This Bash script generates other Bash scripts. It takes a command name as input and creates a script file for that command in the /usr/local/bin/scripts directory. It adds standard header information and functions for usage, version, and error handling. The generated script is given execute permissions and a symbolic link is created to the script from /usr/local/bin using the input command name.

1. #!/bin/bash
# /usr/local/bin/mkscript
# Copyright 2000, Chris F.A. Johnson
# Released under the terms of the GNU General Public License
# USAGE: mkscript command
# fix permissions for script "command"-sh in /usr/local/bin/scripts
# create it if it doesn't exist
# link it to "command" in /usr/local/bin
die()
{
exitcode=$1
shift
if [ "$*" ]
then
echo "$*"
fi
exit ${exitcode:-1}
}
version() {
echo $version
}
usage()
{
echo "
$progname -
USAGE: $progname [OPTIONS]
OPTIONS:
-d DESC - description
-f - force=1 ;; # replace file if it exists
-r - remove=1 ;; # remove script if is exists
-R - remove=2 ;; # not used
-a OPTS - options that take arguments
-o OPTS - options that do not take arguments
-u - user=$OPTARG ;;
-a OPTS - argopts=$OPTARG ;;
-h - help: print this message
-H - help: print more detailed message
-v - verbose:
-V - print version information
Copyright 2001, Chris F.A. Johnson
"
}
put_header()
{
echo "#!/bin/bash
# `date`
# NAME: $command
# Copyright `date +%Y`, $author
# Released under the terms of the GNU General Public License
"
}
func_die()

2. {
echo 'die() {
exitcode=$1
shift
if [ "$*" ]
then
echo "$*"
fi
exit ${exitcode:-1}
}
'
}
func_version()
{
echo 'version()
{
echo " $progname, version $version
Copyright $copyright, $author $email
This is free software, released under the terms of the GNU General
Public License. There is NO warranty; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
"
}
'
}
func_usage()
{
echo "usage()
{
echo " $progname - $description
USAGE: $progname [OPTIONS]
OPTIONS:
""
{
n=0
while [ $n -lt ${#argopts} ]
do
l=${argopts:$n:1}
echo " -$l arg - "
n=$(( $n + 1 ))
done
n=0
while [ $n -lt ${#opts} ]
do
l=${opts:$n:1}
echo " -$l - "
n=$(( $n + 1 ))
done
} | sort
echo "
[ $longusage -eq 1 ] &&
echo "
-h - help: print shorter help message
-H - help: print this message" ||
echo "
-h - help: print this message

3. -H - help: print more detailed message"
echo " -v - verbose:
-V - print version information
"
[ $longusage -eq 1 ] &&
version ||
echo "
Copyright $copyright, $author
"
}
"
}
put_vars()
{
echo "
description="$description"
verbose=0
longusage=0
version="1.0"
copyright=$copyright
author="$author""
echo 'progname=${0##*/}'
}
put_getopts()
{
[ -n "$argopts" ] && {
o=0
while [ $o -lt ${#argopts} ]
do
l=${argopts:$o:1}
[ "$l" ] && getopts="$getopts${NL} $l) ${l}_arg=$OPTARG ;;"
optstr=${optstr}${l}:
o=$(( $o + 1 ))
done
}
[ -n "$opts" ] && {
o=0
while [ $o -lt ${#opts} ]
do
l=${opts:$o:1}
[ "$l" ] && getopts="$getopts${NL} $l) ${l}_opt=1 ;;"
optstr=${optstr}${l}
o=$(( $o + 1 ))
done
}
echo "
while getopts vVhH-:$optstr var
do
case $var in"
echo "$getopts" | sort
echo '
-) case $OPTARG in

4. help) usage; exit ;;
help_long) longusage=1; usage; exit ;;
version) version; exit ;;
esac
;;
h) usage; exit ;;
H) longusage=1; usage; exit ;;
v) verbose=$(( $verbose + 1 )) ;;
V) version; exit ;;
*);;
esac
done
shift $(( $OPTIND - 1 ))
'
}
bindir="/usr/local/bin"
shdir="${bindir}/scripts"
version="1.1"
verbose=0
force=0
remove=0
longusage=0
progname=${0##*/}
NL=$'n'
while getopts vVhHfro:a:d:u: var
do
case "$var" in
d) description=$OPTARG ;;
f) force=1 ;; # replace file if it exists
r) remove=1 ;;
R) remove=2 ;;
a) argopts=$OPTARG ;;
o) opts=$OPTARG ;;
u) user=$OPTARG ;;
a) argopts=$OPTARG ;;
v) verbose=$(( $verbose + 1 )) ;;
V) version; exit ;;
h) usage; exit ;;
H) longusage=1; usage; exit ;;
*);;
esac
done
shift $(( $OPTIND - 1 ))
echo *=$*
echo opts=$opts
echo argopts=$argopts
if [ ! "$1" ]
then
die 1 "${progname}: command name required"
fi
cd ${shdir}
command=${1}
shcommand=${command}-sh
author="`grep -w ^$USER /etc/passwd | cut -d: -f5 | cut -d "," -f1`"
copyright=`date +%Y`

5. if [ $remove -ge 1 ]
then
if [ -f "$shcommand" -a $remove -eq 2 ]
then
rm -f $shcommand
fi
if [ -f $bindir/$command ]
then
rm -f $bindir/$command
fi
## add code to remove any other aliases in /usr/local/bin
exit
fi
if [ ! -f $bindir/$command ]
then
touch $shdir/$shcommand
cd $bindir
ln -s $shdir/$shcommand $command
fi
if [ -f "$shcommand" -a $force = 0 ];then
echo " $shcommand already exists
Use -f to replace it"
exit
fi
(
put_header
func_version
func_usage
put_vars
{
[ -n "$argopts" ] && {
echo $argopts | while read -n1 l
do
[ "$l" ] && echo "${l}_arg="
done
}
[ -n "$opts" ] && {
echo $opts | while read -n1 l
do
[ "$l" ] && echo "${l}_opt=0"
done
}
} | sort
put_getopts
) > ${shdir}/$shcommand
chown ${user:-$USER} ${shdir}/$shcommand
chmod a+x ${shdir}/${shcommand}
cd $bindir
pwd
ln -fs scripts/$shcommand $command
ls -l ${shdir}/$shcommand

6. if [ $remove -ge 1 ]
then
if [ -f "$shcommand" -a $remove -eq 2 ]
then
rm -f $shcommand
fi
if [ -f $bindir/$command ]
then
rm -f $bindir/$command
fi
## add code to remove any other aliases in /usr/local/bin
exit
fi
if [ ! -f $bindir/$command ]
then
touch $shdir/$shcommand
cd $bindir
ln -s $shdir/$shcommand $command
fi
if [ -f "$shcommand" -a $force = 0 ];then
echo " $shcommand already exists
Use -f to replace it"
exit
fi
(
put_header
func_version
func_usage
put_vars
{
[ -n "$argopts" ] && {
echo $argopts | while read -n1 l
do
[ "$l" ] && echo "${l}_arg="
done
}
[ -n "$opts" ] && {
echo $opts | while read -n1 l
do
[ "$l" ] && echo "${l}_opt=0"
done
}
} | sort
put_getopts
) > ${shdir}/$shcommand
chown ${user:-$USER} ${shdir}/$shcommand
chmod a+x ${shdir}/${shcommand}
cd $bindir
pwd
ln -fs scripts/$shcommand $command
ls -l ${shdir}/$shcommand