Annotation of src/usr.bin/sudo/sudo.c, Revision 1.33
1.1 millert 1: /*
1.27 millert 2: * Copyright (c) 1993-1996,1998-2007 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 3: *
1.23 millert 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.
1.1 millert 7: *
1.23 millert 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.
1.1 millert 15: *
1.20 millert 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: *
1.1 millert 20: * For a brief history of sudo, please see the HISTORY file included
21: * with this distribution.
22: */
23:
1.19 millert 24: #define _SUDO_MAIN
1.1 millert 25:
1.23 millert 26: #ifdef __TANDEM
27: # include <floss.h>
28: #endif
29:
1.27 millert 30: #include <config.h>
1.1 millert 31:
1.11 millert 32: #include <sys/types.h>
33: #include <sys/stat.h>
34: #include <sys/param.h>
35: #include <sys/socket.h>
36: #ifdef HAVE_SETRLIMIT
37: # include <sys/time.h>
38: # include <sys/resource.h>
39: #endif
1.1 millert 40: #include <stdio.h>
41: #ifdef STDC_HEADERS
1.11 millert 42: # include <stdlib.h>
43: # include <stddef.h>
44: #else
45: # ifdef HAVE_STDLIB_H
46: # include <stdlib.h>
47: # endif
1.1 millert 48: #endif /* STDC_HEADERS */
1.11 millert 49: #ifdef HAVE_STRING_H
50: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
51: # include <memory.h>
52: # endif
53: # include <string.h>
54: #else
55: # ifdef HAVE_STRINGS_H
56: # include <strings.h>
57: # endif
58: #endif /* HAVE_STRING_H */
1.1 millert 59: #ifdef HAVE_UNISTD_H
1.11 millert 60: # include <unistd.h>
1.1 millert 61: #endif /* HAVE_UNISTD_H */
1.19 millert 62: #ifdef HAVE_ERR_H
63: # include <err.h>
64: #else
65: # include "emul/err.h"
66: #endif /* HAVE_ERR_H */
1.1 millert 67: #include <pwd.h>
68: #include <errno.h>
69: #include <fcntl.h>
70: #include <signal.h>
71: #include <grp.h>
1.27 millert 72: #if TIME_WITH_SYS_TIME
73: # include <time.h>
74: #endif
75: #ifdef HAVE_SETLOCALE
76: # include <locale.h>
77: #endif
1.1 millert 78: #include <netinet/in.h>
79: #include <netdb.h>
80: #if defined(HAVE_GETPRPWNAM) && defined(HAVE_SET_AUTH_PARAMETERS)
81: # ifdef __hpux
82: # undef MAXINT
83: # include <hpsecurity.h>
84: # else
85: # include <sys/security.h>
86: # endif /* __hpux */
87: # include <prot.h>
88: #endif /* HAVE_GETPRPWNAM && HAVE_SET_AUTH_PARAMETERS */
1.8 millert 89: #ifdef HAVE_LOGIN_CAP_H
1.4 millert 90: # include <login_cap.h>
91: # ifndef LOGIN_DEFROOTCLASS
92: # define LOGIN_DEFROOTCLASS "daemon"
93: # endif
94: #endif
1.27 millert 95: #ifdef HAVE_PROJECT_H
96: # include <project.h>
97: # include <sys/task.h>
98: #endif
1.33 ! millert 99: #ifdef HAVE_SELINUX
! 100: # include <selinux/selinux.h>
! 101: #endif
1.1 millert 102:
103: #include "sudo.h"
104: #include "interfaces.h"
105: #include "version.h"
106:
107: #ifndef lint
1.33 ! millert 108: __unused __unused static const char rcsid[] = "$Sudo: sudo.c,v 1.369.2.43 2008/07/02 10:28:43 millert Exp $";
1.1 millert 109: #endif /* lint */
110:
111: /*
112: * Prototypes
113: */
1.27 millert 114: static int init_vars __P((int, char **));
1.19 millert 115: static int parse_args __P((int, char **));
1.11 millert 116: static void check_sudoers __P((void));
117: static void initial_setup __P((void));
118: static void set_loginclass __P((struct passwd *));
1.27 millert 119: static void set_project __P((struct passwd *));
120: static void usage __P((int))
121: __attribute__((__noreturn__));
122: static void usage_excl __P((int))
123: __attribute__((__noreturn__));
1.1 millert 124: static void usage_excl __P((int));
1.6 millert 125: static struct passwd *get_authpw __P((void));
1.27 millert 126: extern int sudo_edit __P((int, char **, char **));
1.11 millert 127: extern void list_matches __P((void));
1.23 millert 128: extern char **rebuild_env __P((char **, int, int));
1.27 millert 129: extern void validate_env_vars __P((struct list_member *));
130: extern char **insert_env_vars __P((char **, struct list_member *));
1.11 millert 131: extern struct passwd *sudo_getpwnam __P((const char *));
1.1 millert 132: extern struct passwd *sudo_getpwuid __P((uid_t));
1.23 millert 133: extern struct passwd *sudo_pwdup __P((const struct passwd *));
1.1 millert 134:
135: /*
136: * Globals
137: */
1.19 millert 138: int Argc, NewArgc;
139: char **Argv, **NewArgv;
1.23 millert 140: char *prev_user;
1.1 millert 141: struct sudo_user sudo_user;
1.6 millert 142: struct passwd *auth_pw;
1.19 millert 143: FILE *sudoers_fp;
1.1 millert 144: struct interface *interfaces;
145: int num_interfaces;
1.4 millert 146: int tgetpass_flags;
1.17 millert 147: uid_t timestamp_uid;
1.1 millert 148: extern int errorlineno;
1.4 millert 149: #if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
150: static struct rlimit corelimit;
1.20 millert 151: #endif /* RLIMIT_CORE && !SUDO_DEVEL */
1.8 millert 152: #ifdef HAVE_LOGIN_CAP_H
153: login_cap_t *lc;
154: #endif /* HAVE_LOGIN_CAP_H */
155: #ifdef HAVE_BSD_AUTH_H
156: char *login_style;
157: #endif /* HAVE_BSD_AUTH_H */
1.33 ! millert 158: sigaction_t saved_sa_int, saved_sa_quit, saved_sa_tstp;
1.1 millert 159:
160:
161: int
1.11 millert 162: main(argc, argv, envp)
1.1 millert 163: int argc;
164: char **argv;
1.11 millert 165: char **envp;
1.1 millert 166: {
167: int validated;
168: int fd;
169: int cmnd_status;
170: int sudo_mode;
1.11 millert 171: int pwflag;
1.23 millert 172: sigaction_t sa;
1.11 millert 173: extern int printmatches;
1.1 millert 174: extern char **environ;
175:
1.27 millert 176: #ifdef HAVE_SETLOCALE
177: setlocale(LC_ALL, "");
178: #endif
179:
1.19 millert 180: Argv = argv;
1.23 millert 181: if ((Argc = argc) < 1)
182: usage(1);
1.19 millert 183:
1.1 millert 184: /* Must be done as the first thing... */
185: #if defined(HAVE_GETPRPWNAM) && defined(HAVE_SET_AUTH_PARAMETERS)
1.19 millert 186: (void) set_auth_parameters(Argc, Argv);
1.1 millert 187: # ifdef HAVE_INITPRIVS
188: initprivs();
189: # endif
190: #endif /* HAVE_GETPRPWNAM && HAVE_SET_AUTH_PARAMETERS */
191:
1.19 millert 192: if (geteuid() != 0)
193: errx(1, "must be setuid root");
1.1 millert 194:
195: /*
1.17 millert 196: * Signal setup:
197: * Ignore keyboard-generated signals so the user cannot interrupt
198: * us at some point and avoid the logging.
