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author | cvpcs <root@cvpcs.org> | 2010-06-02 11:02:31 -0500 |
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committer | cvpcs <root@cvpcs.org> | 2010-06-02 11:02:31 -0500 |
commit | 772f20abb0a3a0979c440114bf3a1cff5b3cef03 (patch) | |
tree | 3384b9291d73a12542c526a8557218c7435491b0 /examples/functions/whence | |
download | external_bash-772f20abb0a3a0979c440114bf3a1cff5b3cef03.zip external_bash-772f20abb0a3a0979c440114bf3a1cff5b3cef03.tar.gz external_bash-772f20abb0a3a0979c440114bf3a1cff5b3cef03.tar.bz2 |
initial import of bash 4.1
Diffstat (limited to 'examples/functions/whence')
-rw-r--r-- | examples/functions/whence | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/examples/functions/whence b/examples/functions/whence new file mode 100644 index 0000000..70b2322 --- /dev/null +++ b/examples/functions/whence @@ -0,0 +1,59 @@ +# +# An almost-ksh compatible `whence' command. This is as hairy as it is +# because of the desire to exactly mimic ksh. +# +# This depends somewhat on knowing the format of the output of the bash +# `builtin type' command. +# +# Chet Ramey +# chet@ins.CWRU.Edu +# +whence() +{ + local vflag= path= + + if [ "$#" = "0" ] ; then + echo "whence: argument expected" + return 1 + fi + case "$1" in + -v) vflag=1 + shift 1 + ;; + -*) echo "whence: bad option: $1" + return 1 + ;; + *) ;; + esac + + if [ "$#" = "0" ] ; then + echo "whence: bad argument count" + return 1 + fi + + for cmd + do + if [ "$vflag" ] ; then + echo $(builtin type $cmd | sed 1q) + else + path=$(builtin type -path $cmd) + if [ "$path" ] ; then + echo $path + else + case "$cmd" in + /*) if [ -x "$cmd" ]; then + echo "$cmd" + fi + ;; + *) case "$(builtin type -type $cmd)" in + "") ;; + *) echo "$cmd" + ;; + esac + ;; + esac + fi + fi + done + return 0 +} |