Commit | Line | Data |
---|---|---|
d97b46a6 CG |
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 | ||
20 | static 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 | ||
25 | int 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) { | |
2bf1cbf1 DJ |
75 | printf("FAIL: 0 expected but %d returned (%s)\n", |
76 | ret, strerror(errno)); | |
d97b46a6 CG |
77 | ret = -1; |
78 | } else | |
79 | printf("PASS: 0 returned as expected\n"); | |
80 | ||
81 | /* Compare with self */ | |
82 | ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0); | |
83 | if (ret) { | |
6e7e6c34 | 84 | printf("FAIL: 0 expected but %d returned (%s)\n", |
2bf1cbf1 | 85 | ret, strerror(errno)); |
d97b46a6 CG |
86 | ret = -1; |
87 | } else | |
88 | printf("PASS: 0 returned as expected\n"); | |
89 | ||
90 | exit(ret); | |
91 | } | |
92 | ||
93 | waitpid(pid2, &status, P_ALL); | |
94 | ||
95 | return 0; | |
96 | } |