199: * Install handler to wait for children when they exit.
1.1 millert 200: */
1.11 millert 201: sigemptyset(&sa.sa_mask);
202: sa.sa_flags = SA_RESTART;
203: sa.sa_handler = SIG_IGN;
1.17 millert 204: (void) sigaction(SIGINT, &sa, &saved_sa_int);
205: (void) sigaction(SIGQUIT, &sa, &saved_sa_quit);
206: (void) sigaction(SIGTSTP, &sa, &saved_sa_tstp);
1.1 millert 207:
208: /*
1.27 millert 209: * Turn off core dumps and close open files.
1.1 millert 210: */
211: initial_setup();
1.11 millert 212: setpwent();
1.1 millert 213:
214: /* Parse our arguments. */
1.19 millert 215: sudo_mode = parse_args(Argc, Argv);
1.1 millert 216:
217: /* Setup defaults data structures. */
218: init_defaults();
219:
1.11 millert 220: /* Load the list of local ip addresses and netmasks. */
221: load_interfaces();
222:
223: pwflag = 0;
1.23 millert 224: if (ISSET(sudo_mode, MODE_SHELL))
1.1 millert 225: user_cmnd = "shell";
1.23 millert 226: else if (ISSET(sudo_mode, MODE_EDIT))
227: user_cmnd = "sudoedit";
1.1 millert 228: else
229: switch (sudo_mode) {
230: case MODE_VERSION:
231: (void) printf("Sudo version %s\n", version);
232: if (getuid() == 0) {
233: putchar('\n');
1.27 millert 234: (void) printf("Sudoers path: %s\n", _PATH_SUDOERS);
1.1 millert 235: dump_auth_methods();
236: dump_defaults();
1.11 millert 237: dump_interfaces();
1.1 millert 238: }
239: exit(0);
240: break;
241: case MODE_HELP:
242: usage(0);
243: break;
244: case MODE_VALIDATE:
245: user_cmnd = "validate";
1.23 millert 246: pwflag = I_VERIFYPW;
1.1 millert 247: break;
248: case MODE_KILL:
249: case MODE_INVALIDATE:
250: user_cmnd = "kill";
1.11 millert 251: pwflag = -1;
1.1 millert 252: break;
253: case MODE_LISTDEFS:
254: list_options();
255: exit(0);
256: break;
257: case MODE_LIST:
258: user_cmnd = "list";
1.23 millert 259: pwflag = I_LISTPW;
1.1 millert 260: printmatches = 1;
261: break;
262: }
263:
264: /* Must have a command to run... */
265: if (user_cmnd == NULL && NewArgc == 0)
266: usage(1);
267:
1.27 millert 268: cmnd_status = init_vars(sudo_mode, environ);
1.1 millert 269:
1.23 millert 270: #ifdef HAVE_LDAP
271: validated = sudo_ldap_check(pwflag);
272:
273: /* Skip reading /etc/sudoers if LDAP told us to */
1.33 ! millert 274: if (!def_ignore_local_sudoers) {
! 275: int v;
! 276:
1.23 millert 277: check_sudoers(); /* check mode/owner on _PATH_SUDOERS */
278:
1.33 ! millert 279: /* Local sudoers file overrides LDAP if we have a match. */
! 280: v = sudoers_lookup(pwflag);
! 281: if (validated == VALIDATE_ERROR || ISSET(v, VALIDATE_OK))
! 282: validated = v;
1.23 millert 283: }
1.33 ! millert 284: #else
! 285: check_sudoers(); /* check mode/owner on _PATH_SUDOERS */
! 286:
! 287: /* Validate the user but don't search for pseudo-commands. */
! 288: validated = sudoers_lookup(pwflag);
1.23 millert 289: #endif
1.26 millert 290: if (safe_cmnd == NULL)
1.27 millert 291: safe_cmnd = estrdup(user_cmnd);
1.1 millert 292:
1.11 millert 293: /*
1.17 millert 294: * Look up the timestamp dir owner if one is specified.
295: */
1.23 millert 296: if (def_timestampowner) {
1.17 millert 297: struct passwd *pw;
298:
1.23 millert 299: if (*def_timestampowner == '#')
300: pw = getpwuid(atoi(def_timestampowner + 1));
1.17 millert 301: else
1.23 millert 302: pw = getpwnam(def_timestampowner);
1.17 millert 303: if (!pw)
304: log_error(0, "timestamp owner (%s): No such user",
1.23 millert 305: def_timestampowner);
1.17 millert 306: timestamp_uid = pw->pw_uid;
307: }
308:
1.2 millert 309: /* This goes after the sudoers parse since we honor sudoers options. */
1.1 millert 310: if (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE) {
311: remove_timestamp((sudo_mode == MODE_KILL));
312: exit(0);
313: }
314:
1.23 millert 315: if (ISSET(validated, VALIDATE_ERROR))
1.1 millert 316: log_error(0, "parse error in %s near line %d", _PATH_SUDOERS,
317: errorlineno);
318:
319: /* Is root even allowed to run sudo? */
1.23 millert 320: if (user_uid == 0 && !def_root_sudo) {
1.17 millert 321: (void) fprintf(stderr,
322: "Sorry, %s has been configured to not allow root to run it.\n",
1.19 millert 323: getprogname());
1.1 millert 324: exit(1);
325: }
326:
1.11 millert 327: /* If given the -P option, set the "preserve_groups" flag. */
1.23 millert 328: if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
329: def_preserve_groups = TRUE;
1.11 millert 330:
1.3 millert 331: /* If no command line args and "set_home" is not set, error out. */
1.23 millert 332: if (ISSET(sudo_mode, MODE_IMPLIED_SHELL) && !def_shell_noargs)
1.3 millert 333: usage(1);
334:
1.1 millert 335: /* Bail if a tty is required and we don't have one. */
1.23 millert 336: if (def_requiretty) {
1.1 millert 337: if ((fd = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1)
338: log_error(NO_MAIL, "sorry, you must have a tty to run sudo");
339: else
340: (void) close(fd);
341: }
342:
1.27 millert 343: /* User may have overriden environment resetting via the -E flag. */
344: if (ISSET(sudo_mode, MODE_PRESERVE_ENV) && ISSET(validated, FLAG_SETENV))
345: def_env_reset = FALSE;
346:
347: /* Build a new environment that avoids any nasty bits. */
348: environ = rebuild_env(environ, sudo_mode, ISSET(validated, FLAG_NOEXEC));
349:
1.6 millert 350: /* Fill in passwd struct based on user we are authenticating as. */
351: auth_pw = get_authpw();
1.4 millert 352:
1.23 millert 353: /* Require a password if sudoers says so. */
354: if (!ISSET(validated, FLAG_NOPASS))
1.27 millert 355: check_user(validated);
1.23 millert 356:
357: /* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
358: if (user_uid == 0 && prev_user != NULL && strcmp(prev_user, "root") != 0) {
359: struct passwd *pw;
360:
361: if ((pw = sudo_getpwnam(prev_user)) != NULL) {
1.27 millert 362: efree(sudo_user.pw);
