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-rw-r--r--lib/dup2.c97
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/dup2.c b/lib/dup2.c
deleted file mode 100644
index a7d3cfd7..00000000
--- 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 */