-#include <errno.h>
+/**
+ * This program waits for child process and "reaps" them, i.e. read
+ * off their status so that they can terminate. The program exits when
+ * it runs out of children.
+ */
#include <signal.h>
#include <string.h>
-#include <unistd.h>
#include <sys/wait.h>
-#include <sys/types.h>
int main(void) {
- sigset_t set;
- siginfo_t status;
+ sigset_t set;
+ siginfo_t status;
- if (getpid()!=1)
- return 1;
- sigfillset(&set);
- sigprocmask(SIG_BLOCK,&set,NULL);
- memset(&status,0,sizeof status);
- while (-ECHILD!=waitid(P_ALL,0,&status,WEXITED));
- return 1;
+ sigfillset(&set);
+ sigprocmask(SIG_BLOCK,&set,NULL);
+
+ do {
+ memset( &status, 0, sizeof( status ) );
+ } while ( waitid( P_ALL, 0, &status, WEXITED ) == 0 );
+ return 0;
}