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Re: bootstrap symlink dependencies
From: |
Paul Eggert |
Subject: |
Re: bootstrap symlink dependencies |
Date: |
Mon, 16 May 2011 12:40:50 -0700 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc14 Thunderbird/3.1.10 |
On 05/16/11 12:12, Eric Blake wrote:
> On the other hand, it only works with POSIX
> shells (Solaris /bin/sh doesn't understand the XSI notion of %% and ##).
>
Another option might be something like this (untested)
lswords=`ls -1diL "$src" "$dst" 2>/dev/null` &&
inum= && \
for lsword in $lswords; do
case $lsword in
*[!0-9]*) ;;
*) if test -z "$inum"; then
inum=$lsword
elif test $inum -ne $lsword; then
inum=
break
fi ;;
esac
done &&
test -n "$inum"
This uses just one fork+exec too, but it doesn't use the
XSI notion of %% and ##. It can be fooled if "$src"
or "$dst" contains an integer surrounded by spaces, but
any such errors cause it to fail in a conservative way
(by doing needless remakes), and these errors should be
rare so that's not so bad.
It assumes [!0-9] works, though;
is that a safe assumption these days?
- bootstrap symlink dependencies, Pádraig Brady, 2011/05/09
- Re: bootstrap symlink dependencies, Jim Meyering, 2011/05/13
- Re: bootstrap symlink dependencies, Paul Eggert, 2011/05/14
- Re: bootstrap symlink dependencies, Pádraig Brady, 2011/05/16
- Re: bootstrap symlink dependencies, Paul Eggert, 2011/05/16
- Re: bootstrap symlink dependencies, Jim Meyering, 2011/05/16
- Re: bootstrap symlink dependencies, Eric Blake, 2011/05/16
- Re: bootstrap symlink dependencies,
Paul Eggert <=
- Re: bootstrap symlink dependencies, Eric Blake, 2011/05/16
- Re: bootstrap symlink dependencies, Ralf Wildenhues, 2011/05/16
- Re: bootstrap symlink dependencies, Paul Eggert, 2011/05/16
- Re: bootstrap symlink dependencies, Pádraig Brady, 2011/05/16