/usr/share/tcos/hooks-addons/04debug is in initramfs-tools-tcos 0.89.93ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | # hooks addon DEBUG support
# need strace, lsmod and ldd wrapper
# for debug purposes
if [ ! $TCOS_DEBUG_TOOLS ]; then
_verbose "(04debug) TCOS_DEBUG_TOOLS disabled"
else
stat_before
mkdir -p $DESTDIR/lib/terminfo/l/
mkdir -p $DESTDIR/lib/terminfo/x/
cp -a /lib/terminfo/l/linux $DESTDIR/lib/terminfo/l/
cp -a /lib/terminfo/x/xterm* $DESTDIR/lib/terminfo/x/
[ -e /usr/sbin/iftop ] && cpifexists /usr/sbin/iftop /usr/bin/
cpifexists /bin/lsmod /usr/bin/
[ -e /usr/bin/strace ] && cpifexists /usr/bin/strace /usr/bin/
cpifexists /sbin/mkfs /sbin/
cpifexists /sbin/mkfs.vfat /sbin/
cpifexists /sbin/mke2fs /sbin/
stat_after "Debug tools"
fi # end of TCOS_DEBUG_TOOLS
cat <<EOF > $DESTDIR/bin/ldd
#!/bin/sh
file=\$1
if [ ! -f /\$file ]; then
file=\$(which \$file)
fi
if [ ! -e \${file} ]; then
echo "\${file} not found"
exit 1
fi
`ldd /sbin/mkfs | awk '/ld-linux/{print $1}'` --list \$file
EOF
chmod +x $DESTDIR/bin/ldd
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