR, len) >= len)
! 714: goto toobig;
! 715: if (ISSET(sudo_mode, MODE_CHECK) && strlcat(line, "list ", len) >= len)
! 716: goto toobig;
! 717: if (strlcat(line, user_cmnd, len) >= len)
! 718: goto toobig;
! 719: if (user_args != NULL) {
! 720: if (strlcat(line, " ", len) >= len ||
! 721: strlcat(line, user_args, len) >= len)
! 722: goto toobig;
! 723: }
! 724: }
! 725:
! 726: return line;
! 727: toobig:
! 728: errorx(1, _("internal error: insufficient space for log line"));
! 729: }
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