38 lines
1.8 KiB
Bash
38 lines
1.8 KiB
Bash
|
#!/usr/bin/env bash
|
||
|
|
# Deep health scan of the ESP linux-rootfs.img X11 payload:
|
||
|
|
# resolves symlinks, reports ELF validity, .text size and dynamic symbols so a
|
||
|
|
# "smashed header" library (right size, truncated .text) is obvious.
|
||
|
|
set -uo pipefail
|
||
|
|
img="${1:-/mnt/d/Code/DEAICUP/Deshab/ISO/deshab-dev.img}"
|
||
|
|
dir="${2:-/usr/local/lib/xorg-libs}"
|
||
|
|
L=$(losetup --find --show --partscan "$img"); sleep 0.3
|
||
|
|
M=$(mktemp -d); mount "${L}p1" "$M" || { echo "ESP mount failed"; exit 1; }
|
||
|
|
R=$(mktemp -d); mount -o loop,ro "$M/boot/linux-rootfs.img" "$R" || { echo "rootfs mount failed"; exit 1; }
|
||
|
|
D="$R$dir"
|
||
|
|
echo "=== $img : $dir ($(ls "$D" 2>/dev/null | wc -l) entries)"
|
||
|
|
printf '%-34s %-9s %9s %9s %7s %s\n' NAME KIND SIZE TEXT SYMS NOTE
|
||
|
|
while IFS= read -r f; do
|
||
|
|
name=$(basename "$f")
|
||
|
|
if [[ -L "$f" ]]; then
|
||
|
|
tgt=$(readlink -f "$f" 2>/dev/null || true)
|
||
|
|
if [[ -z "$tgt" || ! -e "$tgt" ]]; then
|
||
|
|
printf '%-34s %-9s %9s %9s %7s %s\n' "$name" SYMLINK - - - "DANGLING -> $(readlink "$f")"
|
||
|
|
continue
|
||
|
|
fi
|
||
|
|
f="$tgt"
|
||
|
|
fi
|
||
|
|
magic=$(head -c4 "$f" 2>/dev/null | tr -d '\0')
|
||
|
|
if [[ "$magic" != $'\x7fELF' ]]; then
|
||
|
|
printf '%-34s %-9s %9s %9s %7s %s\n' "$name" NOT-ELF "$(stat -c %s "$f")" - - "$(file -b "$f" | cut -c1-30)"
|
||
|
|
continue
|
||
|
|
fi
|
||
|
|
sz=$(stat -c %s "$f")
|
||
|
|
text=$(readelf -SW "$f" 2>/dev/null | awk '$2==".text"{print strtonum("0x"$6)}')
|
||
|
|
syms=$(readelf -sW --dyn-syms "$f" 2>/dev/null | grep -c 'FUNC')
|
||
|
|
note=""
|
||
|
|
[[ -z "$text" ]] && { note="NO-.text"; text=0; }
|
||
|
|
[[ "$text" -lt 4096 && "$sz" -gt 20000 ]] && note="${note} SMALL-TEXT"
|
||
|
|
[[ "$syms" -lt 5 ]] && note="${note} FEW-SYMS"
|
||
|
|
printf '%-34s %-9s %9s %9s %7s %s\n' "$name" ELF "$sz" "$text" "$syms" "$note"
|
||
|
|
done < <(find "$D" -maxdepth 1 \( -type f -o -type l \) | sort)
|
||
|
|
umount "$R"; rmdir "$R"; umount "$M"; losetup -d "$L"; rmdir "$M"
|