[unix-history] / usr / src / usr.bin / id / id.c

/*-
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1991, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)id.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include <sys/param.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

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

int
main(argc, argv)
	int argc;
	char *argv[];
{
	struct group *gr;
	struct passwd *pw;
	int Gflag, ch, gflag, id, nflag, pflag, rflag, uflag;

	Gflag = gflag = nflag = pflag = rflag = uflag = 0;
	while ((ch = getopt(argc, argv, "Ggnpru")) != EOF)
		switch(ch) {
		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 'u':
			uflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

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

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

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

	if (uflag) {
		id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
		if (nflag && (pw = getpwuid(id)))
			(void)printf("%s\n", pw->pw_name);
		else
			(void)printf("%u\n", id);
		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(pw)
	struct passwd *pw;
{
	struct group *gr;
	u_int 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("getlogin: %s", strerror(errno));

		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", pw->pw_name);
			else
				(void)printf("euid\t%u", 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);
	}
}

void
current()
{
	struct group *gr;
	struct passwd *pw;
	int cnt, id, eid, lastid, ngroups, groups[NGROUPS];
	char *fmt;

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

void
user(pw)
	register struct passwd *pw;
{
	register struct group *gr;
	register char *fmt, **p;
	int cnt, id, lastid, ngroups, groups[NGROUPS + 1];

	id = pw->pw_uid;
	(void)printf("uid=%u(%s)", id, pw->pw_name);
	(void)printf(" gid=%u", pw->pw_gid);
	if (gr = getgrgid(id))
		(void)printf("(%s)", gr->gr_name);
	ngroups = NGROUPS + 1;
	(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
	fmt = " groups=%u";
	for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
		if (lastid == (id = groups[cnt]))
			continue;
		(void)printf(fmt, id);
		fmt = " %u";
		if (gr = getgrgid(id))
			(void)printf("(%s)", gr->gr_name);
		lastid = id;
	}
	(void)printf("\n");
}

void
group(pw, nflag)
	struct passwd *pw;
	int nflag;
{
	struct group *gr;
	int cnt, id, lastid, ngroups, groups[NGROUPS + 1];
	char *fmt;

	if (pw) {
		ngroups = NGROUPS + 1;
		(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
	} else {
		groups[0] = getgid();
		ngroups = getgroups(NGROUPS, groups + 1) + 1;
	}
	fmt = nflag ? "%s" : "%u";
	for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
		if (lastid == (id = groups[cnt]))
			continue;
		if (nflag) {
			if (gr = getgrgid(id))
				(void)printf(fmt, gr->gr_name);
			else
				(void)printf(*fmt == ' ' ? " %u" : "%u",
				    id);
			fmt = " %s";
		} else {
			(void)printf(fmt, id);
			fmt = " %u";
		}
		lastid = id;
	}
	(void)printf("\n");
}

struct passwd *
who(u)
	char *u;
{
	struct passwd *pw;
	long id;
	char *ep;

	/*
	 * 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);
	id = strtol(u, &ep, 10);
	if (*u && !*ep && (pw = getpwuid(id)))
		return(pw);
	err("%s: No such user", u);
	/* NOTREACHED */
}

#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

void
#if __STDC__
err(const char *fmt, ...)
#else
err(fmt, va_alist)
	char *fmt;
        va_dcl
#endif
{
	va_list ap;
#if __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void)fprintf(stderr, "id: ");
	(void)vfprintf(stderr, fmt, ap);
	va_end(ap);
	(void)fprintf(stderr, "\n");
	exit(1);
	/* NOTREACHED */
}

