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Diffstat (limited to 'tools/testing/selftests/kcmp/kcmp_test.c')
-rw-r--r--tools/testing/selftests/kcmp/kcmp_test.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
new file mode 100644
index 000000000000..358cc6bfa35d
--- /dev/null
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -0,0 +1,94 @@
1#define _GNU_SOURCE
2
3#include <stdio.h>
4#include <stdlib.h>
5#include <signal.h>
6#include <limits.h>
7#include <unistd.h>
8#include <errno.h>
9#include <string.h>
10#include <fcntl.h>
11
12#include <linux/unistd.h>
13#include <linux/kcmp.h>
14
15#include <sys/syscall.h>
16#include <sys/types.h>
17#include <sys/stat.h>
18#include <sys/wait.h>
19
20static long sys_kcmp(int pid1, int pid2, int type, int fd1, int fd2)
21{
22 return syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
23}
24
25int main(int argc, char **argv)
26{
27 const char kpath[] = "kcmp-test-file";
28 int pid1, pid2;
29 int fd1, fd2;
30 int status;
31
32 fd1 = open(kpath, O_RDWR | O_CREAT | O_TRUNC, 0644);
33 pid1 = getpid();
34
35 if (fd1 < 0) {
36 perror("Can't create file");
37 exit(1);
38 }
39
40 pid2 = fork();
41 if (pid2 < 0) {
42 perror("fork failed");
43 exit(1);
44 }
45
46 if (!pid2) {
47 int pid2 = getpid();
48 int ret;
49
50 fd2 = open(kpath, O_RDWR, 0644);
51 if (fd2 < 0) {
52 perror("Can't open file");
53 exit(1);
54 }
55
56 /* An example of output and arguments */
57 printf("pid1: %6d pid2: %6d FD: %2ld FILES: %2ld VM: %2ld "
58 "FS: %2ld SIGHAND: %2ld IO: %2ld SYSVSEM: %2ld "
59 "INV: %2ld\n",
60 pid1, pid2,
61 sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd2),
62 sys_kcmp(pid1, pid2, KCMP_FILES, 0, 0),
63 sys_kcmp(pid1, pid2, KCMP_VM, 0, 0),
64 sys_kcmp(pid1, pid2, KCMP_FS, 0, 0),
65 sys_kcmp(pid1, pid2, KCMP_SIGHAND, 0, 0),
66 sys_kcmp(pid1, pid2, KCMP_IO, 0, 0),
67 sys_kcmp(pid1, pid2, KCMP_SYSVSEM, 0, 0),
68
69 /* This one should fail */
70 sys_kcmp(pid1, pid2, KCMP_TYPES + 1, 0, 0));
71
72 /* This one should return same fd */
73 ret = sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd1);
74 if (ret) {
75 printf("FAIL: 0 expected but %d returned\n", ret);
76 ret = -1;
77 } else
78 printf("PASS: 0 returned as expected\n");
79
80 /* Compare with self */
81 ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0);
82 if (ret) {
83 printf("FAIL: 0 expected but %li returned\n", ret);
84 ret = -1;
85 } else
86 printf("PASS: 0 returned as expected\n");
87
88 exit(ret);
89 }
90
91 waitpid(pid2, &status, P_ALL);
92
93 return 0;
94}