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тАО11-17-2000 01:17 PM
тАО11-17-2000 01:17 PM
I am modifying an existing script, and I have a statement like this:
if [[ -a filename ]] then ....
I have searched and studied and cannot figure out exactly what it means. The documentation tells me that -a is an 'and' operator, but what is it comparing to? Please help, I like to understand what I'm running!
if [[ -a filename ]] then ....
I have searched and studied and cannot figure out exactly what it means. The documentation tells me that -a is an 'and' operator, but what is it comparing to? Please help, I like to understand what I'm running!
No matter where you go, there you are.
Solved! Go to Solution.
3 REPLIES 3
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тАО11-17-2000 01:28 PM
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тАО11-17-2000 01:36 PM
тАО11-17-2000 01:36 PM
Re: test statement in shell script
The "-a" that you are using is used to check an object.
Using "-a" to test an object will test if it exist.
Example:
if [[ -a name_of_filename ]]
then
echo "file exists"
fi
The -a is also the "AND" operator as used in most scripts.
`fnhalili`
Using "-a" to test an object will test if it exist.
Example:
if [[ -a name_of_filename ]]
then
echo "file exists"
fi
The -a is also the "AND" operator as used in most scripts.
`fnhalili`
derekh
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тАО11-17-2000 11:39 PM
тАО11-17-2000 11:39 PM
Re: test statement in shell script
Kofi,
The -a test operator works in posix shell as well
example:
[[ -a filename ]] && echo "file exists"
man posix-sh
Best regards,
Dan
The -a test operator works in posix shell as well
example:
[[ -a filename ]] && echo "file exists"
man posix-sh
Best regards,
Dan
Everybody knows at least one thing worth sharing -- mailto:dan.hetzel@wildcroft.com
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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