void
usage()
{
	(void)fprintf(stderr, "usage: id [user]\n");
	(void)fprintf(stderr, "       id -G [-n] [user]\n");
	(void)fprintf(stderr, "       id -g [-nr] [user]\n");
	(void)fprintf(stderr, "       id -u [-nr] [user]\n");
	exit(1);
}
Commit	Line	Data
be1dd919	1	/*-
ad787160 C	2	* Copyright (c) 1991, 1993
ad787160 C	3	* The Regents of the University of California. All rights reserved.
be1dd919	4	*
ad787160 C	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
be1dd919 KB	32	*/
	33
	34	#ifndef lint
ad787160 C	35	static char copyright[] =
	36	"@(#) Copyright (c) 1991, 1993\n\
	37	The Regents of the University of California. All rights reserved.\n";
be1dd919 KB	38	#endif /* not lint */
	39
	40	#ifndef lint
ad787160	41	static char sccsid[] = "@(#)id.c 8.1 (Berkeley) 6/6/93";
be1dd919 KB	42	#endif /* not lint */
	43
	44	#include <sys/param.h>
	45	#include <pwd.h>
	46	#include <grp.h>
	47	#include <errno.h>
	48	#include <unistd.h>
	49	#include <stdlib.h>
	50	#include <stdio.h>
	51	#include <string.h>
	52
be1dd919 KB	53	void current __P((void));
be1dd919 KB	54	void err __P((const char *, ...));
d500843c KB	55	void pretty __P((struct passwd *));
d500843c KB	56	void group __P((struct passwd *, int));
be1dd919	57	void usage __P((void));
d500843c KB	58	void user __P((struct passwd *));
	59	struct passwd *
	60	who __P((char *));
be1dd919	61
d500843c	62	int
be1dd919 KB	63	main(argc, argv)
	64	int argc;
	65	char *argv[];
	66	{
d500843c KB	67	struct group *gr;
	68	struct passwd *pw;
	69	int Gflag, ch, gflag, id, nflag, pflag, rflag, uflag;
be1dd919	70
d500843c KB	71	Gflag = gflag = nflag = pflag = rflag = uflag = 0;
d500843c KB	72	while ((ch = getopt(argc, argv, "Ggnpru")) != EOF)
be1dd919 KB	73	switch(ch) {
	74	case 'G':
	75	Gflag = 1;
	76	break;
	77	case 'g':
	78	gflag = 1;
	79	break;
	80	case 'n':
	81	nflag = 1;
	82	break;
d500843c KB	83	case 'p':
	84	pflag = 1;
	85	break;
be1dd919 KB	86	case 'r':
	87	rflag = 1;
	88	break;
	89	case 'u':
	90	uflag = 1;
	91	break;
	92	case '?':
	93	default:
	94	usage();
	95	}
	96	argc -= optind;
	97	argv += optind;
	98
d500843c	99	switch(Gflag + gflag + pflag + uflag) {
7ac05a89 KB	100	case 1:
	101	break;
	102	case 0:
	103	if (!nflag && !rflag)
	104	break;
	105	/* FALLTHROUGH */
	106	default:
be1dd919	107	usage();
7ac05a89	108	}
be1dd919	109
d500843c	110	pw = argv ? who(argv) : NULL;
be1dd919 KB	111
	112	if (gflag) {
	113	id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
d500843c	114	if (nflag && (gr = getgrgid(id)))
be1dd919	115	(void)printf("%s\n", gr->gr_name);
d500843c KB	116	else
d500843c KB	117	(void)printf("%u\n", id);
be1dd919 KB	118	exit(0);
	119	}
	120
	121	if (uflag) {
	122	id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
d500843c	123	if (nflag && (pw = getpwuid(id)))
be1dd919	124	(void)printf("%s\n", pw->pw_name);
d500843c KB	125	else
	126	(void)printf("%u\n", id);
	127	exit(0);
	128	}
	129
	130	if (Gflag) {
	131	group(pw, nflag);
	132	exit(0);
	133	}
	134
	135	if (pflag) {
	136	pretty(pw);
be1dd919 KB	137	exit(0);
	138	}
	139
	140	if (pw)
	141	user(pw);
	142	else
	143	current();
	144	exit(0);
	145	}
	146
	147	void
d500843c KB	148	pretty(pw)
d500843c KB	149	struct passwd *pw;
be1dd919	150	{
d500843c KB	151	struct group *gr;
	152	u_int eid, rid;
	153	char *login;
be1dd919	154
524408bd	155	if (pw) {
d500843c	156	(void)printf("uid\t%s\n", pw->pw_name);
524408bd KB	157	(void)printf("groups\t");
	158	group(pw, 1);
	159	} else {
d500843c KB	160	if ((login = getlogin()) == NULL)
	161	err("getlogin: %s", strerror(errno));
	162
	163	pw = getpwuid(rid = getuid());
	164	if (pw == NULL \|\| strcmp(login, pw->pw_name))
	165	(void)printf("login\t%s\n", login);
	166	if (pw)
	167	(void)printf("uid\t%s\n", pw->pw_name);
	168	else
	169	(void)printf("uid\t%u\n", rid);
	170
	171	if ((eid = geteuid()) != rid)
	172	if (pw = getpwuid(eid))
	173	(void)printf("euid\t%s", pw->pw_name);
be1dd919	174	else
d500843c KB	175	(void)printf("euid\t%u", eid);
	176	if ((rid = getgid()) != (eid = getegid()))
	177	if (gr = getgrgid(rid))
	178	(void)printf("rgid\t%s\n", gr->gr_name);
	179	else
	180	(void)printf("rgid\t%u\n", rid);
524408bd KB	181	(void)printf("groups\t");
524408bd KB	182	group(NULL, 1);
be1dd919	183	}
be1dd919 KB	184	}
