Fix restarting aegisub on osx, this uses scripts/osx-bundle-restart-helper.c

(written by jfs) to restart aegisub when it actually quites using KQUEUE to
monitor the process until it dies then executing /usr/bin/open <bundle_path>

Originally committed to SVN as r2689.

aegisub/utils.cpp

@@ -396,9 +396,11 @@ void RestartAegisub() {
 	wxExecute(_T("\"") + stand.GetExecutablePath() + _T("\""));
 #elif defined(__WXMAC__)
 	char *bundle_path = OSX_GetBundlePath();
-	if (!bundle_path) return; // oops
+	char *support_path = OSX_GetBundleSupportFilesDirectory();
-	wxExecute(wxString::Format(_T("/usr/bin/open \"%s\""), wxString(bundle_path, wxConvUTF8)));
+	if (!bundle_path || !support_path) return; // oops
-	free(bundle_path);
+	wxExecute(wxString::Format(_T("%s/MacOS/restart-helper /usr/bin/open \"%s\""), wxString(support_path, wxConvUTF8).c_str(), wxString(bundle_path, wxConvUTF8).c_str()));
+	free(bundle_path);  
+	free(support_path);
 #else
 	wxStandardPaths stand;
 	wxExecute(stand.GetExecutablePath());

scripts/osx-bundle-restart-helper.c

@@ -0,0 +1,91 @@
+/*
+  Copyright (c) 2009 Niels Martin Hansen
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+  * Neither the name of the Aegisub Group nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/time.h>
+
+/*
+Return codes:
+1: Error in kqueue()
+2: Error in kevent()
+3: Timed out waiting for parent to exit
+4: Error in execve()
+
+If none of those happen the requested command is execve()'d.
+*/
+int main(int argc, char *argv[], char *env[])
+{
+	int waitpid = getppid();
+	int queue, nchange;
+	struct kevent event[1];
+	struct kevent change[1];
+	struct timespec timeout = { 30, 0 };
+
+	if ((queue = kqueue()) == -1)
+	{
+		perror("kqueue()");
+		return 1;
+	}
+
+	EV_SET(event,
+	       waitpid,
+	       EVFILT_PROC,
+	       EV_ADD|EV_ENABLE|EV_ONESHOT,
+	       NOTE_EXIT,
+	       0, 0);
+
+	nchange = kevent(queue, change, 1, event, 1, &timeout);
+	if (nchange < 0)
+	{
+		perror("kevent()");
+		return 2;
+	}
+	else if (nchange == 0)
+	{
+		return 3;
+	}
+	else if (change[0].flags & EV_ERROR)
+	{
+		return 2;
+	}
+	else
+	{
+		close(queue);
+		if (execve(argv[1], argv+1, env) == -1)
+		{
+			perror("execve()");
+			return 4;
+		}
+		return 0; /* never reached */
+	}
+}
+

scripts/osx-bundle.sh

@@ -4,6 +4,7 @@ PKG_DIR=${1}.app
 SKEL_DIR="packages/osx_bundle"
 AEGISUB_VERSION_DATA="${2}"
 SRCDIR=`pwd`
+CC?=cc
 
 if ! test -d packages/osx_bundle; then
   echo
@@ -62,6 +63,8 @@ done
 echo
 echo "---- Binaries ----"
 cp -v aegisub/.libs/aegisub-${AEGISUB_VERSION_DATA} ${PKG_DIR}/Contents/MacOS/aegisub
+echo cc -o ${PKG_DIR}/Contents/MacOS/restart-helper scripts/osx-bundle-restart-helper.c
+${CC} -o ${PKG_DIR}/Contents/MacOS/restart-helper scripts/osx-bundle-restart-helper.c
 
 echo
 echo "---- Libraries ----"