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#!/bin/sh
# NAME
# stripcr - a program for removing carriage return chars from dos-files.
#
# SYNOPSIS
# stripcr [file...]
#
# DESCRIPTION
# stripcr deletes all CR characters from the given files.
# The files are edited in place.
# If no files are given, stdin and stdout are used instead.
#
# OPTIONS
# -s extension Make a copy of the original of each file, and
# give it the given extension (.bak, .orig, -bak, ...).
#
# EXAMPLES
# stripcr file.txt innerloop.cc
# stripcr -i.bak *.cc
#
# ENVIRONMENT
# NDB_PROJ_HOME Home dir for ndb
#
# FILES
# $NDB_PROJ_HOME/lib/funcs.sh Some userful functions for safe execution
# of commands, printing, and tracing.
#
# VERSION
# 1.0
#
# AUTHOR
# Jonas Mölsä
#
progname=`basename $0`
synopsis="stripcr [-s extension] [file...]"
: ${NDB_PROJ_HOME:?} # If undefined, exit with error message
: ${STRIPCR_OPTIONS:=--} # If undefined, set to --, to keep getopts happy.
# You may have to experiment, to get quoting right.
. $NDB_PROJ_HOME/lib/funcs.sh
# defaults for options related variables
#
extension=
options="$STRIPCR_OPTIONS"
# used if error when parsing the options environment variable
#
env_opterr="options environment variable: <<$options>>"
# We want to be able to set options in an environment variable,
# as well as on the command line. In order not to have to repeat
# the same getopts information twice, we loop two times over the
# getopts while loop. The first time, we process options from
# the options environment variable, the second time we process
# options from the command line.
#
# The things to change are the actual options and what they do.
#
#
for optstring in "$options" "" # 1. options variable 2. cmd line
do
while getopts s: i $optstring # optstring empty => no arg => cmd line
do
case $i in
s) extension="$OPTARG";;
\?) syndie $env_opterr;; # print synopsis and exit
esac
done
[ -n "$optstring" ] && OPTIND=1 # Reset for round 2, cmd line options
env_opterr= # Round 2 should not use the value
done
shift `expr $OPTIND - 1`
safe perl -i$extension -lpe 'tr/\r//d' $*
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