Cyrill Gorcunov | d97b46a | 2012-05-31 16:26:44 -0700 | [diff] [blame] | 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) { |
Dave Jones | 2bf1cbf | 2012-12-17 16:04:52 -0800 | [diff] [blame] | 75 | printf("FAIL: 0 expected but %d returned (%s)\n", |
| 76 | ret, strerror(errno)); |
Cyrill Gorcunov | d97b46a | 2012-05-31 16:26:44 -0700 | [diff] [blame] | 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) { |
Shuah Khan | 6e7e6c3 | 2014-06-24 18:11:26 -0600 | [diff] [blame] | 84 | printf("FAIL: 0 expected but %d returned (%s)\n", |
Dave Jones | 2bf1cbf | 2012-12-17 16:04:52 -0800 | [diff] [blame] | 85 | ret, strerror(errno)); |
Cyrill Gorcunov | d97b46a | 2012-05-31 16:26:44 -0700 | [diff] [blame] | 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 | } |