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OpenSolaris 2009.06 - man page for difftime (opensolaris section 3c)

difftime(3C)						   Standard C Library Functions 					      difftime(3C)

NAME
difftime - computes the difference between two calendar times
SYNOPSIS
#include <time.h> double difftime(time_t time1, time_t time0);
DESCRIPTION
The difftime() function computes the difference between two calendar times.
RETURN VALUES
The difftime() functions returns the difference (time1-time0) expressed in seconds as a double.
USAGE
The difftime() function is provided because there are no general arithmetic properties defined for type time_t.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+
SEE ALSO
ctime(3C), attributes(5), standards(5) SunOS 5.11 24 Jul 2002 difftime(3C)