[PATCH] Delete stale pid file on cygwin.

[Yaakov Selkowitz]

---
 bus/bus.c    |   20 ++++++++++++++++++++
 configure.in |    4 ++++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/bus/bus.c b/bus/bus.c
index 1f8994c..b8ef616 100644
--- a/bus/bus.c
+++ b/bus/bus.c
@@ -36,6 +36,7 @@
 #include <dbus/dbus-hash.h>
 #include <dbus/dbus-credentials.h>
 #include <dbus/dbus-internals.h>
+#include <signal.h>
 
 struct BusContext
 {
@@ -311,10 +312,29 @@ process_config_first_time_only (BusContext       *context,
 
       if (_dbus_stat (&u, &stbuf, NULL))
         {
+#ifdef DBUS_CYGWIN
+          DBusString p;
+          long /* int */ pid;
+
+          _dbus_string_init (&p);
+          _dbus_file_get_contents(&p, &u, NULL);
+          _dbus_string_parse_int(&p, 0, &pid, NULL);
+          _dbus_string_free(&p);
+
+          if ((kill((int)pid, 0))) {
+            dbus_set_error(NULL, DBUS_ERROR_FILE_EXISTS,
+                           "pid %ld not running, removing stale pid file\n",
+                           pid);
+            _dbus_delete_file(&u, NULL);
+          } else {
+#endif
           dbus_set_error (error, DBUS_ERROR_FAILED,
 		                  "The pid file \"%s\" exists, if the message bus is not running, remove this file",
                           pidfile);
 	      goto failed;
+#ifdef DBUS_CYGWIN
+          }
+#endif
         }
     }
 
diff --git a/configure.in b/configure.in
index 733fe58..ad849c7 100644
--- a/configure.in
+++ b/configure.in
@@ -110,10 +110,14 @@ if test "$dbus_win" = yes; then
 else
     AC_DEFINE(DBUS_UNIX,1,[Defined if we run on a Unix-based system])
 fi
+if test "$dbus_cygwin" = yes; then
+    AC_DEFINE(DBUS_CYGWIN,1,[Defined if we run on a cygwin API based system])
+fi
 
 AM_CONDITIONAL(DBUS_WIN, test "$dbus_win" = yes)
 AM_CONDITIONAL(DBUS_WINCE, test "$dbus_wince" = yes)
 AM_CONDITIONAL(DBUS_UNIX, test "$dbus_unix" = yes)
+AM_CONDITIONAL(DBUS_CYGWIN, test "$dbus_cygwin" = yes)
 
 AC_ARG_ENABLE(tests, AS_HELP_STRING([--enable-tests],[enable unit test code]),enable_tests=$enableval,enable_tests=$USE_MAINTAINER_MODE)
 AC_ARG_ENABLE(ansi, AS_HELP_STRING([--enable-ansi],[enable -ansi -pedantic gcc flags]),enable_ansi=$enableval,enable_ansi=no)
-- 
1.5.6.5


--------------080408000804030905000500--