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Imported Upstream version 2.7.1
[platform/upstream/bison.git]
/
lib
/
dup2.c
diff --git
a/lib/dup2.c
b/lib/dup2.c
index
f6d0f1c
..
9219eb3
100644
(file)
--- a/
lib/dup2.c
+++ b/
lib/dup2.c
@@
-1,6
+1,6
@@
/* Duplicate an open file descriptor to a specified file descriptor.
/* Duplicate an open file descriptor to a specified file descriptor.
- Copyright (C) 1999, 2004-2007, 2009-201
2
Free Software Foundation, Inc.
+ Copyright (C) 1999, 2004-2007, 2009-201
3
Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@
-95,7
+95,10
@@
rpl_dup2 (int fd, int desired_fd)
# ifdef F_GETFL
/* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
On Cygwin 1.5.x, dup2 (1, 1) returns 0.
# ifdef F_GETFL
/* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
On Cygwin 1.5.x, dup2 (1, 1) returns 0.
+ On Cygwin 1.7.17, dup2 (1, -1) dumps core.
On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC. */
On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC. */
+ if (desired_fd < 0)
+ fd = desired_fd;
if (fd == desired_fd)
return fcntl (fd, F_GETFL) == -1 ? -1 : fd;
# endif
if (fd == desired_fd)
return fcntl (fd, F_GETFL) == -1 ? -1 : fd;
# endif