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在 shellcheck 中运行它,我得到:
line 20 while [ -1 ]; do
In TimerInTerminal.sh line 20:
while [ -1 ]; do
^-- SC2078: This expression is constant. Did you forget a $ somewhere?
line 36 for i in `seq 1 180`; # for i = 1:180 (i.e. 180 seconds)
In TimerInTerminal.sh line 36:
for i in `seq 1 180`; # for i = 1:180 (i.e. 180 seconds)
^-- SC2034: i appears unused. Verify it or export it.
^-- SC2006: Use $(..) instead of legacy `..`.
#!/bin/sh -x
# script to create timer in terminal
# Jason Atwood
# 2013/6/22
# displays negative numbers ?
# 31: [: 0: unexpected operator
# Start up
echo "starting timer script ..."
sleep 1 # seconds
# Get input from user
read -r "Timer for how many minutes?" DURATION
DURATION=$(( DURATION*60 )) # convert minutes to seconds
# Get start time
START=$(date +%s)
# Infinite loop
while [ -1 ]; do
clear # Clear window
# Do math
NOW=$(date +%s) # Get time now in seconds
DIF=$(( NOW-START )) # Compute diff in seconds
ELAPSE=$(( DURATION-DIF )) # Compute elapsed time in seconds
MINS=$(( ELAPSE/60 )) # Convert to minutes... (dumps remainder from division)
SECS=$(( ELAPSE - (MINS*60) )) # ... and seconds
# Conditional
# unexpected operator
#if [ $MINS == 0 ] # if mins = 0 and secs = 0 (i.e. if time expired)
#if [ $MINS -eq 0 ]
if [ $MINS -le 0 ]
then # Blink screen
for i in `seq 1 180`; # for i = 1:180 (i.e. 180 seconds)
do
clear # Flash on
setterm -term linux -back red -fore white # use setterm to change background color
echo "00:00 " # extra tabs for visibility
sleep 0.5
clear # Flash off
setterm -term linux -default # Clear setterm changes from above
echo "00:00" # (I.e. go back to white text on black background)
sleep 0.5
done # End for loop
break # End script
else # Else, time is not expired
echo "$MINS:$SECS" # Display time
sleep 1 # Sleep 1 second
fi # End if
done # End while loop
答案1
#!/bin/sh
# TimerInTerminal.sh
# had to install banner sudo apt install sysvbanner
# script to create timer in terminal
# MadeInGermany
soundfile="/usr/share/sounds/My_Sounds/Electronic_Chime.wav"
if [ $# -eq 1 ]
then
DURATION="$1"
else
read -p "Timer for how many minutes?( for fractional use decimal notation , 0.5==30s, 1.25==75s etc) : " DURATION
fi
DURATION=$(echo "$DURATION * 60 / 1" | bc) # lets us deal with fractional inputs
START=$(date +%s) # only do this once (anchor's the time)
countdown () {
NOW=$(date +%s) # Get time now in seconds
DIF=$((NOW - START)) # Compute diff in seconds
ELAPSE=$((DURATION - DIF)) # Compute elapsed time in seconds
MINS=$((ELAPSE / 60)) # Convert to minutes... (dumps remainder from division)
SECS=$((ELAPSE - (MINS*60))) # ... and seconds
banner "$MINS:$SECS"
sleep $1
}
while true
do
clear
countdown 0 # calc time remaining
if [ $MINS -le 0 ]
then
# Blink screen
while [ $SECS -gt 0 ]
do
clear # Flash on
setterm -term linux -back red -fore white
countdown 0.5
clear # Flash off
setterm -term linux -default
countdown 0.5
done # End for loop
setterm -term linux -default
clear
break # time has expired lets get out of here
else
countdown 1
fi
done
echo; banner "Time is up."; echo ;
cvlc --play-and-exit "$soundfile" > /dev/null 2>&1