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Top Forums Shell Programming and Scripting Reversing file order using SED Post 29098 by MBGPS on Monday 30th of September 2002 09:16:35 AM
Old 09-30-2002
Reversing file order using SED

Im trying to develop a shell script that will change the content order of the file.

For example I have a file that says
a
b
c
d

I want to change this to be
d
c
b
a

Im trying to use sed to this by reading the file and then inserting each line at the top

#!/usr/bin/ksh

PATCHFILE=patch_order
REVERSE=reverse_
REVERSEPATCHFILE=$REVERSE$PATCHFILE
TMP=.TMP

rm $REVERSEPATCHFILE$TMP

echo got here
while read PATCHNAME; do

sed -e "1i\\
$PATCHNAME" >$REVERSEPATCHFILE$TMP

#mv $REVERSEPATCHFILE$TMP $REVERSEPATCHFILE

done <$PATCHFILE

The problem is it just puts the lines in exactly the same order. Am i missing something?
 

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SHTOOL-FIXPERM.TMP(1)					      GNU Portable Shell Tool					     SHTOOL-FIXPERM.TMP(1)

NAME
shtool-fixperm - GNU shtool file permission fixing command SYNOPSIS
shtool fixperm [-v|--verbose] [-t|--trace] path [path ...] DESCRIPTION
shtool fixperm fixes file permissions inside a source tree under path by cleaning up the permission bits. It determines the cleaned up permission from the already set bits. It is intended to be run before a tarball is rolled (usually with shtool tarball) out of a source tree. The trick is that this is more convenient than having to set the permissions manually or by using a large file list. OPTIONS
The following command line options are available. -v, --verbose Display some processing information. -t, --trace Enable the output of the essential shell commands which are executed. EXAMPLE
# Makefile.in dist: shtool fixperm -v * ... HISTORY
The GNU shtool fixperm command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1996 for OSSP eperl. It was later taken over into GNU shtool. SEE ALSO
shtool(1), chmod(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-FIXPERM.TMP(1)
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