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Re: NSTask failing
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Re: NSTask failing


  • Subject: Re: NSTask failing
  • From: "Herb Petschauer" <email@hidden>
  • Date: Fri, 4 Apr 2008 13:36:42 -0700

On 04/04/2008, Randall Meadows <email@hidden> wrote:
> I'm having problems with what should be a simple NSTask invocation:
>
>  NSArray *args = [NSArray arrayWithObjects:
>    @"-cf",
>    [NSString stringWithFormat:@"\"%@\"", tarFilePath],
>    [NSString stringWithFormat:@"\"%@\"", plistPath],
>    nil];
>  tarTask = [NSTask launchedTaskWithLaunchPath:@"/usr/bin/tar"
> arguments:args];
>  [tarTask waitUntilExit];
>  int status = [tarTask terminationStatus];
>
>  After all that, status = 2.
>
>  I've tried making the arguments only 1 entry in the array, and the same
> thing; I've both quoting and not quoting the arguments, and the same thing;
> I've tried using a dash with the options and without, and the same
> thing--always status=2 (fatal error).
>
>  tarFilePath and plistPath are full paths, and valid ones at that.
>
>  I can take the contents of all that and do it on the command line and that
> works.  What in the world am I missing here that is causing it to fail?

I do something very similar.  The only difference is I'm not
constructing a path via stringWithFormat.  I'm using either NSString's
"fileSystemRepresentation" or NSURL's "path" method to get a well
formed path to pass in as a parameter...

So I wonder what your stringWithFormat results actually look like.

Hey wait... why does your tarFilePath end with a "/", isn't that the
equivalent of doing a

tar cf ~/tmp/archive.tar/ /{blah}/SourceFolder/

???

That will bork for sure...  Also are you sure that plistPath  is a
directory?  It will sure look that way to "tar".

Do try the fileSystemRepresentation method :-)

Cheers,
-H.
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