summaryrefslogtreecommitdiff
path: root/mount.go
diff options
context:
space:
mode:
authorJakob Unterwurzacher2017-05-03 08:59:21 +0200
committerJakob Unterwurzacher2017-05-03 08:59:21 +0200
commitb32fc212afebd5014cc037f046a6a7fa75c154a3 (patch)
tree1ecd69a788e1910f502d8336771fa371dafa0434 /mount.go
parent2d43288bc821a861898125a6e37bed4c5553bd7d (diff)
main: RLIMIT_NOFILE: cap to 4096
We don't want to set the limit to unlimited if "Max" is unlimited. Hard-cap to 4096.
Diffstat (limited to 'mount.go')
-rw-r--r--mount.go35
1 files changed, 23 insertions, 12 deletions
diff --git a/mount.go b/mount.go
index 20a5970..b85692c 100644
--- a/mount.go
+++ b/mount.go
@@ -147,18 +147,9 @@ func doMount(args *argContainer) int {
// Send SIGUSR1 to our parent
sendUsr1(args.notifypid)
}
- // Increase the number of open files limit up to the hard limit. It's not
- // dramatic if that fails, so do it after we have switched to syslog and not
- // bother the user with warning.
- var lim syscall.Rlimit
- syscall.Getrlimit(syscall.RLIMIT_NOFILE, &lim)
- lim.Cur = lim.Max
- err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &lim)
- if err != nil {
- tlog.Warn.Printf("Setting RLIMIT_NOFILE failed: %v", err)
- } else if lim.Cur < 4096 {
- tlog.Warn.Printf("Low hard limit for RLIMIT_NOFILE: %d", lim.Cur)
- }
+ // Increase the open file limit to 4096. This is not essential, so do it after
+ // we have switched to syslog and don't bother the user with warnings.
+ setOpenFileLimit()
// Wait for SIGINT in the background and unmount ourselves if we get it.
// This prevents a dangling "Transport endpoint is not connected"
// mountpoint if the user hits CTRL-C.
@@ -181,6 +172,26 @@ func doMount(args *argContainer) int {
return 0
}
+// setOpenFileLimit tries to increase the open file limit to 4096 (the default hard
+// limit on Linux).
+func setOpenFileLimit() {
+ var lim syscall.Rlimit
+ err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &lim)
+ if err != nil {
+ tlog.Warn.Printf("Getting RLIMIT_NOFILE failed: %v", err)
+ return
+ }
+ if lim.Cur >= 4096 {
+ return
+ }
+ lim.Cur = 4096
+ err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &lim)
+ if err != nil {
+ tlog.Warn.Printf("Setting RLIMIT_NOFILE to %+v failed: %v", lim, err)
+ // %+v output: "{Cur:4097 Max:4096}" ^
+ }
+}
+
// initFuseFrontend - initialize gocryptfs/fusefrontend
// Calls os.Exit on errors
func initFuseFrontend(key []byte, args *argContainer, confFile *configfile.ConfFile) *fuse.Server {