Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/id/id.c	Lines:	78	166	47.0 %
Date:	2017-11-13	Branches:	62	144	43.1 %


/*	$OpenBSD: id.c,v 1.28 2017/05/30 15:29:53 tedu Exp $	*/

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/socket.h> /* getrtable() lives here */

#include <err.h>
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <login_cap.h>

void	current(void);
void	pretty(struct passwd *);
void	group(struct passwd *, int);
void	usage(void);
void	user(struct passwd *);
struct passwd *
	who(char *);

int
main(int argc, char *argv[])
{
	struct group *gr;
	struct passwd *pw;
	int ch, cflag, Gflag, gflag, nflag, pflag, Rflag, rflag, uflag;
	uid_t uid;
	gid_t gid;
	const char *opts;

	if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1)
		err(1, "pledge");

	cflag = Gflag = gflag = nflag = pflag = Rflag = rflag = uflag = 0;

	if (strcmp(getprogname(), "groups") == 0) {
		Gflag = 1;
		nflag = 1;
		opts = "";
		if (argc > 2)
			usage();
	} else if (strcmp(getprogname(), "whoami") == 0) {
		uflag = 1;
		nflag = 1;
		opts = "";
		if (argc > 1)
			usage();
	} else
		opts = "cGgnpRru";

	while ((ch = getopt(argc, argv, opts)) != -1)
		switch(ch) {
		case 'c':
			cflag = 1;
			break;
		case 'G':
			Gflag = 1;
			break;
		case 'g':
			gflag = 1;
			break;
		case 'n':
			nflag = 1;
			break;
		case 'p':
			pflag = 1;
			break;
		case 'R':
			Rflag = 1;
			break;
		case 'r':
			rflag = 1;
			break;
		case 'u':
			uflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	switch (cflag + Gflag + gflag + pflag + Rflag + uflag) {
	case 1:
		break;
	case 0:
		if (!nflag && !rflag)
			break;
		/* FALLTHROUGH */
	default:
		usage();
	}

	if (strcmp(opts, "") != 0 && argc > 1)
		usage();

	if (Rflag) {
		printf("%d\n", getrtable());
		exit(0);
	}

	pw = *argv ? who(*argv) : NULL;

	if (cflag) {
		if (pw == NULL)
			pw = getpwuid(getuid());
		if (pw != NULL && pw->pw_class != NULL && *pw->pw_class != '\0')
			(void)printf("%s\n", pw->pw_class);
		else
			(void)printf("%s\n", LOGIN_DEFCLASS);
		exit(0);
	}

	if (gflag) {
		gid = pw ? pw->pw_gid : rflag ? getgid() : getegid();
		if (nflag && (gr = getgrgid(gid)))
			(void)printf("%s\n", gr->gr_name);
		else
			(void)printf("%u\n", gid);
		exit(0);
	}

	if (uflag) {
		uid = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
		if (nflag && (pw = getpwuid(uid)))
			(void)printf("%s\n", pw->pw_name);
		else
			(void)printf("%u\n", uid);
		exit(0);
	}

	if (Gflag) {
		group(pw, nflag);
		exit(0);
	}

	if (pflag) {
		pretty(pw);
		exit(0);
	}

	if (pw)
		user(pw);
	else
		current();
	exit(0);
}

void
pretty(struct passwd *pw)
{
	struct group *gr;
	uid_t eid, rid;
	char *login;

	if (pw) {
		(void)printf("uid\t%s\n", pw->pw_name);
		(void)printf("groups\t");
		group(pw, 1);
	} else {
		if ((login = getlogin()) == NULL)
			err(1, "getlogin");

		pw = getpwuid(rid = getuid());
		if (pw == NULL || strcmp(login, pw->pw_name))
			(void)printf("login\t%s\n", login);
		if (pw)
			(void)printf("uid\t%s\n", pw->pw_name);
		else
			(void)printf("uid\t%u\n", rid);

