Книга: UNIX — универсальная среда программирования

3.8.64 which1

3.8.64 which1
# which cmd: which cmd in PATH is executed, version 1
case $# in
0) echo 'Usage: which command' 1>&2; exit 2
esac
for i in `echo $PATH | sed 's/^:/.:/
                            s/::/:.:/g
                            s/:$/:./
                            s/:/ /g'`
do
 if test -f $i/$1 # use test -x if you can
 then
  echo $i/$1
  exit 0 # found it
 fi
done
exit 1 # not found


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