1 /*- 2 * Copyright (c) 2011-2012 Ed Schouten <ed@FreeBSD.org> 3 * All rights reserved. 4 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/time.h> 31 #include <errno.h> 32 #include <ctype.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <utmpx.h> 37 38 static int 39 b16_pton(const char *in, char *out, size_t len) 40 { 41 size_t i; 42 43 for (i = 0; i < len * 2; i++) 44 if (!isxdigit((unsigned char)in[i])) 45 return (1); 46 for (i = 0; i < len; i++) 47 sscanf(&in[i * 2], "%02hhx", &out[i]); 48 return (0); 49 } 50 51 static int 52 rm(char *id[]) 53 { 54 struct utmpx utx = { .ut_type = DEAD_PROCESS }; 55 size_t len; 56 int ret = 0; 57 58 (void)gettimeofday(&utx.ut_tv, NULL); 59 for (; *id != NULL; id++) { 60 len = strlen(*id); 61 if (len <= sizeof(utx.ut_id)) { 62 /* Identifier as string. */ 63 strncpy(utx.ut_id, *id, sizeof(utx.ut_id)); 64 } else if (len != sizeof(utx.ut_id) * 2 || 65 b16_pton(*id, utx.ut_id, sizeof(utx.ut_id)) != 0) { 66 /* Also not hexadecimal. */ 67 fprintf(stderr, "%s: Invalid identifier format\n", *id); 68 ret = 1; 69 continue; 70 } 71 72 /* Zap the entry. */ 73 if (pututxline(&utx) == NULL) { 74 perror(*id); 75 ret = 1; 76 } 77 } 78 return (ret); 79 } 80 81 static int 82 boot(short type) 83 { 84 struct utmpx utx = { .ut_type = type }; 85 86 (void)gettimeofday(&utx.ut_tv, NULL); 87 if (pututxline(&utx) == NULL) { 88 perror("pututxline"); 89 return (1); 90 } 91 return (0); 92 } 93 94 int 95 main(int argc, char *argv[]) 96 { 97 98 if (argc >= 2 && strcmp(getprogname(), "utxrm") == 0) 99 /* For compatibility. */ 100 return (rm(&argv[1])); 101 else if (argc == 2 && strcmp(argv[1], "boot") == 0) 102 return (boot(BOOT_TIME)); 103 else if (argc == 2 && strcmp(argv[1], "shutdown") == 0) 104 return (boot(SHUTDOWN_TIME)); 105 else if (argc >= 3 && strcmp(argv[1], "rm") == 0) 106 return (rm(&argv[2])); 107 108 fprintf(stderr, 109 "usage: utx boot\n" 110 " utx shutdown\n" 111 " utx rm identifier ...\n" 112 " utxrm identifier ...\n"); 113 exit(1); 114 } 115