1.23 millert 363: sudo_user.pw = pw;
364: }
365: }
1.1 millert 366:
1.23 millert 367: if (ISSET(validated, VALIDATE_OK)) {
1.1 millert 368: /* Finally tell the user if the command did not exist. */
369: if (cmnd_status == NOT_FOUND_DOT) {
1.19 millert 370: warnx("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.", user_cmnd, user_cmnd, user_cmnd);
1.1 millert 371: exit(1);
372: } else if (cmnd_status == NOT_FOUND) {
1.19 millert 373: warnx("%s: command not found", user_cmnd);
1.1 millert 374: exit(1);
375: }
376:
1.27 millert 377: /* If user specified env vars make sure sudoers allows it. */
378: if (ISSET(sudo_mode, MODE_RUN) && !ISSET(validated, FLAG_SETENV)) {
379: if (ISSET(sudo_mode, MODE_PRESERVE_ENV))
380: log_error(NO_MAIL,
381: "sorry, you are not allowed to preserve the environment");
382: else
383: validate_env_vars(sudo_user.env_vars);
384: }
385:
1.1 millert 386: log_auth(validated, 1);
387: if (sudo_mode == MODE_VALIDATE)
388: exit(0);
389: else if (sudo_mode == MODE_LIST) {
390: list_matches();
1.23 millert 391: #ifdef HAVE_LDAP
392: sudo_ldap_list_matches();
393: #endif
1.1 millert 394: exit(0);
395: }
396:
397: /* Override user's umask if configured to do so. */
1.23 millert 398: if (def_umask != 0777)
399: (void) umask(def_umask);
1.1 millert 400:
1.4 millert 401: /* Restore coredumpsize resource limit. */
402: #if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
403: (void) setrlimit(RLIMIT_CORE, &corelimit);
1.20 millert 404: #endif /* RLIMIT_CORE && !SUDO_DEVEL */
1.4 millert 405:
1.23 millert 406: /* Become specified user or root if executing a command. */
407: if (ISSET(sudo_mode, MODE_RUN))
408: set_perms(PERM_FULL_RUNAS);
1.16 millert 409:
410: /* Close the password and group files */
411: endpwent();
412: endgrent();
1.12 millert 413:
1.23 millert 414: if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
415: char *p;
416:
417: /* Convert /bin/sh -> -sh so shell knows it is a login shell */
418: if ((p = strrchr(NewArgv[0], '/')) == NULL)
419: p = NewArgv[0];
420: *p = '-';
421: NewArgv[0] = p;
422:
423: /* Change to target user's homedir. */
424: if (chdir(runas_pw->pw_dir) == -1)
425: warn("unable to change directory to %s", runas_pw->pw_dir);
426: }
427:
428: if (ISSET(sudo_mode, MODE_EDIT))
1.27 millert 429: exit(sudo_edit(NewArgc, NewArgv, envp));
430:
431: /* Insert user-specified environment variables. */
432: environ = insert_env_vars(environ, sudo_user.env_vars);
1.23 millert 433:
1.17 millert 434: /* Restore signal handlers before we exec. */
435: (void) sigaction(SIGINT, &saved_sa_int, NULL);
436: (void) sigaction(SIGQUIT, &saved_sa_quit, NULL);
437: (void) sigaction(SIGTSTP, &saved_sa_tstp, NULL);
438:
1.1 millert 439: #ifndef PROFILING
1.23 millert 440: if (ISSET(sudo_mode, MODE_BACKGROUND) && fork() > 0)
1.1 millert 441: exit(0);
1.33 ! millert 442: else {
! 443: #ifdef HAVE_SELINUX
! 444: if (is_selinux_enabled() > 0 && user_role != NULL)
! 445: selinux_exec(user_role, user_type, NewArgv, environ,
! 446: ISSET(sudo_mode, MODE_LOGIN_SHELL));
! 447: #endif
1.27 millert 448: execve(safe_cmnd, NewArgv, environ);
1.33 ! millert 449: }
1.1 millert 450: #else
451: exit(0);
452: #endif /* PROFILING */
453: /*
454: * If we got here then the exec() failed...
455: */
1.27 millert 456: if (errno == ENOEXEC) {
457: NewArgv--; /* at least one extra slot... */
458: NewArgv[0] = "sh";
459: NewArgv[1] = safe_cmnd;
460: execve(_PATH_BSHELL, NewArgv, environ);
461: }
1.19 millert 462: warn("unable to execute %s", safe_cmnd);
1.11 millert 463: exit(127);
1.23 millert 464: } else if (ISSET(validated, FLAG_NO_USER) || (validated & FLAG_NO_HOST)) {
1.1 millert 465: log_auth(validated, 1);
466: exit(1);
1.23 millert 467: } else if (ISSET(validated, VALIDATE_NOT_OK)) {
468: if (def_path_info) {
1.1 millert 469: /*
470: * We'd like to not leak path info at all here, but that can
471: * *really* confuse the users. To really close the leak we'd
472: * have to say "not allowed to run foo" even when the problem
473: * is just "no foo in path" since the user can trivially set
474: * their path to just contain a single dir.
475: */
476: log_auth(validated,
477: !(cmnd_status == NOT_FOUND_DOT || cmnd_status == NOT_FOUND));
478: if (cmnd_status == NOT_FOUND)
1.19 millert 479: warnx("%s: command not found", user_cmnd);
1.1 millert 480: else if (cmnd_status == NOT_FOUND_DOT)
1.19 millert 481: warnx("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.", user_cmnd, user_cmnd, user_cmnd);
1.1 millert 482: } else {
483: /* Just tell the user they are not allowed to run foo. */
484: log_auth(validated, 1);
485: }
486: exit(1);
487: } else {
488: /* should never get here */
489: log_auth(validated, 1);
490: exit(1);
491: }
492: exit(0); /* not reached */
493: }
494:
495: /*
496: * Initialize timezone, set umask, fill in ``sudo_user'' struct and
497: * load the ``interfaces'' array.
498: */
499: static int
1.27 millert 500: init_vars(sudo_mode, envp)
1.1 millert 501: int sudo_mode;
1.27 millert 502: char **envp;
1.1 millert 503: {
1.27 millert 504: char *p, **ep, thost[MAXHOSTNAMELEN];
1.11 millert 505: int nohostname, rval;
1.1 millert 506:
507: /* Sanity check command from user. */
1.23 millert 508: if (user_cmnd == NULL && strlen(NewArgv[0]) >= PATH_MAX)
1.19 millert 509: errx(1, "%s: File name too long", NewArgv[0]);
1.1 millert 510:
511: #ifdef HAVE_TZSET
512: (void) tzset(); /* set the timezone if applicable */
513: #endif /* HAVE_TZSET */
514:
515: /* Default value for cmnd and cwd, overridden later. */
516: if (user_cmnd == NULL)
517: user_cmnd = NewArgv[0];
1.17 millert 518: (void) strlcpy(user_cwd, "unknown", sizeof(user_cwd));
1.1 millert 519:
520: /*
521: * We avoid gethostbyname() if possible since we don't want
522: * sudo to block if DNS or NIS is hosed.
