X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fmodules%2Fmod_imagemagick%2Fmptr_imagemagick.cpp;h=4d7ca2063f8ad7c795520f7060e79279afdacd03;hb=9bb17dbd43d0988caab3a1fa420aa52a32e4fdc5;hp=8e35ac9d2faa0e9999a7f568a2f3dc5e460a01dd;hpb=5ddcf36f04cfbd10fabda4e3c5633cb27cdd4c0a;p=synfig.git

diff --git a/synfig-core/trunk/src/modules/mod_imagemagick/mptr_imagemagick.cpp b/synfig-core/trunk/src/modules/mod_imagemagick/mptr_imagemagick.cpp
index 8e35ac9..4d7ca20 100644
--- a/synfig-core/trunk/src/modules/mod_imagemagick/mptr_imagemagick.cpp
+++ b/synfig-core/trunk/src/modules/mod_imagemagick/mptr_imagemagick.cpp
@@ -1,8 +1,10 @@
-/*! ========================================================================
-** Synfig
-** ppm Target Module
-** $Id: mptr_imagemagick.cpp,v 1.1.1.1 2005/01/04 01:23:11 darco Exp $
+/* === S Y N F I G ========================================================= */
+/*!	\file mptr_imagemagick.cpp
+**	\brief ppm Target Module
 **
+**	$Id$
+**
+**	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
 **
 **	This package is free software; you can redistribute it and/or
@@ -14,6 +16,7 @@
 **	but WITHOUT ANY WARRANTY; without even the implied warranty of
 **	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 **	General Public License for more details.
+**	\endlegal
 **
 ** === N O T E S ===========================================================
 **
@@ -31,6 +34,9 @@
 #include <ETL/stringf>
 #include "mptr_imagemagick.h"
 #include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
 #include <algorithm>
 #include <functional>
 #include <ETL/stringf>
@@ -50,7 +56,7 @@ SYNFIG_IMPORTER_INIT(imagemagick_mptr);
 SYNFIG_IMPORTER_SET_NAME(imagemagick_mptr,"imagemagick");
 SYNFIG_IMPORTER_SET_EXT(imagemagick_mptr,"miff");
 SYNFIG_IMPORTER_SET_VERSION(imagemagick_mptr,"0.1");
-SYNFIG_IMPORTER_SET_CVS_ID(imagemagick_mptr,"$Id: mptr_imagemagick.cpp,v 1.1.1.1 2005/01/04 01:23:11 darco Exp $");
+SYNFIG_IMPORTER_SET_CVS_ID(imagemagick_mptr,"$Id$");
 
 /* === M E T H O D S ======================================================= */
 
@@ -69,16 +75,11 @@ imagemagick_mptr::~imagemagick_mptr()
 }
 
 bool
-imagemagick_mptr::get_frame(synfig::Surface &surface,Time time, synfig::ProgressCallback *cb)
+imagemagick_mptr::get_frame(synfig::Surface &surface,Time /*time*/, synfig::ProgressCallback *cb)
 {
 //#define HAS_LIBPNG 1
 
 #if 1
-	if(file)
-		pclose(file);
-
-	string command;
-
 	if(filename.empty())
 	{
 		if(cb)cb->error(_("No file to load"));
@@ -86,15 +87,27 @@ imagemagick_mptr::get_frame(synfig::Surface &surface,Time time, synfig::Progress
 		return false;
 	}
 	string temp_file="/tmp/deleteme.png";
+	string output="png32:"+temp_file;
 
-	if(filename.find("psd")!=String::npos)
-		command=strprintf("convert \"%s\" -flatten \"png32:%s\"\n",filename.c_str(),temp_file.c_str());
-	else
-		command=strprintf("convert \"%s\" \"png32:%s\"\n",filename.c_str(),temp_file.c_str());
-
-	synfig::info("command=%s",command.c_str());
+	pid_t pid = fork();
+  
+	if (pid == -1) {
+		return false;
+	}
+  
+	if (pid == 0){
+		// Child process
+		if(filename.find("psd")!=String::npos)
+			execlp("convert", "convert", filename.c_str(), "-flatten", output.c_str(), (const char *)NULL);
+		else
+			execlp("convert", "convert", filename.c_str(), output.c_str(), (const char *)NULL);
+		// We should never reach here unless the exec failed
+		return false;
+	}
 
-	if(system(command.c_str())!=0)
+	int status;
+	waitpid(pid, &status, 0);
+	if( (WIFEXITED(status) && WEXITSTATUS(status) != 0) || !WIFEXITED(status) )
 		return false;
 
 	Importer::Handle importer(Importer::open(temp_file));
@@ -156,6 +169,9 @@ imagemagick_mptr::get_frame(synfig::Surface &surface,Time time, synfig::Progress
 	return true;
 
 #else
+	
+#error This code contains tempfile and arbitrary shell command execution vulnerabilities
+	
 	if(file)
 		pclose(file);
 
@@ -170,7 +186,7 @@ imagemagick_mptr::get_frame(synfig::Surface &surface,Time time, synfig::Progress
 
 	command=strprintf("convert \"%s\" -flatten ppm:-\n",filename.c_str());
 
-	file=popen(command.c_str(),"r");
+	file=popen(command.c_str(),POPEN_BINARY_READ_TYPE);
 
 	if(!file)
 	{