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* [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode
@ 2012-09-04 15:52 siddhesh at redhat dot com
2012-09-04 15:54 ` [Bug stdio/14543] " siddhesh at redhat dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: siddhesh at redhat dot com @ 2012-09-04 15:52 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14543
Bug #: 14543
Summary: fseek sets invalid status in the internal buffer in
wide mode
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: stdio
AssignedTo: unassigned@sourceware.org
ReportedBy: siddhesh@redhat.com
Classification: Unclassified
fseek sets the pointers in the external buffer correctly, but initializes the
internal buffer as if there's nothing in it. As a result, the position computed
in a subsequent ftell is incorrect.
How Reproducible:
Always
Reproducer program:
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
int main(int argc, char** argv)
{
FILE *fp;
setlocale(LC_ALL, "en_US.utf8");
fp = fopen("output.txt", "w+");
if (fp == NULL) {
perror("fopen");
exit(1);
}
if (fputws(L"abc\n", fp) == -1) {
perror("fputws");
exit(1);
}
printf("before=%d\n", ftell(fp));
rewind (fp);
if (fseek(fp, 0L, SEEK_END) == -1) {
perror("fseek");
exit(1);
}
printf("fseek=%d\n", ftell(fp));
if (fputws(L"xyz\n", fp) == -1) {
perror("fputws");
exit(1);
}
printf("after=%d\n", ftell(fp));
fclose(fp);
}
Actual result:
before=4
fseek=0
after=4
Expected Result:
before=4
fseek=4
after=8
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* [Bug stdio/14543] fseek sets invalid status in the internal buffer in wide mode
2012-09-04 15:52 [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode siddhesh at redhat dot com
@ 2012-09-04 15:54 ` siddhesh at redhat dot com
2012-09-13 14:16 ` siddhesh at redhat dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: siddhesh at redhat dot com @ 2012-09-04 15:54 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14543
Siddhesh Poyarekar <siddhesh at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at sourceware |siddhesh at redhat dot com
|dot org |
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug stdio/14543] fseek sets invalid status in the internal buffer in wide mode
2012-09-04 15:52 [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode siddhesh at redhat dot com
2012-09-04 15:54 ` [Bug stdio/14543] " siddhesh at redhat dot com
@ 2012-09-13 14:16 ` siddhesh at redhat dot com
2012-09-28 13:31 ` siddhesh at redhat dot com
2014-06-17 4:46 ` fweimer at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: siddhesh at redhat dot com @ 2012-09-13 14:16 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14543
Siddhesh Poyarekar <siddhesh at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug stdio/14543] fseek sets invalid status in the internal buffer in wide mode
2012-09-04 15:52 [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode siddhesh at redhat dot com
2012-09-04 15:54 ` [Bug stdio/14543] " siddhesh at redhat dot com
2012-09-13 14:16 ` siddhesh at redhat dot com
@ 2012-09-28 13:31 ` siddhesh at redhat dot com
2014-06-17 4:46 ` fweimer at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: siddhesh at redhat dot com @ 2012-09-28 13:31 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=14543
Siddhesh Poyarekar <siddhesh at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #1 from Siddhesh Poyarekar <siddhesh at redhat dot com> 2012-09-28 13:30:55 UTC ---
Fixed:
http://sourceware.org/git/?p=glibc.git;a=commit;h=4573c6b09884a93fffa3a754678ef881cadebfb3
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug stdio/14543] fseek sets invalid status in the internal buffer in wide mode
2012-09-04 15:52 [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode siddhesh at redhat dot com
` (2 preceding siblings ...)
2012-09-28 13:31 ` siddhesh at redhat dot com
@ 2014-06-17 4:46 ` fweimer at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: fweimer at redhat dot com @ 2014-06-17 4:46 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=14543
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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end of thread, other threads:[~2014-06-17 4:46 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-09-04 15:52 [Bug stdio/14543] New: fseek sets invalid status in the internal buffer in wide mode siddhesh at redhat dot com
2012-09-04 15:54 ` [Bug stdio/14543] " siddhesh at redhat dot com
2012-09-13 14:16 ` siddhesh at redhat dot com
2012-09-28 13:31 ` siddhesh at redhat dot com
2014-06-17 4:46 ` fweimer at redhat dot com
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