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[Bug libc/11595] New: sprintf %% format error resulting in output corruption
- From: "michael dot yacc at blueyonder dot co dot uk" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 13 May 2010 11:40:43 -0000
- Subject: [Bug libc/11595] New: sprintf %% format error resulting in output corruption
- Reply-to: sourceware-bugzilla at sourceware dot org
The following program produces different output for printf and sprintf. It
appears the sprintf is being corrupted by the %% in the format string
#include <cstdio>
int main(int ac, char **av)
{
char buf[1024];
printf("%8.4f%% AAAA\n", 98.3450);
sprintf(buf, "%8.4f%% AAAA\n", 98.3450);
printf(buf);
return (0);
}
The output on my server (Linux analysis-043 2.6.18-92.el5 #1 SMP Tue Jun 10
18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux) is
98.3450% AAAA
98.3450 0X1.896147AE147AEP+6AAA
I think the output should be identical. When %% is present in the sprintf
format string the output is being corrupted.
--
Summary: sprintf %% format error resulting in output corruption
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: michael dot yacc at blueyonder dot co dot uk
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11595
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