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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2017 Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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 <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sudo_compat.h>
#include <sudo_util.h>
#include <sudo_fatal.h>
#include <timestamp.h>
sudo_dso_public int main(int argc, char *argv[]);
#if defined(sudo_kinfo_proc) || defined(__linux__) || defined(HAVE_STRUCT_PSINFO_PR_TTYDEV) || defined(HAVE_PSTAT_GETPROC) || defined(__gnu_hurd__)
#ifdef __linux__
static int
get_now(struct timespec *now)
{
const char *errstr;
char buf[1024];
time_t seconds;
int ret = -1;
FILE *fp;
/* Linux process start time is relative to boot time. */
fp = fopen("/proc/stat", "r");
if (fp != NULL) {
while (fgets(buf, sizeof(buf), fp) != NULL) {
if (strncmp(buf, "btime ", 6) != 0)
continue;
buf[strcspn(buf, "\n")] = '\0';
/* Boot time is in seconds since the epoch. */
seconds = sudo_strtonum(buf + 6, 0, TIME_T_MAX, &errstr);
if (errstr != NULL)
return -1;
/* Instead of the real time, "now" is relative to boot time. */
if (sudo_gettime_real(now) == -1)
return -1;
now->tv_sec -= seconds;
ret = 0;
break;
}
fclose(fp);
}
return ret;
}
#else
static int
get_now(struct timespec *now)
{
/* Process start time is relative to wall clock time. */
return sudo_gettime_real(now);
}
#endif
int
main(int argc, char *argv[])
{
int ch, ntests = 0, errors = 0;
struct timespec now, then, delta;
time_t timeoff = 0;
pid_t pids[2];
char *faketime;
unsigned int i;
initprogname(argc > 0 ? argv[0] : "check_starttime");
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
/* ignored */
break;
default:
fprintf(stderr, "usage: %s [-v]\n", getprogname());
return EXIT_FAILURE;
}
}
argc -= optind;
argv += optind;
if (get_now(&now) == -1)
sudo_fatal_nodebug("unable to get current time");
pids[0] = getpid();
pids[1] = getppid();
/* Debian CI pipeline runs tests using faketime. */
faketime = getenv("FAKETIME");
if (faketime != NULL)
timeoff = sudo_strtonum(faketime, TIME_T_MIN, TIME_T_MAX, NULL);
for (i = 0; i < 2; i++) {
ntests++;
if (get_starttime(pids[i], &then) == -1) {
printf("%s: test %d: unable to get start time for pid %d\n",
getprogname(), ntests, (int)pids[i]);
errors++;
}
if (i != 0)
continue;
/* Verify our own process start time, allowing for some drift. */
ntests++;
sudo_timespecsub(&then, &now, &delta);
delta.tv_sec += timeoff;
if (delta.tv_sec > 30 || delta.tv_sec < -30) {
printf("%s: test %d: unexpected start time for pid %d: %s",
getprogname(), ntests, (int)pids[i], ctime(&then.tv_sec));
errors++;
}
}
if (ntests != 0) {
printf("%s: %d tests run, %d errors, %d%% success rate\n",
getprogname(), ntests, errors, (ntests - errors) * 100 / ntests);
}
return errors;
}
#else
int
main(int argc, char *argv[])
{
/* get_starttime not supported */
return 0;
}
#endif
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