cups/cups-dbus-notifier.patch
2013-11-14 17:58:25 +00:00

104 lines
2.4 KiB
Diff

diff -up cups-1.5.4/notifier/dbus.c.dbus-notifier cups-1.5.4/notifier/dbus.c
--- cups-1.5.4/notifier/dbus.c.dbus-notifier 2013-11-14 17:56:35.585486017 +0000
+++ cups-1.5.4/notifier/dbus.c 2013-11-14 17:58:09.964108754 +0000
@@ -4,7 +4,7 @@
* D-Bus notifier for CUPS.
*
* Copyright 2008-2011 by Apple Inc.
- * Copyright (C) 2011 Red Hat, Inc.
+ * Copyright (C) 2011, 2013 Red Hat, Inc.
* Copyright (C) 2007 Tim Waugh <twaugh@redhat.com>
* Copyright 1997-2005 by Easy Software Products.
*
@@ -156,9 +156,16 @@ enum
/*
+ * Global variables...
+ */
+
+static char lock_filename[1024]; /* Lock filename */
+
+/*
* Local functions...
*/
+static void release_lock(void);
static int acquire_lock(int *fd, char *lockfile, size_t locksize);
static const char *validate_utf8(const char *str);
@@ -250,8 +257,6 @@ main(int argc, /* I - Number of comm
DBusMessage *message; /* Message to send */
DBusMessageIter iter; /* Iterator for message data */
int lock_fd = -1; /* Lock file descriptor */
- char lock_filename[1024];
- /* Lock filename */
/*
@@ -628,7 +633,7 @@ main(int argc, /* I - Number of comm
if (lock_fd >= 0)
{
close(lock_fd);
- unlink(lock_filename);
+ release_lock();
}
return (0);
@@ -636,6 +641,26 @@ main(int argc, /* I - Number of comm
/*
+ * 'release_lock()' - Release the singleton lock.
+ */
+
+static void
+release_lock(void)
+{
+ unlink(lock_filename);
+}
+
+
+/*
+ * 'handle_sigterm()' - Handle SIGTERM signal.
+ */
+static void
+handle_sigterm(int signum)
+{
+ release_lock();
+}
+
+/*
* 'acquire_lock()' - Acquire a lock so we only have a single notifier running.
*/
@@ -644,7 +669,8 @@ acquire_lock(int *fd, /* O - Lock fi
char *lockfile, /* I - Lock filename buffer */
size_t locksize) /* I - Size of filename buffer */
{
- const char *tmpdir; /* Temporary directory */
+ const char *tmpdir; /* Temporary directory */
+ struct sigaction action; /* POSIX sigaction data */
/*
@@ -662,8 +688,16 @@ acquire_lock(int *fd, /* O - Lock fi
if ((*fd = open(lockfile, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR)) < 0)
return (-1);
- else
- return (0);
+
+ /*
+ * Set a SIGTERM handler to make sure we release the lock if the
+ * scheduler decides to stop us.
+ */
+ memset(&action, 0, sizeof(action));
+ action.sa_handler = handle_sigterm;
+ sigaction(SIGTERM, &action, NULL);
+
+ return (0);
}