PSARC 2010/235 POSIX 1003.1-2008 *at(2) syscalls

6910251 need support for all POSIX.1-2008 *at(2) syscalls
6964835 mknod(2) auditing omits the pathname for invalid arguments

1 files changed, 58 insertions, 0 deletions

diff --git a/usr/src/lib/libc/port/sys/readlink.c b/usr/src/lib/libc/port/sys/readlink.c
new file mode 100644
index 0000000000..fc58441b53
--- /dev/null
+++ b/usr/src/lib/libc/port/sys/readlink.c
@@ -0,0 +1,58 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include "lint.h"
+#include <sys/syscall.h>
+#include <sys/unistd.h>
+#include <sys/fcntl.h>
+
+ssize_t
+readlinkat(int fd, const char *path, char *buf, size_t bufsize)
+{
+	sysret_t rval;
+	int error;
+
+	error = __systemcall(&rval, SYS_readlinkat, fd, path, buf, bufsize);
+	if (error)
+		(void) __set_errno(error);
+	return ((ssize_t)rval.sys_rval1);
+}
+
+#pragma weak _readlink = readlink
+ssize_t
+readlink(const char *path, char *buf, size_t bufsize)
+{
+#if defined(_RETAIN_OLD_SYSCALLS)
+	sysret_t rval;
+	int error;
+
+	error = __systemcall(&rval, SYS_readlink, path, buf, bufsize);
+	if (error)
+		(void) __set_errno(error);
+	return ((ssize_t)rval.sys_rval1);
+#else
+	return (readlinkat(AT_FDCWD, path, buf, bufsize));
+#endif
+}