linux-live/tools/livekitlib

#!/bin/bash
 
# Functions library :: for Linux Live Kit scripts
# Author: Tomas M. <http://www.linux-live.org>
#
 
# =================================================================
# debug and output functions
# =================================================================
 
# global variable
DEBUG_IS_ENABLED=$(cat /proc/cmdline 2>/dev/null | grep debug)
 
debug_log()
{
if [ "$DEBUG_IS_ENABLED" ]; then
echo "- debug: $*" >&2
log "- debug: $*"
fi
}
 
# header
# $1 = text to show
#
header()
{
echo """$@"""
}
 
 
# echogreen will echo $@ in green color
# $1 = text
#
echogreen()
{
echo -ne """$@"""
}
 
# log - store given text in /var/log/livedbg
log()
{
echo "$@" 2>/dev/null >>/var/log/livedbg
}
 
# show information about the debug shell
show_debug_banner()
{
echo
echo "====="
echo ": Debugging started. Here is the root shell for you."
echo ": Type your desired commands or hit Ctrl+D to continue booting."
echo
}
 
# debug_shell
# executed when debug boot parameter is present
#
debug_shell()
{
if [ "$DEBUG_IS_ENABLED" ]; then
show_debug_banner
bash < /dev/console
echo
fi
}
 
fatal()
{
echolog
header "Fatal error occured - $1"
echolog "Something went wrong and we can't continue. This should never happen."
echolog "Please reboot your computer with Ctrl+Alt+Delete ..."
echolog
bash < /dev/console
}
 
 
# test if the script is started by root user. If not, exit
#
allow_only_root()
{
if [ "0$UID" -ne 0 ]; then
echo "Only root can run $(basename $0)"; exit 1
fi
}
 
# Create bundle
# call mksquashfs with apropriate arguments
# $1 = directory which will be compressed to squashfs bundle
# $2 = output file
# $3..$9 = optional arguments like -keep-as-directory or -b 123456789
#
create_bundle()
{
debug_log "create_module" "$*"
rm -f "$2" # overwrite, never append to existing file
mksquashfs "$1" "$2" -comp xz -b 512K $3 $4 $5 $6 $7 $8 $9>/dev/null
}