diff options
Diffstat (limited to 'test/signal/sigchld.c')
| -rw-r--r-- | test/signal/sigchld.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/test/signal/sigchld.c b/test/signal/sigchld.c index 05f4d1594..cf82bb6b5 100644 --- a/test/signal/sigchld.c +++ b/test/signal/sigchld.c @@ -1,34 +1,57 @@ #include <stdlib.h> +#include <string.h> +#include <errno.h> #include <stdio.h> #include <sys/signal.h> +#include <sys/wait.h> #include <unistd.h> + void test_handler(int signo) { - fprintf(stderr, "caught signo: %d\n", signo); + printf("caught signo: %d\n", signo); + fflush(stdout); } int main(void) { + pid_t mypid; int count = 0; struct sigaction siga; static sigset_t sigset; + mypid = getpid(); + + if (fork() == 0) { + int i; + + for (i=0; i < 3; i++) { + sleep(2); + kill(mypid, SIGCHLD); + } + exit(EXIT_SUCCESS); + } + sigfillset(&sigset); siga.sa_handler = test_handler; siga.sa_mask = sigset; siga.sa_flags = 0; - if (0 != sigaction(SIGCHLD, &siga, (struct sigaction *)NULL)) { - fprintf(stderr, "ack!"); + if (sigaction(SIGCHLD, &siga, (struct sigaction *)NULL) != 0) { + fprintf(stderr, "sigaction choked: %s!", strerror(errno)); + exit(EXIT_FAILURE); } - printf("give me a SIGCHLD\n"); + printf("waiting for a SIGCHLD\n"); + fflush(stdout); for(;;) { sleep(10); + if (waitpid(-1, NULL, WNOHANG | WUNTRACED) > 0) + break; printf("after sleep %d\n", ++count); + fflush(stdout); } printf("after loop\n"); |