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How to halt Prog Execution for some time?


 
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# 1  
Old 09-07-2003
Question How to halt Prog Execution for some time?

Hi,
Perhaps I am asking a silly question, but I really don't know about it. Can anyone tell me the function for "sleep" kind of functionality in C language for Unix. I don't think any function with the name of sleep() exits in Unix's C language. or perhaps I am not known with the header file required for this. Can anyone guide me about the correct function to halt the program execution for a specified time? Do tell me the header file required for the function as well.

Regards,
# 2  
Old 09-07-2003
There is. Right from the man page:

Code:
SLEEP(3)                       Linux Programmer's Manual                       SLEEP(3)

NAME
       sleep - Sleep for the specified number of seconds

SYNOPSIS
       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION
       sleep()  makes the current process sleep until seconds seconds have elapsed or a
       signal arrives which is not ignored.

RETURN VALUE
       Zero if the requested time has elapsed, or the number of seconds left to  sleep.

# 3  
Old 10-10-2003
There's also usleep to do the same with microsecond granularity.
# 4  
Old 10-15-2003
If you do 'man sleep' you will get the first entry it finds which is the shell sleep command in manual section 1(?).

To get the C definiton of the sleep function you need to qualify the manual section to search into: 'man 3 sleep'

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