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//go:build (freebsd && cgo) || (openbsd && cgo) || (darwin && cgo)
// +build freebsd,cgo openbsd,cgo darwin,cgo
package mountinfo
/*
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
*/
import "C"
import (
"fmt"
"reflect"
"unsafe"
)
// parseMountTable returns information about mounted filesystems
func parseMountTable(filter FilterFunc) ([]*Info, error) {
var rawEntries *C.struct_statfs
count := int(C.getmntinfo(&rawEntries, C.MNT_WAIT))
if count == 0 {
return nil, fmt.Errorf("failed to call getmntinfo")
}
var entries []C.struct_statfs
header := (*reflect.SliceHeader)(unsafe.Pointer(&entries))
header.Cap = count
header.Len = count
header.Data = uintptr(unsafe.Pointer(rawEntries))
var out []*Info
for _, entry := range entries {
var mountinfo Info
var skip, stop bool
mountinfo.Mountpoint = C.GoString(&entry.f_mntonname[0])
mountinfo.FSType = C.GoString(&entry.f_fstypename[0])
mountinfo.Source = C.GoString(&entry.f_mntfromname[0])
if filter != nil {
// filter out entries we're not interested in
skip, stop = filter(&mountinfo)
if skip {
continue
}
}
out = append(out, &mountinfo)
if stop {
break
}
}
return out, nil
}
func mounted(path string) (bool, error) {
path, err := normalizePath(path)
if err != nil {
return false, err
}
// Fast path: compare st.st_dev fields.
// This should always work for FreeBSD and OpenBSD.
mounted, err := mountedByStat(path)
if err == nil {
return mounted, nil
}
// Fallback to parsing mountinfo
return mountedByMountinfo(path)
}
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