mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-16 01:22:18 +03:00
a39fbed384
Reported by Kevin Cernekee in: http://lists.gnu.org/archive/html/bug-gnulib/2015-02/msg00125.html * doc/posix-functions/dup2.texi (dup2): Document the bug. * m4/dup2.m4 (gl_FUNC_DUP2): Test for the bug.
60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
@node dup2
|
|
@section @code{dup2}
|
|
@findex dup2
|
|
|
|
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/dup2.html}
|
|
|
|
Gnulib module: dup2 or dup2-obsolete
|
|
|
|
Portability problems fixed by either Gnulib module @code{dup2} or @code{dup2-obsolete}:
|
|
@itemize
|
|
@item
|
|
This function always returns 0 for success on some platforms:
|
|
mingw, MSVC 9.
|
|
|
|
@item
|
|
This function can hang when duplicating an fd to itself on some platforms:
|
|
mingw, MSVC 9.
|
|
|
|
@item
|
|
This function crashes when invoked with invalid arguments on some platforms:
|
|
Cygwin 1.7.17, MSVC 9.
|
|
|
|
@item
|
|
This function crashes when invoked with valid arguments on some platforms:
|
|
Cygwin 1.7.25.
|
|
|
|
@item
|
|
This function fails with @code{EINVAL} when duplicating an fd to itself:
|
|
Android.
|
|
|
|
@item
|
|
This function resets the @code{FD_CLOEXEC} flag when duplicating an fd
|
|
to itself on some platforms:
|
|
Haiku.
|
|
|
|
@item
|
|
This function returns 0 for @code{dup2 (1, 1)} on some platforms:
|
|
Cygwin 1.5.x.
|
|
|
|
@item
|
|
This function may return @code{-EBADF} instead of @code{-1} on some platforms:
|
|
Linux releases between July 2008 and May 2009 (versions 2.6.27 to 2.6.29).
|
|
|
|
@item
|
|
This function returns @code{EMFILE} instead of @code{EBADF} for
|
|
large targets, which interferes with using
|
|
@code{dup2(fd,fd)==fd)} as the minimal @code{EBADF} filter:
|
|
AIX 7.1, FreeBSD 6.1, Cygwin 1.5.
|
|
@end itemize
|
|
|
|
Portability problems fixed by Gnulib module @code{dup2-obsolete}:
|
|
@itemize
|
|
@item
|
|
This function is missing on some older platforms.
|
|
@end itemize
|
|
|
|
Portability problems not fixed by Gnulib:
|
|
@itemize
|
|
@end itemize
|