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daemonize
routine to turn a process into a well-behaved daemon.
Daemons should detach themselves thoroughly from the process which launched them, and not prevent any filesystems from being unmounted. daemonize() helps with the process.
#include <ccan/daemonize/daemonize.h>
#include <ccan/str/str.h>
#include <err.h>
#include <unistd.h>
#include <stdlib.h>
static void usage(const char *name)
{
errx(1, "Usage: %s [--daemonize]\n", name);
}
// Wait for a minute, possibly as a daemon.
int main(int argc, char *argv[])
{
if (argc != 1) {
if (argc == 2 && streq(argv[1], "--daemonize")) {
if (!daemonize())
err(1, "Failed to become daemon");
} else
usage(argv[1]);
}
sleep(60);
exit(0);
}
BSD-MIT