| 1 | #! /bin/bash
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| 2 | #
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| 3 | # cshtobash - convert csh aliases, environment variables, and variables to
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| 4 | # bash equivalents
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| 5 | #
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| 6 | # usage: cshtobash [filename]
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| 7 | #
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| 8 | # If filename is given, that file is sourced. Note that csh always
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| 9 | # sources .cshrc. To recreate your csh login environment, run
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| 10 | # `cshtobash ~/.login'.
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| 11 | #
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| 12 | # Inspired by (and some borrowed from) a similar program distributed with
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| 13 | # zsh-3.0.
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| 14 | #
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| 15 | # Chet Ramey
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| 16 | # chet@po.cwru.edu
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| 17 | #
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| 18 | trap 'rm -f /tmp/cb$$.? cshout cshin' 0 1 2 3 6 15
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| 19 |
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| 20 | T=$'\t'
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| 21 |
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| 22 | SOURCE="${1:+source $1}"
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| 23 |
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| 24 | cat << EOF >cshin
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| 25 | $SOURCE
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| 26 | alias >! /tmp/cb$$.a
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| 27 | setenv >! /tmp/cb$$.e
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| 28 | set >! /tmp/cb$$.v
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| 29 | EOF
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| 30 |
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| 31 | # give csh a minimal environment, similar to what login would provide
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| 32 | /usr/bin/env - USER=$USER HOME=$HOME PATH=/usr/bin:/bin:/usr/ucb:. TERM=$TERM SHELL=$SHELL /bin/csh -i < ./cshin > cshout 2>&1
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| 33 |
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| 34 | # First convert aliases
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| 35 |
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| 36 | cat << \EOF >/tmp/cb$$.1
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| 37 | mkalias ()
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| 38 | {
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| 39 | case $2 in
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| 40 | '') echo alias ${1}="''" ;;
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| 41 | *[#\!]*)
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| 42 | comm=$(echo $2 | sed 's/\!\*/"$\@"/g
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| 43 | s/\!:\([1-9]\)/"$\1"/g
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| 44 | s/#/\#/g')
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| 45 | echo $1 \(\) "{" command "$comm" "; }"
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| 46 | ;;
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| 47 | *) echo alias ${1}=\'$(echo "${2}" | sed "s:':'\\\\'':")\' ;;
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| 48 | esac
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| 49 | }
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| 50 | EOF
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| 51 |
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| 52 | sed "s/^\([a-zA-Z0-9_]*\)$T\(.*\)$/mkalias \1 '\2'/" < /tmp/cb$$.a >>/tmp/cb$$.1
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| 53 |
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| 54 | echo '# csh aliases'
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| 55 | echo
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| 56 |
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| 57 | $BASH /tmp/cb$$.1 | sed -e 's/\$cwd/\$PWD/g' \
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| 58 | -e 's/\$term/\$TERM/g' \
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| 59 | -e 's/\$home/\$HOME/g' \
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| 60 | -e 's/\$user/\$USER/g' \
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| 61 | -e 's/\$prompt/\$PS1/g'
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| 62 |
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| 63 | # Next, convert environment variables
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| 64 | echo
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| 65 | echo '# csh environment variables'
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| 66 | echo
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| 67 |
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| 68 | # Would be nice to deal with embedded newlines, e.g. in TERMCAP, but ...
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| 69 | sed -e '/^SHLVL/d' \
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| 70 | -e '/^PWD/d' \
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| 71 | -e "s/'/'"\\\\"''"/g \
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| 72 | -e "s/^\([A-Za-z0-9_]*=\)/export \1'/" \
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| 73 | -e "s/$/'/" < /tmp/cb$$.e
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| 74 |
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| 75 | # Finally, convert local variables
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| 76 | echo
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| 77 | echo '# csh variables'
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| 78 | echo
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| 79 |
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| 80 | sed -e 's/'"$T"'/=/' \
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| 81 | -e "s/'/'"\\\\"''"/g \
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| 82 | -e '/^[A-Za-z0-9_]*=[^(]/{
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| 83 | s/=/='"'/"'
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| 84 | s/$/'"'/"'
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| 85 | }' < /tmp/cb$$.v |
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| 86 | sed -e '/^argv=/d' -e '/^cwd=/d' -e '/^filec=/d' -e '/^status=/d' \
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| 87 | -e '/^verbose=/d' \
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| 88 | -e '/^term=/d' \
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| 89 | -e '/^home=/d' \
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| 90 | -e '/^path=/d' \
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| 91 | -e '/^user=/d' \
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| 92 | -e '/^shell=/d' \
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| 93 | -e '/^cdpath=/d' \
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| 94 | -e '/^mail=/d' \
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| 95 | -e '/^home=/s//HOME=/' \
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| 96 | -e '/^prompt=/s//PS1=/' \
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| 97 | -e '/^histfile=/s//HISTFILE=/' \
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| 98 | -e '/^history=/s//HISTSIZE=/' \
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| 99 | -e '/^savehist=$/s//HISTFILESIZE=${HISTSIZE-500}/' \
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| 100 | -e '/^savehist=/s//HISTFILESIZE=/' \
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| 101 | -e '/^ignoreeof=$/s/^.*$/set -o ignoreeof # ignoreeof/' \
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| 102 | -e '/^ignoreeof=/s//IGNOREEOF=/' \
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| 103 | -e '/^noclobber=/s/^.*$/set -C # noclobber/' \
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| 104 | -e '/^notify=/s/^.*$/set -b # notify/' \
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| 105 | -e '/^noglob=/s/^.*$/set -f # noglob/' \
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| 106 |
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| 107 |
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| 108 | # now some special csh variables converted to bash equivalents
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| 109 | echo
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| 110 | echo '# special csh variables converted to bash equivalents'
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| 111 | echo
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| 112 |
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| 113 | sed -e 's/'"$T"'/=/' < /tmp/cb$$.v |
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| 114 | grep "^cdpath=" |
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| 115 | sed 's/(//
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| 116 | s/ /:/g
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| 117 | s/)//
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| 118 | s/cdpath=/CDPATH=/'
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| 119 |
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| 120 |
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| 121 | sed -e 's/'"$T"'/=/' < /tmp/cb$$.v |
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| 122 | grep "^mail=" |
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| 123 | sed 's/(//
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| 124 | s/ /:/g
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| 125 | s/)//
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| 126 | s/mail=/MAILPATH=/' |
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| 127 | sed -e 's/MAILPATH=\([0-9][0-9][^:]*\)$/MAILCHECK=\1/' \
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| 128 | -e 's/MAILPATH=\([0-9][0-9][^:]*\):\(.*\)/MAILCHECK=\1 MAILPATH=\2/'
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| 129 |
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| 130 | exit 0
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