1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2011-2012 Ed Schouten <[email protected]>
5 * 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/time.h>
33 #include <errno.h>
34 #include <ctype.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <utmpx.h>
39
40 static int
b16_pton(const char * in,char * out,size_t len)41 b16_pton(const char *in, char *out, size_t len)
42 {
43 size_t i;
44
45 for (i = 0; i < len * 2; i++)
46 if (!isxdigit((unsigned char)in[i]))
47 return (1);
48 for (i = 0; i < len; i++)
49 sscanf(&in[i * 2], "%02hhx", &out[i]);
50 return (0);
51 }
52
53 static int
rm(char * id[])54 rm(char *id[])
55 {
56 struct utmpx utx = { .ut_type = DEAD_PROCESS };
57 size_t len;
58 int ret = 0;
59
60 (void)gettimeofday(&utx.ut_tv, NULL);
61 for (; *id != NULL; id++) {
62 len = strlen(*id);
63 if (len <= sizeof(utx.ut_id)) {
64 /* Identifier as string. */
65 strncpy(utx.ut_id, *id, sizeof(utx.ut_id));
66 } else if (len != sizeof(utx.ut_id) * 2 ||
67 b16_pton(*id, utx.ut_id, sizeof(utx.ut_id)) != 0) {
68 /* Also not hexadecimal. */
69 fprintf(stderr, "%s: Invalid identifier format\n", *id);
70 ret = 1;
71 continue;
72 }
73
74 /* Zap the entry. */
75 if (pututxline(&utx) == NULL) {
76 perror(*id);
77 ret = 1;
78 }
79 }
80 return (ret);
81 }
82
83 static int
boot(short type)84 boot(short type)
85 {
86 struct utmpx utx = { .ut_type = type };
87
88 (void)gettimeofday(&utx.ut_tv, NULL);
89 if (pututxline(&utx) == NULL) {
90 perror("pututxline");
91 return (1);
92 }
93 return (0);
94 }
95
96 int
main(int argc,char * argv[])97 main(int argc, char *argv[])
98 {
99
100 if (argc == 2 && strcmp(argv[1], "boot") == 0)
101 return (boot(BOOT_TIME));
102 else if (argc == 2 && strcmp(argv[1], "shutdown") == 0)
103 return (boot(SHUTDOWN_TIME));
104 else if (argc >= 3 && strcmp(argv[1], "rm") == 0)
105 return (rm(&argv[2]));
106
107 fprintf(stderr,
108 "usage: utx boot\n"
109 " utx shutdown\n"
110 " utx rm identifier ...\n");
111 exit(1);
112 }
113