Annotation of embedaddon/sudo/plugins/sudoers/boottime.c, revision 1.1.1.4
1.1 misho 1: /*
1.1.1.3 misho 2: * Copyright (c) 2009-2013 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 misho 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/types.h>
20: #include <sys/time.h>
21:
22: #include <stdio.h>
23: #ifdef STDC_HEADERS
24: # include <stdlib.h>
25: # include <stddef.h>
26: #else
27: # ifdef HAVE_STDLIB_H
28: # include <stdlib.h>
29: # endif
30: #endif /* STDC_HEADERS */
1.1.1.4 ! misho 31: #ifdef HAVE_STDBOOL_H
! 32: # include <stdbool.h>
! 33: #else
! 34: # include "compat/stdbool.h"
! 35: #endif /* HAVE_STDBOOL_H */
1.1 misho 36: #ifdef HAVE_STRING_H
37: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
38: # include <memory.h>
39: # endif
40: # include <string.h>
41: #endif /* HAVE_STRING_H */
42: #ifdef HAVE_STRINGS_H
43: # include <strings.h>
44: #endif /* HAVE_STRINGS_H */
45: #include <limits.h>
1.1.1.4 ! misho 46: #ifdef TIME_WITH_SYS_TIME
1.1 misho 47: # include <time.h>
48: #endif
49: #ifndef __linux__
50: # if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
51: # include <sys/sysctl.h>
52: # elif defined(HAVE_GETUTXID)
53: # include <utmpx.h>
54: # elif defined(HAVE_GETUTID)
55: # include <utmp.h>
56: # endif
57: #endif /* !__linux__ */
58:
59: #include "missing.h"
1.1.1.2 misho 60: #include "sudo_debug.h"
1.1 misho 61:
62: /*
63: * Fill in a struct timeval with the time the system booted.
64: * Returns 1 on success and 0 on failure.
65: */
66:
67: #if defined(__linux__)
1.1.1.4 ! misho 68: bool
1.1 misho 69: get_boottime(struct timeval *tv)
70: {
1.1.1.3 misho 71: char *ep, *line = NULL;
1.1 misho 72: size_t linesize = 0;
1.1.1.4 ! misho 73: bool found = false;
1.1 misho 74: ssize_t len;
1.1.1.4 ! misho 75: FILE *fp;
1.1.1.2 misho 76: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 77:
78: /* read btime from /proc/stat */
79: fp = fopen("/proc/stat", "r");
80: if (fp != NULL) {
81: while ((len = getline(&line, &linesize, fp)) != -1) {
82: if (strncmp(line, "btime ", 6) == 0) {
1.1.1.4 ! misho 83: long long llval = strtonum(line + 6, 1, LLONG_MAX, NULL);
! 84: if (llval > 0) {
1.1.1.3 misho 85: tv->tv_sec = (time_t)llval;
86: tv->tv_usec = 0;
1.1.1.4 ! misho 87: found = true;
! 88: break;
1.1.1.3 misho 89: }
1.1 misho 90: }
91: }
92: fclose(fp);
93: free(line);
94: }
95:
1.1.1.4 ! misho 96: debug_return_bool(found);
1.1 misho 97: }
98:
99: #elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
100:
1.1.1.4 ! misho 101: bool
1.1 misho 102: get_boottime(struct timeval *tv)
103: {
104: size_t size;
105: int mib[2];
1.1.1.2 misho 106: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 107:
108: mib[0] = CTL_KERN;
109: mib[1] = KERN_BOOTTIME;
110: size = sizeof(*tv);
111: if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
1.1.1.4 ! misho 112: debug_return_bool(true);
1.1 misho 113:
1.1.1.4 ! misho 114: debug_return_bool(false);
1.1 misho 115: }
116:
117: #elif defined(HAVE_GETUTXID)
118:
119: int
120: get_boottime(struct timeval *tv)
121: {
122: struct utmpx *ut, key;
1.1.1.2 misho 123: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 124:
125: memset(&key, 0, sizeof(key));
126: key.ut_type = BOOT_TIME;
127: setutxent();
128: if ((ut = getutxid(&key)) != NULL) {
129: tv->tv_sec = ut->ut_tv.tv_sec;
130: tv->tv_usec = ut->ut_tv.tv_usec;
131: }
132: endutxent();
1.1.1.2 misho 133: debug_return_bool(ut != NULL);
1.1 misho 134: }
135:
136: #elif defined(HAVE_GETUTID)
137:
138: int
139: get_boottime(struct timeval *tv)
140: {
141: struct utmp *ut, key;
1.1.1.2 misho 142: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1 misho 143:
144: memset(&key, 0, sizeof(key));
145: key.ut_type = BOOT_TIME;
146: setutent();
147: if ((ut = getutid(&key)) != NULL) {
148: tv->tv_sec = ut->ut_time;
149: tv->tv_usec = 0;
150: }
151: endutent();
1.1.1.2 misho 152: debug_return_bool(ut != NULL);
1.1 misho 153: }
154:
155: #else
156:
157: int
158: get_boottime(struct timeval *tv)
159: {
1.1.1.2 misho 160: debug_decl(get_boottime, SUDO_DEBUG_UTIL)
1.1.1.4 ! misho 161: debug_return_bool(false);
1.1 misho 162: }
163: #endif
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