139 lines
3.3 KiB
Bash
Executable file
139 lines
3.3 KiB
Bash
Executable file
#! /bin/bash
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#
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# cshtobash - convert csh aliases, environment variables, and variables to
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# bash equivalents
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#
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# usage: cshtobash [filename]
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#
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# If filename is given, that file is sourced. Note that csh always
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# sources .cshrc. To recreate your csh login environment, run
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# `cshtobash ~/.login'.
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#
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# Inspired by (and some borrowed from) a similar program distributed with
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# zsh-3.0.
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#
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# Chet Ramey
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# chet@po.cwru.edu
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#
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trap 'rm -f $TMPFILE1 $TMPFILEa $TMPFILEe $TMPFILEv $TMPFILEco $TMPFILEci' 0 1 2 3 6 15
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{ TMPFILE1=$(mktemp -t cb.1.XXXXXX) &&
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TMPFILEa=$(mktemp -t cb.a.XXXXXX) &&
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TMPFILEe=$(mktemp -t cb.e.XXXXXX) &&
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TMPFILEv=$(mktemp -t cb.v.XXXXXX) &&
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TMPFILEco=$(mktemp -t cshout.XXXXXX) &&
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TMPFILEci=$(mktemp -t cshin.XXXXXX)
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} || exit 1
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T=$'\t'
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SOURCE="${1:+source $1}"
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cat << EOF >$TMPFILEci
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$SOURCE
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alias >! $TMPFILEa
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setenv >! $TMPFILEe
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set >! $TMPFILEv
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EOF
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# give csh a minimal environment, similar to what login would provide
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/usr/bin/env - USER=$USER HOME=$HOME PATH=/usr/bin:/bin:/usr/ucb:. TERM=$TERM SHELL=$SHELL /bin/csh -i < $TMPFILEci > $TMPFILEco 2>&1
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# First convert aliases
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cat << \EOF >$TMPFILE1
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mkalias ()
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{
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case $2 in
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'') echo alias ${1}="''" ;;
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*[#\!]*)
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comm=$(echo $2 | sed 's/\!\*/"$\@"/g
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s/\!:\([1-9]\)/"$\1"/g
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s/#/\#/g')
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echo $1 \(\) "{" command "$comm" "; }"
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;;
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*) echo alias ${1}=\'$(echo "${2}" | sed "s:':'\\\\'':")\' ;;
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esac
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}
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EOF
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sed "s/^\([a-zA-Z0-9_]*\)$T\(.*\)$/mkalias \1 '\2'/" < $TMPFILEa >>$TMPFILE1
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echo '# csh aliases'
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echo
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$BASH $TMPFILE1 | sed -e 's/\$cwd/\$PWD/g' \
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-e 's/\$term/\$TERM/g' \
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-e 's/\$home/\$HOME/g' \
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-e 's/\$user/\$USER/g' \
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-e 's/\$prompt/\$PS1/g'
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# Next, convert environment variables
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echo
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echo '# csh environment variables'
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echo
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# Would be nice to deal with embedded newlines, e.g. in TERMCAP, but ...
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sed -e '/^SHLVL/d' \
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-e '/^PWD/d' \
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-e "s/'/'"\\\\"''"/g \
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-e "s/^\([A-Za-z0-9_]*=\)/export \1'/" \
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-e "s/$/'/" < $TMPFILEe
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# Finally, convert local variables
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echo
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echo '# csh variables'
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echo
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sed -e 's/'"$T"'/=/' \
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-e "s/'/'"\\\\"''"/g \
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-e '/^[A-Za-z0-9_]*=[^(]/{
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s/=/='"'/"'
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s/$/'"'/"'
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}' < $TMPFILEv |
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sed -e '/^argv=/d' -e '/^cwd=/d' -e '/^filec=/d' -e '/^status=/d' \
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-e '/^verbose=/d' \
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-e '/^term=/d' \
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-e '/^home=/d' \
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-e '/^path=/d' \
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-e '/^user=/d' \
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-e '/^shell=/d' \
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-e '/^cdpath=/d' \
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-e '/^mail=/d' \
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-e '/^home=/s//HOME=/' \
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-e '/^prompt=/s//PS1=/' \
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-e '/^histfile=/s//HISTFILE=/' \
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-e '/^history=/s//HISTSIZE=/' \
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-e '/^savehist=$/s//HISTFILESIZE=${HISTSIZE-500}/' \
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-e '/^savehist=/s//HISTFILESIZE=/' \
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-e '/^ignoreeof=$/s/^.*$/set -o ignoreeof # ignoreeof/' \
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-e '/^ignoreeof=/s//IGNOREEOF=/' \
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-e '/^noclobber=/s/^.*$/set -C # noclobber/' \
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-e '/^notify=/s/^.*$/set -b # notify/' \
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-e '/^noglob=/s/^.*$/set -f # noglob/' \
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# now some special csh variables converted to bash equivalents
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echo
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echo '# special csh variables converted to bash equivalents'
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echo
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sed -e 's/'"$T"'/=/' < $TMPFILEv |
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grep "^cdpath=" |
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sed 's/(//
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s/ /:/g
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s/)//
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s/cdpath=/CDPATH=/'
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sed -e 's/'"$T"'/=/' < $TMPFILEv |
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grep "^mail=" |
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sed 's/(//
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s/ /:/g
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s/)//
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s/mail=/MAILPATH=/' |
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sed -e 's/MAILPATH=\([0-9][0-9][^:]*\)$/MAILCHECK=\1/' \
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-e 's/MAILPATH=\([0-9][0-9][^:]*\):\(.*\)/MAILCHECK=\1 MAILPATH=\2/'
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exit 0
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