unix: add readv/writev for illumos
iovec read/writes (readv, writev, preadv, pwritev) are present on
illumos, but they weren't added to the package. This commit adds
those missing features.
Updates golang/go#36201
Change-Id: Iecf2bab7ef846f5ca5d693e833491d819618c15d
GitHub-Last-Rev: 81a479f4c5f851f81e748cef6eb529c3f89cd1e1
GitHub-Pull-Request: golang/sys#64
Reviewed-on: https://go-review.googlesource.com/c/sys/+/224238
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
diff --git a/unix/syscall_illumos.go b/unix/syscall_illumos.go
new file mode 100644
index 0000000..99e62dc
--- /dev/null
+++ b/unix/syscall_illumos.go
@@ -0,0 +1,57 @@
+// 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.
+
+// illumos system calls not present on Solaris.
+
+// +build amd64,illumos
+
+package unix
+
+import "unsafe"
+
+func bytes2iovec(bs [][]byte) []Iovec {
+ iovecs := make([]Iovec, len(bs))
+ for i, b := range bs {
+ iovecs[i].SetLen(len(b))
+ if len(b) > 0 {
+ // somehow Iovec.Base on illumos is (*int8), not (*byte)
+ iovecs[i].Base = (*int8)(unsafe.Pointer(&b[0]))
+ } else {
+ iovecs[i].Base = (*int8)(unsafe.Pointer(&_zero))
+ }
+ }
+ return iovecs
+}
+
+//sys readv(fd int, iovs []Iovec) (n int, err error)
+
+func Readv(fd int, iovs [][]byte) (n int, err error) {
+ iovecs := bytes2iovec(iovs)
+ n, err = readv(fd, iovecs)
+ return n, err
+}
+
+//sys preadv(fd int, iovs []Iovec, off int64) (n int, err error)
+
+func Preadv(fd int, iovs [][]byte, off int64) (n int, err error) {
+ iovecs := bytes2iovec(iovs)
+ n, err = preadv(fd, iovecs, off)
+ return n, err
+}
+
+//sys writev(fd int, iovs []Iovec) (n int, err error)
+
+func Writev(fd int, iovs [][]byte) (n int, err error) {
+ iovecs := bytes2iovec(iovs)
+ n, err = writev(fd, iovecs)
+ return n, err
+}
+
+//sys pwritev(fd int, iovs []Iovec, off int64) (n int, err error)
+
+func Pwritev(fd int, iovs [][]byte, off int64) (n int, err error) {
+ iovecs := bytes2iovec(iovs)
+ n, err = pwritev(fd, iovecs, off)
+ return n, err
+}
