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Full Discussion: grep a variable
Top Forums Shell Programming and Scripting grep a variable Post 302242357 by sgstuart on Wednesday 1st of October 2008 06:56:54 PM
Old 10-01-2008
grep a variable

Hi all,
I am trying to do a simple thing in my mind. However I am fairly new to bash. What I need to do is create a folder for each partition on each CD, and each partition has a unique name (with spaces in it, do not ask why, it is already done Smilie ) . All CD's will show up under disk1s. So what I have done is create a script that will grab the name, assuming that there is only 1 partition (which I never knew anyone would create partitions on a CD).

So my script write now is

if [-z `diskutil list | grep disk1s0 | awk '{print$3}' ] ; then
Name = `diskutil list | grep disk1s1s2 | awk '{print$3}'
T1 = "Mass"
if[$T1 = $Name]; then
echo `diskutil list | grep disk1s1s2 | awk '{print$3 " " $4}'
else
echo `diskutil list | grep disk1s1s2 | awk '{print$3}'
fi
else
echo `diskutil list | grep disk1s0 | awk '{print$3}'
fi


what I need to add is if the disk1s1s2 name starts with Mass is I need it to look at the name of possibily multiple partitions
echo `diskutil list | grep disk1s1s2 | awk '{print$3 " " $4}'
echo `diskutil list | grep disk1s2s2 | awk '{print$3 " " $4}'
echo `diskutil list | grep disk1s3s2 | awk '{print$3 " " $4}'
echo `diskutil list | grep disk1s4s2 | awk '{print$3 " " $4}'
echo `diskutil list | grep disk1s5s2 | awk '{print$3 " " $4}'
and so on, I have seen at least 10, but there could be more, and could be less.
How would I script for this? Any help would be great.

Thanks,
Steven Stuart
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for a pattern SYNOPSIS
grep [ option ... ] pattern [ file ... ] DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output. The options are -c Print only a count of matching lines. -h Do not print file name tags (headers) with output lines. -i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre- tation. Matched lines are printed in their original form. -l (ell) Print the names of files with selected lines; don't print the lines. -L Print the names of files with no selected lines; the converse of -l. -n Mark each printed line with its line number counted in its file. -s Produce no output, but return status. -v Reverse: print lines that do not match the pattern. Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name argument.) Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in single quotes '...'. SOURCE
/sys/src/cmd/grep.c SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(6) DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs. GREP(1)
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