59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package mount
|
|
|
|
/*
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/_iovec.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/param.h>
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
func allocateIOVecs(options []string) []C.struct_iovec {
|
|
out := make([]C.struct_iovec, len(options))
|
|
for i, option := range options {
|
|
out[i].iov_base = unsafe.Pointer(C.CString(option))
|
|
out[i].iov_len = C.size_t(len(option) + 1)
|
|
}
|
|
return out
|
|
}
|
|
|
|
func mount(device, target, mType string, flag uintptr, data string) error {
|
|
isNullFS := false
|
|
|
|
xs := strings.Split(data, ",")
|
|
for _, x := range xs {
|
|
if x == "bind" {
|
|
isNullFS = true
|
|
}
|
|
}
|
|
|
|
options := []string{"fspath", target}
|
|
if isNullFS {
|
|
options = append(options, "fstype", "nullfs", "target", device)
|
|
} else {
|
|
options = append(options, "fstype", mType, "from", device)
|
|
}
|
|
rawOptions := allocateIOVecs(options)
|
|
for _, rawOption := range rawOptions {
|
|
defer C.free(rawOption.iov_base)
|
|
}
|
|
|
|
if errno := C.nmount(&rawOptions[0], C.uint(len(options)), C.int(flag)); errno != 0 {
|
|
reason := C.GoString(C.strerror(*C.__error()))
|
|
return fmt.Errorf("Failed to call nmount: %s", reason)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func unmount(target string, flag int) error {
|
|
return syscall.Unmount(target, flag)
|
|
}
|