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Subject: |
sort command in Redhat 5 does not work |
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Date: |
Thu, 7 Apr 2011 15:40:36 -0400 |
address@hidden root]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 3 (Taroon Update 5)
address@hidden root]# sort
address@hidden root]# set -o vi
address@hidden root]# grep prftp /etc/passwd | sort -n +2 -t':' | head -2
xmit:x:150:204::/prftp/forwarder:/bin/bash
anl:x:213:206:test user:/prftp/carriers/anl:/sbin/nologin
address@hidden root]# uname -a
Linux cnprodftp02 2.4.21-32.0.1.ELsmp #1 SMP Tue May 17 17:52:23 EDT 2005 i686 i686 i386 GNU/Linux
Sort does not work on REdhat-AS5 ; it used to work on Redhat AS-3
address@hidden mail]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.6 (Tikanga)
address@hidden mail]# grep prftp /etc/passwd | sort -n +2 -t':' | head -2
sort: open failed: +2: No such file or directory
address@hidden mail]#
address@hidden bin]# uname -a
Linux cnprodftp02 2.6.18-238.5.1.el5 #1 SMP Mon Feb 21 05:52:39 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
Thanks.
Jay Patel
Systems Administrator
INTTRA
+1 973.265.2263 Office
+1 973.641.0510 Mobile
+1 973.263.5969 Fax
www.inttra.com
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--- Begin Message ---
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Subject: |
Re: bug#8442: sort command in Redhat 5 does not work |
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Date: |
Thu, 07 Apr 2011 15:12:51 -0600 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.9 |
On 04/07/2011 01:40 PM, Jyotin Patel wrote:
>
> Sort does not work on REdhat-AS5 ; it used to work on Redhat AS-3
> address@hidden mail]# cat /etc/redhat-release
> Red Hat Enterprise Linux Server release 5.6 (Tikanga)
> address@hidden mail]# grep prftp /etc/passwd | sort -n +2 -t':' |
> head -2
> sort: open failed: +2: No such file or directory
Thanks for the report. However, this is not a bug in sort, but a
misunderstanding on your part about changes to sort syntax as POSIX has
evolved over the years. From the NEWS file:
A few usages still have behavior that depends on which POSIX standard is
being conformed to, and portable applications should beware these
problematic usages. These include:
Problematic Standard-conforming replacement, depending on
usage whether you prefer the behavior of:
POSIX 1003.2-1992 POSIX 1003.1-2001
sort +4 sort -k 5 sort ./+4
See also 'info coreutils standards' for information on how to set
_POSIX2_VERSION=199209 for the behavior you were expecting.
But in general, the old +2 syntax should be converted to the newer
POSIX-compliant -k3 (or even the safer -k3,3) instead. Newer coreutils
(the latest is 8.10) added a --debug option, to help in that:
$ echo hi | _POSIX2_VERSION=199209 sort -n +2 -t: --debug
sort: using `en_US.UTF-8' sorting rules
sort: obsolescent key `+2' used; consider `-k 3' instead
sort: key 1 is numeric and spans multiple fields
hi
^ no match for key
__
--
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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