Description: Check the return value of `system'.
Author: Yavor Doganov <yavor@gnu.org>
Forwarded: yes
Last-Update: 2014-06-25
---

--- cenon.app.orig/VHFImport/PSImport.m
+++ cenon.app/VHFImport/PSImport.m
@@ -143,7 +143,14 @@
 
     /* convert pdf to eps */
     commandLine = [NSString stringWithFormat:@"%@ -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=epswrite -sOutputFile=%@ -c save pop -f '%@'", [self gsPath], psFile, pdfFile];
-    system([commandLine UTF8String]);
+    if (system([commandLine UTF8String]) != 0)
+      {
+	NSRunAlertPanel(@"Unable to import file",
+			@"An error occured while importing the file.\n"
+			@"Make sure you have ghostscript installed in PATH.",
+			@"OK", nil, nil);
+	return nil;
+      }
 
     /* import ps */
     psData = [NSData dataWithContentsOfFile:psFile];
@@ -330,7 +337,14 @@
     //[data writeToFile:inFile atomically:NO];    // <= 10.4
 
     commandLine = [NSString stringWithFormat:@"%@ -dNODISPLAY -dBATCH -dNOSAFER -g1000x1000 '%@'", [self gsPath], inFile];
-    system([commandLine UTF8String]);
+    if (system([commandLine UTF8String]) != 0)
+      {
+	NSRunAlertPanel(@"Unable to import file",
+			@"An error occured while importing the file.\n"
+			@"Make sure you have ghostscript installed in PATH.",
+			@"OK", nil, nil);
+	return nil;
+      }
 
     /* load generated file */
     //data = [[[NSString alloc] initWithContentsOfFile:outFile] autorelease];