plymouth/0001-let-it-become-a-real-daemon.patch

Related to bnc#892526 -- let plymouthd become a real daemon that
is it should use its own session with the help of the system call
setsid(2).  Also avoid an EBUSY on ioctl TIOCCONS if a former
plymouthd had failed.  And a crash or termination may restore not
only the current virtual console but also any serial console as
well restore the system console.

---
 plymouth-0.9.0/src/libply-splash-core/ply-device-manager.c |    9 ++
 plymouth-0.9.0/src/libply-splash-core/ply-device-manager.h |    1 
 plymouth-0.9.0/src/libply/ply-terminal-session.c           |    7 ++
 plymouth-0.9.0/src/libply/ply-utils.c                      |    2 
 plymouth-0.9.0/src/main.c                                  |   42 +++++++------
 5 files changed, 43 insertions(+), 18 deletions(-)

Index: plymouth-0.9.2+git20160823.e4b7e49/src/libply-splash-core/ply-device-manager.c
===================================================================
--- plymouth-0.9.2+git20160823.e4b7e49.orig/src/libply-splash-core/ply-device-manager.c
+++ plymouth-0.9.2+git20160823.e4b7e49/src/libply-splash-core/ply-device-manager.c
@@ -949,3 +949,12 @@ ply_device_manager_deactivate_keyboards
 
         manager->keyboards_activated = false;
 }
+
+void
+ply_close_all_terminals (ply_device_manager_t *manager)
+{
+  ply_hashtable_foreach (manager->terminals,
+                         (ply_hashtable_foreach_func_t *)
+                         ply_terminal_close,
+                         manager);
+}
Index: plymouth-0.9.2+git20160823.e4b7e49/src/libply-splash-core/ply-device-manager.h
===================================================================
--- plymouth-0.9.2+git20160823.e4b7e49.orig/src/libply-splash-core/ply-device-manager.h
+++ plymouth-0.9.2+git20160823.e4b7e49/src/libply-splash-core/ply-device-manager.h
@@ -65,6 +65,7 @@ void ply_device_manager_deactivate_keybo
 void ply_device_manager_activate_renderers (ply_device_manager_t *manager);
 void ply_device_manager_deactivate_renderers (ply_device_manager_t *manager);
 ply_terminal_t *ply_device_manager_get_default_terminal (ply_device_manager_t *manager);
+void ply_close_all_terminals (ply_device_manager_t *manager);
 
 #endif
 
Index: plymouth-0.9.2+git20160823.e4b7e49/src/libply/ply-utils.c
===================================================================
--- plymouth-0.9.2+git20160823.e4b7e49.orig/src/libply/ply-utils.c
+++ plymouth-0.9.2+git20160823.e4b7e49/src/libply/ply-utils.c
@@ -77,6 +77,7 @@
 
 static int errno_stack[PLY_ERRNO_STACK_SIZE];
 static int errno_stack_position = 0;
+static bool inChild = false;
 
 static int overridden_device_scale = 0;
 
@@ -796,6 +797,7 @@ ply_create_daemon (void)
                 if (!ply_read (receiver_fd, &byte, sizeof(uint8_t))) {
                         int read_error = errno;
                         int status;
+                        inChild = true;
 
                         if (waitpid (pid, &status, WNOHANG) <= 0)
                                 ply_error ("failed to read status from child immediately after starting to daemonize: %s", strerror (read_error));
@@ -836,6 +838,9 @@ ply_detach_daemon (ply_daemon_handle_t *
         close (sender_fd);
         free (handle);
 
+        if (inChild)
+            setsid();
+
         return true;
 }
 
Index: plymouth-0.9.2+git20160823.e4b7e49/src/libply/ply-terminal-session.c
===================================================================
--- plymouth-0.9.2+git20160823.e4b7e49.orig/src/libply/ply-terminal-session.c
+++ plymouth-0.9.2+git20160823.e4b7e49/src/libply/ply-terminal-session.c
@@ -187,6 +187,12 @@ ply_terminal_session_redirect_console (p
 
         assert (terminal_name != NULL);
 
