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This commit is contained in:
Justine Tunney 2020-12-01 03:43:40 -08:00
parent 3e4fd4b0ad
commit e44a0cf6f8
256 changed files with 23100 additions and 2294 deletions
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11
examples/forkrand.c
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@ -16,13 +16,13 @@
#include "libc/stdio/stdio.h"
#include "libc/time/time.h"
noinline void dostuff(void) {
noinline void dostuff(const char *s) {
int i, us;
srand(rand64()); /* seeds rand() w/ intel rdrnd, auxv, etc. */
for (i = 0; i < 5; ++i) {
us = rand() % 500000;
usleep(us);
printf("%s%u%s%u [%s=%d]\n", "hello no. ", i, " from ", getpid(), "us", us);
printf("hello no. %u from %s %u [us=%d]\n", i, s, getpid(), us);
fflush(stdout);
}
}
@ -32,13 +32,14 @@ int main(int argc, char *argv[]) {
CHECK_NE(-1, (child = fork()));
if (!child) {
/* child process */
dostuff();
dostuff("child");
return 0;
} else {
/* parent process */
dostuff();
dostuff("parent");
/* note: abandoned children become zombies */
CHECK_NE(-1, (rc = wait(&wstatus)));
return WEXITSTATUS(wstatus);
CHECK_EQ(0, WEXITSTATUS(wstatus));
return 0;
}
}