csh shell脚本疑难解答

Question

i have the following csh shell script thats giving me errors and I'm not quite sure why. it essentially says that ls and cp commands are not found

#!/bin/csh
clear

set path="~/SCRAT_SIMs/V6.0/bin/linux/"
echo "Pushing files to: $path" 

ls packages/

cp -r packages/acte_asym     $path 
cp -r packages/acte_hq/      $path   

when i get rid of the set path then it seems to work. any ideas?

Answer 1

In csh and tcsh, the $path shell variable and the $PATH environment variable are tied together. $PATH (which applies to everything, not just the shell) is a list of directory names separated by : characters. $path is a csh array variable that mirrors the contents of $PATH .

In your case, you just need to pick a different variable name.

If you actually want to manipulate your execution path, you should usually keep the existing contents of $path and add new directories to the beginning or to the end. For example:

set path = ( ~/bin $path:q )

The :q suffix avoids problems if some directory in $PATH has funny characters like spaces. Note: Don't use double quotes here:

set path = ( ~/bin "$path" )

That will expand the entire contents of your $path to a single string with embedded spaces; $path:q keeps it as an array.

Obligatory link . (I used to write csh scripts myself, but I've found that sh and bash are much better for programming, though tcsh still has a few advantages for interactive use.)