Bug 1170187

Summary:	Problems when using ftruncate on files opened in append mode
Product:	Red Hat Enterprise Linux 7	Reporter:	Jan Kurik <jkurik>
Component:	glibc	Assignee:	Carlos O'Donell <codonell>
Status:	CLOSED ERRATA	QA Contact:	Arjun Shankar <ashankar>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	7.0	CC:	amascari, ashankar, bgollahe, codonell, djdumas, fche, fdanapfe, fweimer, helge.deller, law, linux, lmiccini, mcermak, michael.trapp, michele, mnewsome, pfrankli, pm-eus, spoyarek, vanhoof
Target Milestone:	rc	Keywords:	Regression, ZStream
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc-2.17-55.el7_0.2	Doc Type:	Bug Fix
Doc Text:	If a file stream open in append mode and its underlying file descriptor are used in tandem and the file is truncated using the ftruncate function on the file descriptor, a subsequent ftell call on the stream incorrectly modifies the file offset by seeking to the new end of the file. This fix now ensures that ftell modifies the stream state only when it is in append mode and the buffer for the stream is not empty.	Story Points:	---
Clone Of:	1156331	Environment:
Last Closed:	2014-12-18 20:31:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1156331
Bug Blocks:

Description Jan Kurik 2014-12-03 13:26:22 UTC

This bug has been copied from bug #1156331 and has been proposed
to be backported to 7.0 z-stream (EUS).

Comment 9 errata-xmlrpc 2014-12-18 20:31:45 UTC

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.

https://rhn.redhat.com/errata/RHSA-2014-2023.html