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authorJesse Dunietz2018-10-06 15:49:33 -0400
committerJakob Unterwurzacher2018-10-11 20:16:45 +0200
commit87d3ed9187cb9caccaa8df0769d4cb722cc5bd00 (patch)
tree14963c3f66b1277f0bf7904650665156e102929a /cli_args.go
parent57a5a8791f8a8c957aef87aecfa4fa318873b744 (diff)
Add option for autounmount
Even though filesystem notifications aren't implemented for FUSE, I decided to try my hand at implementing the autounmount feature (#128). I based it on the EncFS autounmount code, which records filesystem accesses and checks every X seconds whether it's idled long enough to unmount. I've tested the feature locally, but I haven't added any tests for this flag. I also haven't worked with Go before. So please let me know if there's anything that should be done differently. One particular concern: I worked from the assumption that the open files table is unique per-filesystem. If that's not true, I'll need to add an open file count and associated lock to the Filesystem type instead. https://github.com/rfjakob/gocryptfs/pull/265
Diffstat (limited to 'cli_args.go')
-rw-r--r--cli_args.go12
1 files changed, 12 insertions, 0 deletions
diff --git a/cli_args.go b/cli_args.go
index dd00658..c073958 100644
--- a/cli_args.go
+++ b/cli_args.go
@@ -7,6 +7,7 @@ import (
"os"
"strconv"
"strings"
+ "time"
"github.com/hanwen/go-fuse/fuse"
"github.com/rfjakob/gocryptfs/internal/configfile"
@@ -33,6 +34,8 @@ type argContainer struct {
// Configuration file name override
config string
notifypid, scryptn int
+ // Idle time before autounmount
+ idle time.Duration
// Helper variables that are NOT cli options all start with an underscore
// _configCustom is true when the user sets a custom config file name.
_configCustom bool
@@ -187,6 +190,11 @@ func parseCliOpts() (args argContainer) {
"successful mount - used internally for daemonization")
flagSet.IntVar(&args.scryptn, "scryptn", configfile.ScryptDefaultLogN, "scrypt cost parameter logN. Possible values: 10-28. "+
"A lower value speeds up mounting and reduces its memory needs, but makes the password susceptible to brute-force attacks")
+
+ flagSet.DurationVar(&args.idle, "i", 0, "Alias for -idle")
+ flagSet.DurationVar(&args.idle, "idle", 0, "Auto-unmount after specified idle duration (ignored in reverse mode). "+
+ "Durations are specified like \"500s\" or \"2h45m\". 0 means stay mounted indefinitely.")
+
var dummyString string
flagSet.StringVar(&dummyString, "o", "", "For compatibility with mount(1), options can be also passed as a comma-separated list to -o on the end.")
// Actual parsing
@@ -247,6 +255,10 @@ func parseCliOpts() (args argContainer) {
tlog.Fatal.Printf("The options -extpass and -trezor cannot be used at the same time")
os.Exit(exitcodes.Usage)
}
+ if args.idle < 0 {
+ tlog.Fatal.Printf("Idle timeout cannot be less than 0")
+ os.Exit(exitcodes.Usage)
+ }
return args
}