Daemonize test.

diff --git a/ccan/daemonize/test/run.c b/ccan/daemonize/test/run.c
new file mode 100644 (file)
index 0000000..9802c44
--- /dev/null
+++ b/ccan/daemonize/test/run.c
@@ -0,0 +1,65 @@
+#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();
+}