diff options
author | Andreas Rottmann <a.rottmann@gmx.at> | 2010-05-27 18:23:17 +0200 |
---|---|---|
committer | Andreas Rottmann <a.rottmann@gmx.at> | 2010-05-27 18:23:17 +0200 |
commit | bd6adfa17d453e4c486e36fed4c5779db90a8a0e (patch) | |
tree | 9798677560d5f99061afe9f0db105a8c97f2438a /lib/dup2.c | |
parent | 79ca645d222db2e158784642c3b464a47bea26f3 (diff) | |
parent | 3e0814cd9862b89c7a39672672937477bd87ddfb (diff) |
Merge commit 'upstream/0.9.3'
Diffstat (limited to 'lib/dup2.c')
-rw-r--r-- | lib/dup2.c | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/dup2.c b/lib/dup2.c deleted file mode 100644 index a7d3cfd..0000000 --- a/lib/dup2.c +++ /dev/null @@ -1,97 +0,0 @@ -/* Duplicate an open file descriptor to a specified file descriptor. - - Copyright (C) 1999, 2004, 2005, 2006, 2007, 2009 Free Software - Foundation, Inc. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -/* written by Paul Eggert */ - -#include <config.h> - -/* Specification. */ -#include <unistd.h> - -#include <errno.h> -#include <fcntl.h> - -#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ -/* Get declarations of the Win32 API functions. */ -# define WIN32_LEAN_AND_MEAN -# include <windows.h> -#endif - -#if REPLACE_DUP2 - -# undef dup2 - -int -rpl_dup2 (int fd, int desired_fd) -{ - int result; -# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ - /* If fd is closed, mingw hangs on dup2 (fd, fd). If fd is open, - dup2 (fd, fd) returns 0, but all further attempts to use fd in - future dup2 calls will hang. */ - if (fd == desired_fd) - { - if ((HANDLE) _get_osfhandle (fd) == INVALID_HANDLE_VALUE) - { - errno = EBADF; - return -1; - } - return fd; - } -# endif - result = dup2 (fd, desired_fd); - if (result == 0) - result = desired_fd; - return result; -} - -#else /* !REPLACE_DUP2 */ - -/* On older platforms, dup2 did not exist. */ - -# ifndef F_DUPFD -static int -dupfd (int fd, int desired_fd) -{ - int duplicated_fd = dup (fd); - if (duplicated_fd < 0 || duplicated_fd == desired_fd) - return duplicated_fd; - else - { - int r = dupfd (fd, desired_fd); - int e = errno; - close (duplicated_fd); - errno = e; - return r; - } -} -# endif - -int -dup2 (int fd, int desired_fd) -{ - if (fd == desired_fd) - return fd; - close (desired_fd); -# ifdef F_DUPFD - return fcntl (fd, F_DUPFD, desired_fd); -# else - return dupfd (fd, desired_fd); -# endif -} -#endif /* !REPLACE_DUP2 */ |