53 lines
920 B
C
53 lines
920 B
C
// Test that fork fails gracefully.
|
|
// Tiny executable so that the limit can be filling the proc table.
|
|
|
|
#include "types.h"
|
|
#include "stat.h"
|
|
#include "user.h"
|
|
|
|
#define N 1000
|
|
|
|
void printf(int fd, const char *s, ...) {
|
|
write(fd, s, strlen(s));
|
|
}
|
|
|
|
void forktest(void) {
|
|
int n, pid;
|
|
|
|
printf(1, "fork test\n");
|
|
|
|
for (n = 0; n < N; n++) {
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
break;
|
|
}
|
|
if (pid == 0) {
|
|
exit();
|
|
}
|
|
}
|
|
|
|
if (n == N) {
|
|
printf(1, "fork claimed to work N times!\n", N);
|
|
exit();
|
|
}
|
|
|
|
for (; n > 0; n--) {
|
|
if (wait() < 0) {
|
|
printf(1, "wait stopped early\n");
|
|
exit();
|
|
}
|
|
}
|
|
|
|
if (wait() != -1) {
|
|
printf(1, "wait got too many\n");
|
|
exit();
|
|
}
|
|
|
|
printf(1, "fork test OK\n");
|
|
}
|
|
|
|
int main(int argc, char* argv[]) {
|
|
forktest();
|
|
exit();
|
|
}
|