From c0cddfc63083f8b34eb9cc282332b6430a41e5a8 Mon Sep 17 00:00:00 2001
From: "Gerd v. Egidy" <gerd@egidy.de>
Date: Mon, 1 Aug 2022 22:40:48 +0200
Subject: [PATCH] add --readonly option to mountall

---
 airootfs/usr/share/sysrescue/bin/mountall | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/airootfs/usr/share/sysrescue/bin/mountall b/airootfs/usr/share/sysrescue/bin/mountall
index 93012e8..79b3b93 100755
--- a/airootfs/usr/share/sysrescue/bin/mountall
+++ b/airootfs/usr/share/sysrescue/bin/mountall
@@ -15,10 +15,11 @@ print_help()
     echo "mountall - mount all suitable block devices"
     echo ""
     echo "Usage:"
-    echo "mountall [-n|--no-bind] [-v|--verbose]"
+    echo "mountall [-n|--no-bind] [-o|--ro|--readonly] [-v|--verbose]"
     echo ""
     echo "--no-bind                   Don't try to bind-mount /dev /proc and /sys when"
     echo "                            the partition has these dirs"
+    echo "--readonly                  Mount read-only"
     echo "--verbose                   Verbose output."
     echo ""
     echo "See https://www.system-rescue.org/scripts/mountall/ for details."
@@ -51,11 +52,12 @@ parse_args()
         exit 1
     fi
 
-    local OPTIONS="nvh"
-    local LONGOPTS="no-bind,verbose,help"
+    local OPTIONS="novh"
+    local LONGOPTS="no-bind,readonly,ro,verbose,help"
 
     # option variables as globals, set to default values
     declare -g BIND=1
+    declare -g READONLY=0
     declare -g VERBOSE=0
     
     # -regarding ! and PIPESTATUS see above
@@ -79,6 +81,10 @@ parse_args()
                 BIND=0
                 shift
                 ;;
+            -o|--readonly|--ro)
+                READONLY=1
+                shift
+                ;;
             -v|--verbose)
                 VERBOSE=1
                 shift
@@ -263,8 +269,14 @@ try_mount()
     
     create_mountpoint "$DEV" || return
 
-    if ! mount "$DEV" "$MOUNTPOINT"; then
-        echo "error mounting $DEV"
+    local OPTIONS=""
+    if [[ $READONLY -eq 1 ]]; then
+        [[ $VERBOSE -eq 1 ]] && echo "mounting read-only"
+        OPTIONS="--read-only"
+    fi
+
+    if ! mount $OPTIONS "$DEV" "$MOUNTPOINT"; then
+        echo "error mounting $DEV to $MOUNTPOINT (options $OPTIONS)"
         return
     fi