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Annotation of embedaddon/sudo/plugins/sudoers/boottime.c, revision 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