code review 84830043: syscall: fix Getfsstat() for BSD

src/pkg/syscall/syscall_dragonfly.go

Index: src/pkg/syscall/syscall_dragonfly.go
===================================================================
--- a/src/pkg/syscall/syscall_dragonfly.go
+++ b/src/pkg/syscall/syscall_dragonfly.go
@@ -101,6 +101,21 @@
 	return extpwrite(fd, p, 0, offset)
 }
 
+func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	var bufsize uintptr
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+		bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
+	}
+	r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
 /*
  * Exposed directly
  */
@@ -129,7 +144,6 @@
 //sys	Getdtablesize() (size int)
 //sysnb	Getegid() (egid int)
 //sysnb	Geteuid() (uid int)
-//sys	Getfsstat(buf []Statfs_t, flags int) (n int, err error)
 //sysnb	Getgid() (gid int)
 //sysnb	Getpgid(pid int) (pgid int, err error)
 //sysnb	Getpgrp() (pgrp int)