Add lchown(2).

libc/Makefile

@@ -167,6 +167,7 @@ ioleast.o \
 isatty.o \
 kernelinfo.o \
 kill.o \
+lchown.o \
 linkat.o \
 link.o \
 localeconv.o \

libc/include/unistd.h

@@ -109,7 +109,6 @@ pid_t getpgid(pid_t);
 pid_t getpgrp(void);
 pid_t getsid(pid_t);
 uid_t getuid(void);
-int lchown(const char*, uid_t, gid_t);
 int lockf(int, int, off_t);
 int nice(int);
 long pathconf(const char*, int);
@@ -166,6 +165,7 @@ char* get_current_dir_name(void);
 pid_t getpid(void);
 pid_t getppid(void);
 int isatty(int);
+int lchown(const char*, uid_t, gid_t);
 int link(const char*, const char*);
 int linkat(int, const char*, int, const char*, int);
 off_t lseek(int, off_t, int);

libc/lchown.cpp

@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    lchown.cpp
+    Changes the owner and group of a file.
+
+*******************************************************************************/
+
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+
+extern "C" int lchown(const char* path, uid_t owner, gid_t group)
+{
+	return fchownat(AT_FDCWD, path, owner, group, AT_SYMLINK_NOFOLLOW);
+}