Reuben Thomas wrote: > On Mon, 25 May 2009, Jim Meyering wrote: > >> Pádraig Brady wrote: >> >>> Reuben Thomas wrote: >>>> On Mon, 25 May 2009, Jim Meyering wrote: >>>> >>>>> To do what he wants you have to know that ls -1U is the only >>>>> way to get one output entry per readdir call. >>>>> >>>>> Reuben, you want to do it like this: >>>>> >>>>> ls -1U|head|xargs ls -l >>>> >>>> Thanks for the hint about -1, but this doesn't seem to make any >>>> difference: I run "ls -1U|head" in a directory with lots of files (about >>>> 10,000) and it pauses for a minute or so before giving me my ten lines >>>> of output. >>>> >>>> If I run the command again, then of course it runs almost instantly, so >>>> I'm not sure what use the loops are in the tests you give. >>> >>> With the ls on fedora 8 (coreutils 6.9) I see all the >>> redundant getdents64() calls when using strace on Jim's command above. >>> With the latest coreutils I do not. >> >> Right. The change that made ls -1U more efficient was after 6.12 >> [v6.12-113-g8d974b0]: > > Ah, I'm using 6.10. Thanks for the clarification.
Argh. I'll try to ask for the version number next time if you try to reproduce with latest tools and/or report the version number ;-) _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
