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Backport fcntl.h AIX fix from the trunk.

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This fixes a bug with the shell freezing.  See:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17598#185
Merge from gnulib, incorporating:
2014-05-31 dup2, fcntl, fcntl-h: port to AIX 7.1
* lib/fcntl.in.h, m4/dup2.m4, m4/fcntl.m4:
Update from gnulib.
This commit is contained in:
Paul Eggert 2014-06-11 13:03:46 -07:00
parent df907af0dd
commit 0071d45b61
4 changed files with 47 additions and 3 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2014-06-11 Paul Eggert <eggert@cs.ucla.edu>
Backport fcntl.h AIX fix from the trunk (Bug#17598).
This fixes a bug with the shell freezing. See:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17598#185
Merge from gnulib, incorporating:
2014-05-31 dup2, fcntl, fcntl-h: port to AIX 7.1
* lib/fcntl.in.h, m4/dup2.m4, m4/fcntl.m4:
Update from gnulib.
2014-06-07 Paul Eggert <eggert@cs.ucla.edu>
Port better to AIX (Bug#17598).

16
lib/fcntl.in.h
View file

@ -186,6 +186,22 @@ _GL_WARN_ON_USE (openat, "openat is not portable - "
/* Fix up the O_* macros. */
/* AIX 7.1 with XL C 12.1 defines O_CLOEXEC, O_NOFOLLOW, and O_TTY_INIT
to values outside 'int' range, so omit these misdefinitions.
But avoid namespace pollution on non-AIX systems. */
#ifdef _AIX
# include <limits.h>
# if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX)
# undef O_CLOEXEC
# endif
# if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
# undef O_NOFOLLOW
# endif
# if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX)
# undef O_TTY_INIT
# endif
#endif
#if !defined O_DIRECT && defined O_DIRECTIO
/* Tru64 spells it 'O_DIRECTIO'. */
# define O_DIRECT O_DIRECTIO

12
m4/dup2.m4
View file

@ -8,6 +8,7 @@ AC_DEFUN([gl_FUNC_DUP2],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([getdtablesize])
m4_ifdef([gl_FUNC_DUP2_OBSOLETE], [
AC_CHECK_FUNCS_ONCE([dup2])
if test $ac_cv_func_dup2 = no; then
@ -23,6 +24,11 @@ AC_DEFUN([gl_FUNC_DUP2],
#include <fcntl.h>
#include <errno.h>]],
[int result = 0;
#ifdef HAVE_GETDTABLESIZE
int bad_fd = getdtablesize ();
#else
int bad_fd = 1000000;
#endif
#ifdef FD_CLOEXEC
if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
result |= 1;
@ -37,7 +43,7 @@ AC_DEFUN([gl_FUNC_DUP2],
if (dup2 (0, 0) != -1)
result |= 8;
/* Many gnulib modules require POSIX conformance of EBADF. */
if (dup2 (2, 1000000) == -1 && errno != EBADF)
if (dup2 (2, bad_fd) == -1 && errno != EBADF)
result |= 16;
/* Flush out some cygwin core dumps. */
if (dup2 (2, -1) != -1 || errno != EBADF)
@ -56,7 +62,9 @@ AC_DEFUN([gl_FUNC_DUP2],
linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a
# closed fd may yield -EBADF instead of -1 / errno=EBADF.
gl_cv_func_dup2_works="guessing no" ;;
freebsd*) # on FreeBSD 6.1, dup2(1,1000000) gives EMFILE, not EBADF.
aix* | freebsd*)
# on AIX 7.1 and FreeBSD 6.1, dup2 (1,toobig) gives EMFILE,
# not EBADF.
gl_cv_func_dup2_works="guessing no" ;;
haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC.
gl_cv_func_dup2_works="guessing no" ;;

12
m4/fcntl.m4
View file

@ -19,7 +19,7 @@ AC_DEFUN([gl_FUNC_FCNTL],
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([fcntl])
AC_CHECK_FUNCS_ONCE([fcntl getdtablesize])
if test $ac_cv_func_fcntl = no; then
gl_REPLACE_FCNTL
else
@ -28,11 +28,21 @@ AC_DEFUN([gl_FUNC_FCNTL],
AC_CACHE_CHECK([whether fcntl handles F_DUPFD correctly],
[gl_cv_func_fcntl_f_dupfd_works],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_GETDTABLESIZE
# include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
]], [[int result = 0;
#ifdef HAVE_GETDTABLESIZE
int bad_fd = getdtablesize ();
#else
int bad_fd = 1000000;
#endif
if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
if (errno != EINVAL) result |= 2;
if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4;
if (errno != EINVAL) result |= 8;
return result;
]])],
[gl_cv_func_fcntl_f_dupfd_works=yes],