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| | sleep - suspend execution for an interval |
SYNOPSIS
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The sleep utility will suspend execution for at least the integral number of seconds specified by the time operand.
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The following operands are supported:
-
time
- A non-negative decimal integer specifying the number of seconds for which to suspend
execution.
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| | Example 1. Example of the sleep command.
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To execute a command after a certain amount of time: or to execute a command every so often:
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while true
do
command
sleep 37
done
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See environ(5) for descriptions of the following environment
variables that affect the execution of sleep: LC_CTYPE, LC_MESSAGES, and NLSPATH.
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The following exit values are returned:
-
0
- The execution was successfully suspended for at least time seconds, or
a SIGALRM signal was received (see NOTES).
-
>0
- An error has occurred.
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See attributes(5) for descriptions of the following
attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Availability | SUNWcsu |
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If the sleep utility receives a SIGALRM signal, one of the following actions will be taken:
- Terminate normally with a zero exit status.
- Effectively ignore the signal.
The sleep utility will take the standard action for all other signals.
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