Where is the 2 minutes setting in the knoppix-halt file? - bash

Question

According to the knoppix-halt file, it mention that
Please remove CD, close cdrom drive and hit return [2 minutes]
I look through the file so many times but still could not find the 2 minutes setting. I know that sleep X will sleep for X seconds while usleep X will sleep for microsecond. So, I went to look for sleep 120 and usleep 120000000 but did not find any.
So, can someone enlighten me why the message say 2 minutes but I could not find inside the script file?
#!/bin/busybox sh
# This script does:
# - Kill all processes
# - umount/sync filesystems (and freeing loopback files)
# - Eventually eject CD-Rom (autoeject turned on)
PATH=/sbin:/bin:/usr/bin:/usr/sbin:/usr/local/sbin:/usr/local/bin
export PATH
cd /
NORMAL="\033[0;39m"
RED="\033[1;31m"
GREEN="\033[1;32m"
YELLOW="\033[1;33m"
BLUE="\033[1;34m"
MAGENTA="\033[1;35m"
CYAN="\033[1;36m"
WHITE="\033[1;37m"
GRAY="\033[1;38m"
[ -r /etc/default/locale ] && . /etc/default/locale
[ -r /etc/sysconfig/i18n ] && . /etc/sysconfig/i18n
case "$LANG" in
de*)
EJECTMSG="Bitte CD entfernen, Laufwerk schließen und Eingabetaste drücken [2 Minuten]"
COMPLETEMSG="Shutdown beendet."
;;
*)
EJECTMSG="Please remove CD, close cdrom drive and hit return [2 minutes]."
COMPLETEMSG="Shutdown complete."
;;
esac
# Read in boot parameters
read CMDLINE </proc/cmdline 2>/dev/null
echo 0 >/proc/sys/kernel/printk
PROGRESSBAR="/tmp/knoppix-halt.progress"
progress(){
local black="\033[0;0m \033[0m"
local p
local count=0
echo -n -e "\033[1mSystem Shutdown... \033[42;32m \033[0m"
type usleep >/dev/null 2>&1 && sleep="usleep 100000" || sleep="sleep 1"
[ -r "$PROGRESSBAR" ] && rm -f "$PROGRESSBAR" 2>/dev/null
touch "$PROGRESSBAR"
while [ -r "$PROGRESSBAR" ]; do
if [ "$count" -ge 55 ]; then
for p in "/" "-" "\\" "|"; do
echo -n -e "\b${p}"
$sleep
[ -r "$PROGRESSBAR" ] || break
done
else
echo -n -e "\b$black\b"
$sleep
fi
let count++
done
echo -e "\r\033[J\033[1m${COMPLETEMSG}\033[0m"
}
# Return 0 if there is active swap, but
# enough memory available to call swapoff, 1 otherwise.
checkswap(){
local free=0 buffers=0 cache=0 swaptotal=0 swapfree=0 info amount kb
while read info amount kb; do
case "$info" in
MemFree:) free="$amount";;
Buffers:) buffers="$amount";;
Cached:) cached="$amount";;
SwapTotal:) swaptotal="$amount";;
SwapFree:) swapfree="$amount";;
esac
done </proc/meminfo
avail="$((free + buffers + cached))"
swapused="$((swaptotal - swapfree))"
if [ "$swaptotal" -gt 0 -a "$avail" -gt "$swapused" ] >/dev/null 2>&1; then
return 0
else
return 1
fi
}
OMIT=""
for i in $(pidof ntfs-3g aufs aufsd fuse fuseblk cloop0 cloop1 cloop2 cloop3 cloop4 cloop5 cloop6 cloop7 klogd syslogd); do OMIT="$OMIT -o $i"; done 2>/dev/null
killall5 -15 $OMIT; sleep 2
case "$CMDLINE" in *nosound*|*noaudio*|*nostartsound*) true ;; *)
# Play sound if soundcard is alive and soundfile present
# (also giving running programs some more time to terminate)
[ -r /usr/share/sounds/shutdown.ogg -a -f /proc/asound/pcm ] && \
type -p ogg123 >/dev/null 2>&1 && \
{ ogg123 -q --audio-buffers 4096 /usr/share/sounds/shutdown.ogg 2>/dev/null & sleep 2; }
;;
esac
# Clean console i/o
exec >/dev/console 2>&1 </dev/console
stty sane
echo -n -e "\r\033[K"
# echo -e "\033[H\033[J"
# Start progress bar
[ -n "$DEBUG" ] || progress &
# Check which device is mounted as /mnt-system
system="$(awk '/ \/mnt-system /{print $1;exit 0}' /proc/mounts 2>/dev/null)"
# noprompt or noeject option?
NOPROMPT="yes"; NOEJECT="yes"
case "$CMDLINE" in
*noprompt*) ;;
*) # Check if we need to wait for /mnt-system to be ejected.
