socketcall(2): Document call argument

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/socketcall.2

@@ -26,6 +26,8 @@
 .SH NAME
 socketcall \- socket system calls
 .SH SYNOPSIS
+.B #include <linux/net.h>
+.sp
 .BI "int socketcall(int " call ", unsigned long *" args );
 .SH DESCRIPTION
 .BR socketcall ()
@@ -39,6 +41,112 @@ which are passed through to the appropriate call.
 User programs should call the appropriate functions by their usual names.
 Only standard library implementors and kernel hackers need to know about
 .BR socketcall ().
+.PP
+.TS
+tab(:);
+l l.
+\fIcall\fR:Man page
+T{
+.B SYS_SOCKET
+T}:T{
+.BR socket (2)
+T}
+T{
+.B SYS_BIND
+T}:T{
+.BR bind (2)
+T}
+T{
+.B SYS_CONNECT
+T}:T{
+.BR connect (2)
+T}
+T{
+.B SYS_LISTEN
+T}:T{
+.BR listen (2)
+T}
+T{
+.B SYS_ACCEPT
+T}:T{
+.BR accept (2)
+T}
+T{
+.B SYS_GETSOCKNAME
+T}:T{
+.BR getsockname (2)
+T}
+T{
+.B SYS_GETPEERNAME
+T}:T{
+.BR getpeername (2)
+T}
+T{
+.B SYS_SOCKETPAIR
+T}:T{
+.BR socketpair (2)
+T}
+T{
+.B SYS_SEND
+T}:T{
+.BR send (2)
+T}
+T{
+.B SYS_RECV
+T}:T{
+.BR recv (2)
+T}
+T{
+.B SYS_SENDTO
+T}:T{
+.BR sendto (2)
+T}
+T{
+.B SYS_RECVFROM
+T}:T{
+.BR recvfrom (2)
+T}
+T{
+.B SYS_SHUTDOWN
+T}:T{
+.BR shutdown (2)
+T}
+T{
+.B SYS_SETSOCKOPT
+T}:T{
+.BR setsockopt (2)
+T}
+T{
+.B SYS_GETSOCKOPT
+T}:T{
+.BR getsockopt (2)
+T}
+T{
+.B SYS_SENDMSG
+T}:T{
+.BR sendmsg (2)
+T}
+T{
+.B SYS_RECVMSG
+T}:T{
+.BR recvmsg (2)
+T}
+T{
+.B SYS_ACCEPT4
+T}:T{
+.BR accept4 (2)
+T}
+T{
+.B SYS_RECVMMSG
+T}:T{
+.BR recvmmsg (2)
+T}
+T{
+.B SYS_SENDMMSG
+T}:T{
+.BR sendmmsg (2)
+T}
+.TE
 .SH CONFORMING TO
 This call is specific to Linux, and should not be used in programs
 intended to be portable.