523: * "host" is the (possibly fully-qualified) hostname and
524: * "shost" is the unqualified form of the hostname.
525: */
1.11 millert 526: nohostname = gethostname(thost, sizeof(thost));
527: if (nohostname)
528: user_host = user_shost = "localhost";
529: else {
1.1 millert 530: user_host = estrdup(thost);
1.23 millert 531: if (def_fqdn) {
1.11 millert 532: /* Defer call to set_fqdn() until log_error() is safe. */
533: user_shost = user_host;
1.1 millert 534: } else {
1.11 millert 535: if ((p = strchr(user_host, '.'))) {
536: *p = '\0';
537: user_shost = estrdup(user_host);
538: *p = '.';
539: } else {
540: user_shost = user_host;
541: }
1.1 millert 542: }
543: }
544:
545: if ((p = ttyname(STDIN_FILENO)) || (p = ttyname(STDOUT_FILENO))) {
1.30 millert 546: user_tty = user_ttypath = estrdup(p);
547: if (strncmp(user_tty, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
548: user_tty += sizeof(_PATH_DEV) - 1;
1.1 millert 549: } else
550: user_tty = "unknown";
551:
1.27 millert 552: for (ep = envp; *ep; ep++) {
553: switch (**ep) {
554: case 'P':
555: if (strncmp("PATH=", *ep, 5) == 0)
556: user_path = *ep + 5;
557: break;
558: case 'S':
559: if (strncmp("SHELL=", *ep, 6) == 0)
560: user_shell = *ep + 6;
561: else if (!user_prompt && strncmp("SUDO_PROMPT=", *ep, 12) == 0)
562: user_prompt = *ep + 12;
563: else if (strncmp("SUDO_USER=", *ep, 10) == 0)
564: prev_user = *ep + 10;
565: break;
566:
567: }
568: }
569:
1.1 millert 570: /*
571: * Get a local copy of the user's struct passwd with the shadow password
572: * if necessary. It is assumed that euid is 0 at this point so we
573: * can read the shadow passwd file if necessary.
574: */
575: if ((sudo_user.pw = sudo_getpwuid(getuid())) == NULL) {
576: /* Need to make a fake struct passwd for logging to work. */
577: struct passwd pw;
578: char pw_name[MAX_UID_T_LEN + 1];
579:
580: pw.pw_uid = getuid();
1.17 millert 581: (void) snprintf(pw_name, sizeof(pw_name), "%lu",
582: (unsigned long) pw.pw_uid);
1.1 millert 583: pw.pw_name = pw_name;
584: sudo_user.pw = &pw;
585:
1.21 millert 586: /*
587: * If we are in -k/-K mode, just spew to stderr. It is not unusual for
588: * users to place "sudo -k" in a .logout file which can cause sudo to
589: * be run during reboot after the YP/NIS/NIS+/LDAP/etc daemon has died.
590: */
591: if (sudo_mode & (MODE_INVALIDATE|MODE_KILL))
592: errx(1, "uid %s does not exist in the passwd file!", pw_name);
593: log_error(0, "uid %s does not exist in the passwd file!", pw_name);
1.1 millert 594: }
1.15 millert 595: if (user_shell == NULL || *user_shell == '\0')
596: user_shell = sudo_user.pw->pw_shell;
1.1 millert 597:
598: /* It is now safe to use log_error() and set_perms() */
599:
1.27 millert 600: #ifdef HAVE_GETGROUPS
601: if ((user_ngroups = getgroups(0, NULL)) > 0) {
1.31 millert 602: user_groups = emalloc2(user_ngroups, sizeof(GETGROUPS_T));
1.27 millert 603: if (getgroups(user_ngroups, user_groups) < 0)
604: log_error(USE_ERRNO|MSG_ONLY, "can't get group vector");
605: } else
606: user_ngroups = 0;
607: #endif
608:
1.23 millert 609: if (def_fqdn)
610: set_fqdn(); /* may call log_error() */
1.11 millert 611:
612: if (nohostname)
613: log_error(USE_ERRNO|MSG_ONLY, "can't get hostname");
614:
1.23 millert 615: set_runaspw(*user_runas); /* may call log_error() */
1.33 ! millert 616: if (*user_runas[0] == '#') {
! 617: if (runas_pw->pw_name != *user_runas && runas_pw->pw_name[0])
! 618: *user_runas = estrdup(runas_pw->pw_name);
! 619: }
1.23 millert 620:
1.11 millert 621: /*
1.1 millert 622: * Get current working directory. Try as user, fall back to root.
623: */
1.17 millert 624: set_perms(PERM_USER);
1.1 millert 625: if (!getcwd(user_cwd, sizeof(user_cwd))) {
1.17 millert 626: set_perms(PERM_ROOT);
1.1 millert 627: if (!getcwd(user_cwd, sizeof(user_cwd))) {
1.19 millert 628: warnx("cannot get working directory");
1.17 millert 629: (void) strlcpy(user_cwd, "unknown", sizeof(user_cwd));
1.1 millert 630: }
631: } else
1.17 millert 632: set_perms(PERM_ROOT);
1.1 millert 633:
634: /*
1.23 millert 635: * If we were given the '-e', '-i' or '-s' options we need to redo
1.1 millert 636: * NewArgv and NewArgc.
637: */
1.23 millert 638: if ((sudo_mode & (MODE_SHELL | MODE_EDIT))) {
1.1 millert 639: char **dst, **src = NewArgv;
640:
1.27 millert 641: /* Allocate an extra slot for execve() failure (ENOEXEC). */
642: NewArgv = (char **) emalloc2((++NewArgc + 2), sizeof(char *));
643: NewArgv++;
1.23 millert 644: if (ISSET(sudo_mode, MODE_EDIT))
645: NewArgv[0] = "sudoedit";
646: else if (ISSET(sudo_mode, MODE_LOGIN_SHELL))
647: NewArgv[0] = runas_pw->pw_shell;
648: else if (user_shell && *user_shell)
1.1 millert 649: NewArgv[0] = user_shell;
1.23 millert 650: else
1.19 millert 651: errx(1, "unable to determine shell");
1.1 millert 652:
1.19 millert 653: /* copy the args from NewArgv */
1.1 millert 654: for (dst = NewArgv + 1; (*dst = *src) != NULL; ++src, ++dst)
1.27 millert 655: continue;
1.1 millert 656: }
657:
1.8 millert 658: /* Set login class if applicable. */
659: set_loginclass(sudo_user.pw);
660:
1.27 millert 661: /* Set project if applicable. */
662: set_project(runas_pw);
663:
1.1 millert 664: /* Resolve the path and return. */
1.23 millert 665: rval = FOUND;
666: user_stat = emalloc(sizeof(struct stat));
667: if (sudo_mode & (MODE_RUN | MODE_EDIT)) {
668: if (ISSET(sudo_mode, MODE_RUN)) {
669: /* XXX - default_runas may be modified during parsing of sudoers */
670: set_perms(PERM_RUNAS);
671: rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
1.17 millert 672: set_perms(PERM_ROOT);
1.23 millert 673: if (rval != FOUND) {
674: /* Failed as root, try as invoking user. */
675: set_perms(PERM_USER);
676: rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
677: set_perms(PERM_ROOT);
678: }
1.11 millert 679: }
680:
681: /* set user_args */
682: if (NewArgc > 1) {
683: char *to, **from;
1.17 millert 684: size_t size, n;
1.11 millert 685:
1.23 millert 686: /* If we didn't realloc NewArgv it is contiguous so just count. */
687: if (!(sudo_mode & (MODE_SHELL | MODE_EDIT))) {
1.11 millert 688: size = (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
689: strlen(NewArgv[NewArgc-1]) + 1;
690: } else {
691: for (size = 0, from = NewArgv + 1; *from; from++)
692: size += strlen(*from) + 1;
693: }
694:
1.23 millert 695: /* Alloc and build up user_args. */
1.17 millert 696: user_args = (char *) emalloc(size);
697: for (to = user_args, from = NewArgv + 1; *from; from++) {
698: n = strlcpy(to, *from, size - (to - user_args));
1.19 millert 699: if (n >= size - (to - user_args))
700: errx(1, "internal error, init_vars() overflow");
1.17 millert 701: to += n;
1.11 millert 702: *to++ = ' ';
703: }
704: *--to = '\0';
705: }
1.23 millert 706: }
707: if ((user_base = strrchr(user_cmnd, '/')) != NULL)
708: user_base++;
709: else
710: user_base = user_cmnd;
1.11 millert 711:
712: return(rval);
1.1 millert 713: }
714:
715: /*
716: * Command line argument parsing, can't use getopt(3).
