sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include <errno.h> |
bart | 667c677 | 2011-05-08 09:29:06 +0000 | [diff] [blame^] | 4 | #include <unistd.h> |
| 5 | #include <sys/wait.h> |
| 6 | |
| 7 | int main() |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 8 | { |
| 9 | int mem = 0; |
| 10 | int pid; |
| 11 | |
| 12 | pid = fork(); |
| 13 | if (pid == -1) { |
| 14 | mem = 1; |
| 15 | perror("fork"); |
| 16 | exit(1); |
| 17 | } |
| 18 | |
| 19 | if (pid == 0) { |
| 20 | if (mem == 0) |
| 21 | exit(0); |
| 22 | else |
| 23 | exit(1); |
| 24 | } else { |
| 25 | int ret; |
| 26 | int status; |
| 27 | while((ret = waitpid(pid, &status, 0)) != pid) { |
| 28 | if (errno != EINTR) { |
| 29 | perror("waitpid"); |
| 30 | exit(1); |
| 31 | } |
| 32 | } |
| 33 | mem = status; |
| 34 | } |
| 35 | if (mem == 0) |
| 36 | printf("mem is zero\n"); |
bart | 667c677 | 2011-05-08 09:29:06 +0000 | [diff] [blame^] | 37 | |
| 38 | return 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 39 | } |