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+#
+# .kshenv -- functions and aliases to provide the beginnings of a ksh
+# environment for bash.
+#
+# Chet Ramey
+# chet@ins.CWRU.Edu
+#
+
+#
+# Copyright 2002 Chester Ramey
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# TThis program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#
+# These are definitions for the ksh compiled-in `exported aliases'. There
+# are others, but we already have substitutes for them: "history", "type",
+# and "hash".
+#
+alias r="fc -s"
+alias functions="typeset -f"
+alias integer="typeset -i"
+alias nohup="nohup "
+alias command="command "
+alias stop="kill -s STOP"
+alias redirect="command exec"
+alias hist="fc"
+
+#
+# An almost-ksh compatible `whence' command. This is as hairy as it is
+# because of the desire to exactly mimic ksh (whose behavior was determined
+# empirically).
+#
+# This depends somewhat on knowing the format of the output of the bash
+# `builtin type' command.
+#
+
+whence()
+{
+ local vflag pflag fflag defarg c
+ local path
+
+ vflag= aflag= pflag= fflag=
+ path=
+ if [ "$#" = "0" ] ; then
+ echo "whence: usage: whence [-afpv] name..." >&2
+ return 2
+ fi
+
+ OPTIND=1
+ while getopts "avfp" c
+ do
+ case "$c" in
+ a) defarg=-a ;;
+ f) fflag=1 ;; # no-op
+ p) pflag=1 ;;
+ v) vflag=1 ;;
+ ?) echo "whence: $1: unknown option" >&2
+ echo "whence: usage: whence [-afpv] name..." >&2
+ return 2 ;;
+ esac
+ done
+
+ shift $(( $OPTIND - 1 ))
+
+ if [ "$#" = "0" ] ; then
+ echo "whence: usage: whence [-afpv] name..." >&2
+ return 2
+ fi
+
+ for cmd
+ do
+ if [ "$vflag" ] ; then
+ if [ -z "$defarg" ]; then
+ builtin type $cmd | sed 1q
+ else
+ if builtin type $defarg -t $cmd | grep 'function$' >/dev/null 2>&1; then
+ # HAIRY awk script to suppress
+ # printing of function body -- could
+ # do it with sed, but I don't have
+ # that kind of time
+ builtin type $defarg $cmd | awk '
+BEGIN {printit = 1;}
+$1 == "'$cmd'" && $2 == "()" {printit=0; next; }
+/^}$/ { if (printit == 0) printit=1 ; else print $0; next ; }
+/.*/ { if (printit) print $0; }'
+ else
+ builtin type $defarg $cmd
+ fi
+ fi
+ else
+ path=$(builtin type $defarg -p $cmd)
+ if [ "$path" ] ; then
+ echo $path
+ else
+ case "$cmd" in
+ /*) echo "" ;;
+ *) case "$(builtin type -t $cmd)" in
+ "") echo "" ;;
+ *) echo "$cmd" ;;
+ esac
+ ;;
+ esac
+ fi
+ fi
+ done
+ return 0
+}
+
+#
+# For real ksh homeboy fanatics, redefine the `type' builtin with a ksh
+# version.
+#
+#type()
+#{
+# whence -v "$*"
+#}
+
+#
+# ksh-like `cd': cd [-LP] [dir [change]]
+#
+cd()
+{
+ OPTIND=1
+ while getopts "LP" opt
+ do
+ case $opt in
+ L|P) CDOPTS="$CDOPTS -$opt" ;;
+ *) echo "$FUNCNAME: usage: $FUNCNAME [-LP] [dir] [change]" >&2
+ return 2;;
+ esac
+ done
+
+ shift $(( $OPTIND - 1 ))
+
+ case $# in
+ 0) builtin cd $CDOPTS "$HOME" ;;
+ 1) builtin cd $CDOPTS "$@" ;;
+ 2) old="$1" new="$2"
+ case "$PWD" in
+ *$old*) ;;
+ *) echo "${0##*/}: $FUNCNAME: bad substitution" >&2 ; return 1 ;;
+ esac
+
+ dir=${PWD//$old/$new}
+
+ builtin cd $CDOPTS "$dir" && echo "$PWD"
+
+ ;;
+ *) echo "${0##*/}: $FUNCNAME: usage: $FUNCNAME [-LP] [dir] [change]" >&2
+ return 2 ;;
+ esac
+}
+
+#
+# ksh print emulation
+#
+# print [-Rnprsu[n]] [-f format] [arg ...]
+#
+# - end of options
+# -R BSD-style -- only accept -n, no escapes
+# -n do not add trailing newline
+# -p no-op (no coprocesses)
+# -r no escapes
+# -s print to the history file
+# -u n redirect output to fd n
+# -f format printf "$format" "$@"
+#
+
+print()
+{
+ local eflag=-e
+ local nflag= fflag= c
+ local fd=1
+
+ OPTIND=1
+ while getopts "fRnprsu:" c
+ do
+ case $c in
+ R) eflag= ;;
+ r) eflag= ;;
+ n) nflag=-n ;;
+ s) sflag=y ;;
+ f) fflag=y ;;
+ u) fd=$OPTARG ;;
+ p) ;;
+ esac
+ done
+ shift $(( $OPTIND - 1 ))
+
+ if [ -n "$fflag" ]; then
+ builtin printf "$@" >&$fd
+ return
+ fi
+
+ case "$sflag" in
+ y) builtin history -s "$*" ;;
+ *) builtin echo $eflag $nflag "$@" >&$fd
+ esac
+}
+
+# substring function
+# this function should be equivalent to the substring built-in which was
+# eliminated after the 06/29/84 version
+substring ()
+{
+ local lpat flag str #local variables
+ set -f
+ case $1 in
+ -l|-L)
+ flag=$1
+ lpat=$2
+ shift 2
+ ;;
+ esac
+ # test for too few or too many arguments
+ if [ x"$1" = x ] || [ $# -gt 2 ]; then
+ print -u2 'substring: bad argument count'
+ return 1
+ fi
+ str=$1
+ if [ x"$flag" = x-l ]; then #substring -l lpat
+ str=${str#$lpat}
+ elif [ x"$flag" = x-L ]; then
+ str=${str##$lpat} #substring -L lpat
+ fi
+
+ if [ x"$2" != x ]; then
+ echo ${str%$2}
+ else
+ echo $str
+ fi
+
+ return 0
+}