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authorjilles <jilles@FreeBSD.org>2013-08-16 13:10:30 +0000
committerjilles <jilles@FreeBSD.org>2013-08-16 13:10:30 +0000
commit020684e443a1f78e36f1eaa4db5c133150e2f026 (patch)
tree30e10959c2614937a6af2cbc13a825ae2194ae9d /lib/libc/gen
parent5e5b39c47eb6fbcf9e6eeeecaa13a84dca61e7e4 (diff)
downloadFreeBSD-src-020684e443a1f78e36f1eaa4db5c133150e2f026.zip
FreeBSD-src-020684e443a1f78e36f1eaa4db5c133150e2f026.tar.gz
Add dup3(), based on F_DUP2FD and F_DUP2FD_CLOEXEC fcntls.
I removed functionality not proposed for POSIX in Austin group issue #411. A man page (my own) and test cases will follow in later commits. PR: 176233 Submitted by: Jukka Ukkonen
Diffstat (limited to 'lib/libc/gen')
-rw-r--r--lib/libc/gen/Makefile.inc1
-rw-r--r--lib/libc/gen/Symbol.map1
-rw-r--r--lib/libc/gen/dup3.c59
3 files changed, 61 insertions, 0 deletions
diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc
index fac1e43..ce9a430 100644
--- a/lib/libc/gen/Makefile.inc
+++ b/lib/libc/gen/Makefile.inc
@@ -31,6 +31,7 @@ SRCS+= __getosreldate.c \
disklabel.c \
dlfcn.c \
drand48.c \
+ dup3.c \
elf_utils.c \
erand48.c \
err.c \
diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map
index 9e6b38b..3cac832 100644
--- a/lib/libc/gen/Symbol.map
+++ b/lib/libc/gen/Symbol.map
@@ -383,6 +383,7 @@ FBSD_1.2 {
FBSD_1.3 {
clock_getcpuclockid;
dirfd;
+ dup3;
fdlopen;
__FreeBSD_libc_enter_restricted_mode;
getcontextx;
diff --git a/lib/libc/gen/dup3.c b/lib/libc/gen/dup3.c
new file mode 100644
index 0000000..ac8877c
--- /dev/null
+++ b/lib/libc/gen/dup3.c
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 2012 Jukka A. Ukkonen
+ * All rights reserved.
+ *
+ * This software was developed by Jukka Ukkonen for FreeBSD.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "un-namespace.h"
+
+int
+__dup3(int oldfd, int newfd, int flags)
+{
+ int how;
+
+ if (oldfd == newfd) {
+ errno = EINVAL;
+ return (-1);
+ }
+
+ if (flags & ~O_CLOEXEC) {
+ errno = EINVAL;
+ return (-1);
+ }
+
+ how = (flags & O_CLOEXEC) ? F_DUP2FD_CLOEXEC : F_DUP2FD;
+
+ return (_fcntl(oldfd, how, newfd));
+}
+
+__weak_reference(__dup3, dup3);
+__weak_reference(__dup3, _dup3);
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