| # |
| # 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 |
| } |