sleep(1) - osol9

1sleep(1)                         User Commands                        sleep(1)
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NAME

6       sleep - suspend execution for an interval
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SYNOPSIS

9   /usr/bin/sleep
10       /usr/bin/sleep seconds
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13   ksh93
14       sleep seconds
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DESCRIPTION

18       sleep  suspends execution for at least the time in seconds specified by
19       seconds or until a SIGALRM signal is received. The seconds operand  can
20       be specified as a floating point number but the actual granularity nor‐
21       mally depends on the underlying system.
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OPERANDS

24   /usr/bin/sleep
25       The following operands are supported  for  /usr/bin/sleep  and  ksh93's
26       sleep built-in command:
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28       seconds    A  non-negative  floating-point number specifying the number
29                  of seconds for which to  suspend  execution.  The  floating-
30                  point  number  may  be  specified in all formats required by
31                  C99/XPG6, including constants such as "Inf" or "infinite".
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34   ksh93
35       The following operands are supported:
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37       time    Specify time in seconds as a floating point number. The  actual
38               granularity depends on the underlying system, normally around 1
39               millisecond.
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EXAMPLES

43       Example 1 Suspending Command Execution
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46       The following example executes a command  after  a  certain  amount  of
47       time:
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50         example% (sleep 105; command)&
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54       Example 2 Executing a Command Every So Often
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57       The following example executes a command every so often:
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60         example% while true
61         do
62                 command
63                 sleep 37
64         done
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68       Example  3 Suspend command execution forever (or until a SIGALRM signal
69       is received)
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71         example% sleep Inf
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75       Example 4 Suspending command execution for 0.5 seconds
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78       Suspending command execution  for  0.5  seconds  using  an  alternative
79       floating-point representation for the value "0.5"
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82         example% printf "%a0 0.5
83         0x1.0000000000000000000000000000p-01
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87         example% sleep 0x1.0000000000000000000000000000p-01
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ENVIRONMENT VARIABLES

92       See  environ(5) for descriptions of the following environment variables
93       that affect the execution of sleep:  LANG,  LC_ALL,  LC_CTYPE,  LC_MES‐
94       SAGES, and NLSPATH.
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EXIT STATUS

97       The following exit values are returned:
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99       0     The  execution  was successfully suspended for at least time sec‐
100             onds, or a SIGALRM signal was received (see NOTES).
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103       >0    An error has occurred.
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ATTRIBUTES

107       See attributes(5) for descriptions of the following attributes:
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109   /usr/bin/sleep
110       ┌─────────────────────────────┬─────────────────────────────┐
111       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
112       ├─────────────────────────────┼─────────────────────────────┤
113       │Availability                 │SUNWcsu                      │
114       ├─────────────────────────────┼─────────────────────────────┤
115       │Interface Stability          │Committed                    │
116       ├─────────────────────────────┼─────────────────────────────┤
117       │Standard                     │See standards(5).            │
118       └─────────────────────────────┴─────────────────────────────┘
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120   ksh93
121       ┌─────────────────────────────┬─────────────────────────────┐
122       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
123       ├─────────────────────────────┼─────────────────────────────┤
124       │Availability                 │SUNWcsu                      │
125       ├─────────────────────────────┼─────────────────────────────┤
126       │Interface Stability          │Uncommitted                  │
127       └─────────────────────────────┴─────────────────────────────┘
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NOTES

134       If  the  sleep  utility receives a SIGALRM signal, one of the following
135       actions is taken:
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137           o      Terminate normally with a zero exit status.
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139           o      Effectively ignore the signal.
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142       The sleep utility takes the standard action for all other signals.
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145       The behavior for input values such as "NaN" (not-a-number) or  negative
146       values is undefined.
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150SunOS 5.11                        20 Nov 2007                         sleep(1)