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https://issues.apache.org/jira/browse/STDCXX-428?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Martin Sebor closed STDCXX-428.
-------------------------------
Resolution: Invalid
-------- Original Message --------
Subject: [Bug 241309] huge empty file created after an ungetwc() followed by
fwide()
Date: Fri, 25 May 2007 02:37:03 -0400
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Please do not reply directly to this email. All additional
comments should be made in the comments box of this bug report.
Summary: huge empty file created after an ungetwc() followed by fwide()
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=241309
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[EMAIL PROTECTED]
------- Additional Comments From [EMAIL PROTECTED] 2007-05-25 02:37 EST -------
This testcase violates ISO C99, 7.19.2(5):
"wide character input/output functions shall not be applied to a byte-oriented
stream."
puts is a byte output function, therefore the stream after puts is
byte-oriented.
ungetwc is wide input/output function and thus must not be used until you
reorient the stream.
> [Linux] huge empty file created after an ungetwc() followed by fwide()
> ----------------------------------------------------------------------
>
> Key: STDCXX-428
> URL: https://issues.apache.org/jira/browse/STDCXX-428
> Project: C++ Standard Library
> Issue Type: Bug
> Reporter: Martin Sebor
> Attachments: strace.out
>
>
> From https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=241309:
> -------- Original Message --------
> Subject: [Bug 241309] New: huge empty file created after an ungetwc()
> followed by fwide()
> Date: Thu, 24 May 2007 19:50:56 -0400
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Please do not reply directly to this email. All additional
> comments should be made in the comments box of this bug report.
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=241309
> Summary: huge empty file created after an ungetwc() followed by
> fwide()
> Product: Red Hat Enterprise Linux
> Version: 4.4
> Platform: All
> OS/Version: Linux
> Status: NEW
> Severity: medium
> Priority: medium
> Component: glibc
> AssignedTo: [EMAIL PROTECTED]
> ReportedBy: [EMAIL PROTECTED]
> QAContact: [EMAIL PROTECTED]
> We're seeing the following unusual behavior of the program below on Red Hat
> Advanced Server 4, Update 4:
> $ cat t.c && gcc t.c && rm -f foo.out && ./a.out > foo.out && ls -l foo.out &&
> du -k foo.out
> #include <stdio.h>
> #include <wchar.h>
> int main ()
> {
> puts ("");
> ungetwc ('A', stdout);
> fwide (stdout, 0);
> return 0;
> }
> -rw-r--r-- 1 sebor devel 182888783729 May 24 16:44 foo.out
> 16 foo.out
> The output of strace on the program is in the attached file.
> Here's info on libc:
> $ ldd a.out && /lib64/tls/libc.so.6
> libc.so.6 => /lib64/tls/libc.so.6 (0x000000381b500000)
> /lib64/ld-linux-x86-64.so.2 (0x000000381b100000)
> GNU C Library stable release version 2.3.4, by Roland McGrath et al.
> Copyright (C) 2005 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.
> There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
> PARTICULAR PURPOSE.
> Compiled by GNU CC version 3.4.6 20060404 (Red Hat 3.4.6-2).
> Compiled on a Linux 2.4.20 system on 2006-07-04.
> Available extensions:
> GNU libio by Per Bothner
> crypt add-on version 2.1 by Michael Glad and others
> Native POSIX Threads Library by Ulrich Drepper et al
> RT using linux kernel aio
> The C stubs add-on version 2.1.2.
> GNU Libidn by Simon Josefsson
> BIND-8.2.3-T5B
> NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
> Thread-local storage support included.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/libc/bugs.html>.
> ------- Additional Comments From [EMAIL PROTECTED] 2007-05-24 19:50 EST
> -------
> Created an attachment (id=155405)
> -->
> (https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=155405&action=view)
> Output of strace ./a.out >/dev/null 2>/dev/pts/1
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