有没有办法在终端上显示倒计时或秒表计时器？

#1 楼

while true; do echo -ne "`date`\r"; done

while true; do echo -ne "`date +%H:%M:%S:%N`\r"; done

date1=`date +%s`; while true; do 
   echo -ne "$(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)\r";
done

seconds=20; date1=$((`date +%s` + $seconds)); 
while [ "$date1" -ge `date +%s` ]; do 
  echo -ne "$(date -u --date @$(($date1 - `date +%s` )) +%H:%M:%S)\r"; 
done

function countdown(){
   date1=$((`date +%s` + )); 
   while [ "$date1" -ge `date +%s` ]; do 
     echo -ne "$(date -u --date @$(($date1 - `date +%s`)) +%H:%M:%S)\r";
     sleep 0.1
   done
}
function stopwatch(){
  date1=`date +%s`; 
   while true; do 
    echo -ne "$(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)\r"; 
    sleep 0.1
   done
}

countdown 60

countdown $((2*60*60))

countdown $((24*60*60))

stopwatch

countdown(){
    date1=$((`date +%s` + ));
    while [ "$date1" -ge `date +%s` ]; do 
    ## Is this more than 24h away?
    days=$(($(($(( $date1 - $(date +%s))) * 1 ))/86400))
    echo -ne "$days day(s) and $(date -u --date @$(($date1 - `date +%s`)) +%H:%M:%S)\r"; 
    sleep 0.1
    done
}
stopwatch(){
    date1=`date +%s`; 
    while true; do 
    days=$(( $(($(date +%s) - date1)) / 86400 ))
    echo -ne "$days day(s) and $(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)\r";
    sleep 0.1
    done
}

#2 楼

time cat

ctrl+c

time read

#3 楼

sudo pip install termdown
termdown 10

#4 楼

man leave

leave +0015
Alarm set for Thu Nov  3 14:19:31 CDT 2016. (pid 94317)

#5 楼

countdown()
(
  IFS=:
  set -- $*
  secs=$(( ${1#0} * 3600 + ${2#0} * 60 + ${3#0} ))
  while [ $secs -gt 0 ]
  do
    sleep 1 &
    printf "\r%02d:%02d:%02d" $((secs/3600)) $(( (secs/60)%60)) $((secs%60))
    secs=$(( $secs - 1 ))
    wait
  done
  echo
)

 countdown "00:07:55"

#6 楼

for i in `seq 60 -1 1` ; do echo -ne "\r$i " ; sleep 1 ; done

#7 楼

 #!/usr/bin/awk -f
function z() {
  getline < "/proc/uptime"
  close("/proc/uptime")
  return q4312079q
}
BEGIN {
  x = z()
  while (1) {
    y = z()
    printf "%02d:%05.2f\r", (y - x) / 60, (y - x) % 60
  }
}
 

#8 楼

countdown=60 now=$(date +%s) watch -tpn1 echo '$((now-$(date +%s)+countdown))'

countdown=60 now=$(date +%s) watch -tn1 echo '$((now-$(date +%s)+countdown))'
#no p option on mac for watch

#9 楼

 #!/bin/sh
if [ $# -eq 0 ]; then
    TIMESTAMP=$(sleepenh 0)
    before=$(date +%s)
    while true; do
        diff=$(($(date +%s) - before))
        printf "%02d:%02d:%02d\r" $((diff/3600)) $(((diff%3600)/60)) $((diff%60))
        TIMESTAMP=$(sleepenh $TIMESTAMP 1.0);
    done
    exit 1 # this should never be reached
fi
echo "counting up to $@"
"sleep" &
counterpid=$!
trap "exit" INT TERM
trap "kill 0" EXIT
sleep "$@"
kill $counterpid
 

$ time countdown 2m 4.6s
countdown 2m 4.6s  0.00s user 0.00s system 0% cpu 2:04.60 total

#10 楼

{ ~ }  » time_minutes 15
Counting to 15 minutes
Start at 11:55:34     Will finish at 12:10:34
     Since start: 00:00:08     Till end:  00:14:51

{ ~ }  » time_hours 8
Counting to 8 hours
Start at 11:59:35   Will finish at 19:59:35
     Since start: 00:32:41     Till end:  07:27:19

{ ~ }  » time_flexible 3:23:00
Counting to 3:23:00 hours
Start at 12:35:11   Will finish at 15:58:11
     Since start: 00:00:14     Till end:  03:22:46

function time_func()
{
   date2=$((`date +%s` + ));
   date1=`date +%s`;
   date_finish="$(date --date @$(($date2)) +%T )"

   echo "Start at `date +%T`   Will finish at $date_finish"

    while [ "$date2" -ne `date +%s` ]; do
     echo -ne "     Since start: $(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)     Till end:  $(date -u --date @$(($date2 - `date +%s`)) +%H:%M:%S)\r";
     sleep 1
    done

    printf "\nTimer finished!\n"
    play_sound ~/finished.wav
}

function time_seconds()
{
  echo "Counting to  seconds"
  time_func 
}

function time_minutes()
{
  echo "Counting to  minutes"
  time_func *60
}

function time_hours()
{
  echo "Counting to  hours"
  time_func *60*60
}

function time_flexible()  # Accepts flexible input hh:mm:ss
{
    echo "Counting to "
    secs=$(time2seconds )
    time_func $secs
}

function play_sound()  # Adjust to your system
{
    cat  > /dev/dsp
}

function time2seconds() # Changes hh:mm:ss to seconds. Found in some other Stack Exchange answer
{ 
    a=( ${1//:/ }) 
    echo $((${a[0]}*3600+${a[1]}*60+${a[2]})) 
}