		if ((eid = geteuid()) != rid) {
			if ((pw = getpwuid(eid)))
				(void)printf("euid\t%s\n", pw->pw_name);
			else
				(void)printf("euid\t%u\n", eid);
		}
		if ((rid = getgid()) != (eid = getegid())) {
			if ((gr = getgrgid(rid)))
				(void)printf("rgid\t%s\n", gr->gr_name);
			else
				(void)printf("rgid\t%u\n", rid);
		}
		(void)printf("groups\t");
		group(NULL, 1);
	}
	if (pw != NULL && pw->pw_class != NULL && *pw->pw_class != '\0')
		(void)printf("class\t%s\n", pw->pw_class);
}

void
current(void)
{
	struct group *gr;
	struct passwd *pw;
	int cnt, ngroups;
	uid_t uid, euid;
	gid_t groups[NGROUPS_MAX], gid, egid, lastgid;
	char *prefix;

	uid = getuid();
	(void)printf("uid=%u", uid);
	if ((pw = getpwuid(uid)))
		(void)printf("(%s)", pw->pw_name);
	if ((euid = geteuid()) != uid) {
		(void)printf(" euid=%u", euid);
		if ((pw = getpwuid(euid)))
			(void)printf("(%s)", pw->pw_name);
	}
	gid = getgid();
	(void)printf(" gid=%u", gid);
	if ((gr = getgrgid(gid)))
		(void)printf("(%s)", gr->gr_name);
	if ((egid = getegid()) != gid) {
		(void)printf(" egid=%u", egid);
		if ((gr = getgrgid(egid)))
			(void)printf("(%s)", gr->gr_name);
	}
	if ((ngroups = getgroups(NGROUPS_MAX, groups))) {
		for (prefix = " groups=", lastgid = (gid_t)-1, cnt = 0;
		    cnt < ngroups; prefix = ", ", lastgid = gid) {
			gid = groups[cnt++];
			if (lastgid == gid)
				continue;
			(void)printf("%s%u", prefix, gid);
			if ((gr = getgrgid(gid)))
				(void)printf("(%s)", gr->gr_name);
		}
	}
	(void)printf("\n");
}

void
user(struct passwd *pw)
{
	gid_t gid, groups[NGROUPS_MAX + 1];
	int cnt, ngroups;
	uid_t uid;
	struct group *gr;
	char *prefix;

	uid = pw->pw_uid;
	(void)printf("uid=%u(%s)", uid, pw->pw_name);
	(void)printf(" gid=%u", pw->pw_gid);
	if ((gr = getgrgid(pw->pw_gid)))
		(void)printf("(%s)", gr->gr_name);
	ngroups = NGROUPS_MAX + 1;
	(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
	prefix = " groups=";
	for (cnt = 0; cnt < ngroups;) {
		gid = groups[cnt];
		(void)printf("%s%u", prefix, gid);
		prefix = ", ";
		if ((gr = getgrgid(gid)))
			(void)printf("(%s)", gr->gr_name);
		/* Skip same gid entries. */
		while (++cnt < ngroups && gid == groups[cnt])
			;
	}
	(void)printf("\n");
}

void
group(struct passwd *pw, int nflag)
{
	int cnt, ngroups;
	gid_t gid, groups[NGROUPS_MAX + 1];
	struct group *gr;
	char *prefix;

	if (pw) {
		ngroups = NGROUPS_MAX + 1;
		(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
	} else {
		groups[0] = getgid();
		ngroups = getgroups(NGROUPS_MAX, groups + 1) + 1;
	}
	prefix = "";
	for (cnt = 0; cnt < ngroups;) {
		gid = groups[cnt];
		if (nflag) {
			if ((gr = getgrgid(gid)))
				(void)printf("%s%s", prefix, gr->gr_name);
			else
				(void)printf("%s%u", prefix, gid);
		} else {
			(void)printf("%s%u", prefix, gid);
		}
		prefix = " ";
		/* Skip same gid entries. */
		while (++cnt < ngroups && gid == groups[cnt])
			;
	}
	(void)printf("\n");
}

struct passwd *
who(char *u)
{
	struct passwd *pw;
	uid_t uid;
	const char *errstr;

