2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)id.c 8.2 (Berkeley) 2/16/94
31 * $FreeBSD: src/usr.bin/id/id.c,v 1.12.2.3 2001/12/20 12:09:03 ru Exp $
32 * $DragonFly: src/usr.bin/id/id.c,v 1.6 2004/12/31 20:58:17 cpressey Exp $
35 #include <sys/param.h>
45 int main(int, char *[]);
46 static void current(void);
47 static void pline(struct passwd *);
48 static void pretty(struct passwd *);
49 static void group(struct passwd *, int);
50 static void usage(void);
51 static void user(struct passwd *);
52 static struct passwd *
55 int isgroups, iswhoami;
58 main(int argc, char **argv)
62 int Gflag, Pflag, ch, gflag, id, nflag, pflag, rflag, uflag;
65 Gflag = Pflag = gflag = nflag = pflag = rflag = uflag = 0;
67 myname = strrchr(argv[0], '/');
68 myname = (myname != NULL) ? myname + 1 : argv[0];
69 if (strcmp(myname, "groups") == 0) {
73 else if (strcmp(myname, "whoami") == 0) {
78 while ((ch = getopt(argc, argv,
79 (isgroups || iswhoami) ? "" : "PGgnpru")) != -1)
109 if (iswhoami && argc > 0)
112 switch(Gflag + Pflag + gflag + pflag + uflag) {
116 if (!nflag && !rflag)
123 pw = *argv ? who(*argv) : NULL;
126 id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
127 if (nflag && (gr = getgrgid(id)))
128 printf("%s\n", gr->gr_name);
135 id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
136 if (nflag && (pw = getpwuid(id)))
137 printf("%s\n", pw->pw_name);
166 pretty(struct passwd *pw)
173 printf("uid\t%s\n", pw->pw_name);
177 if ((login = getlogin()) == NULL)
180 pw = getpwuid(rid = getuid());
181 if (pw == NULL || strcmp(login, pw->pw_name))
182 printf("login\t%s\n", login);
184 printf("uid\t%s\n", pw->pw_name);
186 printf("uid\t%u\n", rid);
188 if ((eid = geteuid()) != rid) {
189 if ((pw = getpwuid(eid)))
190 printf("euid\t%s\n", pw->pw_name);
192 printf("euid\t%u\n", eid);
194 if ((rid = getgid()) != (eid = getegid())) {
195 if ((gr = getgrgid(rid)))
196 printf("rgid\t%s\n", gr->gr_name);
198 printf("rgid\t%u\n", rid);
210 int cnt, id, eid, lastid, ngroups;
211 gid_t groups[NGROUPS];
215 printf("uid=%u", id);
216 if ((pw = getpwuid(id)))
217 printf("(%s)", pw->pw_name);
218 if ((eid = geteuid()) != id) {
219 printf(" euid=%u", eid);
220 if ((pw = getpwuid(eid)))
221 printf("(%s)", pw->pw_name);
224 printf(" gid=%u", id);
225 if ((gr = getgrgid(id)))
226 printf("(%s)", gr->gr_name);
227 if ((eid = getegid()) != id) {
228 printf(" egid=%u", eid);
229 if ((gr = getgrgid(eid)))
230 printf("(%s)", gr->gr_name);
232 if ((ngroups = getgroups(NGROUPS, groups))) {
233 for (fmt = " groups=%u", lastid = -1, cnt = 0; cnt < ngroups;
234 fmt = ", %u", lastid = id) {
239 if ((gr = getgrgid(id)))
240 printf("(%s)", gr->gr_name);
247 user(struct passwd *pw)
252 gid_t gid, lastgid, groups[NGROUPS + 1];
254 printf("uid=%u(%s)", pw->pw_uid, pw->pw_name);
256 printf(" gid=%u", gid);
257 if ((gr = getgrgid(gid)))
258 printf("(%s)", gr->gr_name);
259 ngroups = NGROUPS + 1;
260 getgrouplist(pw->pw_name, gid, groups, &ngroups);
262 for (lastgid = -1, cnt = 0; cnt < ngroups; ++cnt) {
263 if (lastgid == (gid = groups[cnt]))
267 if ((gr = getgrgid(gid)))
268 printf("(%s)", gr->gr_name);
275 group(struct passwd *pw, int nflag)
278 int cnt, id, lastid, ngroups;
279 gid_t groups[NGROUPS + 1];
283 ngroups = NGROUPS + 1;
284 getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
286 groups[0] = getgid();
287 ngroups = getgroups(NGROUPS, groups + 1) + 1;
289 fmt = nflag ? "%s" : "%u";
290 for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
291 if (lastid == (id = groups[cnt]))
294 if ((gr = getgrgid(id)))
295 printf(fmt, gr->gr_name);
297 printf(*fmt == ' ' ? " %u" : "%u",
309 static struct passwd *
317 * Translate user argument into a pw pointer. First, try to
318 * get it as specified. If that fails, try it as a number.
320 if ((pw = getpwnam(u)))
322 id = strtol(u, &ep, 10);
323 if (*u && !*ep && (pw = getpwuid(id)))
325 errx(1, "%s: no such user", u);
330 pline(struct passwd *pw)
335 if ((pw = getpwuid(rid = getuid())) == NULL)
339 printf("%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name,
340 pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
341 (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos,
342 pw->pw_dir, pw->pw_shell);
351 fprintf(stderr, "usage: groups [user]\n");
353 fprintf(stderr, "usage: whoami\n");
355 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
357 " id -G [-n] [user]",
359 " id -g [-nr] [user]",
361 " id -u [-nr] [user]");