119 lines
2.4 KiB
Bash
119 lines
2.4 KiB
Bash
#!/bin/bash
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# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
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# Released under the terms of the GNU GPL
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#
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# Generate a newline separated list of entries from the file/directory pointed
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# out by the environment variable: CONFIG_INITRAMFS_SOURCE
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#
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# If CONFIG_INITRAMFS_SOURCE is non-existing then generate a small dummy file.
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#
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# The output is suitable for gen_init_cpio as found in usr/Makefile.
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#
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# TODO: Add support for symlinks, sockets and pipes when gen_init_cpio
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# supports them.
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simple_initramfs() {
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cat <<-EOF
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# This is a very simple initramfs
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dir /dev 0755 0 0
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nod /dev/console 0600 0 0 c 5 1
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dir /root 0700 0 0
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EOF
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}
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filetype() {
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local argv1="$1"
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if [ -f "${argv1}" ]; then
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echo "file"
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elif [ -d "${argv1}" ]; then
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echo "dir"
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elif [ -b "${argv1}" -o -c "${argv1}" ]; then
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echo "nod"
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else
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echo "invalid"
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fi
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return 0
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}
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print_mtime() {
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local argv1="$1"
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local my_mtime="0"
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if [ -e "${argv1}" ]; then
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my_mtime=$(find "${argv1}" -printf "%T@\n" | sort -r | head -n 1)
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fi
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echo "# Last modified: ${my_mtime}"
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echo
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}
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parse() {
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local location="$1"
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local name="${location/${srcdir}//}"
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local mode="$2"
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local uid="$3"
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local gid="$4"
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local ftype=$(filetype "${location}")
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local str="${mode} ${uid} ${gid}"
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[ "${ftype}" == "invalid" ] && return 0
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[ "${location}" == "${srcdir}" ] && return 0
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case "${ftype}" in
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"file")
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str="${ftype} ${name} ${location} ${str}"
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;;
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"nod")
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local dev_type=
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local maj=$(LC_ALL=C ls -l "${location}" | \
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gawk '{sub(/,/, "", $5); print $5}')
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local min=$(LC_ALL=C ls -l "${location}" | \
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gawk '{print $6}')
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if [ -b "${location}" ]; then
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dev_type="b"
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else
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dev_type="c"
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fi
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str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
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;;
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*)
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str="${ftype} ${name} ${str}"
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;;
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esac
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echo "${str}"
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return 0
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}
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if [ -z "$1" ]; then
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simple_initramfs
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elif [ -f "$1" ]; then
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print_mtime "$1"
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cat "$1"
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elif [ -d "$1" ]; then
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srcdir=$(echo "$1" | sed -e 's://*:/:g')
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dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
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# If $dirlist is only one line, then the directory is empty
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if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
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print_mtime "$1"
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echo "${dirlist}" | \
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while read x; do
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parse ${x}
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done
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else
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# Failsafe in case directory is empty
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simple_initramfs
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fi
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else
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echo " $0: Cannot open '$1' (CONFIG_INITRAMFS_SOURCE)" >&2
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exit 1
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fi
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exit 0
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