/* Duplicate an open file descriptor to a specified file descriptor.
- Copyright (C) 1999, 2004, 2005, 2006, 2007, 2009 Free Software
- Foundation, Inc.
+ Copyright (C) 1999, 2004-2007, 2009-2010 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
# include <windows.h>
#endif
-#if REPLACE_DUP2
+#if HAVE_DUP2
# undef dup2
}
return fd;
}
+ /* Wine 1.0.1 return 0 when desired_fd is negative but not -1:
+ http://bugs.winehq.org/show_bug.cgi?id=21289 */
+ if (desired_fd < 0)
+ {
+ errno = EBADF;
+ return -1;
+ }
# endif
result = dup2 (fd, desired_fd);
# ifdef __linux__
/* Correct a cygwin 1.5.x errno value. */
else if (result == -1 && errno == EMFILE)
errno = EBADF;
-#if REPLACE_FCHDIR
- if (fd != desired_fd && result == desired_fd)
- result = _gl_register_dup (fd, desired_fd);
-#endif
+# if REPLACE_FCHDIR
+ if (fd != desired_fd && result != -1)
+ result = _gl_register_dup (fd, result);
+# endif
return result;
}
-#else /* !REPLACE_DUP2 */
+#else /* !HAVE_DUP2 */
/* On older platforms, dup2 did not exist. */
int
dup2 (int fd, int desired_fd)
{
- int result;
- if (fd == desired_fd)
- return fcntl (fd, F_GETFL) < 0 ? -1 : fd;
+ int result = fcntl (fd, F_GETFL) < 0 ? -1 : fd;
+ if (result == -1 || fd == desired_fd)
+ return result;
close (desired_fd);
# ifdef F_DUPFD
result = fcntl (fd, F_DUPFD, desired_fd);
+# if REPLACE_FCHDIR
+ if (0 <= result)
+ result = _gl_register_dup (fd, result);
+# endif
# else
result = dupfd (fd, desired_fd);
# endif
-#if REPLACE_FCHDIR
- if (0 <= result)
- result = _gl_register_dup (fd, desired_fd);
-#endif
+ if (result == -1 && (errno == EMFILE || errno == EINVAL))
+ errno = EBADF;
return result;
}
-#endif /* !REPLACE_DUP2 */
+#endif /* !HAVE_DUP2 */