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