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dup2, fcntl, fcntl-h: port to AIX 7.1

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This fixes some porting problems discovered when testing the latest
grep snapshot on AIX 7.1.  I don't think if fixes any bugs
in grep but it could be important for other applications.
* doc/posix-functions/dup2.texi:
* doc/posix-functions/fcntl.texi:
* doc/posix-headers/fcntl.texi:
Document AIX bugs.
* lib/fcntl.in.h (O_CLOEXEC, O_NOFOLLOW, O_TTY_INIT) [_AIX]:
Define to 0 if outside 'int' range.
* m4/dup2.m4 (gl_FUNC_DUP2):
* m4/fcntl.m4 (gl_FUNC_FCNTL):
Check for getdtablesize.  If it's available, test a value just
outside its range instead of testing 1000000.  When cross-compiling,
guess that AIX will fail this improved test.
This commit is contained in:
Paul Eggert
2014-05-31 14:07:57 -07:00
parent b1b4baa316
commit 93ce02b4fa
7 changed files with 64 additions and 7 deletions
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4
doc/posix-functions/dup2.texi
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@@ -39,9 +39,9 @@ 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
extremely large targets, which interferes with using
large targets, which interferes with using
@code{dup2(fd,fd)==fd)} as the minimal @code{EBADF} filter:
FreeBSD 6.1, Cygwin 1.5.
AIX 7.1, FreeBSD 6.1, Cygwin 1.5.
@end itemize
Portability problems fixed by Gnulib module @code{dup2-obsolete}:

4
doc/posix-functions/fcntl.texi
View File

@@ -16,7 +16,7 @@ mingw, MSVC 9.
This function does not support @code{F_DUPFD_CLOEXEC} on some
platforms:
glibc with Linux kernels before 2.6.24,
Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11,
Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 7.1, HP-UX 11,
IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.7.1, Interix 3.5,
BeOS.
Note that the gnulib replacement code is functional but not atomic.
@@ -24,7 +24,7 @@ Note that the gnulib replacement code is functional but not atomic.
@item
The @code{F_DUPFD} action of this function does not reject
out-of-range targets properly on some platforms:
Cygwin 1.5.x, Haiku.
AIX 7.1, Cygwin 1.5.x, Haiku.
@item
The @code{F_DUPFD} action of this function mistakenly clears