	/*
	 * Translate user argument into a pw pointer.  First, try to
	 * get it as specified.  If that fails, try it as a number.
	 */
	if ((pw = getpwnam(u)))
		return(pw);
	uid = strtonum(u, 0, UID_MAX, &errstr);
	if (!errstr && (pw = getpwuid(uid)))
		return(pw);
	errx(1, "%s: No such user", u);
	/* NOTREACHED */
}

void
usage(void)
{
	if (strcmp(getprogname(), "groups") == 0) {
		(void)fprintf(stderr, "usage: groups [user]\n");
	} else if (strcmp(getprogname(), "whoami") == 0) {
		(void)fprintf(stderr, "usage: whoami\n");
	} else {
		(void)fprintf(stderr, "usage: id [user]\n");
		(void)fprintf(stderr, "       id -c [user]\n");
		(void)fprintf(stderr, "       id -G [-n] [user]\n");
		(void)fprintf(stderr, "       id -g [-nr] [user]\n");
		(void)fprintf(stderr, "       id -p [user]\n");
		(void)fprintf(stderr, "       id -R\n");
		(void)fprintf(stderr, "       id -u [-nr] [user]\n");
	}
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: id.c,v 1.28 2017/05/30 15:29:53 tedu Exp $ */
2
3			/*-
4			* Copyright (c) 1991, 1993
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. Neither the name of the University nor the names of its contributors
16			* may be used to endorse or promote products derived from this software
17			* without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <sys/types.h>
33			#include <sys/socket.h> /* getrtable() lives here */
34
35			#include <err.h>
36			#include <errno.h>
37			#include <grp.h>
38			#include <pwd.h>
39			#include <stdio.h>
40			#include <stdlib.h>
41			#include <string.h>
42			#include <unistd.h>
43			#include <limits.h>
44			#include <login_cap.h>
45
46			void current(void);
47			void pretty(struct passwd *);
48			void group(struct passwd *, int);
49			void usage(void);
50			void user(struct passwd *);
51			struct passwd *
52			who(char *);
53
54			int
55			main(int argc, char *argv[])
56			{
57			struct group *gr;
58			struct passwd *pw;
59			int ch, cflag, Gflag, gflag, nflag, pflag, Rflag, rflag, uflag;
60			uid_t uid;
61			gid_t gid;
62			const char *opts;
63
64	✗✓	2750	if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1)
65			err(1, "pledge");
66
67			cflag = Gflag = gflag = nflag = pflag = Rflag = rflag = uflag = 0;
68
69	✗✓	1375	if (strcmp(getprogname(), "groups") == 0) {
70			Gflag = 1;
71			nflag = 1;
72			opts = "";
73			if (argc > 2)
74			usage();
75	✗✓	1375	} else if (strcmp(getprogname(), "whoami") == 0) {
76			uflag = 1;
77			nflag = 1;
78			opts = "";
79			if (argc > 1)
80			usage();
81			} else
82			opts = "cGgnpRru";
83
84	✓✓	5492	while ((ch = getopt(argc, argv, opts)) != -1)
85	✗✗✓✓ ✓✗✗✓ ✗	1371	switch(ch) {
86			case 'c':
87			cflag = 1;
88			break;
89			case 'G':
90			Gflag = 1;
91			break;
92			case 'g':
93			gflag = 1;
94		293	break;
95			case 'n':
96			nflag = 1;
97		11	break;
98			case 'p':
99			pflag = 1;
100		5	break;
101			case 'R':
102			Rflag = 1;
103			break;
104			case 'r':
105			rflag = 1;
106			break;
107			case 'u':
108			uflag = 1;
109		1062	break;
110			case '?':
111			default:
112			usage();
113			}
114		1390	argc -= optind;
115		1390	argv += optind;
116
117	✓✗✓	1390	switch (cflag + Gflag + gflag + pflag + Rflag + uflag) {
118			case 1:
119			break;
120			case 0:
121	✗✓	15	if (!nflag && !rflag)
122			break;
123			/* FALLTHROUGH */
