-#serial 17
-dnl Copyright (C) 2002, 2005, 2007, 2009-2012 Free Software Foundation, Inc.
+#serial 19
+dnl Copyright (C) 2002, 2005, 2007, 2009-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
/* Many gnulib modules require POSIX conformance of EBADF. */
if (dup2 (2, 1000000) == -1 && errno != EBADF)
result |= 16;
+ /* Flush out a cygwin core dump. */
+ if (dup2 (2, -1) != -1 || errno != EBADF)
+ result |= 32;
return result;
])
],
[gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
[case "$host_os" in
mingw*) # on this platform, dup2 always returns 0 for success
- gl_cv_func_dup2_works=no;;
+ gl_cv_func_dup2_works="guessing no" ;;
cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
- gl_cv_func_dup2_works=no;;
+ gl_cv_func_dup2_works="guessing no" ;;
linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a
# closed fd may yield -EBADF instead of -1 / errno=EBADF.
- gl_cv_func_dup2_works=no;;
+ gl_cv_func_dup2_works="guessing no" ;;
freebsd*) # on FreeBSD 6.1, dup2(1,1000000) gives EMFILE, not EBADF.
- gl_cv_func_dup2_works=no;;
+ gl_cv_func_dup2_works="guessing no" ;;
haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC.
- gl_cv_func_dup2_works=no;;
- *) gl_cv_func_dup2_works=yes;;
+ gl_cv_func_dup2_works="guessing no" ;;
+ *) gl_cv_func_dup2_works="guessing yes" ;;
esac])
])
- if test "$gl_cv_func_dup2_works" = no; then
- REPLACE_DUP2=1
- fi
+ case "$gl_cv_func_dup2_works" in
+ *yes) ;;
+ *)
+ REPLACE_DUP2=1
+ ;;
+ esac
fi
dnl Replace dup2() for supporting the gnulib-defined fchdir() function,
dnl to keep fchdir's bookkeeping up-to-date.