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1. Run an external script

   #import <Foundation/Foundation.h>
   
   int main (int argc, const char * argv[]) {
       NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
   
       NSFileManager *fileManager = [NSFileManager defaultManager];
   
       CFUUIDRef uuid = CFUUIDCreate(NULL);
       NSString *uniqueString = (NSString *)CFUUIDCreateString(NULL, uuid);
       CFRelease(uuid);
   
       NSString *tempFile = [NSString pathWithComponents:
           [NSArray arrayWithObjects: NSTemporaryDirectory(), uniqueString, nil]];
       [fileManager createFileAtPath:tempFile contents:nil attributes:nil];
       NSFileHandle *file = [NSFileHandle fileHandleForWritingAtPath:tempFile];
   
       NSTask *task = [[NSTask alloc] init];
       [task setLaunchPath:@"/usr/bin/perl"];
       [task setArguments:
           [NSArray arrayWithObjects:@"/Users/nst/bin/iso2txt",
                                     @"/Users/nst/Desktop/asd.iso2709",
                                     nil]];
       [task setStandardOutput:file];
       [task launch];
       [task waitUntilExit];
       [task release];
   
       NSLog([NSString stringWithContentsOfFile:tempFile]);
   
       [fileManager removeFileAtPath:tempFile handler:nil];
   
       [pool release];
       return 0;
   }