Initial commit

1 files changed, 179 insertions, 0 deletions

diff --git a/fstab.sh b/fstab.sh
new file mode 100644
index 0000000..e00dc16
--- /dev/null
+++ b/fstab.sh
@@ -0,0 +1,179 @@
+#!/system/bin/sh
+# fstab.sh
+# Reads an fstab-style config and performs mounts/swapon without touching /etc/fstab.
+# - Messages go to console AND to $LOG_FILE.
+# - Privileged commands (mkdir, mount, swapon) run via: su --mount-master -c "…"
+#
+# Usage: ./fstab.sh path/to/fstab.conf
+# Override log file by exporting LOG_FILE before running.
+
+FSTAB_FILE="$1"
+
+if [ -z "$FSTAB_FILE" ]; then
+    echo "Usage: $0 path/to/fstab.conf"
+    exit 2
+fi
+
+if [ ! -r "$FSTAB_FILE" ]; then
+    echo "File '$FSTAB_FILE' not readable."
+    exit 2
+fi
+
+# Ensure 'su' exists
+if ! command -v su >/dev/null 2>&1; then
+    echo "ERROR: 'su' not found. Cannot perform privileged operations."
+    exit 2
+fi
+
+error_count=0
+line_no=0
+
+# --- logging helpers (both console and file) ---
+log()  { echo "$*" | tee -a "$LOG_FILE"; }
+warn() { echo "WARN: $*" | tee -a "$LOG_FILE"; }
+err()  { echo "ERROR: $*" | tee -a "$LOG_FILE"; error_count=`expr $error_count + 1`; }
+
+# --- safe single-quoting for building a command string for su -c ---
+shell_quote() {
+    # Output a single-quoted representation of $1, handling internal single quotes
+    # 'abc'd' -> 'abc'"'"'d'
+    printf "'%s'" "$(printf "%s" "$1" | sed "s/'/'\"'\"'/g")"
+}
+
+# --- run a command as root via su --mount-master -c "..." preserving args safely ---
+# Usage: run_root CMD ARG1 ARG2 ...
+run_root() {
+    cmd="$1"; shift
+    # Build a single string: CMD 'ARG1' 'ARG2' ...
+    cmdline=$(shell_quote "$cmd")
+    for a in "$@"; do
+        cmdline="$cmdline $(shell_quote "$a")"
+    done
+    log "RUN (as root): $cmd $*"
+    # Execute
+    su $su_options -c "$cmdline"
+    rc=$?
+    [ $rc -ne 0 ] && err "Command failed (exit $rc): $cmd $*"
+    return $rc
+}
+
+# --- check if a mountpoint is already mounted (no root needed) ---
+is_mounted() {
+    mp="$1"
+    if command -v mountpoint >/dev/null 2>&1; then
+        mountpoint -q "$mp"
+        return $?
+    fi
+    grep -qs " $mp " /proc/mounts
+    return $?
+}
+
+# --- check if swap device is already active (no root needed) ---
+is_swap_active() {
+    spec="$1"
+    if command -v swapon >/dev/null 2>&1; then
+        # Prefer swapon --show if available
+        run_root swapon --show=NAME --noheadings 2>/dev/null | grep -Fxq "$spec" && return 0
+        basename_spec=`basename "$spec"`
+        run_root swapon --show=NAME --noheadings 2>/dev/null | awk -F/ '{print $NF}' | grep -Fxq "$basename_spec" && return 0
+        return 1
+    fi
+    grep -qs "^$spec[[:space:]]" /proc/swaps
+    return $?
+}
+
+# --- process each fstab line ---
+while IFS= read -r rawline || [ -n "$rawline" ]; do
+    line_no=`expr $line_no + 1`
+    line=`echo "$rawline" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//'`
+
+    case "$line" in
+        ""|\#*) continue ;;
+    esac
+
+    # spec file vfstype mntops dump pass   (default 0 for last two if missing)
+    set -- `echo "$line" | awk '{print $1, $2, $3, $4, ($5? $5:0), ($6? $6:0)}'`
+    fs_spec=$1
+    fs_file=$2
+    fs_vfstype=$3
+    fs_mntops=$4
+    fs_freq=$5
+    fs_pass=$6
+
+    if [ -z "$fs_spec" ] || [ -z "$fs_file" ] || [ -z "$fs_vfstype" ]; then
+        warn "Line $line_no: Invalid entry, skipped."
+        continue
+    fi
+
+    echo "$fs_mntops" | grep -qw noauto && {
+        log "Line $line_no: 'noauto' found, skipping $fs_spec -> $fs_file."
+        continue
+    }
+
+    # --- swap handling ---
+    if [ "$fs_vfstype" = "swap" ]; then
+        if is_swap_active "$fs_spec"; then
+            log "Line $line_no: Swap '$fs_spec' already active — skipped."
+            continue
+        fi
+        if command -v swapon >/dev/null 2>&1; then
+            log "Line $line_no: Activating swap: $fs_spec"
+            if [ "$fs_mntops" = "-" ]; then
+                run_root swapon "$fs_spec" || true
+            else
+                run_root swapon -o "$fs_mntops" "$fs_spec" || true
+            fi
+        else
+            err "Line $line_no: swapon not available."
+        fi
+        continue
+    fi
+
+    # --- bind / rbind mounts ---
+    echo "$fs_mntops" | grep -q bind && {
+        if is_mounted "$fs_file"; then
+            log "Line $line_no: $fs_file already mounted — skipped."
+            continue
+        fi
+        if [ ! -e "$fs_file" ]; then
+            log "Line $line_no: Creating mountpoint $fs_file"
+            run_root mkdir -p "$fs_file" || { err "Line $line_no: mkdir failed for $fs_file"; continue; }
+        fi
+        if echo "$fs_mntops" | grep -qw rbind; then
+            log "Line $line_no: rbind mount: $fs_spec -> $fs_file"
+            run_root mount --rbind "$fs_spec" "$fs_file" || true
+        else
+            log "Line $line_no: bind mount: $fs_spec -> $fs_file"
+            run_root mount --bind "$fs_spec" "$fs_file" || true
+        fi
+        continue
+    }
+
+    # --- regular filesystem mounts ---
+    if is_mounted "$fs_file"; then
+        log "Line $line_no: $fs_file already mounted — skipped."
+        continue
+    fi
+
+    if [ ! -e "$fs_file" ]; then
+        log "Line $line_no: Creating mountpoint $fs_file"
+        run_root mkdir -p "$fs_file" || { err "Line $line_no: mkdir failed"; continue; }
+    fi
+
+    if [ "$fs_mntops" = "-" ]; then
+        log "Line $line_no: Mounting $fs_spec -> $fs_file (type=$fs_vfstype)"
+        run_root mount -t "$fs_vfstype" "$fs_spec" "$fs_file" || true
+    else
+        log "Line $line_no: Mounting $fs_spec -> $fs_file (type=$fs_vfstype, opts=$fs_mntops)"
+        run_root mount -t "$fs_vfstype" -o "$fs_mntops" "$fs_spec" "$fs_file" || true
+    fi
+done < "$FSTAB_FILE"
+
+if [ $error_count -gt 0 ]; then
+    echo "Done: $error_count errors occurred." | tee -a "$LOG_FILE"
+    exit 1
+else
+    echo "Done: all entries processed successfully." | tee -a "$LOG_FILE"
+    exit 0
+fi
+