fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 1 | #include <unistd.h> |
| 2 | #include <signal.h> |
| 3 | #include <errno.h> |
| 4 | #include <string.h> |
| 5 | #include <stdio.h> |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 6 | #include <sys/wait.h> |
| 7 | #include <sys/types.h> |
| 8 | #include <stdlib.h> |
| 9 | |
| 10 | static void do_exec(const char *path, const char *arg, const sigset_t *mask) |
| 11 | { |
| 12 | pid_t pid; |
| 13 | int status; |
| 14 | |
| 15 | pid = fork(); |
| 16 | if (pid == -1) { |
| 17 | perror("fork"); |
| 18 | exit(1); |
| 19 | } |
| 20 | if (pid == 0) { |
| 21 | sigprocmask(SIG_SETMASK, mask, NULL); |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 22 | execl(path, path, arg, (char *) NULL); |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 23 | |
| 24 | fprintf(stderr, "FAILED: execl failed with %s\n", |
| 25 | strerror(errno)); |
| 26 | } else { |
| 27 | int ret; |
| 28 | do |
| 29 | ret = waitpid(pid, &status, 0); |
| 30 | while(ret == -1 && errno == EINTR); |
| 31 | if (ret != pid) { |
| 32 | perror("waitpid"); |
| 33 | exit(1); |
| 34 | } |
| 35 | if (status != 0) { |
| 36 | fprintf(stderr, "child exec failed\n"); |
| 37 | exit(1); |
| 38 | } |
| 39 | } |
| 40 | } |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 41 | |
| 42 | int main(int argc, char **argv) |
| 43 | { |
| 44 | if (argc == 1) { |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 45 | sigset_t mask; |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 46 | |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 47 | sigfillset(&mask); |
| 48 | do_exec(argv[0], "full", &mask); |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 49 | |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 50 | sigemptyset(&mask); |
| 51 | do_exec(argv[0], "empty", &mask); |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 52 | } else { |
| 53 | sigset_t mask; |
| 54 | int i; |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 55 | int empty; |
| 56 | |
| 57 | if (strcmp(argv[1], "full") == 0) |
| 58 | empty = 0; |
| 59 | else if (strcmp(argv[1], "empty") == 0) |
| 60 | empty = 1; |
| 61 | else { |
| 62 | fprintf(stderr, "empty or full?\n"); |
| 63 | exit(1); |
| 64 | } |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 65 | |
| 66 | sigprocmask(SIG_SETMASK, NULL, &mask); |
| 67 | |
| 68 | for(i = 1; i < NSIG; i++) { |
| 69 | if (i == SIGKILL || i == SIGSTOP) |
| 70 | continue; |
| 71 | |
sewardj | b5f6f51 | 2005-03-10 23:59:00 +0000 | [diff] [blame] | 72 | if (empty) { |
| 73 | if (sigismember(&mask, i)) |
| 74 | printf("empty: signal %d added to mask\n", i); |
| 75 | } else { |
| 76 | if (!sigismember(&mask, i)) |
| 77 | printf("full: signal %d missing from mask\n", i); |
| 78 | } |
fitzhardinge | 6263a65 | 2004-01-16 05:37:46 +0000 | [diff] [blame] | 79 | } |
| 80 | } |
| 81 | |
| 82 | return 0; |
| 83 | } |