1 /* $NetBSD: users.c,v 1.10 2002/08/01 23:51:20 christos 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 1.10 2002/08/01 23:51:20 christos Exp $"); 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 51 #include <err.h> 52 #include <time.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <unistd.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "utmpentry.h" 60 61 int main __P((int, char **)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char **argv; 67 { 68 int ncnt = 0; 69 int ch; 70 struct utmpentry *from, *ehead, *save, **nextp; 71 72 while ((ch = getopt(argc, argv, "")) != -1) 73 switch(ch) { 74 case '?': 75 default: 76 (void)fprintf(stderr, "Usage: %s\n", getprogname()); 77 exit(1); 78 } 79 argc -= optind; 80 argv += optind; 81 82 ncnt = getutentries(NULL, &ehead); 83 84 if (ncnt == 0) 85 return 0; 86 87 from = ehead; 88 ehead = NULL; 89 while (from != NULL) { 90 for (nextp = &ehead; 91 (*nextp) && strcmp(from->name, (*nextp)->name) > 0; 92 nextp = &(*nextp)->next) 93 continue; 94 save = from; 95 from = from->next; 96 save->next = *nextp; 97 *nextp = save; 98 } 99 100 save = ehead; 101 (void)printf("%s", ehead->name); 102 103 for (from = ehead->next; from; from = from->next) 104 if (strcmp(save->name, from->name) != 0) { 105 (void)printf(" %s", from->name); 106 save = from; 107 } 108 109 (void)printf("\n"); 110 exit(0); 111 } 112