[Bug stdio/18757] New: fmemopen fails to set errno on failure

[Bug stdio/18757] New: fmemopen fails to set errno on failure

[msebor at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18757

            Bug ID: 18757
           Summary: fmemopen fails to set errno on failure
           Product: glibc
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: stdio
          Assignee: unassigned at sourceware dot org
          Reporter: msebor at redhat dot com
  Target Milestone: ---

POSIX specifies that on failure, "fmemopen() shall return a null pointer and
errno shall be set to indicate the error."  When linked against the top of
trunk, the following program abort indicating that the glibc implementation
fails to conform to this requirement (the function fails when passed an invalid
open mode but doesn't set errno).

#include <assert.h>
#include <errno.h>
#include <stdio.h>

int main (void)
{
    char c = 0;
    FILE *f = fmemopen (&c, 1, "?");
    printf ("%p, errno = %m\n", f);
    assert (f == 0 && errno == EINVAL);
    return 0;
}
(nil), errno = Success
a.out: /build/tmp/t.c:10: main: Assertion `f == 0 && (*__errno_location ()) ==
22' failed.

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[Bug stdio/18757] fmemopen fails to set errno on failure

[ppluzhnikov at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18757

Paul Pluzhnikov <ppluzhnikov at google dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppluzhnikov at google dot com
           Assignee|unassigned at sourceware dot org   |ppluzhnikov at google dot com

--- Comment #1 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Confirmed. This one has been broken since at least glibc-2.3.6

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[Bug stdio/18757] fmemopen fails to set errno on failure

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=18757

--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".

The branch, master has been updated
       via  2d8e36e691f460aeeb3362fd44c71cafc7bb5852 (commit)
      from  74589f738efd72e07f759a4aabd2e32613aaefb8 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2d8e36e691f460aeeb3362fd44c71cafc7bb5852

commit 2d8e36e691f460aeeb3362fd44c71cafc7bb5852
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date:   Tue Sep 1 08:48:15 2015 -0700

    Fix BZ #18757.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog             |    7 +++++++
 NEWS                  |    5 +++--
 libio/iofopncook.c    |    1 +
 libio/test-fmemopen.c |   21 +++++++++++++++++++++
 4 files changed, 32 insertions(+), 2 deletions(-)

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[Bug stdio/18757] fmemopen fails to set errno on failure

[ppluzhnikov at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18757

Paul Pluzhnikov <ppluzhnikov at google dot com> changed:

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

--- Comment #3 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Fixed on trunk.

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[Bug stdio/18757] fmemopen fails to set errno on failure

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=18757

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.23

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