On Sun, Jul 24, 2011 at 10:00:09PM +0800, lolilolicon wrote: > On Sun, Jul 24, 2011 at 9:09 PM, Connor Lane Smith <c...@lubutu.com> wrote: > > On 24 July 2011 06:34, Dave Reisner <d...@falconindy.com> wrote: > >> if [ "$path" -nt "$CACHE" ]; then > > > > 'test -nt' is non-portable. I think you've just discovered why we use > > the 'ls -dt' hack. > > > > I agree that dmenu_run isn't the nicest script in existence. But > > because of the tedious limitations of POSIX we don't have much choice. > > Sorry, but can you give an example where `test -nt' is not available? > Or can you point out what do you refer to to determine the portability > of a shell script?
I usually reference opengroup for POSIX util specs. I do love the wooledge wiki, though. http://pubs.opengroup.org/onlinepubs/000095399/utilities/test.html d > According to Greg's wiki [1], `test -nt' is not supported by dash, > although it works here with dash 0.5.6.1. Even if you must support the > older versions that does not know about `test -nt', you can use find: > > test `find "$path" -prune -newer "$CACHE"` > > as a drop-in replacement, which is better than `ls -dt' after all. > > [1] http://mywiki.wooledge.org/Bashism >