717: */
718: static int
1.19 millert 719: parse_args(argc, argv)
720: int argc;
721: char **argv;
1.1 millert 722: {
1.17 millert 723: int rval = MODE_RUN; /* what mode is sudo to be run in? */
1.1 millert 724: int excl = 0; /* exclusive arg, no others allowed */
725:
1.19 millert 726: NewArgv = argv + 1;
727: NewArgc = argc - 1;
1.1 millert 728:
1.23 millert 729: /* First, check to see if we were invoked as "sudoedit". */
730: if (strcmp(getprogname(), "sudoedit") == 0) {
731: rval = MODE_EDIT;
732: excl = 'e';
733: } else
734: rval = MODE_RUN;
735:
1.27 millert 736: while (NewArgc > 0) {
737: if (NewArgv[0][0] == '-') {
1.32 millert 738: if (NewArgv[0][1] != '\0' && NewArgv[0][2] != '\0') {
1.27 millert 739: warnx("please use single character options");
1.32 millert 740: usage(1);
741: }
1.27 millert 742:
743: switch (NewArgv[0][1]) {
744: case 'p':
745: /* Must have an associated prompt. */
746: if (NewArgv[1] == NULL)
747: usage(1);
1.1 millert 748:
1.27 millert 749: user_prompt = NewArgv[1];
1.31 millert 750: def_passprompt_override = TRUE;
1.1 millert 751:
1.27 millert 752: NewArgc--;
753: NewArgv++;
754: break;
755: case 'u':
756: /* Must have an associated runas user. */
757: if (NewArgv[1] == NULL)
758: usage(1);
1.1 millert 759:
1.27 millert 760: user_runas = &NewArgv[1];
1.1 millert 761:
1.27 millert 762: NewArgc--;
763: NewArgv++;
764: break;
1.8 millert 765: #ifdef HAVE_BSD_AUTH_H
1.27 millert 766: case 'a':
767: /* Must have an associated authentication style. */
768: if (NewArgv[1] == NULL)
769: usage(1);
1.8 millert 770:
1.27 millert 771: login_style = NewArgv[1];
1.8 millert 772:
1.27 millert 773: NewArgc--;
774: NewArgv++;
775: break;
1.8 millert 776: #endif
777: #ifdef HAVE_LOGIN_CAP_H
1.27 millert 778: case 'c':
779: /* Must have an associated login class. */
780: if (NewArgv[1] == NULL)
781: usage(1);
1.4 millert 782:
1.27 millert 783: login_class = NewArgv[1];
784: def_use_loginclass = TRUE;
1.4 millert 785:
1.27 millert 786: NewArgc--;
787: NewArgv++;
788: break;
1.4 millert 789: #endif
1.27 millert 790: case 'b':
791: SET(rval, MODE_BACKGROUND);
792: break;
793: case 'e':
794: rval = MODE_EDIT;
795: if (excl && excl != 'e')
796: usage_excl(1);
797: excl = 'e';
798: break;
799: case 'v':
800: rval = MODE_VALIDATE;
801: if (excl && excl != 'v')
802: usage_excl(1);
803: excl = 'v';
804: break;
805: case 'i':
806: SET(rval, (MODE_LOGIN_SHELL | MODE_SHELL));
807: def_env_reset = TRUE;
808: if (excl && excl != 'i')
809: usage_excl(1);
810: excl = 'i';
811: break;
812: case 'k':
813: rval = MODE_INVALIDATE;
814: if (excl && excl != 'k')
815: usage_excl(1);
816: excl = 'k';
817: break;
818: case 'K':
819: rval = MODE_KILL;
820: if (excl && excl != 'K')
821: usage_excl(1);
822: excl = 'K';
823: break;
824: case 'L':
825: rval = MODE_LISTDEFS;
826: if (excl && excl != 'L')
827: usage_excl(1);
828: excl = 'L';
829: break;
830: case 'l':
831: rval = MODE_LIST;
832: if (excl && excl != 'l')
833: usage_excl(1);
834: excl = 'l';
835: break;
836: case 'V':
837: rval = MODE_VERSION;
838: if (excl && excl != 'V')
839: usage_excl(1);
840: excl = 'V';
841: break;
842: case 'h':
843: rval = MODE_HELP;
844: if (excl && excl != 'h')
845: usage_excl(1);
846: excl = 'h';
847: break;
848: case 's':
849: SET(rval, MODE_SHELL);
850: if (excl && excl != 's')
851: usage_excl(1);
852: excl = 's';
853: break;
854: case 'H':
855: SET(rval, MODE_RESET_HOME);
856: break;
857: case 'P':
858: SET(rval, MODE_PRESERVE_GROUPS);
859: break;
860: case 'S':
861: SET(tgetpass_flags, TGP_STDIN);
862: break;
863: case 'E':
864: SET(rval, MODE_PRESERVE_ENV);
865: break;
1.33 ! millert 866: #ifdef HAVE_SELINUX
! 867: case 'r':
! 868: /* Must have an associated SELinux role. */
! 869: if (NewArgv[1] == NULL)
! 870: usage(1);
! 871:
! 872: user_role = NewArgv[1];
! 873:
! 874: NewArgc--;
! 875: NewArgv++;
! 876: break;
! 877: case 't':
! 878: /* Must have an associated SELinux type. */
! 879: if (NewArgv[1] == NULL)
! 880: usage(1);
! 881:
! 882: user_type = NewArgv[1];
! 883:
! 884: NewArgc--;
! 885: NewArgv++;
! 886: break;
! 887: #endif
1.27 millert 888: case '-':
889: NewArgc--;
890: NewArgv++;
891: goto args_done;
892: case '\0':
893: warnx("'-' requires an argument");
894: usage(1);
895: default:
896: warnx("illegal option `%s'", NewArgv[0]);
897: usage(1);
898: }
899: } else if (NewArgv[0][0] != '/' && strchr(NewArgv[0], '=') != NULL) {
900: /* Could be an environment variable. */
901: struct list_member *ev;
902: ev = emalloc(sizeof(*ev));
903: ev->value = NewArgv[0];
904: ev->next = sudo_user.env_vars;
905: sudo_user.env_vars = ev;
906: } else {
907: /* Not an arg */
908: break;
1.1 millert 909: }
910: NewArgc--;
911: NewArgv++;
912: }
1.27 millert 913: args_done:
914:
915: if (ISSET(rval, MODE_EDIT) &&
916: (ISSET(rval, MODE_PRESERVE_ENV) || sudo_user.env_vars != NULL)) {
917: if (ISSET(rval, MODE_PRESERVE_ENV))
918: warnx("the `-E' option is not valid in edit mode");
919: if (sudo_user.env_vars != NULL)
920: warnx("you may not specify environment variables in edit mode");
921: usage(1);
922: }
1.33 ! millert 923: if (ISSET(rval, MODE_PRESERVE_ENV) && ISSET(rval, MODE_LOGIN_SHELL)) {
! 924: warnx("you may not specify both the `-i' and `-E' options");
! 925: usage(1);
! 926: }
1.24 millert 927: if (user_runas != NULL && !ISSET(rval, (MODE_EDIT|MODE_RUN))) {
928: if (excl != '\0')
929: warnx("the `-u' and '-%c' options may not be used together", excl);
930: usage(1);
931: }
1.23 millert 932: if ((NewArgc == 0 && (rval & MODE_EDIT)) ||
933: (NewArgc > 0 && !(rval & (MODE_RUN | MODE_EDIT))))
1.1 millert 934: usage(1);
1.27 millert 935: if (NewArgc == 0 && rval == MODE_RUN)
936: SET(rval, (MODE_IMPLIED_SHELL | MODE_SHELL));
1.1 millert 937:
938: return(rval);
939: }
940:
941: /*
942: * Sanity check sudoers mode/owner/type.