+        fd = open ("/dev/console", O_RDWR | O_NOCTTY);
+        if (fd >= 0) {
+            ioctl (fd, TIOCCONS);   /* Undo any current map if any */
+            close (fd);
+        }
+
         fd = open (terminal_name, O_RDWR | O_NOCTTY);
 
         if (fd < 0)
Index: plymouth-0.9.2+git20160823.e4b7e49/src/main.c
===================================================================
--- plymouth-0.9.2+git20160823.e4b7e49.orig/src/main.c
+++ plymouth-0.9.2+git20160823.e4b7e49/src/main.c
@@ -1101,6 +1101,7 @@ on_text_display_removed (state_t
         ply_boot_splash_remove_text_display (state->boot_splash, display);
 }
 
+static ply_device_manager_t *manager;
 static void
 load_devices (state_t                   *state,
               ply_device_manager_flags_t flags)
@@ -1108,6 +1109,8 @@ load_devices (state_t
         state->device_manager = ply_device_manager_new (state->default_tty, flags);
         state->local_console_terminal = ply_device_manager_get_default_terminal (state->device_manager);
 
+        manager = state->device_manager;
+
         ply_device_manager_watch_devices (state->device_manager,
                                           state->device_timeout,
                                           (ply_keyboard_added_handler_t)
@@ -1146,6 +1149,7 @@ quit_splash (state_t *state)
                         ply_trace ("Not retaining splash, so deallocating VT");
                         ply_terminal_deactivate_vt (state->local_console_terminal);
                         ply_terminal_close (state->local_console_terminal);
+                        ply_close_all_terminals (state->device_manager);
                 }
         }
 
@@ -2091,28 +2095,20 @@ dump_debug_buffer_to_file (void)
 #include <termios.h>
 #include <unistd.h>
 static void
-on_crash (int signum)
+dosigaction (int signum)
 {
-        struct termios term_attributes;
         int fd;
-        static const char *show_cursor_sequence = "\033[?25h";
-
-        fd = open ("/dev/tty1", O_RDWR | O_NOCTTY);
-        if (fd < 0) fd = open ("/dev/hvc0", O_RDWR | O_NOCTTY);
-
-        ioctl (fd, KDSETMODE, KD_TEXT);
-
-        write (fd, show_cursor_sequence, sizeof (show_cursor_sequence) - 1);
-
-        tcgetattr (fd, &term_attributes);
 
-        term_attributes.c_iflag |= BRKINT | IGNPAR | ICRNL | IXON;
-        term_attributes.c_oflag |= OPOST;
-        term_attributes.c_lflag |= ECHO | ICANON | ISIG | IEXTEN;
-
-        tcsetattr (fd, TCSAFLUSH, &term_attributes);
+        if (manager) {
+            ply_device_manager_deactivate_keyboards (manager);
+            ply_close_all_terminals (manager);
+        }
 
-        close (fd);
+        fd = open ("/dev/console", O_RDWR | O_NOCTTY);
+        if (fd >= 0) {
+            ioctl (fd, TIOCCONS);   /* Undo any current map if any */
+            close (fd);
+        }
 
         if (debug_buffer != NULL) {
                 dump_debug_buffer_to_file ();
@@ -2125,7 +2121,6 @@ on_crash (int signum)
                 pid_file = NULL;
         }
 
-        signal (signum, SIG_DFL);
         raise (signum);
 }
 
@@ -2159,6 +2154,7 @@ main (int    argc,
         char *kernel_command_line = NULL;
         char *tty = NULL;
         ply_device_manager_flags_t device_manager_flags = PLY_DEVICE_MANAGER_FLAGS_NONE;
+        struct sigaction sa;
 
         state.start_time = ply_get_timestamp ();
         state.command_parser = ply_command_parser_new ("plymouthd", "Splash server");
@@ -2261,8 +2257,13 @@ main (int    argc,
         if (debug)
                 debug_buffer = ply_buffer_new ();
 
-        signal (SIGABRT, on_crash);
-        signal (SIGSEGV, on_crash);
+        sigemptyset(&sa.sa_mask);
+        sa.sa_flags = SA_RESETHAND;
+        sa.sa_handler = dosigaction;
+        sigaction (SIGHUP,  &sa, NULL);
+        sigaction (SIGTERM, &sa, NULL);
+        sigaction (SIGABRT, &sa, NULL);
+        sigaction (SIGSEGV, &sa, NULL);
 
         /* before do anything we need to make sure we have a working
          * environment.