09-11-2009
Passing unix command to "sed"
I am trying a simple sed to replace a pattern but it fails ,,c an someone help in where iam wrong, here is what i run and i get no o/p
a=`cat abc.sh | grep -i pattern1 | egrep -iv "pattern2" `
sed 's/`echo $a`/XYZ=newvalue/g' < abc.sh > abc.sh_new
This is how my ksh -x of teh script looks like:
+ + cat abc.sh
+ grep -i pattern1
+ egrep -iv pattern2
a=XYZ=value
+ sed s/`echo $a` /$Env_TARGET_TARGET_DATABASE=$Tdb/g
+ 0< /tmp/scm_dir/IPA/env.sh 1> /tmp/scm_dir/IPA/env.sh_new
i also tried
sed 's/`cat abc.sh | grep -i pattern1 | egrep -iv "pattern2" `/XYZ=newvalue/g' < abc.sh > abc.sh_new
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LEARN ABOUT NETBSD
zfgrep
ZGREP(1) BSD General Commands Manual ZGREP(1)
NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files
SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...]
zegrep [grep-flags] [--] pattern [file ...]
zfgrep [grep-flags] [--] pattern [file ...]
DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).
The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern
argument.
zegrep calls egrep(1), while zfgrep calls fgrep(1).
EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.
SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)
AUTHORS
Thomas Klausner <wiz@NetBSD.org>
BSD
December 28, 2003 BSD