943: * Leaves a file pointer to the sudoers file open in ``fp''.
944: */
945: static void
946: check_sudoers()
947: {
948: struct stat statbuf;
949: int rootstat, i;
950:
951: /*
952: * Fix the mode and group on sudoers file from old default.
1.23 millert 953: * Only works if file system is readable/writable by root.
1.1 millert 954: */
1.17 millert 955: if ((rootstat = stat_sudoers(_PATH_SUDOERS, &statbuf)) == 0 &&
1.1 millert 956: SUDOERS_UID == statbuf.st_uid && SUDOERS_MODE != 0400 &&
957: (statbuf.st_mode & 0007777) == 0400) {
958:
959: if (chmod(_PATH_SUDOERS, SUDOERS_MODE) == 0) {
1.19 millert 960: warnx("fixed mode on %s", _PATH_SUDOERS);
1.23 millert 961: SET(statbuf.st_mode, SUDOERS_MODE);
1.1 millert 962: if (statbuf.st_gid != SUDOERS_GID) {
963: if (!chown(_PATH_SUDOERS,(uid_t) -1,SUDOERS_GID)) {
1.19 millert 964: warnx("set group on %s", _PATH_SUDOERS);
1.1 millert 965: statbuf.st_gid = SUDOERS_GID;
1.19 millert 966: } else
967: warn("unable to set group on %s", _PATH_SUDOERS);
1.1 millert 968: }
1.19 millert 969: } else
970: warn("unable to fix mode on %s", _PATH_SUDOERS);
1.1 millert 971: }
972:
973: /*
974: * Sanity checks on sudoers file. Must be done as sudoers
975: * file owner. We already did a stat as root, so use that
976: * data if we can't stat as sudoers file owner.
977: */
1.17 millert 978: set_perms(PERM_SUDOERS);
1.1 millert 979:
1.17 millert 980: if (rootstat != 0 && stat_sudoers(_PATH_SUDOERS, &statbuf) != 0)
1.1 millert 981: log_error(USE_ERRNO, "can't stat %s", _PATH_SUDOERS);
982: else if (!S_ISREG(statbuf.st_mode))
983: log_error(0, "%s is not a regular file", _PATH_SUDOERS);
1.9 millert 984: else if (statbuf.st_size == 0)
985: log_error(0, "%s is zero length", _PATH_SUDOERS);
1.1 millert 986: else if ((statbuf.st_mode & 07777) != SUDOERS_MODE)
987: log_error(0, "%s is mode 0%o, should be 0%o", _PATH_SUDOERS,
1.27 millert 988: (unsigned int) (statbuf.st_mode & 07777),
989: (unsigned int) SUDOERS_MODE);
1.1 millert 990: else if (statbuf.st_uid != SUDOERS_UID)
1.17 millert 991: log_error(0, "%s is owned by uid %lu, should be %lu", _PATH_SUDOERS,
1.25 millert 992: (unsigned long) statbuf.st_uid, (unsigned long) SUDOERS_UID);
1.1 millert 993: else if (statbuf.st_gid != SUDOERS_GID)
1.17 millert 994: log_error(0, "%s is owned by gid %lu, should be %lu", _PATH_SUDOERS,
1.25 millert 995: (unsigned long) statbuf.st_gid, (unsigned long) SUDOERS_GID);
1.1 millert 996: else {
997: /* Solaris sometimes returns EAGAIN so try 10 times */
998: for (i = 0; i < 10 ; i++) {
999: errno = 0;
1000: if ((sudoers_fp = fopen(_PATH_SUDOERS, "r")) == NULL ||
1.28 millert 1001: fgetc(sudoers_fp) == EOF) {
1002: if (sudoers_fp != NULL)
1003: fclose(sudoers_fp);
1.1 millert 1004: sudoers_fp = NULL;
1005: if (errno != EAGAIN && errno != EWOULDBLOCK)
1006: break;
1007: } else
1008: break;
1009: sleep(1);
1010: }
1011: if (sudoers_fp == NULL)
1012: log_error(USE_ERRNO, "can't open %s", _PATH_SUDOERS);
1013: }
1014:
1.17 millert 1015: set_perms(PERM_ROOT); /* change back to root */
1.1 millert 1016: }
1017:
1018: /*
1019: * Close all open files (except std*) and turn off core dumps.
1020: */
1021: static void
1022: initial_setup()
1023: {
1.27 millert 1024: int miss[3], devnull = -1;
1.33 ! millert 1025: #if defined(__linux__) || (defined(RLIMIT_CORE) && !defined(SUDO_DEVEL))
1.1 millert 1026: struct rlimit rl;
1.33 ! millert 1027: #endif
1.1 millert 1028:
1.33 ! millert 1029: #if defined(__linux__)
! 1030: /*
! 1031: * Unlimit the number of processes since Linux's setuid() will
! 1032: * apply resource limits when changing uid and return EAGAIN if
! 1033: * nproc would be violated by the uid switch.
! 1034: */
! 1035: rl.rlim_cur = rl.rlim_max = RLIM_INFINITY;
! 1036: if (setrlimit(RLIMIT_NPROC, &rl)) {
! 1037: if (getrlimit(RLIMIT_NPROC, &rl) == 0) {
! 1038: rl.rlim_cur = rl.rlim_max;
! 1039: (void)setrlimit(RLIMIT_NPROC, &rl);
! 1040: }
! 1041: }
! 1042: #endif /* __linux__ */
! 1043: #if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
1.1 millert 1044: /*
1045: * Turn off core dumps.
