Annotation of embedaddon/sudo/plugins/sudoers/boottime.c, revision 1.1.1.2
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"
1.1.1.2 ! misho 56: #include "sudo_debug.h"
1.1 misho 57:
58: /*
59: * Fill in a struct timeval with the time the system booted.
60: * Returns 1 on success and 0 on failure.
61: */
62:
63: #if defined(__linux__)
64: int
65: get_boottime(struct timeval *tv)
66: {
67: char *line = NULL;
68: size_t linesize = 0;
69: ssize_t len;
70: FILE * fp;
1.1.1.2 ! misho 71: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 72:
73: /* read btime from /proc/stat */
74: fp = fopen("/proc/stat", "r");
75: if (fp != NULL) {
76: while ((len = getline(&line, &linesize, fp)) != -1) {
77: if (strncmp(line, "btime ", 6) == 0) {
78: tv->tv_sec = atoi(line + 6);
79: tv->tv_usec = 0;
1.1.1.2 ! misho 80: debug_return_bool(1);
1.1 misho 81: }
82: }
83: fclose(fp);
84: free(line);
85: }
86:
1.1.1.2 ! misho 87: debug_return_bool(0);
1.1 misho 88: }
89:
90: #elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
91:
92: int
93: get_boottime(struct timeval *tv)
94: {
95: size_t size;
96: int mib[2];
1.1.1.2 ! misho 97: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 98:
99: mib[0] = CTL_KERN;
100: mib[1] = KERN_BOOTTIME;
101: size = sizeof(*tv);
102: if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
1.1.1.2 ! misho 103: debug_return_bool(1);
1.1 misho 104:
1.1.1.2 ! misho 105: debug_return_bool(0);
1.1 misho 106: }
107:
108: #elif defined(HAVE_GETUTXID)
109:
110: int
111: get_boottime(struct timeval *tv)
112: {
113: struct utmpx *ut, key;
1.1.1.2 ! misho 114: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 115:
116: memset(&key, 0, sizeof(key));
117: key.ut_type = BOOT_TIME;
118: setutxent();
119: if ((ut = getutxid(&key)) != NULL) {
120: tv->tv_sec = ut->ut_tv.tv_sec;
121: tv->tv_usec = ut->ut_tv.tv_usec;
122: }
123: endutxent();
1.1.1.2 ! misho 124: debug_return_bool(ut != NULL);
1.1 misho 125: }
126:
127: #elif defined(HAVE_GETUTID)
128:
129: int
130: get_boottime(struct timeval *tv)
131: {
132: struct utmp *ut, key;
1.1.1.2 ! misho 133: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 134:
135: memset(&key, 0, sizeof(key));
136: key.ut_type = BOOT_TIME;
137: setutent();
138: if ((ut = getutid(&key)) != NULL) {
139: tv->tv_sec = ut->ut_time;
140: tv->tv_usec = 0;
141: }
142: endutent();
1.1.1.2 ! misho 143: debug_return_bool(ut != NULL);
1.1 misho 144: }
145:
146: #else
147:
148: int
149: get_boottime(struct timeval *tv)
150: {
1.1.1.2 ! misho 151: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
! 152: debug_return_bool(0);
1.1 misho 153: }
154: #endif
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