163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/*
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* Copyright (c) 2009-2014 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#else
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# include "compat/stdbool.h"
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#endif /* HAVE_STDBOOL_H */
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#ifdef HAVE_STRING_H
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# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
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# include <memory.h>
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# endif
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <limits.h>
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#ifdef TIME_WITH_SYS_TIME
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# include <time.h>
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#endif
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#ifndef __linux__
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# if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
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# include <sys/sysctl.h>
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# elif defined(HAVE_GETUTXID)
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# include <utmpx.h>
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# elif defined(HAVE_GETUTID)
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# include <utmp.h>
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# endif
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#endif /* !__linux__ */
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#include "sudoers.h"
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/*
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* Fill in a struct timeval with the time the system booted.
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* Returns 1 on success and 0 on failure.
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*/
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#if defined(__linux__)
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bool
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get_boottime(struct timeval *tv)
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{
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char *line = NULL;
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size_t linesize = 0;
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bool found = false;
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ssize_t len;
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FILE *fp;
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debug_decl(get_boottime, SUDOERS_DEBUG_UTIL, sudoers_debug_instance)
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/* read btime from /proc/stat */
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fp = fopen("/proc/stat", "r");
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if (fp != NULL) {
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while ((len = getline(&line, &linesize, fp)) != -1) {
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if (strncmp(line, "btime ", 6) == 0) {
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long long llval = strtonum(line + 6, 1, LLONG_MAX, NULL);
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if (llval > 0) {
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tv->tv_sec = (time_t)llval;
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tv->tv_usec = 0;
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found = true;
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break;
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}
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}
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}
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fclose(fp);
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free(line);
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}
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debug_return_bool(found);
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}
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#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
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bool
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get_boottime(struct timeval *tv)
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{
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size_t size;
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int mib[2];
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debug_decl(get_boottime, SUDOERS_DEBUG_UTIL, sudoers_debug_instance)
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mib[0] = CTL_KERN;
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mib[1] = KERN_BOOTTIME;
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size = sizeof(*tv);
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if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
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debug_return_bool(true);
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debug_return_bool(false);
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}
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#elif defined(HAVE_GETUTXID)
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bool
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get_boottime(struct timeval *tv)
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{
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struct utmpx *ut, key;
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debug_decl(get_boottime, SUDOERS_DEBUG_UTIL, sudoers_debug_instance)
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memset(&key, 0, sizeof(key));
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key.ut_type = BOOT_TIME;
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setutxent();
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if ((ut = getutxid(&key)) != NULL) {
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tv->tv_sec = ut->ut_tv.tv_sec;
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tv->tv_usec = ut->ut_tv.tv_usec;
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}
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endutxent();
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debug_return_bool(ut != NULL);
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}
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#elif defined(HAVE_GETUTID)
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bool
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get_boottime(struct timeval *tv)
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{
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struct utmp *ut, key;
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debug_decl(get_boottime, SUDOERS_DEBUG_UTIL, sudoers_debug_instance)
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memset(&key, 0, sizeof(key));
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key.ut_type = BOOT_TIME;
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setutent();
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if ((ut = getutid(&key)) != NULL) {
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tv->tv_sec = ut->ut_time;
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tv->tv_usec = 0;
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}
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endutent();
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debug_return_bool(ut != NULL);
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}
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#else
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bool
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get_boottime(struct timeval *tv)
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{
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debug_decl(get_boottime, SUDOERS_DEBUG_UTIL, sudoers_debug_instance)
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debug_return_bool(false);
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}
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#endif
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