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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