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41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/log/check.h"
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#include "libc/stdio/rand.h"
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#include "libc/stdio/stdio.h"
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dontinline void dostuff(const char *s) {
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int i, us;
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srand(_rand64()); /* seeds rand() w/ intel rdrnd, auxv, etc. */
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for (i = 0; i < 5; ++i) {
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us = rand() % 500000;
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usleep(us);
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printf("hello no. %u from %s %u [us=%d]\n", i, s, getpid(), us);
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fflush(stdout);
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}
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}
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int main(int argc, char *argv[]) {
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int rc, child, wstatus;
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CHECK_NE(-1, (child = fork()));
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if (!child) {
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/* child process */
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dostuff("child");
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return 0;
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} else {
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/* parent process */
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dostuff("parent");
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/* note: abandoned children become zombies */
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CHECK_NE(-1, (rc = wait(&wstatus)));
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CHECK_EQ(0, WEXITSTATUS(wstatus));
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return 0;
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}
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}
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