#!/bin/sh
#
# This file was deployed via grml-live's
# ${GRML_FAI_CONFIG}/config/scripts/GRMLBASE/42-branding script, using
# ${GRML_FAI_CONFIG}/config/files/usr/share/initramfs-tools/scripts/init-top/grml/GRMLBASE
#
# Filename:      /usr/share/initramfs-tools/scripts/init-top/grml
# Purpose:       Early boot progress handler
# Authors:       grml-team (grml.org),
#                (c) Michael Prokop <mika@grml.org>
# Bug-Reports:   see http://grml.org/bugs/
# License:       This file is licensed under the GPL v2 or any later version.
################################################################################

# prereq header {{{
# without this header booting will fail with:
# "PANIC: Circular dependancy.  Exiting."
PREREQ=""
prereqs()
{
        echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
        prereqs
        exit 0
        ;;
esac
# }}}

# helper functions {{{

if grep -qe debug -qe verbose /proc/cmdline 2>/dev/null ; then
   echo "debug: scripts/init-top/grml running">/dev/console
fi

# get boot command line
CMDLINE="$(cat /proc/cmdline)"

# Simple shell grep
stringinfile(){
  case "$(cat $2)" in *$1*) return 0;; esac
  return 1
}

# same for strings
stringinstring(){
  case "$2" in *$1*) return 0;; esac
  return 1
}

# Reread boot command line; echo last parameter's argument or return false.
getbootparam(){
  stringinstring " $1=" "$CMDLINE" || return 1
  result="${CMDLINE##*$1=}"
  result="${result%%[   ]*}"
  echo "$result"
  return 0
}

# Check boot commandline for specified option
checkbootparam(){
  stringinstring " $1" "$CMDLINE"
  return "$?"
}

if checkbootparam "nocolor" ; then
  echo "Disabling colors in bootsequence as requested on commandline."
  # Reset fb color mode
  RESET="]R"
  # ANSI COLORS
  # Erase to end of line
  CRE="
"
  # Clear and reset Screen
  CLEAR="c"
else
  # Reset fb color mode
  RESET="]R"
  # ANSI COLORS
  # Erase to end of line
  CRE="
"
  # Clear and reset Screen
  CLEAR="c"
  # Normal color
  NORMAL=""
  # RED: Failure or error message
  RED=""
  # GREEN: Success message
  GREEN=""
  # YELLOW: Descriptions
  YELLOW=""
  # BLUE: System mesages
  BLUE=""
  # MAGENTA: Found devices or drivers
  MAGENTA=""
  # CYAN: Questions
  CYAN=""
  # BOLD WHITE: Hint
  WHITE=""
fi

log_grml_failure_msg () {
  echo -n " ${RED}*${NORMAL} $@"
}

# int log_grml_begin_message (char *message)
log_grml_begin_msg () {
  echo -n " ${GREEN}*${NORMAL} $@"
}

log_grml_warn_msg () {
  echo -n " ${YELLOW}*${NORMAL} $@"
}

# int log_grml_end_message (int exitstatus)
SUCCESS=" ${BLUE}[ ${GREEN}ok ${BLUE}]${NORMAL}"
FAILED=" ${NORMAL}[${RED}fail${NORMAL}]"

# }}}

# welcome splash {{{

DISTRI="$(getbootparam 'distri' 2>/dev/null)"

if [ -r /etc/grml_version ] ; then
   GRML_VERSION="$(cat /etc/grml_version)"
fi

if checkbootparam "quiet" ; then
    echo -e "${CLEAR}"
fi

if [ -n "$DISTRI" ] ; then
SPLASH="
${RED} $DISTRI

${WHITE}based on grml.org.

${NORMAL}"
else
SPLASH="
${YELLOW}   ____              _
${YELLOW}  / ___| _ __ _____ | |
${YELLOW} | |  _ | / /|     || |
${YELLOW} | |_| ||  / | | | || |
${YELLOW}  \____||_|  |_|_|_||_|

${WHITE}Grml Live Linux - http://grml.org/${NORMAL}"
fi

echo ""
echo "${WHITE}Welcome to"
echo "$SPLASH"
echo

if [ -n "$GRML_VERSION" ] ; then
   log_grml_begin_msg "Running $GRML_VERSION"
   echo
fi

# }}}

## /proc/cmdline handling {{{
# No kernel messages while probing modules:
if ! grep -qe debug -qe verbose /proc/cmdline 2>/dev/null ; then
   [ -r /proc/sys/kernel/printk ] && echo "0" > /proc/sys/kernel/printk
fi

# Make sure we support squashfs:
if ! grep -q squashfs /proc/filesystems ; then
   modprobe -q squashfs || log_grml_failure_msg "Warning: looks like you do not have support for squashfs"
fi

if grep -q 'boot=live' /proc/cmdline 2>/dev/null ; then
   log_grml_begin_msg "Finished early booting sequence." ; echo "$SUCCESS"
   log_grml_begin_msg "Searching for GRML file, this might take a few seconds..."
   echo
fi
## }}}

# vim: foldmethod=marker expandtab ai ft=sh