# 9. Apply the patch if [ "$PATCH_TYPE" = "twrp_zip" ]; then # -------------------------------------------------------------- # TWRP approach – we reboot into recovery and let TWRP flash it. # -------------------------------------------------------------- log "Rebooting into TWRP to install ZIP …" # Store path in a known location that TWRP can read after reboot. cp "$PATCH_FILE" /cache/recovery/auto_patch.zip
log "Manifest reports patch version: $REMOTE_PATCH_VERSION (type: $PATCH_TYPE)"
# 5. Compare versions if [ "$REMOTE_PATCH_VERSION" -le "$SAVED_PATCH_VERSION" ]; then log "Device already at latest patch level – nothing to do." exit 0 fi
# 3. Pull the manifest log "Downloading manifest from $MANIFEST_URL ..." if command -v curl >/dev/null 2>&1; then MANIFEST_JSON=$(curl -fsSL "$MANIFEST_URL") elif command -v wget >/dev/null 2>&1; then MANIFEST_JSON=$(wget -qO- "$MANIFEST_URL") else log "Neither curl nor wget is present – cannot continue." exit 1 fi a127f u7 auto patch
It assumes you have root access (or a custom recovery such as TWRP) and that you are comfortable running a small shell script at boot. – Flashing or patching firmware can brick the device if something goes wrong. • Always keep a full backup (TWRP backup, Odin‑saved stock firmware, or a complete “nandroid” image). • Test the script on a spare device first. • Make sure the patch you are applying is exactly for the A127F U7 build (same region, carrier, and base‑band version). 1. High‑level flow | Step | What the script does | Why it matters | |------|----------------------|----------------| | A. Detect current build | Reads ro.build.display.id (or /system/build.prop ) to know the exact firmware version you’re on. | Prevents re‑applying an already‑installed patch. | | B. Query a remote “patch‑manifest” | HTTPS GET to a small JSON file you host (e.g., https://my‑patch‑server.com/a127f_u7/manifest.json ). | Central place to announce new patches, version numbers, and download URLs. | | C. Compare versions | If the manifest reports a newer patch_version than the one stored locally, the script proceeds. | Guarantees you only download when needed. | | D. Download the patch | Uses curl / wget to fetch a signed ZIP (or a fastboot‑compatible tar). | The patch file contains only the delta (difference) files, not a full ROM. | | E. Verify integrity | Checks the SHA‑256 hash (provided in the manifest) and optionally GPG‑signatures. | Prevents corrupted or malicious payloads. | | F. Apply the patch | • If it’s a TWRP‑flashable ZIP , the script calls twrp install . • If it’s a fastboot image, the script reboots to fastboot and runs fastboot flash … . | Handles the two most common Android flashing paths. | | G. Record success | Writes the new patch_version to /data/local/tmp/auto_patch_state.json (or another persistent location). | Guarantees the next run knows it’s up‑to‑date. | | H. Reboot | A clean reboot after flashing ensures the new binaries are loaded. | Prevents “partial‑flash” glitches. | 2. Minimal working example (Bash) Below is a complete, self‑contained script you can drop into /system/bin/auto‑patch.sh (or any location on the /data partition if you prefer). Make it executable ( chmod +755 ) and add it to /etc/init.d/99auto‑patch (or the equivalent init‑rc file for your Android version) so it runs on every boot.
log() echo "[$LOG_TAG] $*"
# Cleanup rm -rf "$TMP_DIR"
# 8. Verify SHA‑256 log "Verifying integrity …" CALC_SHA=$(sha256sum "$PATCH_FILE" | awk 'print $1') if [ "$CALC_SHA" != "$PATCH_SHA256" ]; then log "Checksum mismatch! Expected $PATCH_SHA256, got $CALC_SHA" rm -rf "$TMP_DIR" exit 1 fi log "Checksum OK."
log "New patch detected! Preparing to download…"
# ---------- CONFIGURATION ---------- PATCH_SERVER="https://my-patch-server.com/a127f_u7" MANIFEST_URL="$PATCH_SERVER/manifest.json" STATE_FILE="/data/local/tmp/auto_patch_state.json" TMP_DIR="/data/local/tmp/auto_patch_tmp" LOG_TAG="AutoPatch" cp "$PATCH_FILE" /cache/recovery/auto_patch
"patch_version": $REMOTE_PATCH_VERSION, "applied_at": "$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
# 6. Create temp folder mkdir -p "$TMP_DIR" PATCH_FILE="$TMP_DIR/patch_$REMOTE_PATCH_VERSION.zip"
# 2. Load saved state (if any) if [ -f "$STATE_FILE" ]; then SAVED_PATCH_VERSION=$(jq -r .patch_version "$STATE_FILE") else SAVED_PATCH_VERSION="0" fi log "Last applied patch version: $SAVED_PATCH_VERSION" – Flashing or patching firmware can brick the
