git.ozlabs.org Git - ccan/blob - ccan/daemon_with_notify/test/run.c

   1 #include <ccan/daemon_with_notify/daemon_with_notify.h>
   2 #include <ccan/daemon_with_notify/daemon_with_notify.c>
   3 #include <ccan/tap/tap.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <err.h>
   7 #include <errno.h>
   8 #include <string.h>
   9
  10 struct child_data {
  11         pid_t pid;
  12         pid_t ppid;
  13         int in_root_dir;
  14         int read_from_stdin, write_to_stdout, write_to_stderr;
  15 };
  16
  17 int main(int argc, char *argv[])
  18 {
  19         int fds[2];
  20         struct child_data daemonized;
  21         pid_t pid;
  22
  23         plan_tests(5);
  24
  25         if (pipe(fds) != 0)
  26                 err(1, "Failed pipe");
  27
  28         /* Since daemonize forks and parent exits, we need to fork
  29          * that parent. */
  30         pid = fork();
  31         if (pid == -1)
  32                 err(1, "Failed fork");
  33
  34         if (pid == 0) {
  35                 char buffer[2];
  36                 pid = getpid();
  37                 daemonize(0, 0, 1);
  38                 daemon_is_ready();
  39                 /* Keep valgrind happy about uninitialized bytes. */
  40                 memset(&daemonized, 0, sizeof(daemonized));
  41                 daemonized.pid = getpid();
  42                 daemonized.in_root_dir = (getcwd(buffer, 2) != NULL);
  43                 daemonized.read_from_stdin
  44                         = read(STDIN_FILENO, buffer, 1) == -1 ? errno : 0;
  45                 daemonized.write_to_stdout
  46                         = write(STDOUT_FILENO, buffer, 1) == -1 ? errno : 0;
  47                 if (write(STDERR_FILENO, buffer, 1) != 1) {
  48                         daemonized.write_to_stderr = errno;
  49                         if (daemonized.write_to_stderr == 0)
  50                                 daemonized.write_to_stderr = -1;
  51                 } else
  52                         daemonized.write_to_stderr = 0;
  53
  54                 /* Make sure parent exits. */
  55                 while (getppid() == pid)
  56                         sleep(1);
  57                 daemonized.ppid = getppid();
  58                 if (write(fds[1], &daemonized, sizeof(daemonized))
  59                     != sizeof(daemonized))
  60                         exit(1);
  61                 exit(0);
  62         }
  63
  64         if (read(fds[0], &daemonized, sizeof(daemonized)) != sizeof(daemonized))
  65                 err(1, "Failed read");
  66
  67         ok1(daemonized.pid != pid);
  68 #if 0   /* Believe it or not, this fails under Ubuntu 13.10 (Upstart) */
  69         ok1(daemonized.ppid == 1);
  70 #endif
  71         ok1(daemonized.in_root_dir);
  72         ok1(daemonized.read_from_stdin == 0);
  73         ok1(daemonized.write_to_stdout == 0);
  74         ok1(daemonized.write_to_stderr == 0);
  75
  76         return exit_status();
  77 }