| 1234567891011121314151617 |
- #include <sys/wait.h>
- #include <unistd.h>
- #include <errno.h>
- #include <stdio.h>
- int main()
- {
- int status;
- pid_t p = getpid();
- // waitpid takes a children's pid, not the current process one
- // if the pid is not a children of the current process, it returns -ECHILD
- pid_t res = waitpid(1001, &status, WNOHANG);
- printf("res is %d, p is %d and errno is %d\n", res, p, errno);
- }
|
