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Full Discussion: Simple 'sed' script for replacing text
Top Forums Shell Programming and Scripting Simple 'sed' script for replacing text Post 302277231 by cfajohnson on Thursday 15th of January 2009 06:03:57 PM
Old 01-15-2009
Quote:
Originally Posted by ScKaSx
I wrote the following simple script (rptxt.sh):
Code:
#! /bin/bash
sed -e 's/$1/$2/' -i $3

My intention was to make it a commandline program,
Code:
rptxt OLDtext NEWtext file(s)

.
However when I run this it does replace the text and only looks in the first file (if multiple files are entered such as *.txt). Any ideas why, and how it can be fixed? Thanks.

That script would not replace anything but a literal $1, and it would replace it with a literal $2. And (after replacing the single quotes with double quotes) it will only work with GNU sed. And it will break if $3 contains a space or wildcard character. Or if either $1 or $2 contains a slash.

Code:
#!/bin/bash
search=${1//\//\\/}
replace=${2//\//\\/}
shift 2
sed -i "s/$search/$replace/g" "$@"

Last edited by cfajohnson; 01-15-2009 at 07:46 PM..
 

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LEARN ABOUT CENTOS

git-replace

GIT-REPLACE(1)							    Git Manual							    GIT-REPLACE(1)

NAME

       git-replace - Create, list, delete refs to replace objects

SYNOPSIS

       git replace [-f] <object> <replacement>
       git replace -d <object>...
       git replace -l [<pattern>]

DESCRIPTION

       Adds a replace reference in refs/replace/ namespace.

       The name of the replace reference is the SHA-1 of the object that is replaced. The content of the replace reference is the SHA-1 of the
       replacement object.

       Unless -f is given, the replace reference must not yet exist.

       Replacement references will be used by default by all Git commands except those doing reachability traversal (prune, pack transfer and
       fsck).

       It is possible to disable use of replacement references for any command using the --no-replace-objects option just after git.

       For example if commit foo has been replaced by commit bar:

	   $ git --no-replace-objects cat-file commit foo

       shows information about commit foo, while:

	   $ git cat-file commit foo

       shows information about commit bar.

       The GIT_NO_REPLACE_OBJECTS environment variable can be set to achieve the same effect as the --no-replace-objects option.

OPTIONS

       -f
	   If an existing replace ref for the same object exists, it will be overwritten (instead of failing).

       -d
	   Delete existing replace refs for the given objects.

       -l <pattern>
	   List replace refs for objects that match the given pattern (or all if no pattern is given). Typing "git replace" without arguments,
	   also lists all replace refs.

BUGS

       Comparing blobs or trees that have been replaced with those that replace them will not work properly. And using git reset --hard to go back
       to a replaced commit will move the branch to the replacement commit instead of the replaced commit.

       There may be other problems when using git rev-list related to pending objects. And of course things may break if an object of one type is
       replaced by an object of another type (for example a blob replaced by a commit).

SEE ALSO

       git-tag(1) git-branch(1) git(1)

GIT

       Part of the git(1) suite

Git 1.8.3.1							    06/10/2014							    GIT-REPLACE(1)
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