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