#11 楼

wget -q -O - http://git.io/sinister | sh -s -- -u https://raw.githubusercontent.com/coryfklein/sw/master/sw

sw
 - start a stopwatch from 0, save start time in ~/.sw
sw [-r|--resume]
 - start a stopwatch from the last saved start time (or current time if no last saved start time exists)
 - "-r" stands for --resume

#12 楼

#!/bin/sh
# script to create timer in terminal
# Jason Atwood
# 2013/6/22

# Start up
echo "starting timer script ..."
sleep 1 # seconds

# Get input from user
read -p "Timer for how many minutes?" -e 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
if [ $MINS == 0 ] && [ $SECS == 0 ]    # if mins = 0 and secs = 0 (i.e. if time expired)
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

#13 楼

pip install termtime

#14 楼

#15 楼

export now="`date +%s -u`";
watch -n 0,1 'date +%T -u -d @$((`date +%s` - $now ))'

#Big plain characters
watch -n 0,1 'date +%T -u -d @$((`date +%s` - $now )) | toilet -f mono12'

#Big empty charaters
watch -n 0,1 'date +%T -u -d @$((`date +%s` - $now )) | figlet -c -f big'

#16 楼

#!/usr/bin/python

def stopwatch ( atom = .01 ):
    import time, sys, math

    start = time.time()
    last = start
    sleep = atom/2
    fmt = "\r%%.%sfs" % (int(abs(round(math.log(atom,10))))  if atom<1 else "")
    while True:
        curr = time.time()
        subatom = (curr-last)
        if subatom>atom:
            # sys.stdout.write( "\r%.2fs" % (curr-start))
            sys.stdout.write( fmt % (curr-start))
            sys.stdout.flush()
            last = curr
        else:
            time.sleep(atom-subatom)

stopwatch()

#17 楼

function stopwatch(){
    date1=`date +%s`;
    while true; do
        echo -ne "$(date -jf "%s" $((`date +%s` - $date1)) +%H:%M:%S)\r";
        sleep 0.1
    done
}

#18 楼

N=100; while [[ $((--N)) >  0 ]]; do  echo  $N |  figlet -c && sleep 1 ; done

N=100; while [[ $((--N)) >  0 ]]; do  echo -e "3[2J3[0m"; echo "$N" |  figlet -c && sleep 1 ; done

N=100; while [[ $((--N)) >  0 ]]; do  echo  $N  && sleep 1 ; done

N=100; while [[ $((--N)) >  0 ]]; do  echo "$N" |  figlet -c | lolcat &&  sleep 1 ; done

#19 楼

#20 楼

#21 楼

date1=`date +%s`
date1_f=`date +%H:%M:%S____%d/%m`
(
  while true; do 
    date2=$(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)
    echo "# started at $date1_f \n$date2"
  done
) |
zenity --progress \
  --title="Stop Watch" \
  --text="Stop Watch..." \
  --percentage=0

#22 楼

function timer() { case "" in -s) shift;; *) set $(( * 60));; esac; local S=" "; for i in $(seq "" -1 1); do echo -ne "$S\r $i\r"; sleep 1; done; echo -e "$S\rTime's up!"; }

#23 楼

#!/usr/bin/env ruby

n = ARGV[0].to_f
go_beginning_of_line = "3[G"
clear_till_end_of_line = "3[K"

time_end = Time.now + n
while Time.now < time_end
    more = time_end - Time.now
    print "#{go_beginning_of_line}Counting down #{more.round(1)} of #{n} seconds#{clear_till_end_of_line}"
    sleep [0.1, more].min
end
puts "#{go_beginning_of_line}Counting down #{n} seconds. \a\aDone.#{clear_till_end_of_line}"

#24 楼

#include <iostream>
#include <string>
#include <chrono>

int timer(seconds count) {
  auto t1 = high_resolution_clock::now();
  auto t2 = t1+count;
  while ( t2 > high_resolution_clock::now()) {
    std::cout << "Seconds Left:" <<
    std::endl <<
      duration_cast<duration<double>>(count-(high_resolution_clock::now()-t1)).count() <<
    std::endl << "3[2A3[K";
    std::this_thread::sleep_for(milliseconds(100));
  }
  std::cout << "Finished" << std::endl;
  return 0;
}