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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/fcntl.go | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/fcntl.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/fcntl.go new file mode 100644 index 0000000..e9b9912 --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/fcntl.go @@ -0,0 +1,37 @@ +// Copyright 2014 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 +// +build dragonfly freebsd linux netbsd openbsd + +package unix + +import "unsafe" + +// fcntl64Syscall is usually SYS_FCNTL, but is overridden on 32-bit Linux +// systems by fcntl_linux_32bit.go to be SYS_FCNTL64. +var fcntl64Syscall uintptr = SYS_FCNTL + +func fcntl(fd int, cmd, arg int) (int, error) { + valptr, _, errno := Syscall(fcntl64Syscall, uintptr(fd), uintptr(cmd), uintptr(arg)) + var err error + if errno != 0 { + err = errno + } + return int(valptr), err +} + +// FcntlInt performs a fcntl syscall on fd with the provided command and argument. +func FcntlInt(fd uintptr, cmd, arg int) (int, error) { + return fcntl(int(fd), cmd, arg) +} + +// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. +func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { + _, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk))) + if errno == 0 { + return nil + } + return errno +} |