Annotation of embedaddon/sudo/plugins/sudoers/boottime.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 2009-2011 Todd C. Miller <Todd.Miller@courtesan.com>
3: *
4: * Permission to use, copy, modify, and distribute this software for any
5: * purpose with or without fee is hereby granted, provided that the above
6: * copyright notice and this permission notice appear in all copies.
7: *
8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15: */
16:
17: #include <config.h>
18:
19: #include <sys/param.h>
20: #include <sys/types.h>
21: #include <sys/time.h>
22:
23: #include <stdio.h>
24: #ifdef STDC_HEADERS
25: # include <stdlib.h>
26: # include <stddef.h>
27: #else
28: # ifdef HAVE_STDLIB_H
29: # include <stdlib.h>
30: # endif
31: #endif /* STDC_HEADERS */
32: #ifdef HAVE_STRING_H
33: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
34: # include <memory.h>
35: # endif
36: # include <string.h>
37: #endif /* HAVE_STRING_H */
38: #ifdef HAVE_STRINGS_H
39: # include <strings.h>
40: #endif /* HAVE_STRINGS_H */
41: #include <limits.h>
42: #if TIME_WITH_SYS_TIME
43: # include <time.h>
44: #endif
45: #ifndef __linux__
46: # if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
47: # include <sys/sysctl.h>
48: # elif defined(HAVE_GETUTXID)
49: # include <utmpx.h>
50: # elif defined(HAVE_GETUTID)
51: # include <utmp.h>
52: # endif
53: #endif /* !__linux__ */
54:
55: #include "missing.h"
56:
57: /*
58: * Fill in a struct timeval with the time the system booted.
59: * Returns 1 on success and 0 on failure.
60: */
61:
62: #if defined(__linux__)
63: int
64: get_boottime(struct timeval *tv)
65: {
66: char *line = NULL;
67: size_t linesize = 0;
68: ssize_t len;
69: FILE * fp;
70:
71: /* read btime from /proc/stat */
72: fp = fopen("/proc/stat", "r");
73: if (fp != NULL) {
74: while ((len = getline(&line, &linesize, fp)) != -1) {
75: if (strncmp(line, "btime ", 6) == 0) {
76: tv->tv_sec = atoi(line + 6);
77: tv->tv_usec = 0;
78: return 1;
79: }
80: }
81: fclose(fp);
82: free(line);
83: }
84:
85: return 0;
86: }
87:
88: #elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
89:
90: int
91: get_boottime(struct timeval *tv)
92: {
93: size_t size;
94: int mib[2];
95:
96: mib[0] = CTL_KERN;
97: mib[1] = KERN_BOOTTIME;
98: size = sizeof(*tv);
99: if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
100: return 1;
101:
102: return 0;
103: }
104:
105: #elif defined(HAVE_GETUTXID)
106:
107: int
108: get_boottime(struct timeval *tv)
109: {
110: struct utmpx *ut, key;
111:
112: memset(&key, 0, sizeof(key));
113: key.ut_type = BOOT_TIME;
114: setutxent();
115: if ((ut = getutxid(&key)) != NULL) {
116: tv->tv_sec = ut->ut_tv.tv_sec;
117: tv->tv_usec = ut->ut_tv.tv_usec;
118: }
119: endutxent();
120: return ut != NULL;
121: }
122:
123: #elif defined(HAVE_GETUTID)
124:
125: int
126: get_boottime(struct timeval *tv)
127: {
128: struct utmp *ut, key;
129:
130: memset(&key, 0, sizeof(key));
131: key.ut_type = BOOT_TIME;
132: setutent();
133: if ((ut = getutid(&key)) != NULL) {
134: tv->tv_sec = ut->ut_time;
135: tv->tv_usec = 0;
136: }
137: endutent();
138: return ut != NULL;
139: }
140:
141: #else
142:
143: int
144: get_boottime(struct timeval *tv)
145: {
146: return 0;
147: }
148: #endif
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