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Re: File exists on a posix path
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Re: File exists on a posix path


  • Subject: Re: File exists on a posix path
  • From: Christopher Nebel <email@hidden>
  • Date: Tue, 14 Feb 2006 09:14:54 -0800

On Feb 13, 2006, at 7:08 AM, Adam Bell wrote:

In 10.4.4 at least, I had to modify the first shell script as follows to deal with folder names or file names with spaces in them:

return (((do shell script ("if test -e " & "'" & thefile & "'" & " ; then echo 1 ; else echo 0 ; fi" as string)) as integer) as boolean)

Note: I just moved the single quotes which wouldn't compile inside the first quoted string. Using 'quoted form of' might be better.

It unquestionably is better, because it will deal correctly with paths that have single quotes in them, unlike yours. Never attempt to do your own quoting; I guarantee your code will fail for some cases.


To answer Gnarlie's question, test(1) doesn't return anything, in the sense that it doesn't generate any output. Its success or failure is signaled by its exit status, which means to test it in shell you need either an "if" block or its moral equivalent "&&" and "||". For example, these two are equivalent:

	if test -e $thefile ; then echo 1 ; else echo 0 ; fi

	if test -e $thefile && echo 1 || echo 0

Of course, Gnarlie's observation that you can "echo $?" instead is even shorter.


--Chris Nebel AppleScript and Automator Engineering

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References: 
 >Re: File exists on a posix path (From: Gnarlodious <email@hidden>)
 >Re: File exists on a posix path (From: Christopher Nebel <email@hidden>)
 >Re: File exists on a posix path (From: Bastiaan Boertien <email@hidden>)
 >Re: File exists on a posix path (From: Adam Bell <email@hidden>)

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