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#include <assert.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>
_Atomic int prepare_order = 0;
_Atomic int parent_order = 0;
_Atomic int child_order = 0;
static void prepare1() { prepare_order = 1; }
static void prepare2() { prepare_order = 2; }
static void parent1() { parent_order = 1; }
static void parent2() { parent_order = 2; }
static void child1() { child_order = 1; }
static void child2() { child_order = 2; }
int main() {
assert(!pthread_atfork(prepare1, parent1, child1));
assert(!pthread_atfork(prepare2, parent2, child2));
pid_t pid = fork();
assert(pid >= 0);
if (!pid) {
assert(child_order == 2);
exit(0);
} else {
assert(prepare_order == 1);
assert(parent_order == 2);
while (1) {
int status = 0;
int ret = waitpid(pid, &status, 0);
if (ret == -1 && errno == EINTR)
continue;
assert(ret > 0);
if (WIFSIGNALED(status) && WTERMSIG(status) == SIGABRT)
return 1;
return WEXITSTATUS(status);
}
}
return 0;
}
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