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-rw-r--r--lib/dup2.c53
1 files changed, 52 insertions, 1 deletions
diff --git a/lib/dup2.c b/lib/dup2.c
index 9709b7a64..bb33eacdf 100644
--- a/lib/dup2.c
+++ b/lib/dup2.c
@@ -1,6 +1,6 @@
/* Duplicate an open file descriptor to a specified file descriptor.
- Copyright (C) 1999, 2004-2007, 2009-2014 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2004-2007, 2009-2016 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
@@ -85,6 +85,57 @@ ms_windows_dup2 (int fd, int desired_fd)
# define dup2 ms_windows_dup2
+# elif defined __KLIBC__
+
+# include <InnoTekLIBC/backend.h>
+
+static int
+klibc_dup2dirfd (int fd, int desired_fd)
+{
+ int tempfd;
+ int dupfd;
+
+ tempfd = open ("NUL", O_RDONLY);
+ if (tempfd == -1)
+ return -1;
+
+ if (tempfd == desired_fd)
+ {
+ close (tempfd);
+
+ char path[_MAX_PATH];
+ if (__libc_Back_ioFHToPath (fd, path, sizeof (path)))
+ return -1;
+
+ return open(path, O_RDONLY);
+ }
+
+ dupfd = klibc_dup2dirfd (fd, desired_fd);
+
+ close (tempfd);
+
+ return dupfd;
+}
+
+static int
+klibc_dup2 (int fd, int desired_fd)
+{
+ int dupfd;
+ struct stat sbuf;
+
+ dupfd = dup2 (fd, desired_fd);
+ if (dupfd == -1 && errno == ENOTSUP \
+ && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+ {
+ close (desired_fd);
+
+ return klibc_dup2dirfd (fd, desired_fd);
+ }
+
+ return dupfd;
+}
+
+# define dup2 klibc_dup2
# endif
int