124			default:
125			usage();
126			}
127
128	✗✓	1375	if (strcmp(opts, "") != 0 && argc > 1)
129			usage();
130
131	✗✓	1375	if (Rflag) {
132			printf("%d\n", getrtable());
133			exit(0);
134			}
135
136	✗✓	2750	pw = argv ? who(argv) : NULL;
137
138	✗✓	1375	if (cflag) {
139			if (pw == NULL)
140			pw = getpwuid(getuid());
141			if (pw != NULL && pw->pw_class != NULL && *pw->pw_class != '\0')
142			(void)printf("%s\n", pw->pw_class);
143			else
144			(void)printf("%s\n", LOGIN_DEFCLASS);
145			exit(0);
146			}
147
148	✓✓	1375	if (gflag) {
149	✗✓✗✓	1172	gid = pw ? pw->pw_gid : rflag ? getgid() : getegid();
150	✓✓✓✗	298	if (nflag && (gr = getgrgid(gid)))
151		5	(void)printf("%s\n", gr->gr_name);
152			else
153		288	(void)printf("%u\n", gid);
154			exit(0);
155			}
156
157	✓✓	1082	if (uflag) {
158	✗✓✗✓	4248	uid = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
159	✓✓✓✗	1068	if (nflag && (pw = getpwuid(uid)))
160		6	(void)printf("%s\n", pw->pw_name);
161			else
162		1056	(void)printf("%u\n", uid);
163			exit(0);
164			}
165
166	✗✓	20	if (Gflag) {
167			group(pw, nflag);
168			exit(0);
169			}
170
171	✓✓	20	if (pflag) {
172			pretty(pw);
173			exit(0);
174			}
175
176	✗✓	15	if (pw)
177			user(pw);
178			else
179		15	current();
180			exit(0);
181			}
182
183			void
184			pretty(struct passwd *pw)
185			{
186			struct group *gr;
187			uid_t eid, rid;
188			char *login;
189
190	✗✓	10	if (pw) {
191			(void)printf("uid\t%s\n", pw->pw_name);
192			(void)printf("groups\t");
193			group(pw, 1);
194			} else {
195	✗✓	5	if ((login = getlogin()) == NULL)
196			err(1, "getlogin");
197
198		5	pw = getpwuid(rid = getuid());
199	✓✗✗✓	10	if (pw == NULL \|\| strcmp(login, pw->pw_name))
200			(void)printf("login\t%s\n", login);
201	✓✗	5	if (pw)
202		5	(void)printf("uid\t%s\n", pw->pw_name);
203			else
204			(void)printf("uid\t%u\n", rid);
205
206	✗✓	5	if ((eid = geteuid()) != rid) {
207			if ((pw = getpwuid(eid)))
208			(void)printf("euid\t%s\n", pw->pw_name);
209			else
210			(void)printf("euid\t%u\n", eid);
211			}
212	✗✓	5	if ((rid = getgid()) != (eid = getegid())) {
213			if ((gr = getgrgid(rid)))
214			(void)printf("rgid\t%s\n", gr->gr_name);
215			else
216			(void)printf("rgid\t%u\n", rid);
217			}
218		5	(void)printf("groups\t");
219		5	group(NULL, 1);
220			}
221	✓✗✓✗ ✓✗	15	if (pw != NULL && pw->pw_class != NULL && *pw->pw_class != '\0')
222		5	(void)printf("class\t%s\n", pw->pw_class);
223		5	}
224
225			void
226			current(void)
227			{
228			struct group *gr;
229			struct passwd *pw;
230			int cnt, ngroups;
231			uid_t uid, euid;
232		30	gid_t groups[NGROUPS_MAX], gid, egid, lastgid;
233			char *prefix;
234
235		15	uid = getuid();
236		15	(void)printf("uid=%u", uid);
237	✓✗	15	if ((pw = getpwuid(uid)))
238		15	(void)printf("(%s)", pw->pw_name);
239	✗✓	15	if ((euid = geteuid()) != uid) {
240			(void)printf(" euid=%u", euid);
241			if ((pw = getpwuid(euid)))
242			(void)printf("(%s)", pw->pw_name);
243			}
244		15	gid = getgid();
245		15	(void)printf(" gid=%u", gid);
246	✓✗	15	if ((gr = getgrgid(gid)))
247		15	(void)printf("(%s)", gr->gr_name);
248	✗✓	15	if ((egid = getegid()) != gid) {
249			(void)printf(" egid=%u", egid);
250			if ((gr = getgrgid(egid)))
251			(void)printf("(%s)", gr->gr_name);
252			}
