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Re: ls -l|head seems to look at all files in directory
From: |
Jim Meyering |
Subject: |
Re: ls -l|head seems to look at all files in directory |
Date: |
Mon, 25 May 2009 21:46:01 +0200 |
Bob Proulx wrote:
> Jim Meyering wrote:
>> Right. The change that made ls -1U more efficient was after 6.12
>> [v6.12-113-g8d974b0]:
>>
>> commit 8d974b00fbbc2025de63e1e6d54827648fefa1c4
>> Author: Kamil Dudka <address@hidden>
>> Date: Wed Jul 30 14:31:50 2008 +0200
>>
>> ls -U1 now uses constant memory
>>
>> When printing one name per line and not sorting, ls now uses
>> constant memory per directory, no matter how many files are in
>> the directory.
>> * ls.c (print_dir): Print each file name immediately, when possible.
>> * NEWS: Mention the improvement.
>
> Hmm... Traditionally hasn't output to a pipe been the same as -1? So
> it seems to me that 'ls -U | cat' should be the same as 'ls -1U | cat',
> shouldn't it? This makes me wonder why the -1 is needed for this
> behavior. It would seem that output to a pipe should be enough.
Hi Bob,
Good point. The -1 is not needed when ls' stdout is a pipe.
Thanks.
- Re: ls -l|head seems to look at all files in directory, (continued)
- Re: ls -l|head seems to look at all files in directory, Pádraig Brady, 2009/05/25
- Re: ls -l|head seems to look at all files in directory, Jim Meyering, 2009/05/25
- Re: ls -l|head seems to look at all files in directory, Reuben Thomas, 2009/05/25
- Re: ls -l|head seems to look at all files in directory, Jim Meyering, 2009/05/25
- Re: ls -l|head seems to look at all files in directory, Reuben Thomas, 2009/05/25
- Re: ls -l|head seems to look at all files in directory, Bob Proulx, 2009/05/25
- Re: ls -l|head seems to look at all files in directory,
Jim Meyering <=
- Re: ls -l|head seems to look at all files in directory, Bob Proulx, 2009/05/25
Re: ls -l|head seems to look at all files in directory, Pádraig Brady, 2009/05/25
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