[Bug libc/12817] New: strace found that wprintf always causes __llseek error

[Bug libc/12817] New: strace found that wprintf always causes __llseek error

[zuohsh at sohu dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12817

           Summary: strace found that wprintf always causes __llseek error
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: zuohsh@sohu.com


Below is the code I used.
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <wchar.h>

int main(int argc, char * argv[])
{
    int mode=0;
    wchar_t wstr[] = L"中文";     //the string is a Chinese word
    setlocale(LC_ALL, "zh_CN.UTF-8"); 
    wprintf(L"%ls\n",wstr);    //print the Chinese word to stdout
    return 0;
}

Compile it: gcc wprintf.c -o wprintf. And then run "strace ./wprintf" ,I got a
seek error:
......
_llseek(1, 0, 0xbf97b3d0, SEEK_CUR)     = -1 ESPIPE (Illegal seek)
......
Can you solve the issue? Thanks.

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[Bug libc/12817] strace found that wprintf always causes __llseek error

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12817

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-07-20 21:26:55 UTC ---
(In reply to comment #0)
> Can you solve the issue? Thanks.

There is no issue.  That's just part of the way the streams work.  It is
unfortunately possible to open a stream for an open file descriptor which is
not at offset 0.  We need that information.  The error is not due to any
failure, it's just because you have a tty as the output device.

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[Bug libc/12817] strace found that wprintf always causes __llseek error

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12817

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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