From 5642bb6fe16fccc2afb7b313c8fbef8a4d67efdf Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Sun, 29 Oct 2017 21:00:06 +0100
Subject: cryptfs.bin: 10 Versuche zum Einhängen und luks-Öffnen, sowie
 beliebig viele Versuche zum Aushängen und luks-Schließen
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---
 cryptfs.bin.in | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/cryptfs.bin.in b/cryptfs.bin.in
index 9e8e1e7..8bfa29a 100644
--- a/cryptfs.bin.in
+++ b/cryptfs.bin.in
@@ -147,6 +147,8 @@ is_unlocked() {
 
 do_mount() {
   local inner_fs
+  local max_tries
+  local mount_paramters
   if is_mounted "$1"; then
     return
   fi
@@ -176,7 +178,15 @@ do_mount() {
   if [ -n "${inner_fs}" ]; then
     do_unmount -l "${inner_fs}"
   fi
-  mount $(mount_details all "$1")
+  max_tries=10
+  mount_parameters=$(mount_details all "$1")
+  while ! mount ${mount_parameters}; do
+    max_tries=$((max_tries-1))
+    if [ ${max_tries} -le 0 ]; then
+      exit 1
+    fi
+    sleep 1
+  done
   if [ -n "${inner_fs}" ]; then
     do_mount "${inner_fs}"
   fi
@@ -185,6 +195,7 @@ do_mount() {
 do_unmount() {
   local inner_fs
   local lazy
+  local mount_point
   if [ "x$1" = 'x-l' ]; then
     lazy='-l'
     shift
@@ -198,7 +209,11 @@ do_unmount() {
   if [ -n "${inner_fs}" ]; then
     do_unmount -l "${inner_fs}"
   fi
-  umount ${lazy} $(mount_details mp "$1")
+  mount_point=$(mount_details mp "$1")
+  while ! umount ${lazy} "${mount_point}"; do
+    fuser -k -M -m "${mount_point}"
+    sleep 1
+  done
   if [ -n "${inner_fs}" ]; then
     do_mount "${inner_fs}"
   fi
@@ -206,13 +221,23 @@ do_unmount() {
 
 do_crypt_close() {
   if is_unlocked "$1"; then
-    cryptsetup luksClose "$1"
+    while ! cryptsetup luksClose "$1"; do
+      sleep 1
+    done
   fi
 }
 
 do_crypt_open() {
+  local max_tries
   if ! is_unlocked "$1"; then
-    cryptsetup luksOpen "$2" "$1" --key-file="$3"
+    max_tries=10
+    while ! cryptsetup luksOpen "$2" "$1" --key-file="$3"; do
+      sleep 1
+      max_tries=$((max_tries-1))
+      if [ ${max_tries} -le 0 ]; then
+        exit 1
+      fi
+    done
   fi
 }
 
-- 
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