I have a script in which the file name is always known, but the extension could vary. I want to be able to use a single variable; no if-else statements. For example, if I have
Code:
config.txt
in the directory then that's what I want to use, but if
Code:
config.xml
is in the directory then use that. The point being,
To traverse through all the .txt and .xml files, then following may help you in same.
Code:
for file in *.{txt,xml}; do echo $file; done
OR
for file in *.{txt,xml}
do
echo $file
done
OR (EDIT)
perl -e '
$DIR="/path/to/check";
@a= glob "${DIR}/*.txt";
@b= glob "${DIR}/*.xml";
print @a ? "Found txt file.\n" : "Not found txt file.\n";
print @b ? "Found xml file.\n" : "Not found xml file.\n"
'
In above code I am not using any file name you could add file first name in it. Also I am simply printing the Input_file names, you could do operations as per your requirement too. If you have some other requirement then please do let us know it with complete details.
EDIT: Added a perl code above too.
Thanks,
R. Singh
Last edited by RavinderSingh13; 05-26-2016 at 11:55 AM..
Reason: Added a perl code now too.
I have an awk script which does string replacement based on an input xml and a properties file; this script returns the same xml with updated values.
The input xml can either be
Code:
config.xml
or
Code:
config.xml.bak
. (I mentioned txt and xml before but it doesn't matter).
In my main script I want to define a variable such that any config extension type can be accepted, since only xml or xml.bak will be present in the directory.
Thanks Ravinder, but I don't wish to traverse any files.
I will only have
Code:
.txt
OR
Code:
.xml
file in my directory at any point in time (one or the other). In the script, I want to assign a variable which will be general enough to accept a file name such as
Code:
config.txt
OR
Code:
config.xml
.
How can I assign a shell variable to accept something like
Code:
file=/home/config.<txt,xml>
Hello ocbit,
I am still unsure about your complete requirement. I am still assuming like you need to check file's status only either it is present or not. If yes, then why not create 2 variables and check their status like as follows.
Code:
file_txt=/my/path/config.txt
file_xml=/my/path/config.xml
if [[ -f $file_txt ]]; then echo $file_txt " is present."; fi
if [[ -f $file_xml ]]; then echo $file_txt " is present."; fi
You could take it above as a start and try, if you have more requirements then please be more precise into them and show us sample Input_file with expected output.
EDIT: Seems you have updated your post now, still I am not that much sure about your requirement but seeing your code assuming following things you could do.
I- No need to call a separate script within script, you could directly call that awk command there itself, not sure if that has more than command, if no then you could directly mention command there and pass arguments.
II- You could still avoid creating mess of a variable having 2 extensions by creating 1 single variable which has directory name and then could check 2 files differently too.
Following could be the code but it is based of lot of assumptions.
Code:
#!/bin/sh
deploymentXML=/home/Config
properties=/home/prop.txt
if [[ -f $deploymentXML".xml" ]]
then
VAL=deploymentXML".xml"
fi
if [[ -f $deploymentXML".xml.bak" ]]
then
VAL=deploymentXML".xml.bak"
fi
awk '{}' "$properties" $VAL
Thanks,
R. Singh
Last edited by RavinderSingh13; 05-26-2016 at 12:35 PM..
Reason: Adding comments as user changed his/her post.
This User Gave Thanks to RavinderSingh13 For This Post:
If you know that exactly one of /home/config.txt and /home/config.xml exist and that /home/config.* does not match any other filename extension, you could use:
Code:
file=$(echo /home/config.[tx][xm][tl])
without using any if statements, but:
Code:
if [ -f /home/config.txt ]
then file=/home/config.txt
else file=/home/config.xml
fi
will be faster (considerably faster in a large directory) because no subshell environment needs to be created for the command substitution and a single stat() system call will be faster than searching an entire directory for possible matching filenames to determine which of the two names is present.
.
.
.
since only xml or xml.bak will be present in the directory.
.
.
.
then /home/config.* will do what you need.
/home/Config.{xml,xml.bak} is a construct that recent shells (like bash, which you may or may not use) will expand to /home/Config.xml /home/Config.xml.bak - exactly what * with above conditions would yield.
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