Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1 | # |
| 2 | # An almost-ksh compatible `whence' command. This is as hairy as it is |
| 3 | # because of the desire to exactly mimic ksh. |
| 4 | # |
| 5 | # This depends somewhat on knowing the format of the output of the bash |
| 6 | # `builtin type' command. |
| 7 | # |
| 8 | # Chet Ramey |
| 9 | # chet@ins.CWRU.Edu |
| 10 | # |
| 11 | whence() |
| 12 | { |
| 13 | local vflag= path= |
| 14 | |
| 15 | if [ "$#" = "0" ] ; then |
| 16 | echo "whence: argument expected" |
| 17 | return 1 |
| 18 | fi |
| 19 | case "$1" in |
| 20 | -v) vflag=1 |
| 21 | shift 1 |
| 22 | ;; |
| 23 | -*) echo "whence: bad option: $1" |
| 24 | return 1 |
| 25 | ;; |
| 26 | *) ;; |
| 27 | esac |
| 28 | |
| 29 | if [ "$#" = "0" ] ; then |
| 30 | echo "whence: bad argument count" |
| 31 | return 1 |
| 32 | fi |
| 33 | |
| 34 | for cmd |
| 35 | do |
| 36 | if [ "$vflag" ] ; then |
| 37 | echo $(builtin type $cmd | sed 1q) |
| 38 | else |
| 39 | path=$(builtin type -path $cmd) |
| 40 | if [ "$path" ] ; then |
| 41 | echo $path |
| 42 | else |
| 43 | case "$cmd" in |
| 44 | /*) if [ -x "$cmd" ]; then |
| 45 | echo "$cmd" |
| 46 | fi |
| 47 | ;; |
| 48 | *) case "$(builtin type -type $cmd)" in |
| 49 | "") ;; |
| 50 | *) echo "$cmd" |
| 51 | ;; |
| 52 | esac |
| 53 | ;; |
| 54 | esac |
| 55 | fi |
| 56 | fi |
| 57 | done |
| 58 | return 0 |
| 59 | } |