2 * Copyright (c) 1993-1996, 1998-2010 Todd C. Miller <Todd.Miller@courtesan.com>
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.
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.
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.
23 #include <sys/types.h>
24 #include <sys/param.h>
34 #endif /* STDC_HEADERS */
37 #endif /* HAVE_STRING_H */
40 #endif /* HAVE_STRINGS_H */
43 #endif /* HAVE_UNISTD_H */
49 #include <sudo_usage.h>
54 static void usage_excl __P((int))
55 __attribute__((__noreturn__));
61 extern char **NewArgv;
62 extern int user_closefrom;
63 extern char *runas_user;
64 extern char *runas_group;
70 #ifdef HAVE_BSD_AUTH_H
72 #endif /* HAVE_BSD_AUTH_H */
75 * Command line argument parsing.
76 * Sets NewArgc and NewArgv which corresponds to the argc/argv we'll use
77 * for the command to be run (if we are running one).
80 parse_args(argc, argv)
84 int mode = 0; /* what mode is sudo to be run in? */
85 int flags = 0; /* mode flags */
88 /* First, check to see if we were invoked as "sudoedit". */
89 if (strcmp(getprogname(), "sudoedit") == 0)
92 /* Returns true if the last option string was "--" */
93 #define got_end_of_args (optind > 1 && argv[optind - 1][0] == '-' && \
94 argv[optind - 1][1] == '-' && argv[optind - 1][2] == '\0')
96 /* Returns true if next option is an environment variable */
97 #define is_envar (optind < argc && argv[optind][0] != '/' && \
98 strchr(argv[optind], '=') != NULL)
100 /* Flags allowed when running a command */
101 valid_flags = MODE_BACKGROUND|MODE_PRESERVE_ENV|MODE_RESET_HOME|
102 MODE_LOGIN_SHELL|MODE_INVALIDATE|MODE_NONINTERACTIVE|
103 MODE_PRESERVE_GROUPS|MODE_SHELL;
106 * We disable arg permutation for GNU getopt().
107 * Some trickiness is required to allow environment variables
108 * to be interspersed with command line options.
110 if ((ch = getopt(argc, argv, "+Aa:bC:c:Eeg:HhiKkLlnPp:r:Sst:U:u:Vv")) != -1) {
113 SET(tgetpass_flags, TGP_ASKPASS);
115 #ifdef HAVE_BSD_AUTH_H
117 login_style = optarg;
121 SET(flags, MODE_BACKGROUND);
124 if ((user_closefrom = atoi(optarg)) < 3) {
125 warningx("the argument to -C must be at least 3");
129 #ifdef HAVE_LOGIN_CAP_H
131 login_class = optarg;
132 def_use_loginclass = TRUE;
136 SET(flags, MODE_PRESERVE_ENV);
139 if (mode && mode != MODE_EDIT)
142 valid_flags = MODE_INVALIDATE|MODE_NONINTERACTIVE;
145 runas_group = optarg;
148 SET(flags, MODE_RESET_HOME);
151 if (mode && mode != MODE_HELP) {
152 if (strcmp(getprogname(), "sudoedit") != 0)
159 SET(flags, MODE_LOGIN_SHELL);
160 def_env_reset = TRUE;
163 SET(flags, MODE_INVALIDATE);
166 if (mode && mode != MODE_KILL)
172 if (mode && mode != MODE_LISTDEFS)
174 mode = MODE_LISTDEFS;
175 valid_flags = MODE_INVALIDATE|MODE_NONINTERACTIVE;
179 if (mode == MODE_LIST)
185 valid_flags = MODE_INVALIDATE|MODE_NONINTERACTIVE;
188 SET(flags, MODE_NONINTERACTIVE);
191 SET(flags, MODE_PRESERVE_GROUPS);
194 user_prompt = optarg;
195 def_passprompt_override = TRUE;
206 SET(tgetpass_flags, TGP_STDIN);
209 SET(flags, MODE_SHELL);
212 if ((list_pw = sudo_getpwnam(optarg)) == NULL)
