Move sys/uio.h functions into their own directory.

libc/Makefile

@@ -230,13 +230,10 @@ netdb/setservent.o \
 poll/poll.o \
 poll/ppoll.o \
 popen.o \
-preadv.o \
 print.o \
 putc.o \
 pwd/pwent.o \
-pwritev.o \
 readdirents.o \
-readv.o \
 removeat.o \
 remove.o \
 renameat.o \
@@ -297,6 +294,10 @@ sys/stat/umask.o \
 sys/stat/utimensat.o \
 sys/stat/utimens.o \
 sys/time/gettimeofday.o \
+sys/uio/preadv.o \
+sys/uio/pwritev.o \
+sys/uio/readv.o \
+sys/uio/writev.o \
 termios/tcgetwinsize.o \
 time/clock_getres.o \
 time/clock_gettime.o \
@@ -399,7 +400,6 @@ utime.o \
 vscanf.o \
 wait.o \
 waitpid.o \
-writev.o \
 
 OBJS=\
 $(FREEOBJS) \

libc/sys/uio/preadv.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/>.
 
-    preadv.cpp
+    sys/uio/preadv.cpp
     Read data into multiple buffers.
 
 *******************************************************************************/

libc/sys/uio/pwritev.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/>.
 
-    pwritev.cpp
+    sys/uio/pwritev.cpp
     Write data from multiple buffers.
 
 *******************************************************************************/

libc/sys/uio/readv.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/>.
 
-    readv.cpp
+    sys/uio/readv.cpp
     Read data into multiple buffers.
 
 *******************************************************************************/

libc/sys/uio/writev.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/>.
 
-    writev.cpp
+    sys/uio/writev.cpp
     Write data from multiple buffers.
 
 *******************************************************************************/