Fix runlevel transition algorithm, implement SysV-style fifo interface.

* src/prog.h: New file.
* src/Makefile.am: Add new file.
* src/cmdline.opt: New option --telinit (-T).
* src/diag.c (vlogmsg): In sysvin it mode, write
directly to the console. Close it when finished.
* src/pies.c (_cb_initdefault, _cb_runlevels): Use is_valid_runlevel
to check if the specified runlevels are ok.
(main): In sysvinit mode, reset action to ACTION_CONT.
* src/pies.h (progman_filter): New proto.
(progman_accept,register_socket): Change signature.
(deregister_socket): New proto.
(register_program_socket): New proto.
* src/progman.c: Move constant and adatatype definitions to
prog.h
(prog_stop): Remove static qualifier.
(console_open): Likewise.
(progman_accept): Use new socket API.
(progman_stop): Correctly handle timeouts.
(progman_foreach): New function.
* src/socket.c: Register all sockets along with their handlers
in a doubly-linked list.
(sockinst): New struct.
(register_socket,deregister_socket): New functions.
(register_program_socket): New function.
(pies_pause): Traverse the list to find which fd has changed.
Use its registered handler to handle the event.
* src/sysvinit.c: Include prog.h
(is_valid_runlevel): New function.
(sysvinit_fifo_handler,check_fifo): New static functions.
(inittrans): Fix transition algorithm.
(telinit): New function.

1 files changed, 28 insertions, 3 deletions

diff --git a/src/diag.c b/src/diag.c
index fe057d0..bb64ab9 100644
--- a/src/diag.c
+++ b/src/diag.c
@@ -42,17 +42,42 @@ syslog_printer (int prio, const char *fmt, va_list ap)
 #endif
 }
 
+static FILE *
+stderr_open ()
+{
+  if (!init_process)
+    return stderr;
+  else
+    {
+      int fd = console_open (O_WRONLY|O_NOCTTY|O_NDELAY);
+      if (fd == -1)
+	return NULL;
+      return fdopen (fd, "w");
+    }
+}
+
+static void
+stderr_close (FILE *fp)
+{
+  if (init_process)
+    fclose (fp);
+}
+
 void
 vlogmsg (int prio, const char *fmt, va_list ap)
 {
   if (DIAG_OUTPUT (DIAG_TO_STDERR))
     {
       va_list aq;
-      fprintf (stderr, "%s: ", program_name);
+      FILE *fp = stderr_open ();
+      if (!fp)
+	return;
+      fprintf (fp, "%s: ", program_name);
       va_copy (aq, ap);
-      vfprintf (stderr, fmt, aq);
+      vfprintf (fp, fmt, aq);
       va_end (aq);
-      fprintf (stderr, "\n");
+      fprintf (fp, "\n");
+      stderr_close (fp);
     }
   
   if (DIAG_OUTPUT (DIAG_TO_SYSLOG))