53 lines
1 KiB
Text
53 lines
1 KiB
Text
|
#
|
||
|
|
# whatis -- and implementation of the 10th Edition Unix sh builtin `whatis'
|
||
|
|
# command.
|
||
|
|
#
|
||
|
|
# usage: whatis arg [...]
|
||
|
|
#
|
||
|
|
# For each argument, whatis prints the associated value as a parameter,
|
||
|
|
# builtin, function, alias, or executable file as appropriate. In each
|
||
|
|
# case, the value is printed in a form which would yield the same value
|
||
|
|
# if typed as input to the shell itself.
|
||
|
|
#
|
||
|
|
|
||
|
|
whatis()
|
||
|
|
{
|
||
|
|
local wusage='usage: whatis arg [arg...]'
|
||
|
|
local fail=0
|
||
|
|
|
||
|
|
if [ $# -eq 0 ] ; then
|
||
|
|
echo "$wusage"
|
||
|
|
return 1
|
||
|
|
fi
|
||
|
|
|
||
|
|
for arg
|
||
|
|
do
|
||
|
|
case $(builtin type -type $arg 2>/dev/null) in
|
||
|
|
"alias")
|
||
|
|
builtin alias "$arg"
|
||
|
|
;;
|
||
|
|
"function")
|
||
|
|
builtin type "$arg" | sed 1d
|
||
|
|
;;
|
||
|
|
"builtin")
|
||
|
|
echo builtin "$arg"
|
||
|
|
;;
|
||
|
|
"file")
|
||
|
|
builtin type -path "$arg"
|
||
|
|
;;
|
||
|
|
*)
|
||
|
|
# OK, we could have a variable, or we could have nada
|
||
|
|
if [ "$(eval echo \${$arg+set})" = "set" ] ; then
|
||
|
|
# It is a variable, and it is set
|
||
|
|
echo -n "$arg="
|
||
|
|
eval echo '\"'\$$arg'\"'
|
||
|
|
else
|
||
|
|
echo whatis: $arg: not found
|
||
|
|
fail=1
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
done
|
||
|
|
return $fail
|
||
|
|
}
|