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 $
34 #include <sys/param.h>
44 static void current(void);
45 static void pline(struct passwd *);
46 static void pretty(struct passwd *);
47 static void group(struct passwd *, int);
48 static void usage(void);
49 static void user(struct passwd *);
50 static struct passwd *
53 int isgroups, iswhoami;
56 main(int argc, char **argv)
60 int Gflag, Pflag, ch, gflag, id, nflag, pflag, rflag, uflag;
63 Gflag = Pflag = gflag = nflag = pflag = rflag = uflag = 0;
65 myname = strrchr(argv[0], '/');
66 myname = (myname != NULL) ? myname + 1 : argv[0];
67 if (strcmp(myname, "groups") == 0) {
71 else if (strcmp(myname, "whoami") == 0) {
76 while ((ch = getopt(argc, argv,
77 (isgroups || iswhoami) ? "" : "PGgnpru")) != -1)
107 if (iswhoami && argc > 0)
110 switch(Gflag + Pflag + gflag + pflag + uflag) {
114 if (!nflag && !rflag)
121 pw = *argv ? who(*argv) : NULL;
124 id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
125 if (nflag && (gr = getgrgid(id)))
126 printf("%s\n", gr->gr_name);
133 id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
134 if (nflag && (pw = getpwuid(id)))
135 printf("%s\n", pw->pw_name);
164 pretty(struct passwd *pw)
171 printf("uid\t%s\n", pw->pw_name);
175 if ((login = getlogin()) == NULL)
178 pw = getpwuid(rid = getuid());
179 if (pw == NULL || strcmp(login, pw->pw_name))
180 printf("login\t%s\n", login);
182 printf("uid\t%s\n", pw->pw_name);
184 printf("uid\t%u\n", rid);
186 if ((eid = geteuid()) != rid) {
187 if ((pw = getpwuid(eid)))
188 printf("euid\t%s\n", pw->pw_name);
190 printf("euid\t%u\n", eid);
192 if ((rid = getgid()) != (eid = getegid())) {
193 if ((gr = getgrgid(rid)))
194 printf("rgid\t%s\n", gr->gr_name);
196 printf("rgid\t%u\n", rid);
208 int cnt, id, eid, lastid, ngroups;
209 gid_t groups[NGROUPS];
213 printf("uid=%u", id);
214 if ((pw = getpwuid(id)))
215 printf("(%s)", pw->pw_name);
216 if ((eid = geteuid()) != id) {
217 printf(" euid=%u", eid);
218 if ((pw = getpwuid(eid)))
219 printf("(%s)", pw->pw_name);
222 printf(" gid=%u", id);
223 if ((gr = getgrgid(id)))
224 printf("(%s)", gr->gr_name);
225 if ((eid = getegid()) != id) {
226 printf(" egid=%u", eid);
227 if ((gr = getgrgid(eid)))
228 printf("(%s)", gr->gr_name);
230 if ((ngroups = getgroups(NGROUPS, groups))) {
231 for (fmt = " groups=%u", lastid = -1, cnt = 0; cnt < ngroups;
232 fmt = ", %u", lastid = id) {
237 if ((gr = getgrgid(id)))
238 printf("(%s)", gr->gr_name);
245 user(struct passwd *pw)
250 gid_t gid, lastgid, groups[NGROUPS + 1];
252 printf("uid=%u(%s)", pw->pw_uid, pw->pw_name);
254 printf(" gid=%u", gid);
255 if ((gr = getgrgid(gid)))
256 printf("(%s)", gr->gr_name);
257 ngroups = NGROUPS + 1;
258 getgrouplist(pw->pw_name, gid, groups, &ngroups);
260 for (lastgid = -1, cnt = 0; cnt < ngroups; ++cnt) {
261 if (lastgid == (gid = groups[cnt]))
265 if ((gr = getgrgid(gid)))
266 printf("(%s)", gr->gr_name);
273 group(struct passwd *pw, int nflag)
276 int cnt, id, lastid, ngroups;
277 gid_t groups[NGROUPS + 1];
281 ngroups = NGROUPS + 1;
282 getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
284 groups[0] = getgid();
285 ngroups = getgroups(NGROUPS, groups + 1) + 1;
287 fmt = nflag ? "%s" : "%u";
288 for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
289 if (lastid == (id = groups[cnt]))
292 if ((gr = getgrgid(id)))
293 printf(fmt, gr->gr_name);
295 printf(*fmt == ' ' ? " %u" : "%u",
307 static struct passwd *
315 * Translate user argument into a pw pointer. First, try to
316 * get it as specified. If that fails, try it as a number.
318 if ((pw = getpwnam(u)))
320 id = strtol(u, &ep, 10);
321 if (*u && !*ep && (pw = getpwuid(id)))
323 errx(1, "%s: no such user", u);
328 pline(struct passwd *pw)
333 if ((pw = getpwuid(rid = getuid())) == NULL)
337 printf("%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name,
338 pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
339 (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos,
340 pw->pw_dir, pw->pw_shell);
349 fprintf(stderr, "usage: groups [user]\n");
351 fprintf(stderr, "usage: whoami\n");
353 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
355 " id -G [-n] [user]",
357 " id -g [-nr] [user]",
359 " id -u [-nr] [user]");