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 44static 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> 57#include <utmpx.h> 58 59typedef char namebuf[_UTX_USERSIZE]; 60 61int main __P((int, char **)); 62int scmp __P((const void *, const void *)); 63 64int 65main(argc, argv) 66 int argc; 67 char **argv; 68{ 69 namebuf *names = NULL; 70 int ncnt = 0; 71 int nmax = 0; 72 int cnt; 73 struct utmpx *ux; 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 86 setutxent(); 87 88 while ((ux = getutxent()) != NULL) { 89 if (*ux->ut_user && ux->ut_type == USER_PROCESS) 90 { 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 } 101 102 (void)strncpy(names[ncnt], ux->ut_user, _UTX_USERSIZE); 103 ++ncnt; 104 } 105 } 106 107 if (ncnt) { 108 qsort(names, ncnt, _UTX_USERSIZE, scmp); 109 (void)printf("%.*s", _UTX_USERSIZE, names[0]); 110 for (cnt = 1; cnt < ncnt; ++cnt) 111 if (strncmp(names[cnt], names[cnt - 1], _UTX_USERSIZE)) 112 (void)printf(" %.*s", _UTX_USERSIZE, names[cnt]); 113 (void)printf("\n"); 114 } 115 exit(0); 116} 117 118int 119scmp(p, q) 120 const void *p, *q; 121{ 122 return(strncmp((char *) p, (char *) q, _UTX_USERSIZE)); 123} 124