process-reaper.c

/* From the 'musl-tools' package:
 *
 *    $ musl-gcc -Wall -Os -static -o test test.c
 */

#include <signal.h>
#include <sys/wait.h>
#include <unistd.h>

void nothing(int signum) {}

void term(int signum) {
  _exit(0);
}

int main() {
  signal(SIGCHLD, nothing);
  signal(SIGTERM, term);
  signal(SIGINT, term);

  while(1) {
    pause();
    while(wait(NULL) != -1);
  }

  return 0;
}