1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #define _GNU_SOURCE
3*4882a593Smuzhiyun #include <errno.h>
4*4882a593Smuzhiyun #include <fcntl.h>
5*4882a593Smuzhiyun #include <sched.h>
6*4882a593Smuzhiyun #include <stdio.h>
7*4882a593Smuzhiyun #include <stdbool.h>
8*4882a593Smuzhiyun #include <sys/stat.h>
9*4882a593Smuzhiyun #include <sys/syscall.h>
10*4882a593Smuzhiyun #include <sys/types.h>
11*4882a593Smuzhiyun #include <sys/wait.h>
12*4882a593Smuzhiyun #include <time.h>
13*4882a593Smuzhiyun #include <unistd.h>
14*4882a593Smuzhiyun #include <string.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include "log.h"
17*4882a593Smuzhiyun #include "timens.h"
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define OFFSET (36000)
20*4882a593Smuzhiyun
main(int argc,char * argv[])21*4882a593Smuzhiyun int main(int argc, char *argv[])
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun struct timespec now, tst;
24*4882a593Smuzhiyun int status, i;
25*4882a593Smuzhiyun pid_t pid;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (argc > 1) {
28*4882a593Smuzhiyun if (sscanf(argv[1], "%ld", &now.tv_sec) != 1)
29*4882a593Smuzhiyun return pr_perror("sscanf");
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun for (i = 0; i < 2; i++) {
32*4882a593Smuzhiyun _gettime(CLOCK_MONOTONIC, &tst, i);
33*4882a593Smuzhiyun if (abs(tst.tv_sec - now.tv_sec) > 5)
34*4882a593Smuzhiyun return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec);
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun return 0;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun nscheck();
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun ksft_set_plan(1);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun clock_gettime(CLOCK_MONOTONIC, &now);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (unshare_timens())
46*4882a593Smuzhiyun return 1;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (_settime(CLOCK_MONOTONIC, OFFSET))
49*4882a593Smuzhiyun return 1;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun for (i = 0; i < 2; i++) {
52*4882a593Smuzhiyun _gettime(CLOCK_MONOTONIC, &tst, i);
53*4882a593Smuzhiyun if (abs(tst.tv_sec - now.tv_sec) > 5)
54*4882a593Smuzhiyun return pr_fail("%ld %ld\n",
55*4882a593Smuzhiyun now.tv_sec, tst.tv_sec);
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun if (argc > 1)
59*4882a593Smuzhiyun return 0;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun pid = fork();
62*4882a593Smuzhiyun if (pid < 0)
63*4882a593Smuzhiyun return pr_perror("fork");
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun if (pid == 0) {
66*4882a593Smuzhiyun char now_str[64];
67*4882a593Smuzhiyun char *cargv[] = {"exec", now_str, NULL};
68*4882a593Smuzhiyun char *cenv[] = {NULL};
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /* Check that a child process is in the new timens. */
71*4882a593Smuzhiyun for (i = 0; i < 2; i++) {
72*4882a593Smuzhiyun _gettime(CLOCK_MONOTONIC, &tst, i);
73*4882a593Smuzhiyun if (abs(tst.tv_sec - now.tv_sec - OFFSET) > 5)
74*4882a593Smuzhiyun return pr_fail("%ld %ld\n",
75*4882a593Smuzhiyun now.tv_sec + OFFSET, tst.tv_sec);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun /* Check for proper vvar offsets after execve. */
79*4882a593Smuzhiyun snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
80*4882a593Smuzhiyun execve("/proc/self/exe", cargv, cenv);
81*4882a593Smuzhiyun return pr_perror("execve");
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun if (waitpid(pid, &status, 0) != pid)
85*4882a593Smuzhiyun return pr_perror("waitpid");
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun if (status)
88*4882a593Smuzhiyun ksft_exit_fail();
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun ksft_test_result_pass("exec\n");
91*4882a593Smuzhiyun ksft_exit_pass();
92*4882a593Smuzhiyun return 0;
93*4882a593Smuzhiyun }
94