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executable test

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blendmaster345
 PostPosted: Mon Nov 21, 2011 11:42 am   

Joined: Thu Nov 10, 2011 7:31 pm
Posts: 21
I need a script that 1. tests if a file is executable 2. if it is, than exit with status 1, and if it is not, then chmod 777, and then run it with #! /bin/bash -x, and return it to the normal #! /bin/bash when done
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Watael
 PostPosted: Mon Nov 21, 2011 11:53 am   

Joined: Mon Mar 02, 2009 3:03 am
Posts: 591
you need to learn about test builtin.
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jsz
 PostPosted: Mon Nov 21, 2011 11:57 am   
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Joined: Wed Jun 08, 2011 8:27 am
Posts: 189
Location: outer Shpongolia
jsz wrote:
blendmaster345 wrote:
I haven't tried it, but it looks good! I just did not know how to check for existence of a file.


That's part of the basics.

Read the output of the following command:

Code:
help test



You know how to check whether a file is executable.
You know how to exit from a script with a specific status.
You know how to use chmod(1) on a file.

Now, read the output of the set(0) builtin:
Code:
help set


And learn how to execute a script with the -x switch, by yourself.
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