hardcoresushi/libgocryptfs
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main: error out when the mount shadows the cipherdir

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For example, we cannot mount "/home/user/.cipher" at "/home/user"
because the mount will hide ".cipher" also for us.

Doing it anyway used to cause a nasty hang.
This commit is contained in:
Jakob Unterwurzacher 2016-10-08 18:39:21 +02:00
parent 631c538f13
commit 04cdc695f0
1 changed files with 7 additions and 0 deletions
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7
mount.go
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@ -36,6 +36,13 @@ func doMount(args *argContainer) int {
tlog.Fatal.Printf("Invalid mountpoint: %v", err) tlog.Fatal.Printf("Invalid mountpoint: %v", err)
os.Exit(ErrExitMountPoint) os.Exit(ErrExitMountPoint)
} }
// We cannot mount "/home/user/.cipher" at "/home/user" because the mount
// will hide ".cipher" also for us.
if strings.HasPrefix(args.cipherdir, args.mountpoint) {
tlog.Fatal.Printf("Mountpoint %q would shadow cipherdir %q, this is not supported",
args.mountpoint, args.cipherdir)
os.Exit(ErrExitMountPoint)
}
if args.nonempty { if args.nonempty {
err = checkDir(args.mountpoint) err = checkDir(args.mountpoint)
} else { } else {