Im facing a weird behavior storing regular expression in a vaiable.
Let us consider
Code:
>file_name=CTP02_[0-9]*.tar
when I echo the above variable its displaying below which is file
Code:
CTP02_[0-9]*tar
but when I create a file with name CTP02_1234.tar, and when I echo $file_name its showing CTP02_1234.tar not CTP02_[0-9]*tar.gz Why this issue ? How to overcome ? I need to need to use this in grep
My scenario is, to find the number of files which are of type CTP02_[0-9]*.tar in a folder.
Appreciate your help
Thanks
Last edited by Don Cragun; 08-14-2015 at 05:39 PM..
Reason: Add CODE and ICODE tags.
Note that you don't grep a folder (usually called a directory in UNIX and Linux environments). The grep utility searches for text in the contents of text files (not directories on most systems).
If you're trying to count the number of files in a directory that have names matching the globbing pattern stored in your shell variable named (confusingly) file_name, you could try something like:
Code:
ls $file_name | wc -l
which should work as long as there aren't any newline characters in your file names. If you have users who create filenames containing newline characters, or if you just want to use shell built-ins, a fast way to get what you want is:
Code:
set -- $file_name
echo $#
(assuming that you aren't using command line arguments or have already gathered what you need from them, and assuming that at least one file matching your pattern exists) or, if there might not be any matching files (but there also might be a file with a name that is your pattern):
Code:
set -- $file_name
if [ "$file_name" = "$1" ] && [ ! -e "$1" ]
then echo 0
else echo $#
fi
I'm trying to use a series of regular expressions as variables but can't get it to behave properly.
You can see below what I'm trying to do.
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hello,
I use AIX with ISM PILOT, I want to match something with a varible like this :
$variable = 10 #this variable is the number of the job
"$variable STARTED" # the pattern
how can use this variable to match it with the word STARTED
Tanks (0 Replies)
