kc3-lang/gnulib/modules

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    Commit

  • Hash : c7487319
    Author : Eric Blake
    Date : 2011-06-21T08:50:51 

    strerror_r: fix OpenBSD behavior on 0

OpenBSD treats strerror_r(0,,) as a success, but with a message
"Undefined error: 0"; while this is distinct from strerror_r(-1,,)
returning "Unknown error: -1", it does not imply success.  Meanwhile,
if buf is short enough for ERANGE, then we can't use strstr to look
for "Unknown" or "Undefined" in the resulting message, like we had
been doing for strerror().  Fix this by shifting the burden - now
the strerror-override code guarantees that 0 will have an
override when needed.

* lib/strerror-override.c (strerror_override): Also override 0
when needed.
* lib/strerror-override.h (strerror_override): Likewise.
* lib/strerror.c (strerror): Simplify, now that 0 override is done
earlier.
* lib/strerror_r.c (strerror_r): Likewise.
* m4/strerror.m4 (gl_FUNC_STRERROR): Split detection of 0
behavior...
(gl_FUNC_STRERROR_0): ...into new macro.
* m4/strerror_r.m4 (gl_FUNC_STRERROR_R): Replace strerror_r if 0
is overridden.
(gl_FUNC_STRERROR_R_WORKS): Avoid extra tests if 0 is broken.
* modules/strerror-override (Files): Add strerror.m4.
(configure.ac): Also provide override for 0 when needed.
* doc/posix-functions/strerror.texi (strerror): Document this.
* doc/posix-functions/perror.texi (perror): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>

  • README

  • This directory contains metainformation about the gnulib modules, one or two
files per module. These files are used by gnulib-tool.

For every module,
  - the file <module> is the metainformation about the library code of the
    module,
  - the file <module>-tests is the metainformation about the unit test of
    the module (optional but recommended).

All the files in this directory are distributed under the following copyright:

  Copyright (C) 2002-2011 Free Software Foundation, Inc.
  Copying and distribution of this file, with or without modification,
  in any medium, are permitted without royalty provided the copyright
  notice and this notice are preserved.

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