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-rw-r--r--sysdeps/generic/dup2.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/generic/dup2.c b/sysdeps/generic/dup2.c
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+/* Copyright (C) 1991, 1995, 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+/* Duplicate FD to FD2, closing the old FD2 and making FD2 be
+ open the same file as FD is. Return FD2 or -1. */
+int
+__dup2 (fd, fd2)
+ int fd;
+ int fd2;
+{
+ if (fd < 0 || fd2 < 0)
+ {
+ __set_errno (EBADF);
+ return -1;
+ }
+
+ if (fd == fd2)
+ /* No way to check that they are valid. */
+ return fd2;
+
+ __set_errno (ENOSYS);
+ return -1;
+}
+stub_warning (dup2)
+
+weak_alias (__dup2, dup2)
+#include <stub-tag.h>