06-08-2010
C function to start process but to return right away
Hello,
I am using C on a Centos box with gcc as the compiler.
I want a function to do something, them make an http request to some server (most probably using curl but suggestions are welcome) and return right away without waiting for the server's answer on that request.
What should I use (library, function, design...) to achieve that?
Thank you
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CLOCK(3) Linux Programmer's Manual CLOCK(3)
NAME
clock - Determine processor time
SYNOPSIS
#include <time.h>
clock_t clock(void);
DESCRIPTION
The clock() function returns an approximation of processor time used by the program.
RETURN VALUE
The value returned is the CPU time used so far as a clock_t; to get the number of seconds used, divide by CLOCKS_PER_SEC. If the processor
time used is not available or its value cannot be represented, the function returns the value (clock_t)-1.
CONFORMING TO
ANSI C. POSIX requires that CLOCKS_PER_SEC equals 1000000 independent of the actual resolution.
NOTES
The C standard allows for arbitrary values at the start of the program; subtract the value returned from a call to clock() at the start of
the program to get maximum portability.
Note that the time can wrap around. On a 32bit system where CLOCKS_PER_SEC equals 1000000 this function will return the same value approx-
imately every 72 minutes.
On several other implementations, the value returned by clock() also includes the times of any children whose status has been collected via
wait() (or another wait-type call). Linux does not include the times of waited-for children in the value returned by clock(). The times()
function, which explicitly returns (separate) information about the caller and its children, may be preferable.
SEE ALSO
getrusage(2), times(2)
GNU
2002-06-14 CLOCK(3)