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78 lines
1.5 KiB
78 lines
1.5 KiB
//go:build openbsd && cgo
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// +build openbsd,cgo
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/*
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Due to how OpenBSD mount(2) works, filesystem types need to be
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supported explicitly since it uses separate structs to pass
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filesystem-specific arguments.
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For now only UFS/FFS is supported as it's the default fs
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on OpenBSD systems.
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See: https://man.openbsd.org/mount.2
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*/
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package mount
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/*
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#include <sys/types.h>
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#include <sys/mount.h>
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*/
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import "C"
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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func createExportInfo(readOnly bool) C.struct_export_args {
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exportFlags := C.int(0)
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if readOnly {
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exportFlags = C.MNT_EXRDONLY
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}
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out := C.struct_export_args{
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ex_root: 0,
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ex_flags: exportFlags,
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}
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return out
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}
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func createUfsArgs(device string, readOnly bool) unsafe.Pointer {
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out := &C.struct_ufs_args{
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fspec: C.CString(device),
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export_info: createExportInfo(readOnly),
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}
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return unsafe.Pointer(out)
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}
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func mount(device, target, mType string, flag uintptr, data string) error {
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readOnly := flag&RDONLY != 0
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var fsArgs unsafe.Pointer
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switch mType {
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case "ffs":
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fsArgs = createUfsArgs(device, readOnly)
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default:
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return &mountError{
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op: "mount",
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source: device,
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target: target,
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flags: flag,
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err: fmt.Errorf("unsupported file system type: %s", mType),
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}
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}
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if errno := C.mount(C.CString(mType), C.CString(target), C.int(flag), fsArgs); errno != 0 {
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return &mountError{
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op: "mount",
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source: device,
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target: target,
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flags: flag,
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err: syscall.Errno(errno),
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}
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}
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return nil
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}
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