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