[2013-06-25 20:22] Jakob Kramer <[email protected]>
>
> I wrote a sponge program, but I am not fully convinced of it yet. What
> do you think?
I think you shouldn't rename(2). Renaming a file and replacing it's
contents are quite different things. Take for example:
$ mkdir a
$ chmod 600 a/b
$ touch a/b
$ chmod 100 a
$ echo foo >a/b # this goes well
$ echo bar >c
$ mv c a/b # this not
mv: cannot move `c' to `a/b': Permission denied
Special permissions and owner/group-ships are lost as well.
Either keep the contents in memory or read-write the contents
back.
Or better use what's already available: sort(1).
#!/bin/sh
if $# -ne 1 ; then
echo "Usage: ${0##*/} outfile" >&2
exit 1
fi
sort -m -o "$1"
;-)
meillo
