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unix: add Dup3 on dragonfly

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Use the same implementation as on freebsd which is also what the
dragonfly libc uses.

Change-Id: I0ed513ae15fcb6dac77b2fc76f662723d66b75c6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/636435
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Tobias Klauser
2024-12-16 13:14:32 +01:00
committed by Gopher Robot
parent fe16172d11
commit a7f19e9c20
2 changed files with 14 additions and 2 deletions
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4
unix/dup3_test.go
View File

@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build freebsd || linux || netbsd || openbsd
//go:build dragonfly || freebsd || linux || netbsd || openbsd
package unix_test
@@ -16,7 +16,7 @@ import (
)
func TestDup3(t *testing.T) {
tempFile, err := os.Create(filepath.Join(t.TempDir(), "TestDup"))
tempFile, err := os.Create(filepath.Join(t.TempDir(), "TestDup3"))
if err != nil {
t.Fatal(err)
}

12
unix/syscall_dragonfly.go
View File

@@ -246,6 +246,18 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
return sendfile(outfd, infd, offset, count)
}
func Dup3(oldfd, newfd, flags int) error {
if oldfd == newfd || flags&^O_CLOEXEC != 0 {
return EINVAL
}
how := F_DUP2FD
if flags&O_CLOEXEC != 0 {
how = F_DUP2FD_CLOEXEC
}
_, err := fcntl(oldfd, how, newfd)
return err
}
/*
* Exposed directly
*/