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Test file script - if evaluation failing

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# 1  
Old 06-10-2013
Test file script - if evaluation failing
I have a following script to evaluate if file exist in the directory and then archive it.

Code:
#!/bin/bash
 
#master directory
scriptdir="/flex/sh/interfaces" #change this path only - all other paths are connected with it
filedir="/flex/interfaces" #change this path only - all other paths are connected with it
#files directory
outputdir="${filedir}/correspondence/outgoing"
outputarchdir="${filedir}/correspondence/outgoing_archive"
#files
output_file="${outputdir}/if_flex_Output.All_*"
Archive_file()
{
#rename original output corp correspondence file and move to archive output directory
cd $outputdir
echo $output_file
echo $outputdir
echo $outputarchdir
#mv $output_file $outputarchdir
if [[ -e $output_file ]]; then
mv $output_file $outputarchdir
printf "Original output corp correspondence file archived\n"
else
printf "Unable to archive original output corp correspondence file\n"
exit 1
fi
}
 
Archive_file

I knew the file name before and used it number of times for different files and it worked but never tried to match filename with 'star' at the end like in this line:

Code:
 
output_file="${outputdir}/if_flex_Output.All_*"

Now I don't know exact file name and I think * cause some issues in if evaluation.

File in directory is called 'if_flex_Output.All_20130405_132723"

Every time I run scrip I'm getting 'Unable to archive original output corp correspondence file'

When I moved
Code:
 
mv $output_file $outputarchdir

above if statement it works fine.

Any idea why??
# 2  
Old 06-10-2013
if [ -f ... ] expects one filename. Not three, not zero, but one and only one.
# 3  
Old 06-10-2013
There is only one file that will resolve from
Code:
output_file="${outputdir}/if_flex_Output.All_*"

Corona688 you are right that if I change code to

Code:
if [ -e $output_file ]; then

it is working as expected.

Question is why it is not working with double brackets while working for other files?

When I remove the timestamp from file and look for

Code:
output_file="${outputdir}/if_flex_Output.All_"

if statement with double brackets also works.

I know how to resolve this issue with above workarounds but looking to understand code behaviour with double brackets.

Thanks
# 4  
Old 06-10-2013
Quote:
Originally Posted by viallos
Question is why it is not working with double brackets while working for other files?
Interesting, I wouldn't have expected that, I thought double vs single brackets was incidental.

The double brackets have different behavior of course, but some of their behavior is shared, and I thought file expansion on unquoted variables was one of them...
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