From 109be507377fe7f6e8819ac94041d3fdcdf6fd2f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:18:25 +0200 Subject: Adding upstream version 1.19.8. Signed-off-by: Daniel Baumann --- src/internal/syscall/unix/nonblocking.go | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/internal/syscall/unix/nonblocking.go (limited to 'src/internal/syscall/unix/nonblocking.go') diff --git a/src/internal/syscall/unix/nonblocking.go b/src/internal/syscall/unix/nonblocking.go new file mode 100644 index 0000000..9e5f0fb --- /dev/null +++ b/src/internal/syscall/unix/nonblocking.go @@ -0,0 +1,21 @@ +// Copyright 2018 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. + +//go:build dragonfly || freebsd || linux || netbsd || openbsd + +package unix + +import "syscall" + +// FcntlSyscall is the number for the fcntl system call. This is +// usually SYS_FCNTL, but can be overridden to SYS_FCNTL64. +var FcntlSyscall uintptr = syscall.SYS_FCNTL + +func IsNonblock(fd int) (nonblocking bool, err error) { + flag, _, e1 := syscall.Syscall(FcntlSyscall, uintptr(fd), uintptr(syscall.F_GETFL), 0) + if e1 != 0 { + return false, e1 + } + return flag&syscall.O_NONBLOCK != 0, nil +} -- cgit v1.2.3