1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1996 John M. Vinopal 5 * Copyright (c) 2018 Philip Paeps 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed for the NetBSD Project 19 * by John M. Vinopal. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * 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 __RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $"); 39 #endif 40 41 #include <err.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <time.h> 46 #include <unistd.h> 47 #include <utmpx.h> 48 49 #include <libxo/xo.h> 50 51 int main(int, char **); 52 static void output(struct utmpx *); 53 static void usage(void); 54 static int utcmp_user(const void *, const void *); 55 56 static int order = 1; 57 static const char *file = NULL; 58 static int (*utcmp)(const void *, const void *) = utcmp_user; 59 60 static int 61 utcmp_user(const void *u1, const void *u2) 62 { 63 64 return (order * strcmp(((const struct utmpx *)u1)->ut_user, 65 ((const struct utmpx *)u2)->ut_user)); 66 } 67 68 static int 69 utcmp_time(const void *u1, const void *u2) 70 { 71 time_t t1, t2; 72 73 t1 = ((const struct utmpx *)u1)->ut_tv.tv_sec; 74 t2 = ((const struct utmpx *)u2)->ut_tv.tv_sec; 75 return (t1 < t2 ? order : t1 > t2 ? -order : 0); 76 } 77 78 int 79 main(int argc, char *argv[]) 80 { 81 int ch, i, ulistsize; 82 struct utmpx *u, *ulist; 83 84 argc = xo_parse_args(argc, argv); 85 if (argc < 0) 86 exit(1); 87 88 while ((ch = getopt(argc, argv, "f:rt")) != -1) { 89 switch (ch) { 90 case 'f': 91 file = optarg; 92 break; 93 case 'r': 94 order = -1; 95 break; 96 case 't': 97 utcmp = utcmp_time; 98 break; 99 default: 100 usage(); 101 } 102 } 103 argc -= optind; 104 argv += optind; 105 106 xo_open_container("lastlogin-information"); 107 xo_open_list("lastlogin"); 108 109 if (argc > 0) { 110 /* Process usernames given on the command line. */ 111 for (i = 0; i < argc; i++) { 112 if (setutxdb(UTXDB_LASTLOGIN, file) != 0) 113 xo_err(1, "failed to open lastlog database"); 114 if ((u = getutxuser(argv[i])) == NULL) { 115 xo_warnx("user '%s' not found", argv[i]); 116 continue; 117 } 118 output(u); 119 endutxent(); 120 } 121 } else { 122 /* Read all lastlog entries, looking for active ones. */ 123 if (setutxdb(UTXDB_LASTLOGIN, file) != 0) 124 xo_err(1, "failed to open lastlog database"); 125 ulist = NULL; 126 ulistsize = 0; 127 while ((u = getutxent()) != NULL) { 128 if (u->ut_type != USER_PROCESS) 129 continue; 130 if ((ulistsize % 16) == 0) { 131 ulist = realloc(ulist, 132 (ulistsize + 16) * sizeof(struct utmpx)); 133 if (ulist == NULL) 134 xo_err(1, "malloc"); 135 } 136 ulist[ulistsize++] = *u; 137 } 138 endutxent(); 139 140 qsort(ulist, ulistsize, sizeof(struct utmpx), utcmp); 141 for (i = 0; i < ulistsize; i++) 142 output(&ulist[i]); 143 } 144 145 xo_close_list("lastlogin"); 146 xo_close_container("lastlogin-information"); 147 xo_finish(); 148 149 exit(0); 150 } 151 152 /* Duplicate the output of last(1) */ 153 static void 154 output(struct utmpx *u) 155 { 156 time_t t = u->ut_tv.tv_sec; 157 158 xo_open_instance("lastlogin"); 159 xo_emit("{:user/%-10s/%s} {:tty/%-8s/%s} {:from/%-22.22s/%s}", 160 u->ut_user, u->ut_line, u->ut_host); 161 xo_attr("seconds", "%lu", (unsigned long)t); 162 xo_emit(" {:login-time/%.24s/%.24s}\n", ctime(&t)); 163 xo_close_instance("lastlogin"); 164 } 165 166 static void 167 usage(void) 168 { 169 xo_error("usage: lastlogin [-f file] [-rt] [user ...]\n"); 170 xo_finish(); 171 exit(1); 172 } 173