1046: */
1.4 millert 1047: (void) getrlimit(RLIMIT_CORE, &corelimit);
1.20 millert 1048: memcpy(&rl, &corelimit, sizeof(struct rlimit));
1049: rl.rlim_cur = 0;
1.1 millert 1050: (void) setrlimit(RLIMIT_CORE, &rl);
1.20 millert 1051: #endif /* RLIMIT_CORE && !SUDO_DEVEL */
1.1 millert 1052:
1.17 millert 1053: /*
1.27 millert 1054: * stdin, stdout and stderr must be open; set them to /dev/null
1055: * if they are closed and close all other fds.
1.17 millert 1056: */
1.27 millert 1057: miss[STDIN_FILENO] = fcntl(STDIN_FILENO, F_GETFL, 0) == -1;
1058: miss[STDOUT_FILENO] = fcntl(STDOUT_FILENO, F_GETFL, 0) == -1;
1059: miss[STDERR_FILENO] = fcntl(STDERR_FILENO, F_GETFL, 0) == -1;
1060: if (miss[STDIN_FILENO] || miss[STDOUT_FILENO] || miss[STDERR_FILENO]) {
1061: if ((devnull = open(_PATH_DEVNULL, O_RDWR, 0644)) != -1) {
1062: if (miss[STDIN_FILENO])
1063: (void) dup2(devnull, STDIN_FILENO);
1064: if (miss[STDOUT_FILENO])
1065: (void) dup2(devnull, STDOUT_FILENO);
1066: if (miss[STDERR_FILENO])
1067: (void) dup2(devnull, STDERR_FILENO);
1068: }
1069: }
1070: closefrom(STDERR_FILENO + 1);
1.1 millert 1071: }
1072:
1.8 millert 1073: #ifdef HAVE_LOGIN_CAP_H
1074: static void
1.4 millert 1075: set_loginclass(pw)
1076: struct passwd *pw;
1077: {
1078: int errflags;
1079:
1080: /*
1081: * Don't make it a fatal error if the user didn't specify the login
1082: * class themselves. We do this because if login.conf gets
1083: * corrupted we want the admin to be able to use sudo to fix it.
1084: */
1085: if (login_class)
1086: errflags = NO_MAIL|MSG_ONLY;
1087: else
1088: errflags = NO_MAIL|MSG_ONLY|NO_EXIT;
1089:
1090: if (login_class && strcmp(login_class, "-") != 0) {
1.19 millert 1091: if (strcmp(*user_runas, "root") != 0 && user_uid != 0)
1092: errx(1, "only root can use -c %s", login_class);
1.4 millert 1093: } else {
1094: login_class = pw->pw_class;
1095: if (!login_class || !*login_class)
1096: login_class =
1097: (pw->pw_uid == 0) ? LOGIN_DEFROOTCLASS : LOGIN_DEFCLASS;
1098: }
1099:
1100: lc = login_getclass(login_class);
1.10 millert 1101: if (!lc || !lc->lc_class || strcmp(lc->lc_class, login_class) != 0) {
1.4 millert 1102: log_error(errflags, "unknown login class: %s", login_class);
1.11 millert 1103: if (!lc)
1104: lc = login_getclass(NULL); /* needed for login_getstyle() later */
1.10 millert 1105: }
1.4 millert 1106: }
1107: #else
1.8 millert 1108: static void
1.4 millert 1109: set_loginclass(pw)
1110: struct passwd *pw;
1111: {
1112: }
1.8 millert 1113: #endif /* HAVE_LOGIN_CAP_H */
1.4 millert 1114:
1.27 millert 1115: #ifdef HAVE_PROJECT_H
1116: static void
1117: set_project(pw)
1118: struct passwd *pw;
1119: {
1120: int errflags = NO_MAIL|MSG_ONLY|NO_EXIT;
1121: int errval;
1122: struct project proj;
1123: struct project *resultp = '\0';
1124: char buf[1024];
1125:
1126: /*
1127: * Collect the default project for the user and settaskid
1128: */
1129: setprojent();
1130: if (resultp = getdefaultproj(pw->pw_name, &proj, buf, sizeof(buf))) {
1131: errval = setproject(resultp->pj_name, pw->pw_name, TASK_NORMAL);
1132: if (errval != 0) {
1133: switch(errval) {
1134: case SETPROJ_ERR_TASK:
1135: if (errno == EAGAIN)
1136: log_error(errflags, "resource control limit has been reached");
1137: else if (errno == ESRCH)
1138: log_error(errflags, "user \"%s\" is not a member of "
1139: "project \"%s\"", pw->pw_name, resultp->pj_name);
1140: else if (errno == EACCES)
1141: log_error(errflags, "the invoking task is final");
1142: else
1143: log_error(errflags, "could not join project \"%s\"",
1144: resultp->pj_name);
1145: break;
1146: case SETPROJ_ERR_POOL:
1147: if (errno == EACCES)
1148: log_error(errflags, "no resource pool accepting "
1149: "default bindings exists for project \"%s\"",
1150: resultp->pj_name);
1151: else if (errno == ESRCH)
1152: log_error(errflags, "specified resource pool does "
1153: "not exist for project \"%s\"", resultp->pj_name);
1154: else
1155: log_error(errflags, "could not bind to default "
1156: "resource pool for project \"%s\"", resultp->pj_name);
1157: break;
1158: default:
1159: if (errval <= 0) {
1160: log_error(errflags, "setproject failed for project \"%s\"",
1161: resultp->pj_name);
1162: } else {
1163: log_error(errflags, "warning, resource control assignment "
1164: "failed for project \"%s\"", resultp->pj_name);
1165: }
1166: }
1167: }
1168: } else {
1169: log_error(errflags, "getdefaultproj() error: %s", strerror(errno));
1170: }
1171: endprojent();
1172: }
1173: #else
1174: static void
1175: set_project(pw)
1176: struct passwd *pw;
1177: {
1178: }
1179: #endif /* HAVE_PROJECT_H */
1180:
1.1 millert 1181: /*
1.2 millert 1182: * Look up the fully qualified domain name and set user_host and user_shost.
1183: */
1184: void
1185: set_fqdn()
1186: {
1.28 millert 1187: #ifdef HAVE_GETADDRINFO
1188: struct addrinfo *res0, hint;
1189: #else
1.2 millert 1190: struct hostent *hp;
1.28 millert 1191: #endif
1.2 millert 1192: char *p;
1193:
1.28 millert 1194: #ifdef HAVE_GETADDRINFO
1195: memset(&hint, 0, sizeof(hint));
1196: hint.ai_family = PF_UNSPEC;
1197: hint.ai_flags = AI_CANONNAME;
1198: if (getaddrinfo(user_host, NULL, &hint, &res0) != 0) {
1199: #else
1.14 millert 1200: if (!(hp = gethostbyname(user_host))) {
1.28 millert 1201: #endif
1.14 millert 1202: log_error(MSG_ONLY|NO_EXIT,
1.28 millert 1203: "unable to resolve host %s", user_host);
1.14 millert 1204: } else {
1205: if (user_shost != user_host)
1.27 millert 1206: efree(user_shost);
1207: efree(user_host);
1.28 millert 1208: #ifdef HAVE_GETADDRINFO
1209: user_host = estrdup(res0->ai_canonname);
1210: freeaddrinfo(res0);
1211: #else
1.14 millert 1212: user_host = estrdup(hp->h_name);
1.28 millert 1213: #endif
1.2 millert 1214: }
1215: if ((p = strchr(user_host, '.'))) {
1216: *p = '\0';
1217: user_shost = estrdup(user_host);
1218: *p = '.';
1219: } else {
1220: user_shost = user_host;
1221: }
1222: }
1223:
1224: /*
1.23 millert 1225: * Get passwd entry for the user we are going to run commands as.
