+#include <ccan/daemonize/daemonize.h>
+#include <ccan/daemonize/daemonize.c>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <errno.h>
+
+struct child_data {
+ pid_t pid;
+ pid_t ppid;
+ bool in_root_dir;
+ int read_from_stdin, write_to_stdout, write_to_stderr;
+};
+
+int main(int argc, char *argv[])
+{
+ int fds[2];
+ struct child_data daemonized;
+ pid_t pid;
+
+ plan_tests(6);
+
+ if (pipe(fds) != 0)
+ err(1, "Failed pipe");
+
+ /* Since daemonize forks and parent exits, we need to fork
+ * that parent. */
+ pid = fork();
+ if (pid == -1)
+ err(1, "Failed fork");
+
+ if (pid == 0) {
+ char buffer[2];
+ pid = getpid();
+ daemonize();
+ daemonized.pid = getpid();
+ daemonized.in_root_dir = (getcwd(buffer, 2) != NULL);
+ daemonized.read_from_stdin
+ = read(STDIN_FILENO, buffer, 1) == -1 ? errno : 0;
+ daemonized.write_to_stdout
+ = write(STDOUT_FILENO, buffer, 1) == -1 ? errno : 0;
+ daemonized.write_to_stderr
+ = write(STDERR_FILENO, buffer, 1) == -1 ? errno : 0;
+
+ /* Make sure parent exits. */
+ while (getppid() == pid)
+ sleep(1);
+ daemonized.ppid = getppid();
+ write(fds[1], &daemonized, sizeof(daemonized));
+ exit(0);
+ }
+
+ if (read(fds[0], &daemonized, sizeof(daemonized)) != sizeof(daemonized))
+ err(1, "Failed read");
+
+ ok1(daemonized.pid != pid);
+ ok1(daemonized.ppid == 1);
+ ok1(daemonized.in_root_dir);
+ ok1(daemonized.read_from_stdin == EBADF);
+ ok1(daemonized.write_to_stdout == EBADF);
+ ok1(daemonized.write_to_stderr == EBADF);
+
+ return exit_status();
+}