syscall: GetsockoptInt.

src/pkg/syscall/syscall_linux.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // Linux system calls.
 // This file is compiled as ordinary Go code,
 // but it is also input to mksyscall,
 // which parses the //sys lines and generates system call stubs.
 // Note that sometimes we use a lowercase //sys name and
 // wrap it in our own nicer implementation.
@@ skipping 397 matching lines @@
         }
         fd, errno = socket(domain, typ, proto)
         return
 }
 
 func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
         errno = socketpair(domain, typ, proto, &fd)
         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)
 }
 
 func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (errno int) {
         return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(tv)), unsafe.Sizeof(*tv))
 }
 
 func SetsockoptLinger(fd, level, opt int, l *Linger) (errno int) {
@@ skipping 240 matching lines @@
 func PtraceDetach(pid int) (errno int) { return ptrace(PTRACE_DETACH, pid, 0, 0) }
 
 //sys   reboot(magic1 uint, magic2 uint, cmd int, arg string) (errno int)
 func Reboot(cmd int) (errno int) {
         return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "")
 }
 
 // Sendto
 // Recvfrom
 // Socketpair
-// Getsockopt
 
 /*
  * Direct access
  */
 //sys   Access(path string, mode uint32) (errno int)
 //sys   Acct(path string) (errno int)
 //sys   Adjtimex(buf *Timex) (state int, errno int)
 //sys   Chdir(path string) (errno int)
 //sys   Chmod(path string, mode uint32) (errno int)
 //sys   Chroot(path string) (errno int)
@@ skipping 212 matching lines @@
 // Umount2
 // Uselib
 // Utimensat
 // Vfork
 // Vhangup
 // Vmsplice
 // Vserver
 // Waitid
 // Writev
 // _Sysctl