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34 lines
567 B
34 lines
567 B
#include <litc.h>
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void child(int id)
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{
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int i;
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for (i = 0; i < 3; i++) {
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printf("hello from %d\n", id);
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}
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exit(id);
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}
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int main(int argc, char **argv)
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{
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int pid = 0;
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int id = 0;
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while (id < 100) {
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pid = fork();
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id++;
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if (!pid)
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child(id);
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//if (wait(NULL) != pid)
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// errx(-1, "wrong pid %d", pid);
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if (wait4(pid, NULL, 0, NULL) != pid)
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errx(-1, "wrong pid %d", pid);
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if (wait4(pid - 1, NULL, 0, NULL) > 0)
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errx(-1, "wait4 should fail");
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if (wait(NULL) > 0)
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errx(-1, "wait should fail");
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}
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printf("parent done!\n");
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return 0;
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}
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