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