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jim.thornton

04-08-2008 09:25 PM

Syntax Question for scripting - if conditions

I'm getting a syntax error with this and was hoping for some help please:

if [[ -e $4 ] && [ "$overwrite_flag" != 0 ]] || [ -!e $4 ]

I'm trying to say:

(If file ($4) exists AND the overwrite flag is set) OR (If the $4 file does NOT exist) THEN ....

Can someone please tell me what i'm doing wrong?

PatrickNew

04-08-2008 09:41 PM

I would put the last condition first. The problem is that you can't really nest []'s
So maybe this:

Code:

if [-!e $4 ] || [ -e $4 ] && [ "$overwrite_flag" != 0 ]

Jay_Drummond

04-08-2008 09:51 PM

Code:

#!/bin/sh



overwrite_flag=1



if [ -e $4 ] && [ "$overwrite_flag" != 0 ] || [ ! -e $4 ] 

then 

  echo 'overwrite ok '$4

else 

  echo 'no overwrite'

fi

I tested it, so I'm certain that this one works.

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