#include <config.h>
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <errno.h>
#include <limits.h>
#include <time.h>
#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
#include "sudoers.h"
#if defined(__linux__)
bool
get_boottime(struct timespec *ts)
{
char *line = NULL;
size_t linesize = 0;
bool found = false;
long long llval;
ssize_t len;
FILE *fp;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
fp = fopen("/proc/stat", "r");
if (fp != NULL) {
while ((len = getdelim(&line, &linesize, '\n', fp)) != -1) {
if (strncmp(line, "btime ", 6) == 0) {
if (line[len - 1] == '\n')
line[len - 1] = '\0';
llval = sudo_strtonum(line + 6, 1, LLONG_MAX, NULL);
if (llval > 0) {
ts->tv_sec = (time_t)llval;
ts->tv_nsec = 0;
found = true;
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"found btime in /proc/stat: %lld", llval);
break;
} else {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid btime in /proc/stat: %s", line);
}
}
}
fclose(fp);
free(line);
}
debug_return_bool(found);
}
#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
bool
get_boottime(struct timespec *ts)
{
size_t size;
int mib[2];
struct timeval tv;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
mib[0] = CTL_KERN;
mib[1] = KERN_BOOTTIME;
size = sizeof(tv);
if (sysctl(mib, 2, &tv, &size, NULL, 0) != -1) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"KERN_BOOTTIME: %lld, %ld", (long long)tv.tv_sec, (long)tv.tv_usec);
TIMEVAL_TO_TIMESPEC(&tv, ts);
debug_return_bool(true);
}
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"KERN_BOOTTIME: %s", strerror(errno));
debug_return_bool(false);
}
#elif defined(HAVE_GETUTXID)
bool
get_boottime(struct timespec *ts)
{
struct utmpx *ut, key;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutxent();
if ((ut = getutxid(&key)) != NULL) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"BOOT_TIME: %lld, %ld", (long long)ut->ut_tv.tv_sec,
(long)ut->ut_tv.tv_usec);
TIMEVAL_TO_TIMESPEC(&ut->ut_tv, ts);
}
endutxent();
debug_return_bool(ut != NULL);
}
#elif defined(HAVE_GETUTID)
bool
get_boottime(struct timespec *ts)
{
struct utmp *ut, key;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutent();
if ((ut = getutid(&key)) != NULL) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"BOOT_TIME: %lld", (long long)ut->ut_time);
ts->tv_sec = ut->ut_time;
ts->tv_nsec = 0;
}
endutent();
debug_return_bool(ut != NULL);
}
#else
bool
get_boottime(struct timespec *ts)
{
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
debug_return_bool(false);
}
#endif