1226: * By default, this is "root". Updates runas_pw as a side effect.
1227: */
1228: int
1229: set_runaspw(user)
1230: char *user;
1231: {
1232: if (runas_pw != NULL) {
1233: if (user_runas != &def_runas_default)
1234: return(TRUE); /* don't override -u option */
1.27 millert 1235: efree(runas_pw);
1.23 millert 1236: }
1237: if (*user == '#') {
1238: runas_pw = sudo_getpwuid(atoi(user + 1));
1239: if (runas_pw == NULL) {
1240: runas_pw = emalloc(sizeof(struct passwd));
1241: (void) memset((VOID *)runas_pw, 0, sizeof(struct passwd));
1242: runas_pw->pw_uid = atoi(user + 1);
1.33 ! millert 1243: runas_pw->pw_name = user;
! 1244: runas_pw->pw_passwd = "*";
! 1245: runas_pw->pw_gecos = user;
! 1246: runas_pw->pw_dir = "/";
! 1247: runas_pw->pw_shell = estrdup(_PATH_BSHELL);
1.23 millert 1248: }
1249: } else {
1250: runas_pw = sudo_getpwnam(user);
1251: if (runas_pw == NULL)
1252: log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %s!", user);
1253: }
1254: return(TRUE);
1255: }
1256:
1257: /*
1.6 millert 1258: * Get passwd entry for the user we are going to authenticate as.
1.23 millert 1259: * By default, this is the user invoking sudo. In the most common
1260: * case, this matches sudo_user.pw or runas_pw.
1.4 millert 1261: */
1.6 millert 1262: static struct passwd *
1263: get_authpw()
1.4 millert 1264: {
1265: struct passwd *pw;
1266:
1.23 millert 1267: if (def_rootpw) {
1268: if (runas_pw->pw_uid == 0)
1269: pw = runas_pw;
1270: else if ((pw = sudo_getpwuid(0)) == NULL)
1.4 millert 1271: log_error(0, "uid 0 does not exist in the passwd file!");
1.23 millert 1272: } else if (def_runaspw) {
1273: if (strcmp(def_runas_default, *user_runas) == 0)
1274: pw = runas_pw;
1275: else if ((pw = sudo_getpwnam(def_runas_default)) == NULL)
1.4 millert 1276: log_error(0, "user %s does not exist in the passwd file!",
1.23 millert 1277: def_runas_default);
1278: } else if (def_targetpw) {
1279: if (runas_pw->pw_name == NULL)
1280: log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %lu!",
1.25 millert 1281: (unsigned long) runas_pw->pw_uid);
1.23 millert 1282: pw = runas_pw;
1.6 millert 1283: } else
1284: pw = sudo_user.pw;
1285:
1286: return(pw);
1.4 millert 1287: }
1288:
1289: /*
1.1 millert 1290: * Tell which options are mutually exclusive and exit.
1291: */
1292: static void
1293: usage_excl(exit_val)
1294: int exit_val;
1295: {
1.27 millert 1296: warnx("Only one of the -e, -h, i, -k, -K, -l, -s, -v or -V options may be used");
1.1 millert 1297: usage(exit_val);
1298: }
1299:
1300: /*
1301: * Give usage message and exit.
1302: */
1303: static void
1304: usage(exit_val)
1305: int exit_val;
1306: {
1.27 millert 1307: char **p, **uvec[4];
1.29 millert 1308: int i, linelen, linemax, ulen, plen;
1.27 millert 1309: static char *uvec1[] = {
1.29 millert 1310: " -h |",
1311: " -K |",
1312: " -k |",
1313: " -L |",
1314: " -l |",
1315: " -V |",
1316: " -v",
1.27 millert 1317: NULL
1318: };
1319: static char *uvec2[] = {
1320: " [-bEHPS]",
1.23 millert 1321: #ifdef HAVE_BSD_AUTH_H
1322: " [-a auth_type]",
1323: #endif
1.8 millert 1324: #ifdef HAVE_LOGIN_CAP_H
1.23 millert 1325: " [-c class|-]",
1.8 millert 1326: #endif
1.33 ! millert 1327: #ifdef HAVE_SELINUX
! 1328: " [-r role]",
! 1329: #endif
1.23 millert 1330: " [-p prompt]",
1.33 ! millert 1331: #ifdef HAVE_SELINUX
! 1332: " [-t type]",
! 1333: #endif
1.23 millert 1334: " [-u username|#uid]",
1.27 millert 1335: " [VAR=value]",
1336: " {-i | -s | <command>}",
1337: NULL
1338: };
1339: static char *uvec3[] = {
1340: " -e",
1341: " [-S]",
1342: #ifdef HAVE_BSD_AUTH_H
1343: " [-a auth_type]",
1344: #endif
1345: #ifdef HAVE_LOGIN_CAP_H
1346: " [-c class|-]",
1347: #endif
1348: " [-p prompt]",
1349: " [-u username|#uid]",
1350: " file ...",
1.23 millert 1351: NULL
1352: };
1353:
1354: /*
1.27 millert 1355: * Use usage vectors appropriate to the progname.
1.23 millert 1356: */
1357: if (strcmp(getprogname(), "sudoedit") == 0) {
1.27 millert 1358: uvec[0] = uvec3 + 1;
1359: uvec[1] = NULL;
1.23 millert 1360: } else {
1.27 millert 1361: uvec[0] = uvec1;
1362: uvec[1] = uvec2;
1363: uvec[2] = uvec3;
1364: uvec[3] = NULL;
1.23 millert 1365: }
1366:
1367: /*
1.27 millert 1368: * Print usage and wrap lines as needed.
1.23 millert 1369: * Assumes an 80-character wide terminal, which is kind of bogus...
1370: */
1371: ulen = (int)strlen(getprogname()) + 7;
1372: linemax = 80;
1.27 millert 1373: for (i = 0; uvec[i] != NULL; i++) {
1.29 millert 1374: printf("usage: %s", getprogname());
1.27 millert 1375: linelen = linemax - ulen;
1376: for (p = uvec[i]; *p != NULL; p++) {
1.29 millert 1377: plen = (int)strlen(*p);
1378: if (linelen >= plen || linelen == linemax - ulen) {
1.27 millert 1379: fputs(*p, stdout);
1.29 millert 1380: linelen -= plen;
1.27 millert 1381: } else {
1382: p--;
1.29 millert 1383: linelen = linemax - ulen;
1.27 millert 1384: printf("\n%*s", ulen, "");
1385: }
1.23 millert 1386: }
1.27 millert 1387: putchar('\n');
1.23 millert 1388: }
1.1 millert 1389: exit(exit_val);
1390: }
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