tools: add edit mount option to mount-network-drive.sh

Allows editing share path, mount point, and options for an existing
fstab entry. CIFS entries also offer credential update (backs up the
old credentials file before overwriting). Backs up fstab before any
change and offers immediate remount to apply.

https://claude.ai/code/session_014CCYqVwW6d6f5dw1qRokYt

tools/mount-network-drive.sh

@@ -208,6 +208,128 @@ _do_mount() {
     ok "Done. $share is mounted at $mount_point"
 }
 
+# ── Edit a mount ─────────────────────────────────────────────────────────────
+edit_mount() {
+    echo ""
+    local entries=()
+    while IFS= read -r line; do
+        [[ -z "$line" || "$line" == \#* ]] && continue
+        entries+=("$line")
+    done < <(grep -E '\bcifs\b|\bnfs\b' /etc/fstab 2>/dev/null || true)
+
+    if [[ ${#entries[@]} -eq 0 ]]; then
+        warn "No network mounts found in /etc/fstab."
+        return 0
+    fi
+
+    echo "  Network mounts in /etc/fstab:"
+    echo ""
+    local i=1
+    for e in "${entries[@]}"; do
+        local mp; mp=$(echo "$e" | awk '{print $2}')
+        local src; src=$(echo "$e" | awk '{print $1}')
+        printf "  %2d)  %-30s  %s\n" "$i" "$src" "$mp"
+        i=$(( i + 1 ))
+    done
+    echo ""
+
+    local choice=""
+    read -r -p "  Edit entry number [cancel]: " choice
+    [[ -z "$choice" || ! "$choice" =~ ^[0-9]+$ ]] && { info "Cancelled."; return 0; }
+
+    local idx=$(( choice - 1 ))
+    [[ "$idx" -lt 0 || "$idx" -ge ${#entries[@]} ]] && { warn "Invalid selection."; return 0; }
+
+    local target_entry="${entries[$idx]}"
+    local target_src;  target_src=$(echo  "$target_entry" | awk '{print $1}')
+    local target_mp;   target_mp=$(echo   "$target_entry" | awk '{print $2}')
+    local target_fs;   target_fs=$(echo   "$target_entry" | awk '{print $3}')
+    local target_opts; target_opts=$(echo "$target_entry" | awk '{print $4}')
+
+    echo ""
+    echo "  Current values:"
+    printf "    Share      : %s\n" "$target_src"
+    printf "    Mount point: %s\n" "$target_mp"
+    printf "    Type       : %s\n" "$target_fs"
+    printf "    Options    : %s\n" "$target_opts"
+    echo ""
+    echo "  Press Enter to keep the current value."
+    echo ""
+
+    # Share path
+    local new_src=""
+    read -r -p "  Share path [$target_src]: " new_src
+    new_src="${new_src:-$target_src}"
+
+    # Mount point
+    local new_mp=""
+    read -r -p "  Mount point [$target_mp]: " new_mp
+    new_mp="${new_mp:-$target_mp}"
+
+    # Options — offer guided or raw edit
+    echo ""
+    echo "  Options — edit raw fstab options string, or press Enter to keep."
+    local new_opts=""
+    read -r -p "  Options [$target_opts]: " new_opts
+    new_opts="${new_opts:-$target_opts}"
+
+    # Credentials update (CIFS only)
+    local creds_file="/etc/samba/credentials.$(echo "$target_src" | sed 's|[^a-zA-Z0-9]|_|g')"
+    if [[ "$target_fs" == "cifs" && -f "$creds_file" ]]; then
+        echo ""
+        local update_creds=""
+        read -r -p "  Update credentials (username/password)? [y/N]: " update_creds
+        if [[ "${update_creds,,}" == "y" ]]; then
+            local smb_user="" smb_pass="" smb_domain=""
+            read -r -p "  Username: " smb_user
+            read -r -s -p "  Password: " smb_pass; echo ""
+            read -r -p "  Domain (leave blank if none): " smb_domain
+            local bk_creds="${creds_file}.backup.$(date +%Y%m%d-%H%M%S)"
+            cp "$creds_file" "$bk_creds"
+            cat > "$creds_file" << CREDS
+username=${smb_user}
+password=${smb_pass}
+${smb_domain:+domain=${smb_domain}}
+CREDS
+            chmod 600 "$creds_file"
+            chown root:root "$creds_file"
+            ok "Credentials updated (old saved to $(basename "$bk_creds"))"
+        fi
+    fi
+
+    # Write changes
+    local bk="/etc/fstab.backup.$(date +%Y%m%d-%H%M%S)"
+    cp /etc/fstab "$bk"
+    info "Backed up /etc/fstab → $bk"
+
+    # Replace the old line with the new one
+    local new_line
+    new_line=$(printf '%-40s %-25s %-6s %s 0 0' "$new_src" "$new_mp" "$target_fs" "$new_opts")
+    # Escape for sed
+    local escaped_old escaped_new
+    escaped_old=$(printf '%s\n' "$target_entry" | sed 's/[[\.*^$()+?{|]/\\&/g')
+    escaped_new=$(printf '%s\n' "$new_line"     | sed 's/[[\.*^$()+?{|]/\\&/g; s|/|\\/|g')
+    sed -i "s|${escaped_old}|${new_line}|" /etc/fstab
+    ok "fstab updated"
+
+    # Remount if mount point changed or options changed
+    if mountpoint -q "$target_mp" 2>/dev/null; then
+        echo ""
+        local remount=""
+        read -r -p "  Remount now to apply changes? [Y/n]: " remount
+        if [[ "${remount,,}" != "n" ]]; then
+            umount "$target_mp" 2>/dev/null || warn "Could not unmount cleanly — may still be in use"
+            [[ "$new_mp" != "$target_mp" ]] && mkdir -p "$new_mp"
+            if mount -t "$target_fs" -o "$new_opts" "$new_src" "$new_mp"; then
+                ok "Remounted at $new_mp"
+            else
+                err "Remount failed — check options and connectivity."
+                info "Manual retry: sudo mount -t $target_fs -o $new_opts $new_src $new_mp"
+            fi
+        fi
+    fi
+}
+
 # ── Remove a mount ────────────────────────────────────────────────────────────
 remove_mount() {
     echo ""
@@ -302,7 +424,8 @@ main() {
         echo "    1) Mount an SMB/CIFS share (Windows, Samba, NAS)"
         echo "    2) Mount an NFS share"
         echo "    3) Show current network mounts"
-        echo "    4) Remove a mount"
+        echo "    4) Edit a mount"
+        echo "    5) Remove a mount"
         echo "    0) Quit"
         echo ""
         read -r -p "  Choice [1]: " action
@@ -313,7 +436,8 @@ main() {
             1) mount_smb ;;
             2) mount_nfs ;;
             3) show_mounts ;;
-            4) remove_mount ;;
+            4) edit_mount ;;
+            5) remove_mount ;;
             0|q|Q) break ;;
             *) warn "Invalid choice." ;;
         esac