如何在DCL中创建倒数计时器 - OpenVMS

时间:2017-09-22 10:01:03

标签: shell timer openvms dcl

我写了一个脚本,它会向用户邮件ID发送OTP(一次性密码)。因此,每当系统将OTP发送给用户时,我想启动1分钟的倒数计时器。但我不知道如何使用DCL Scripting启动倒计时器。任何想法?

下面是我用来生成OTP的脚本。但是我需要倒数计时器...是否可以在屏幕上显示倒计时? 请帮助!!

$! RAND - returns a positive random number ("RANDOM") between 0 and 
$!        __CEIL - 1. 
$! sharris-at-sdsdmvax.fb3.noaa.gov 
$ RAND: 
$ 
$ IF F$TYPE(__SEED) .EQS. "" 
$ THEN 
$     ! seed the random number generator, ... 
$     __NOW = F$CVTIME() 
$     __HOUR = 'F$EXTRACT(11,2,__NOW)' 
$     __MINUTE = 'F$EXTRACT(14,2,__NOW)' 
$     __SECOND = 'F$EXTRACT(17,2,__NOW)' 
$     __TICK = 'F$EXTRACT(20,2,__NOW)' 
$ 
$     __SEED == __TICK + (100 * __SECOND) + (6000 * __MINUTE) + - 
         (360000 * __HOUR) 
$     ! the generator tends to do better with a large, odd seed, ... 
$     __SEED == (__SEED .OR. 1) 
$     ! clean up, ... 
$     DELETEX/SYMBOL __NOW 
$     DELETEX/SYMBOL __HOUR 
$     DELETEX/SYMBOL __MINUTE 
$     DELETEX/SYMBOL __SECOND 
$     DELETEX/SYMBOL __TICK 
$ ENDIF 
$ 
$ IF F$TYPE(__CEIL) .EQS. "" THEN __CEIL = %X3FFFFFFF 
$ 
$ __SEED == __SEED * 69069 + 1 
$ RANDOM == (__SEED.AND.%X3FFFFFFF)/(%X40000000/__CEIL) 
$ define sys$output MANAGERS:[EMAL]random.txt
$ sh sym RANDOM
$ deassign sys$output
$ sear MANAGERS:[EMAL]random.txt random /out=MANAGERS:[EMAL]random1.txt
$ open in MANAGERS:[EMAL]random1.txt
$ LOOP4:
$ READ/END_OF_FILE=ENDIT4 IN RANDO
$ GOTO LOOP4
$ ENDIT4:
$ close in
$ RANDOM1 = F$EXTRACT(30,8,RANDO)
$ sh sym RANDOM1
$ mail a.txt smtp%"xx@x.com" /sub="Your Password is ''RANDOM1' "

当我运行上面的脚本时,我的OTP将如下:

Your Password is 1218A57A

1 个答案:

答案 0 :(得分:0)

这是一个显示倒计时的基本DCL循环。正如其他人所说,它不会是60秒,但我猜这并不重要。

 $       X = 60
 $ 1$:   WRITE SYS$OUTPUT X, " Seconds"
 $       WAIT 00:00:01.00
 $       X = X - 1
 $       IF X .GT. 0 THEN GOTO 1$
 $

如果从其他评论中不清楚,除非您出于某种原因将密码保存在random.txt文件中,否则您可以简化脚本的最后一位。而不是:

 $ define sys$output MANAGERS:[EMAL]random.txt
 $ sh sym RANDOM
 $ deassign sys$output
 $ sear MANAGERS:[EMAL]random.txt random /out=MANAGERS:[EMAL]random1.txt
 $ open in MANAGERS:[EMAL]random1.txt
 $ LOOP4:
 $ READ/END_OF_FILE=ENDIT4 IN RANDO
 $ GOTO LOOP4
 $ ENDIT4:
 $ close in
 $ RANDOM1 = F$EXTRACT(30,8,RANDO)
 $ sh sym RANDOM1
 $ mail a.txt smtp%"xx@x.com" /sub="Your Password is ''RANDOM1' "

相反:

 $ RANDOM1 = F$FAO("!XL",RANDOM)
 $ mail a.txt smtp%"xx@x.com" /sub="Your Password is ''RANDOM1'"