213 errorx(1, "unknown user: %s", optarg);
219 if (mode && mode != MODE_VALIDATE)
221 mode = MODE_VALIDATE;
222 valid_flags = MODE_INVALIDATE|MODE_NONINTERACTIVE;
225 if (mode && mode != MODE_VERSION)
233 } else if (!got_end_of_args && is_envar) {
234 struct list_member *ev;
236 /* Store environment variable. */
237 ev = emalloc(sizeof(*ev));
238 ev->value = argv[optind];
239 ev->next = sudo_user.env_vars;
240 sudo_user.env_vars = ev;
242 /* Crank optind and resume getopt. */
245 /* Not an option or an environment variable -- we're done. */
250 NewArgc = argc - optind;
251 NewArgv = argv + optind;
254 /* Defer -k mode setting until we know whether it is a flag or not */
255 if (ISSET(flags, MODE_INVALIDATE) && NewArgc == 0) {
256 mode = MODE_INVALIDATE; /* -k by itself */
257 CLR(flags, MODE_INVALIDATE);
260 mode = MODE_RUN; /* running a command */
264 if (NewArgc > 0 && mode == MODE_LIST)
267 if (ISSET(flags, MODE_LOGIN_SHELL)) {
268 if (ISSET(flags, MODE_SHELL)) {
269 warningx("you may not specify both the `-i' and `-s' options");
272 if (ISSET(flags, MODE_PRESERVE_ENV)) {
273 warningx("you may not specify both the `-i' and `-E' options");
276 SET(flags, MODE_SHELL);
278 if ((flags & valid_flags) != flags)
280 if (mode == MODE_EDIT &&
281 (ISSET(flags, MODE_PRESERVE_ENV) || sudo_user.env_vars != NULL)) {
282 if (ISSET(mode, MODE_PRESERVE_ENV))
283 warningx("the `-E' option is not valid in edit mode");
284 if (sudo_user.env_vars != NULL)
285 warningx("you may not specify environment variables in edit mode");
288 if ((runas_user != NULL || runas_group != NULL) &&
289 !ISSET(mode, MODE_EDIT | MODE_RUN | MODE_CHECK | MODE_VALIDATE)) {
292 if (list_pw != NULL && mode != MODE_LIST && mode != MODE_CHECK) {
293 warningx("the `-U' option may only be used with the `-l' option");
296 if (ISSET(tgetpass_flags, TGP_STDIN) && ISSET(tgetpass_flags, TGP_ASKPASS)) {
297 warningx("the `-A' and `-S' options may not be used together");
300 if ((NewArgc == 0 && mode == MODE_EDIT) ||
301 (NewArgc > 0 && !ISSET(mode, MODE_RUN | MODE_EDIT | MODE_CHECK)))
303 if (NewArgc == 0 && mode == MODE_RUN && !ISSET(flags, MODE_SHELL))
304 SET(flags, (MODE_IMPLIED_SHELL | MODE_SHELL));
306 return(mode | flags);
313 return fputs(buf, stderr);
317 * Give usage message and exit.
318 * The actual usage strings are in sudo_usage.h for configure substitution.
329 * Use usage vectors appropriate to the progname.
331 if (strcmp(getprogname(), "sudoedit") == 0) {
332 uvec[0] = SUDO_USAGE5 + 3;
335 uvec[0] = SUDO_USAGE1;
336 uvec[1] = SUDO_USAGE2;
337 uvec[2] = SUDO_USAGE3;
338 uvec[3] = SUDO_USAGE4;
339 uvec[4] = SUDO_USAGE5;
344 * Print usage and wrap lines as needed, depending on the
347 ulen = (int)strlen(getprogname()) + 8;
348 lbuf_init(&lbuf, usage_out, ulen, NULL);
349 for (i = 0; uvec[i] != NULL; i++) {
350 lbuf_append(&lbuf, "usage: ", getprogname(), uvec[i], NULL);
358 * Tell which options are mutually exclusive and exit.
364 warningx("Only one of the -e, -h, -i, -K, -l, -s, -v or -V options may be specified");