	185
	186	void
	187	current()
	188	{
d500843c KB	189	struct group *gr;
d500843c KB	190	struct passwd *pw;
e157e33b	191	int cnt, id, eid, lastid, ngroups, groups[NGROUPS];
be1dd919 KB	192	char *fmt;
	193
	194	id = getuid();
	195	(void)printf("uid=%u", id);
	196	if (pw = getpwuid(id))
	197	(void)printf("(%s)", pw->pw_name);
	198	if ((eid = geteuid()) != id) {
	199	(void)printf(" euid=%u", eid);
	200	if (pw = getpwuid(eid))
	201	(void)printf("(%s)", pw->pw_name);
	202	}
	203	id = getgid();
	204	(void)printf(" gid=%u", id);
	205	if (gr = getgrgid(id))
	206	(void)printf("(%s)", gr->gr_name);
	207	if ((eid = getegid()) != id) {
	208	(void)printf(" egid=%u", eid);
	209	if (gr = getgrgid(eid))
	210	(void)printf("(%s)", gr->gr_name);
	211	}
	212	if (ngroups = getgroups(NGROUPS, groups)) {
e157e33b	213	for (fmt = " groups=%u", lastid = -1, cnt = 0; cnt < ngroups;
be1dd919	214	fmt = ", %u", lastid = id) {
e157e33b	215	id = groups[cnt++];
be1dd919 KB	216	if (lastid == id)
	217	continue;
	218	(void)printf(fmt, id);
	219	if (gr = getgrgid(id))
	220	(void)printf("(%s)", gr->gr_name);
	221	}
	222	}
	223	(void)printf("\n");
	224	}
	225
	226	void
	227	user(pw)
d500843c	228	register struct passwd *pw;
be1dd919	229	{
d500843c	230	register struct group *gr;
be1dd919	231	register char fmt, *p;
e157e33b	232	int cnt, id, lastid, ngroups, groups[NGROUPS + 1];
be1dd919 KB	233
	234	id = pw->pw_uid;
	235	(void)printf("uid=%u(%s)", id, pw->pw_name);
	236	(void)printf(" gid=%u", pw->pw_gid);
	237	if (gr = getgrgid(id))
	238	(void)printf("(%s)", gr->gr_name);
e157e33b KM	239	ngroups = NGROUPS + 1;
	240	(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
	241	fmt = " groups=%u";
	242	for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
	243	if (lastid == (id = groups[cnt]))
be1dd919	244	continue;
e157e33b KM	245	(void)printf(fmt, id);
	246	fmt = " %u";
	247	if (gr = getgrgid(id))
	248	(void)printf("(%s)", gr->gr_name);
	249	lastid = id;
be1dd919 KB	250	}
	251	(void)printf("\n");
	252	}
	253
d500843c KB	254	void
	255	group(pw, nflag)
	256	struct passwd *pw;
	257	int nflag;
	258	{
	259	struct group *gr;
524408bd	260	int cnt, id, lastid, ngroups, groups[NGROUPS + 1];
e157e33b	261	char *fmt;
d500843c	262
d500843c	263	if (pw) {
e157e33b KM	264	ngroups = NGROUPS + 1;
e157e33b KM	265	(void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
d500843c KB	266	} else {
	267	groups[0] = getgid();
	268	ngroups = getgroups(NGROUPS, groups + 1) + 1;
e157e33b KM	269	}
	270	fmt = nflag ? "%s" : "%u";
	271	for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
	272	if (lastid == (id = groups[cnt]))
	273	continue;
	274	if (nflag) {
	275	if (gr = getgrgid(id))
	276	(void)printf(fmt, gr->gr_name);
	277	else
	278	(void)printf(*fmt == ' ' ? " %u" : "%u",
	279	id);
	280	fmt = " %s";
	281	} else {
	282	(void)printf(fmt, id);
	283	fmt = " %u";
d500843c	284	}
e157e33b	285	lastid = id;
d500843c KB	286	}
	287	(void)printf("\n");
	288	}
	289
	290	struct passwd *
be1dd919 KB	291	who(u)
	292	char *u;
	293	{
d500843c	294	struct passwd *pw;
be1dd919 KB	295	long id;
	296	char *ep;
	297
	298	/*
	299	* Translate user argument into a pw pointer. First, try to
	300	* get it as specified. If that fails, try it as a number.
	301	*/
	302	if (pw = getpwnam(u))
	303	return(pw);
	304	id = strtol(u, &ep, 10);
	305	if (u && !ep && (pw = getpwuid(id)))
	306	return(pw);
	307	err("%s: No such user", u);
	308	/* NOTREACHED */
	309	}
	310
be1dd919 KB	311	#if __STDC__
	312	#include <stdarg.h>
	313	#else
	314	#include <varargs.h>
	315	#endif
	316
	317	void
	318	#if __STDC__
	319	err(const char *fmt, ...)
	320	#else
	321	err(fmt, va_alist)
	322	char *fmt;
	323	va_dcl
	324	#endif
	325	{
	326	va_list ap;
	327	#if __STDC__
	328	va_start(ap, fmt);
	329	#else
	330	va_start(ap);
	331	#endif
	332	(void)fprintf(stderr, "id: ");
	333	(void)vfprintf(stderr, fmt, ap);
	334	va_end(ap);
	335	(void)fprintf(stderr, "\n");
	336	exit(1);
	337	/* NOTREACHED */
	338	}
	339
	340	void
	341	usage()
	342	{
	343	(void)fprintf(stderr, "usage: id [user]\n");
	344	(void)fprintf(stderr, " id -G [-n] [user]\n");
	345	(void)fprintf(stderr, " id -g [-nr] [user]\n");
	346	(void)fprintf(stderr, " id -u [-nr] [user]\n");
	347	exit(1);
	348	}