syscall: GetsockoptInt.

R=rsc, iant
CC=golang-dev
https://golang.org/cl/4271060

src/pkg/syscall/syscall_linux.go

@@ -415,6 +415,13 @@ func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
 	return
 }
 
+func GetsockoptInt(fd, level, opt int) (value, errno int) {
+	var n int32
+	vallen := _Socklen(4)
+	errno = getsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), &vallen)
+	return int(n), errno
+}
+
 func SetsockoptInt(fd, level, opt int, value int) (errno int) {
 	var n = int32(value)
 	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), 4)
@@ -675,7 +682,6 @@ func Reboot(cmd int) (errno int) {
 // Sendto
 // Recvfrom
 // Socketpair
-// Getsockopt
 
 /*
  * Direct access

src/pkg/syscall/syscall_linux_386.go

@@ -130,6 +130,11 @@ func socket(domain int, typ int, proto int) (fd int, errno int) {
 	return
 }
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, errno = socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	return
+}
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, errno = socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	return

src/pkg/syscall/syscall_linux_amd64.go

@@ -40,6 +40,7 @@ package syscall
 //sys	connect(s int, addr uintptr, addrlen _Socklen) (errno int)
 //sysnb	getgroups(n int, list *_Gid_t) (nn int, errno int)
 //sysnb	setgroups(n int, list *_Gid_t) (errno int)
+//sys	getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
 //sys	setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
 //sysnb	socket(domain int, typ int, proto int) (fd int, errno int)
 //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int) (errno int)

src/pkg/syscall/syscall_linux_arm.go

@@ -57,6 +57,7 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, errno int)
 //sys	connect(s int, addr uintptr, addrlen _Socklen) (errno int)
 //sysnb	getgroups(n int, list *_Gid_t) (nn int, errno int) = SYS_GETGROUPS32
 //sysnb	setgroups(n int, list *_Gid_t) (errno int) = SYS_SETGROUPS32
+//sys	getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
 //sys	setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
 //sysnb	socket(domain int, typ int, proto int) (fd int, errno int)
 //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)

src/pkg/syscall/zsyscall_linux_386.go

-// mksyscall.sh -l32 syscall_linux.go syscall_linux_386.go
+// mksyscall.pl -l32 syscall_linux.go syscall_linux_386.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall

src/pkg/syscall/zsyscall_linux_amd64.go

-// mksyscall.sh syscall_linux.go syscall_linux_amd64.go
+// mksyscall.pl syscall_linux.go syscall_linux_amd64.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -1072,6 +1072,14 @@ func setgroups(n int, list *_Gid_t) (errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)

src/pkg/syscall/zsyscall_linux_arm.go

-// mksyscall.sh -b32 syscall_linux.go syscall_linux_arm.go
+// mksyscall.pl -b32 syscall_linux.go syscall_linux_arm.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -807,6 +807,14 @@ func setgroups(n int, list *_Gid_t) (errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)