Movatterモバイル変換

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Sleeping in a batch file

When writing a batch file to automate something on a Windows box, I've needed to pause its execution for several seconds (usually in a test/wait loop, waiting for a process to start). At the time, the best solution I could find uses ping (I kid you not) to achieve the desired effect. I've found a better write-up of ithere, which describes a callable "wait.bat", implemented as follows:

@ping 127.0.0.1 -n 2 -w 1000 > nul@ping 127.0.0.1 -n %1% -w 1000> nul

You can then include calls to wait.bat in your own batch file, passing in the number of seconds to sleep.

Apparently the Windows 2003 Resource Kit provides a Unix-like sleep command (at last!). In the meantime, for those of us still using Windows XP, Windows 2000 or (sadly)Windows NT, is there a better way?

I modified thesleep.py script in theaccepted answer, so that it defaults to one second if no arguments are passed on the command line:

import time, systime.sleep(float(sys.argv[1]) if len(sys.argv) > 1 else 1)

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15
This should be accurate, but it is a CPU intensive way to go about it. Normally you want an interupt driven implementation so that the process does not consume CPU cycles while it waits. This shouldn't be a problem for infrequent short waits, as is probably the case for most batch situations. But a continuously running process with long waits could have a negative impact on system performance.
dbenham
– dbenham
2012-02-15 21:43:24 +00:00
CommentedFeb 15, 2012 at 21:43
4
As it uses the system clock the accuracy is one second. If 2 seconds is specified, the delay can be anything between 2 seconds and 3 seconds (actually 2.99999... seconds).
Peter Mortensen
– Peter Mortensen
2012-08-15 06:49:31 +00:00
CommentedAug 15, 2012 at 6:49
What if the time is now 7:59:59 and you want to wait 7 seconds? This looks like it doesn't take that into account.
ashes999
– ashes999
2012-09-28 18:45:24 +00:00
CommentedSep 28, 2012 at 18:45
This consumes more CPU time than it counts system time. In addition you are doing arithmetic operations with octal numbers, since minutes and seconds smaller than 10 are displayed with a leading 0 in theTIME command.
Andreas
– Andreas
2013-03-01 15:32:04 +00:00
CommentedMar 1, 2013 at 15:32
2
@mrt: The problem is that your%TIME% use a comma to separate the centiseconds, instead of a point! Just add a comma inDELIMS=:.,"...
Aacini
– Aacini
2015-06-22 14:14:52 +00:00
CommentedJun 22, 2015 at 14:14

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Movatterモバイル変換

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Sleeping in a batch file

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