if [ -n "$system" ]; then
for cdrom in $(awk '/drive name:/{print $NF}' /proc/sys/dev/cdrom*/info 2>/dev/null); do
[ "$system" = "/dev/$cdrom" ] && { NOEJECT=""; NOPROMPT=""; break; }
done
fi
;;
esac
case "$CMDLINE" in *noeject*) NOEJECT="yes" ;; esac
DEBUG=""
case "$CMDLINE" in *\ debug\ *|*BOOT_IMAGE=debug*) DEBUG="yes" ;; esac
# turn off swap, then unmount file systems.
# should free ramdisk space first, check
if checkswap; then
swapoff -a >/dev/null 2>&1
fi
# Shut down network, if no nfs mounted
# Actually... Not needed.
# grep -q ' nfs' /proc/mounts || ifdown -a >/dev/null 2>&1
# Kill remaining processes
killall5 -9 $OMIT
# Turn on autoeject of CD-Roms
if [ -z "$NOEJECT" ]; then
for dev in /proc/sys/dev/cdrom*/lock; do [ -f "$dev" ] && echo 0 > "$dev"; done
for dev in /proc/sys/dev/cdrom*/autoeject; do [ -f "$dev" ] && echo 1 > "$dev"; done
fi
# Try to sync for 30 seconds max.
sync &
SYNCPID="$!"
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
sleep 2
[ -d /proc/"$SYNCPID" ] || break
done
# Free modules
# Do we need to unload modules at all?
#
#while read module relax; do
# case "$module" in
# *eeepc*|*_laptop*) true ;; # Unloading eeepc_laptop disables WLAN in the BIOS. Why?
# *) rmmod "$module" ;;
# esac
#done </proc/modules >/dev/null 2>&1
# Remove all automatically added entries from /etc/fstab
sed -i -e "/^# Added by KNOPPIX/{N;d}" /etc/fstab
# Force sync, then umount.
tac /proc/mounts | while read d m f relax; do
[ -d "$d" ] || continue
case "$f" in tmpfs|proc|sysfs|devpts|usbfs|aufs) ;; *)
case "$f" in rootfs|nfs*) ;; *) blockdev --flushbufs "$d" 2>/dev/null; umount -l "$m" 2>/dev/null ;; esac
case "$d" in /dev/mapper/*) /sbin/dmsetup --force remove "$d" 2>/dev/null ;; esac
;;
esac
done
# We have to use /bin/umount here, since busybox umount does not accept -t no*
# /bin/umount -t notmpfs,noproc,nosysfs,nousbfs,norootfs,noaufs,nonfs -adrf 2>/dev/null
# Free loopback devices which may have been used but not mounted.
for i in /dev/loop* /dev/loop/*; do [ -b "$i" ] && losetup -d "$i" 2>/dev/null; done
# End progress bar
[ -f "$PROGRESSBAR" ] && { rm -f "$PROGRESSBAR" 2>/dev/null; sleep 1; }
sleep 1
echo ""
# Mount boot medium read-only
umount -r /mnt-system 2>/dev/null
# And finally, umount
umount -l /mnt-system 2>/dev/null
# (Harddisk-installation only): mount / read-only
umount -r / 2>/dev/null
# Enable sysrq feature (just in case someone has turned it off)
# echo -n -e '\033[s\033[8m' # No output, save cursor position
echo 1 > /proc/sys/kernel/sysrq
echo s > /proc/sysrq-trigger 2>/dev/null & # emergency sync
sleep 1
echo u > /proc/sysrq-trigger 2>/dev/null & # emergency remount-ro
sleep 1
# echo -n -e '\033[28m\033[u' # re-enable output, restore cursor position
# pre-load poweroff+halt+eject if not included in this shell
poweroff --help >/dev/null 2>&1
reboot --help >/dev/null 2>&1
eject --help >/dev/null 2>&1
if [ -z "$NOEJECT" ]; then
( eject -s $system >/dev/null 2>&1 || eject $system >/dev/null 2>&1 & )
if [ -z "$NOPROMPT" ]; then
echo -n -e "${CYAN}${EJECTMSG}${NORMAL} "
read -t 120 a
fi
fi
case "$0" in
*halt|*poweroff) { poweroff -f 2>/dev/null & sleep 8; } || echo o > /proc/sysrq-trigger 2>/dev/null ;;
*) { reboot -f 2>/dev/null & sleep 8; } || echo b > /proc/sysrq-trigger 2>/dev/null ;;
esac
# Should never be reached.
sleep 2
echo -n -e "\033[1mYou can now turn off your computer.\033[0m"
halt -f
sleep 1337

Answer 1

At the bottom it says:
echo -n -e "${CYAN}${EJECTMSG}${NORMAL} "
read -t 120 a
This writes the message, and then waits up to 120 seconds for you to press return.