Initial commit from Ventoy@7cbdc5c

2026-08-23 00:38:40 -04:00
commit e9a7a16826
2848 changed files with 439164 additions and 0 deletions
@@ -0,0 +1,140 @@
+#!/bin/bash
+
+size=1024
+fstype=ext4
+label=casper-rw
+config=''
+outputfile=persistence.dat
+
+print_usage() {
+    echo 'Usage:  sudo ./CreatePersistentImg.sh [ -s size ] [ -t fstype ] [ -l LABEL ] [ -c CFG ] [ -e ]'
+    echo '  OPTION: (optional)'
+    echo '   -s size in MB, default is 1024'
+    echo '   -t filesystem type, default is ext4  ext2/ext3/ext4/xfs are supported now'
+    echo '   -l label, default is casper-rw'
+    echo '   -c configfile name inside the persistence file. File content is "/ union"'
+    echo '   -o outputfile name, default is persistence.dat'
+    echo '   -e enable encryption, disabled by default (only few distros support this)'    
+    echo ''
+}
+
+print_err() {
+    echo ""
+    echo "$*"
+    echo ""
+}
+
+uid=$(id -u)
+if [ $uid -ne 0 ]; then
+    print_err "Please use sudo or run the script as root."
+    exit 1
+fi
+
+while [ -n "$1" ]; do
+    if [ "$1" = "-s" ]; then
+        shift
+        size=$1
+    elif [ "$1" = "-t" ]; then
+        shift
+        fstype=$1
+    elif [ "$1" = "-l" ]; then
+        shift
+        label=$1
+    elif [ "$1" = "-c" ]; then
+        shift
+        config=$1
+    elif [ "$1" = "-o" ]; then
+        shift
+        outputfile=$1
+    elif [ "$1" = "-e" ]; then
+        read -s -p "Encryption passphrase: " passphrase
+        echo
+    elif [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+        print_usage
+        exit 0
+    else
+        print_usage
+        exit 1
+    fi
+    shift
+done
+
+
+# check label
+if [ -z "$label" ]; then
+    echo "The label can NOT be empty."
+    exit 1
+fi
+
+# check size
+if echo $size | grep -q "^[0-9][0-9]*$"; then
+    vtMinSize=1
+    if echo $fstype | grep -q '^xfs$'; then
+        vtMinSize=16
+    fi
+    
+    if [ $size -lt $vtMinSize ]; then
+        echo "size too small ($size)"
+        exit 1
+    fi    
+else
+    echo "Invalid size $size"
+    exit 1
+fi
+
+
+# check file system type
+# nodiscard must be set for ext2/3/4
+# -K must be set for xfs 
+if echo $fstype | grep -q '^ext[234]$'; then
+    fsopt='-E nodiscard'
+elif [ "$fstype" = "xfs" ]; then
+    fsopt='-K'
+else
+    echo "unsupported file system $fstype"
+    exit 1
+fi
+
+if [ "$outputdir" != "persistence.dat" ]; then
+    mkdir -p "$(dirname "$outputfile")"
+fi
+
+# 00->ff avoid sparse file
+dd if=/dev/zero  bs=1M count=$size | tr '\000' '\377' > "$outputfile"
+sync
+
+freeloop=$(losetup -f)
+
+losetup $freeloop "$outputfile"
+
+if [ ! -z "$passphrase" ]; then
+    printf "$passphrase" | cryptsetup -q --verbose luksFormat $freeloop -
+    printf "$passphrase" | cryptsetup -q --verbose luksOpen $freeloop persist_decrypted -
+    _freeloop=$freeloop
+    freeloop="/dev/mapper/persist_decrypted"
+fi
+
+mkfs -t $fstype $fsopt -L $label $freeloop 
+
+sync
+
+if [ -n "$config" ]; then
+    if [ -d ./persist_tmp_mnt ]; then
+        rm -rf ./persist_tmp_mnt
+    fi
+    
+    mkdir ./persist_tmp_mnt
+    if mount $freeloop ./persist_tmp_mnt; then
+        echo '/ union' > ./persist_tmp_mnt/$config
+        sync
+        umount ./persist_tmp_mnt
+    fi
+    rm -rf ./persist_tmp_mnt
+fi
+
+if [ ! -z "$passphrase" ]; then
+    cryptsetup luksClose $freeloop
+    freeloop=$_freeloop
+fi
+
+losetup -d $freeloop