1 // SPDX-License-Identifier: GPL-2.0
9 #include <sys/syscall.h>
10 #include <sys/types.h>
19 #define OFFSET (36000)
21 int main(int argc, char *argv[])
23 struct timespec now, tst;
28 if (sscanf(argv[1], "%ld", &now.tv_sec) != 1)
29 return pr_perror("sscanf");
31 for (i = 0; i < 2; i++) {
32 _gettime(CLOCK_MONOTONIC, &tst, i);
33 if (abs(tst.tv_sec - now.tv_sec) > 5)
34 return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec);
43 clock_gettime(CLOCK_MONOTONIC, &now);
48 if (_settime(CLOCK_MONOTONIC, OFFSET))
51 for (i = 0; i < 2; i++) {
52 _gettime(CLOCK_MONOTONIC, &tst, i);
53 if (abs(tst.tv_sec - now.tv_sec) > 5)
54 return pr_fail("%ld %ld\n",
55 now.tv_sec, tst.tv_sec);
63 return pr_perror("fork");
67 char *cargv[] = {"exec", now_str, NULL};
68 char *cenv[] = {NULL};
70 /* Check that a child process is in the new timens. */
71 for (i = 0; i < 2; i++) {
72 _gettime(CLOCK_MONOTONIC, &tst, i);
73 if (abs(tst.tv_sec - now.tv_sec - OFFSET) > 5)
74 return pr_fail("%ld %ld\n",
75 now.tv_sec + OFFSET, tst.tv_sec);
78 /* Check for proper vvar offsets after execve. */
79 snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
80 execve("/proc/self/exe", cargv, cenv);
81 return pr_perror("execve");
84 if (waitpid(pid, &status, 0) != pid)
85 return pr_perror("waitpid");
90 ksft_test_result_pass("exec\n");