On 02-06-05 15:43:45 CEST, Rich Salz wrote:
> Richard Levitte via RT wrote:
> >Can I assume that sed exists and works properly? dirname can be
> >coded like this:
>
> > echo $$i | sed -e 's|[^/]*$||' -e 's|/$||'
>
> "dirname foo" returns "." which the above doesn't catch.
> I can only think of the following short shell script
> #! /bin/sh
> for I
> do
> case "$I" in
> */* ) echo "$I" | sed -e 's@\(.*\)/.*@\1@' ;;
> *) echo "."
> esac
> done
i remember on my SVR3 machine dirname(1) was a shell script:
-r-xr-xr-x 1 sys bin 93 Oct 11 1985 /bin/dirname*
expr \
${1-.}'/' : '\(/\)[^/]*/$' \
\| ${1-.}'/' : '\(.*[^/]\)//*[^/][^/]*//*$' \
\| .
the solaris 1 dirname is:
#! /bin/sh
#
# @(#)dirname.sh 1.5 89/03/22 SMI; from S5R2 1.2
#
PATH=/bin:/usr/bin
expr \
${1-.}'/' : '\(/\)[^/]*//*$' \
\| ${1-.}'/' : '\(.*[^/]\)//*[^/][^/]*//*$' \
\| .
i.e. the same with attribution.
unlike sed expr usually is a sh built-in.
rj
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