[apple/shell_cmds.git] / users / users.c

/*	$NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $	*/

/*
 * Copyright (c) 1980, 1987, 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.
 */

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1993\n\
	The Regents of the University of California.  All rights reserved.\n");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)users.c	8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $");
#endif /* not lint */

#include <sys/types.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <unistd.h>
#include <utmpx.h>

typedef char	namebuf[_UTX_USERSIZE];

int	main __P((int, char **));
int scmp __P((const void *, const void *));

int
main(argc, argv)
	int argc;
	char **argv;
{
	namebuf *names = NULL;
	int ncnt = 0;
	int nmax = 0;
	int cnt;
	struct utmpx *ux;
	int ch;

	while ((ch = getopt(argc, argv, "")) != -1)
		switch(ch) {
		case '?':
		default:
			(void)fprintf(stderr, "usage: users\n");
			exit(1);
		}
	argc -= optind;
	argv += optind;

	setutxent();

	while ((ux = getutxent()) != NULL) {
		if (*ux->ut_user && ux->ut_type == USER_PROCESS)
		{
			if (ncnt >= nmax) {
				nmax += 32;
				names = realloc(names, 
					sizeof (*names) * nmax);

				if (!names) {
					err(1, "realloc");
					/* NOTREACHED */
				}
			}

			(void)strncpy(names[ncnt], ux->ut_user, _UTX_USERSIZE);
			++ncnt;
		}
	}

	if (ncnt) {
		qsort(names, ncnt, _UTX_USERSIZE, scmp);
		(void)printf("%.*s", _UTX_USERSIZE, names[0]);
		for (cnt = 1; cnt < ncnt; ++cnt)
			if (strncmp(names[cnt], names[cnt - 1], _UTX_USERSIZE))
				(void)printf(" %.*s", _UTX_USERSIZE, names[cnt]);
		(void)printf("\n");
	}
	exit(0);
}

int
scmp(p, q)
	const void *p, *q;
{
	return(strncmp((char *) p, (char *) q, _UTX_USERSIZE));
}
Commit	Line	Data
44bd5ea7 A	1	/* $NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $ */
	2
	3	/*
	4	* Copyright (c) 1980, 1987, 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. All advertising materials mentioning features or use of this software
	16	* must display the following acknowledgement:
	17	* This product includes software developed by the University of
	18	* California, Berkeley and its contributors.
	19	* 4. Neither the name of the University nor the names of its contributors
	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
	36	#include <sys/cdefs.h>
	37	#ifndef lint
	38	__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1993\n\
	39	The Regents of the University of California. All rights reserved.\n");
	40	#endif /* not lint */
	41
	42	#ifndef lint
	43	#if 0
	44	static char sccsid[] = "@(#)users.c 8.1 (Berkeley) 6/6/93";
	45	#endif
	46	__RCSID("$NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $");
	47	#endif /* not lint */
	48
	49	#include <sys/types.h>
	50
	51	#include <err.h>
	52	#include <stdio.h>
	53	#include <stdlib.h>
	54	#include <unistd.h>
	55	#include <string.h>
	56	#include <unistd.h>
e1a085ba	57	#include <utmpx.h>
44bd5ea7	58
e1a085ba	59	typedef char namebuf[_UTX_USERSIZE];
44bd5ea7 A	60
	61	int main __P((int, char **));
	62	int scmp __P((const void , const void ));
	63
	64	int
	65	main(argc, argv)
	66	int argc;
	67	char **argv;
	68	{
	69	namebuf *names = NULL;
	70	int ncnt = 0;
	71	int nmax = 0;
	72	int cnt;
e1a085ba	73	struct utmpx *ux;
44bd5ea7 A	74	int ch;
	75
	76	while ((ch = getopt(argc, argv, "")) != -1)
	77	switch(ch) {
	78	case '?':
	79	default:
	80	(void)fprintf(stderr, "usage: users\n");
	81	exit(1);
	82	}
	83	argc -= optind;
	84	argv += optind;
	85
e1a085ba	86	setutxent();
44bd5ea7	87
e1a085ba A	88	while ((ux = getutxent()) != NULL) {
	89	if (*ux->ut_user && ux->ut_type == USER_PROCESS)
	90	{
44bd5ea7 A	91	if (ncnt >= nmax) {
	92	nmax += 32;
	93	names = realloc(names,
	94	sizeof (names) nmax);
	95
	96	if (!names) {
	97	err(1, "realloc");
	98	/* NOTREACHED */
	99	}
	100	}
	101
e1a085ba	102	(void)strncpy(names[ncnt], ux->ut_user, _UTX_USERSIZE);
44bd5ea7 A	103	++ncnt;
	104	}
	105	}
	106
	107	if (ncnt) {
e1a085ba A	108	qsort(names, ncnt, _UTX_USERSIZE, scmp);
e1a085ba A	109	(void)printf("%.*s", _UTX_USERSIZE, names[0]);
44bd5ea7	110	for (cnt = 1; cnt < ncnt; ++cnt)
e1a085ba A	111	if (strncmp(names[cnt], names[cnt - 1], _UTX_USERSIZE))
e1a085ba A	112	(void)printf(" %.*s", _UTX_USERSIZE, names[cnt]);
44bd5ea7 A	113	(void)printf("\n");
	114	}
	115	exit(0);
	116	}
	117
	118	int
	119	scmp(p, q)
	120	const void p, q;
	121	{
e1a085ba	122	return(strncmp((char ) p, (char ) q, _UTX_USERSIZE));
44bd5ea7	123	}