Move fcntl.h functions into their own directory.

libc/Makefile

@@ -180,7 +180,6 @@ $(CPUDIR)/fork.o \
 $(CPUDIR)/setjmp.o \
 $(CPUDIR)/signal.o \
 $(CPUDIR)/syscall.o \
-creat.o \
 dirent/fddir-sortix.o \
 dirent/scandir.o \
 dispmsg_issue.o \
@@ -206,7 +205,10 @@ fchown.o \
 fchrootat.o \
 fchroot.o \
 fcloseall.o \
-fcntl.o \
+fcntl/creat.o \
+fcntl/fcntl.o \
+fcntl/openat.o \
+fcntl/open.o \
 fdio.o \
 fgetpos.o \
 fileno.o \
@@ -283,8 +285,6 @@ netdb/sethostent.o \
 netdb/setnetent.o \
 netdb/setprotoent.o \
 netdb/setservent.o \
-openat.o \
-open.o \
 pathconf.o \
 pipe.o \
 poll.o \

libc/fcntl/creat.cpp

@@ -17,7 +17,7 @@
     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/>.
 
-    creat.cpp
+    fcntl/creat.cpp
     Create a file.
 
 *******************************************************************************/

libc/fcntl/fcntl.cpp

@@ -17,7 +17,7 @@
     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/>.
 
-    fcntl.cpp
+    fcntl/fcntl.cpp
     Manipulates a file descriptor.
 
 *******************************************************************************/

libc/fcntl/open.cpp

@@ -17,7 +17,7 @@
     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/>.
 
-    open.cpp
+    fcntl/open.cpp
     Open a file.
 
 *******************************************************************************/

libc/fcntl/openat.cpp

@@ -17,7 +17,7 @@
     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/>.
 
-    openat.cpp
+    fcntl/openat.cpp
     Open a file relative to directory.
 
 *******************************************************************************/