253	✓✗	15	if ((ngroups = getgroups(NGROUPS_MAX, groups))) {
254	✓✓	240	for (prefix = " groups=", lastgid = (gid_t)-1, cnt = 0;
255		120	cnt < ngroups; prefix = ", ", lastgid = gid) {
256		105	gid = groups[cnt++];
257	✓✗	105	if (lastgid == gid)
258			continue;
259		105	(void)printf("%s%u", prefix, gid);
260	✓✗	105	if ((gr = getgrgid(gid)))
261		105	(void)printf("(%s)", gr->gr_name);
262			}
263			}
264		15	(void)printf("\n");
265		15	}
266
267			void
268			user(struct passwd *pw)
269			{
270			gid_t gid, groups[NGROUPS_MAX + 1];
271			int cnt, ngroups;
272			uid_t uid;
273			struct group *gr;
274			char *prefix;
275
276			uid = pw->pw_uid;
277			(void)printf("uid=%u(%s)", uid, pw->pw_name);
278			(void)printf(" gid=%u", pw->pw_gid);
279			if ((gr = getgrgid(pw->pw_gid)))
280			(void)printf("(%s)", gr->gr_name);
281			ngroups = NGROUPS_MAX + 1;
282			(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
283			prefix = " groups=";
284			for (cnt = 0; cnt < ngroups;) {
285			gid = groups[cnt];
286			(void)printf("%s%u", prefix, gid);
287			prefix = ", ";
288			if ((gr = getgrgid(gid)))
289			(void)printf("(%s)", gr->gr_name);
290			/* Skip same gid entries. */
291			while (++cnt < ngroups && gid == groups[cnt])
292			;
293			}
294			(void)printf("\n");
295			}
296
297			void
298			group(struct passwd *pw, int nflag)
299			{
300		10	int cnt, ngroups;
301		5	gid_t gid, groups[NGROUPS_MAX + 1];
302			struct group *gr;
303			char *prefix;
304
305	✗✓	5	if (pw) {
306			ngroups = NGROUPS_MAX + 1;
307			(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
308			} else {
309		5	groups[0] = getgid();
310		5	ngroups = getgroups(NGROUPS_MAX, groups + 1) + 1;
311			}
312			prefix = "";
313	✓✓	80	for (cnt = 0; cnt < ngroups;) {
314		35	gid = groups[cnt];
315	✓✗	35	if (nflag) {
316	✓✗	35	if ((gr = getgrgid(gid)))
317		35	(void)printf("%s%s", prefix, gr->gr_name);
318			else
319			(void)printf("%s%u", prefix, gid);
320			} else {
321			(void)printf("%s%u", prefix, gid);
322			}
323			prefix = " ";
324			/* Skip same gid entries. */
325	✓✓✓✓	115	while (++cnt < ngroups && gid == groups[cnt])
326			;
327			}
328		5	(void)printf("\n");
329		5	}
330
331			struct passwd *
332			who(char *u)
333			{
334			struct passwd *pw;
335			uid_t uid;
336			const char *errstr;
337
338			/*
339			* Translate user argument into a pw pointer. First, try to
340			* get it as specified. If that fails, try it as a number.
341			*/
342			if ((pw = getpwnam(u)))
343			return(pw);
344			uid = strtonum(u, 0, UID_MAX, &errstr);
345			if (!errstr && (pw = getpwuid(uid)))
346			return(pw);
347			errx(1, "%s: No such user", u);
348			/* NOTREACHED */
349			}
350
351			void
352			usage(void)
353			{
354			if (strcmp(getprogname(), "groups") == 0) {
355			(void)fprintf(stderr, "usage: groups [user]\n");
356			} else if (strcmp(getprogname(), "whoami") == 0) {
357			(void)fprintf(stderr, "usage: whoami\n");
358			} else {
359			(void)fprintf(stderr, "usage: id [user]\n");
360			(void)fprintf(stderr, " id -c [user]\n");
361			(void)fprintf(stderr, " id -G [-n] [user]\n");
362			(void)fprintf(stderr, " id -g [-nr] [user]\n");
363			(void)fprintf(stderr, " id -p [user]\n");
364			(void)fprintf(stderr, " id -R\n");
365			(void)fprintf(stderr, " id -u [-nr] [user]\n");
366			}
367			exit(1);
368			}