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/*
* Copyright (c) 2009-2013 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif /* HAVE_STDBOOL_H */
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <limits.h>
#ifdef TIME_WITH_SYS_TIME
# include <time.h>
#endif
#ifndef __linux__
# if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
# include <sys/sysctl.h>
# elif defined(HAVE_GETUTXID)
# include <utmpx.h>
# elif defined(HAVE_GETUTID)
# include <utmp.h>
# endif
#endif /* !__linux__ */
#include "missing.h"
#include "sudo_debug.h"
/*
* Fill in a struct timeval with the time the system booted.
* Returns 1 on success and 0 on failure.
*/
#if defined(__linux__)
bool
get_boottime(struct timeval *tv)
{
char *ep, *line = NULL;
size_t linesize = 0;
bool found = false;
ssize_t len;
FILE *fp;
debug_decl(get_boottime, SUDO_DEBUG_UTIL)
/* read btime from /proc/stat */
fp = fopen("/proc/stat", "r");
if (fp != NULL) {
while ((len = getline(&line, &linesize, fp)) != -1) {
if (strncmp(line, "btime ", 6) == 0) {
if (line[len - 1] == '\n')
line[len - 1] = '\0';
long long llval = strtonum(line + 6, 1, LLONG_MAX, NULL);
if (llval > 0) {
tv->tv_sec = (time_t)llval;
tv->tv_usec = 0;
found = true;
break;
}
}
}
fclose(fp);
free(line);
}
debug_return_bool(found);
}
#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
bool
get_boottime(struct timeval *tv)
{
size_t size;
int mib[2];
debug_decl(get_boottime, SUDO_DEBUG_UTIL)
mib[0] = CTL_KERN;
mib[1] = KERN_BOOTTIME;
size = sizeof(*tv);
if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
debug_return_bool(true);
debug_return_bool(false);
}
#elif defined(HAVE_GETUTXID)
int
get_boottime(struct timeval *tv)
{
struct utmpx *ut, key;
debug_decl(get_boottime, SUDO_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutxent();
if ((ut = getutxid(&key)) != NULL) {
tv->tv_sec = ut->ut_tv.tv_sec;
tv->tv_usec = ut->ut_tv.tv_usec;
}
endutxent();
debug_return_bool(ut != NULL);
}
#elif defined(HAVE_GETUTID)
int
get_boottime(struct timeval *tv)
{
struct utmp *ut, key;
debug_decl(get_boottime, SUDO_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutent();
if ((ut = getutid(&key)) != NULL) {
tv->tv_sec = ut->ut_time;
tv->tv_usec = 0;
}
endutent();
debug_return_bool(ut != NULL);
}
#else
int
get_boottime(struct timeval *tv)
{
debug_decl(get_boottime, SUDO_DEBUG_UTIL)
debug_return_bool(false);
}
#endif
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