Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Previously, the grep utility did not request processing of UTF-8 from the Perl-compatible regular expressions (PCRE) library if a UTF-8 locale was in effect. As a consequence, Unicode symbols were not correctly matched if a Perl regular expression (the "-P" option) was used with a UTF-8 locale. This update adds a request for UTF-8 processing to the PCRE library, and grep now correctly handles Unicode symbols in the described situation.
Description of problem:
Perl regular expression '\p{S}' should match any symbol, similarly
'\P{S}' should match any character which is not a symbol. This
works fine for basic ascii characters such as '$' but is broken
for unicode characters such as '€'.
# echo '€' | grep -P '\p{S}'
€
# echo '€' | grep -P '\P{S}'
€
# echo '$' | grep -P '\p{S}'
$
# echo '$' | grep -P '\P{S}'
Looks to be a grep bug as the same works fine in pcregrep:
# echo '€' | pcregrep -u '\p{S}'
€
# echo '€' | pcregrep -u '\P{S}'
Tested under cs_CZ.UTF-8 and en_US.UTF-8 locales.
Version-Release number of selected component (if applicable):
grep-2.6.3-2.el6.x86_64
Comment 1RHEL Program Management
2011-07-06 01:36:48 UTC
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
representative.
This is bug in grep. It does not request UTF-8 processing in pcre when running in UTF-8 locale.
Current behavior is identical to ASCII mode:
$ printf '/%s/\n%s\n' '\P{S}' '€' | ./pcretest
PCRE version 8.31 2012-07-06
re> data> 0: \xe2
data>
But it should run in UTF-8 mode:
$ printf '/%s/8\n%s\n' '\P{S}' '€' | ./pcretest
PCRE version 8.31 2012-07-06
re> data> No match
data>
The difference is the "/8" modifier. The PCRE API has PCRE_UTF8 option in pcre_compile(3) for that and grep should pass it to pcre_compile(3) when UTF-8 locale is in effect.
Comment 5RHEL Program Management
2012-09-07 05:11:32 UTC
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.
Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.
Comment 6Jaroslav Škarvada
2012-10-03 07:55:35 UTC
(In reply to comment #4)
Thanks.
> There seems to be already an upstream report with different fix
> <http://savannah.gnu.org/patch/?3934>.
>
Also linked to this BZ, waiting for upstream resolution.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2014-0622.html
Description of problem: Perl regular expression '\p{S}' should match any symbol, similarly '\P{S}' should match any character which is not a symbol. This works fine for basic ascii characters such as '$' but is broken for unicode characters such as '€'. # echo '€' | grep -P '\p{S}' € # echo '€' | grep -P '\P{S}' € # echo '$' | grep -P '\p{S}' $ # echo '$' | grep -P '\P{S}' Looks to be a grep bug as the same works fine in pcregrep: # echo '€' | pcregrep -u '\p{S}' € # echo '€' | pcregrep -u '\P{S}' Tested under cs_CZ.UTF-8 and en_US.UTF-8 locales. Version-Release number of selected component (if applicable): grep-2.6.3-2.el6.x86_64