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##
## This file is part of shtool and 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 of the License, or (at your option) any later version.
##
## This file 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, or contact Ralf S. Engelschall <rse@engelschall.com>.
##
##
## COMMON UTILITY CODE
##
# commonly used ASCII values
ASC_TAB=" "
ASC_NL="
"
# determine name of tool
if [ ".$tool" != . ]; then
# used inside shtool script
toolcmd="$0 $tool"
toolcmdhelp="shtool $tool"
msgprefix="shtool:$tool"
else
# used as standalone script
toolcmd="$0"
toolcmdhelp="sh $0"
msgprefix="$str_tool"
fi
# parse argument specification string
eval `echo $arg_spec |\
sed -e 's/^\([0-9]*\)\([+=]\)/arg_NUMS=\1; arg_MODE=\2/'`
# parse option specification string
eval `echo h.$opt_spec |\
sed -e 's/\([a-zA-Z0-9]\)\([.:+]\)/opt_MODE_\1=\2;/g'`
# parse option alias string
eval `echo h:help,$opt_alias |\
sed -e 's/-/_/g' -e 's/\([a-zA-Z0-9]\):\([^,]*\),*/opt_ALIAS_\2=\1;/g'`
# interate over argument line
opt_PREV=''
while [ $# -gt 0 ]; do
# special option stops processing
if [ ".$1" = ".--" ]; then
shift
break
fi
# determine option and argument
opt_ARG_OK=no
if [ ".$opt_PREV" != . ]; then
# merge previous seen option with argument
opt_OPT="$opt_PREV"
opt_ARG="$1"
opt_ARG_OK=yes
opt_PREV=''
else
# split argument into option and argument
case "$1" in
--[a-zA-Z0-9]*=*)
eval `echo "x$1" |\
sed -e 's/^x--\([a-zA-Z0-9-]*\)=\(.*\)$/opt_OPT="\1";opt_ARG="\2"/'`
opt_STR=`echo $opt_OPT | sed -e 's/-/_/g'`
eval "opt_OPT=\${opt_ALIAS_${opt_STR}-${opt_OPT}}"
;;
--[a-zA-Z0-9]*)
opt_OPT=`echo "x$1" | cut -c4-`
opt_STR=`echo $opt_OPT | sed -e 's/-/_/g'`
eval "opt_OPT=\${opt_ALIAS_${opt_STR}-${opt_OPT}}"
opt_ARG=''
;;
-[a-zA-Z0-9]*)
eval `echo "x$1" |\
sed -e 's/^x-\([a-zA-Z0-9]\)/opt_OPT="\1";/' \
-e 's/";\(.*\)$/"; opt_ARG="\1"/'`
;;
-[a-zA-Z0-9])
opt_OPT=`echo "x$1" | cut -c3-`
opt_ARG=''
;;
*)
break
;;
esac
fi
# eat up option
shift
# determine whether option needs an argument
eval "opt_MODE=\$opt_MODE_${opt_OPT}"
if [ ".$opt_ARG" = . ] && [ ".$opt_ARG_OK" != .yes ]; then
if [ ".$opt_MODE" = ".:" ] || [ ".$opt_MODE" = ".+" ]; then
opt_PREV="$opt_OPT"
continue
fi
fi
# process option
case $opt_MODE in
'.' )
# boolean option
eval "opt_${opt_OPT}=yes"
;;
':' )
# option with argument (multiple occurances override)
eval "opt_${opt_OPT}=\"\$opt_ARG\""
;;
'+' )
# option with argument (multiple occurances append)
eval "opt_${opt_OPT}=\"\$opt_${opt_OPT}\${ASC_NL}\$opt_ARG\""
;;
* )
echo "$msgprefix:Error: unknown option: \`$opt_OPT'" 1>&2
echo "$msgprefix:Hint: run \`$toolcmdhelp -h' or \`man shtool' for details" 1>&2
exit 1
;;
esac
done
if [ ".$opt_PREV" != . ]; then
echo "$msgprefix:Error: missing argument to option \`$opt_PREV'" 1>&2
echo "$msgprefix:Hint: run \`$toolcmdhelp -h' or \`man shtool' for details" 1>&2
exit 1
fi
# process help option
if [ ".$opt_h" = .yes ]; then
echo "Usage: $toolcmdhelp $str_usage"
exit 0
fi
# complain about incorrect number of arguments
case $arg_MODE in
'=' )
if [ $# -ne $arg_NUMS ]; then
echo "$msgprefix:Error: invalid number of arguments (exactly $arg_NUMS expected)" 1>&2
echo "$msgprefix:Hint: run \`$toolcmd -h' or \`man shtool' for details" 1>&2
exit 1
fi
;;
'+' )
if [ $# -lt $arg_NUMS ]; then
echo "$msgprefix:Error: invalid number of arguments (at least $arg_NUMS expected)" 1>&2
echo "$msgprefix:Hint: run \`$toolcmd -h' or \`man shtool' for details" 1>&2
exit 1
fi
;;
esac
# establish a temporary file on request
if [ ".$gen_tmpfile" = .yes ]; then
# create (explicitly) secure temporary directory
if [ ".$TMPDIR" != . ]; then
tmpdir="$TMPDIR"
elif [ ".$TEMPDIR" != . ]; then
tmpdir="$TEMPDIR"
else
tmpdir="/tmp"
fi
tmpdir="$tmpdir/.shtool.$$"
( umask 077
rm -rf "$tmpdir" >/dev/null 2>&1 || true
mkdir "$tmpdir" >/dev/null 2>&1
if [ $? -ne 0 ]; then
echo "$msgprefix:Error: failed to create temporary directory \`$tmpdir'" 1>&2
exit 1
fi
)
# create (implicitly) secure temporary file
tmpfile="$tmpdir/shtool.tmp"
touch "$tmpfile"
fi
# utility function: map string to lower case
util_lower () {
echo "$1" | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'
}
# utility function: map string to upper case
util_upper () {
echo "$1" | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
}
# cleanup procedure
shtool_exit () {
rc="$1"
if [ ".$gen_tmpfile" = .yes ]; then
rm -rf "$tmpdir" >/dev/null 2>&1 || true
fi
exit $rc
}
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