1 files changed, 139 insertions, 0 deletions
diff --git a/examples/misc/cshtobash b/examples/misc/cshtobash
new file mode 100644
index 0000000..ce49bfc
--- /dev/null
+++ b/examples/misc/cshtobash
@@ -0,0 +1,139 @@
+#! /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 $TMPFILE1 $TMPFILEa $TMPFILEe $TMPFILEv $TMPFILEco $TMPFILEci' 0 1 2 3 6 15
+
+{ TMPFILE1=$(mktemp -t cb.1.XXXXXX) &&
+  TMPFILEa=$(mktemp -t cb.a.XXXXXX) &&
+  TMPFILEe=$(mktemp -t cb.e.XXXXXX) &&
+  TMPFILEv=$(mktemp -t cb.v.XXXXXX) &&
+  TMPFILEco=$(mktemp -t cshout.XXXXXX) &&
+  TMPFILEci=$(mktemp -t cshin.XXXXXX)
+} || exit 1
+
+
+T=$'\t'
+
+SOURCE="${1:+source $1}"
+
+cat << EOF >$TMPFILEci
+$SOURCE
+alias >! $TMPFILEa
+setenv >! $TMPFILEe
+set >! $TMPFILEv
+EOF
+
+# give csh a minimal environment, similar to what login would provide
+/usr/bin/env - USER=$USER HOME=$HOME PATH=/usr/bin:/bin:/usr/ucb:. TERM=$TERM SHELL=$SHELL /bin/csh -i < $TMPFILEci > $TMPFILEco 2>&1
+
+# First convert aliases
+
+cat << \EOF >$TMPFILE1
+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'/" < $TMPFILEa >>$TMPFILE1
+
+echo '# csh aliases'
+echo
+
+$BASH $TMPFILE1 | 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/$/'/" < $TMPFILEe
+
+# Finally, convert local variables
+echo
+echo '# csh variables'
+echo
+
+sed -e 's/'"$T"'/=/' \
+    -e "s/'/'"\\\\"''"/g \
+    -e '/^[A-Za-z0-9_]*=[^(]/{
+	s/=/='"'/"'
+	s/$/'"'/"'
+	}' < $TMPFILEv |
+sed -e '/^argv=/d' -e '/^cwd=/d' -e '/^filec=/d' -e '/^status=/d' \
+	 -e '/^verbose=/d' \
+	 -e '/^term=/d' \
+	 -e '/^home=/d' \
+	 -e '/^path=/d' \
+	 -e '/^user=/d' \
+	 -e '/^shell=/d' \
+	 -e '/^cdpath=/d' \
+	 -e '/^mail=/d' \
+	 -e '/^home=/s//HOME=/' \
+	 -e '/^prompt=/s//PS1=/' \
+	 -e '/^histfile=/s//HISTFILE=/' \
+	 -e '/^history=/s//HISTSIZE=/' \
+	 -e '/^savehist=$/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"'/=/' < $TMPFILEv |
+grep "^cdpath=" |
+sed 's/(//
+     s/ /:/g
+     s/)//
+     s/cdpath=/CDPATH=/'
+
+
+sed -e 's/'"$T"'/=/' < $TMPFILEv |
+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