calculate time difference NAME difftime - calculate time difference LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <......suseconds_t : <sys/select.h> and <sys/time.h> . SEE ALSO stime (2), time (2), ctime (3), difftime (3), usleep (3), timeval (3type)...suseconds_t : <sys/select.h> and <sys/time.h> . SEE ALSO stime (2), time (2), ctime (3), difftime (3), usleep (3), timeval (3type)...suseconds_t : <sys/select.h> and <sys/time.h> . SEE ALSO stime (2), time (2), ctime (3), difftime (3), usleep (3), timeval (3type)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)...libc implementation. SEE ALSO date (1), gettimeofday (2), time (2), utime (2), clock (3), difftime (3), strftime (3), strptime (3), timegm (3), tzset (3), time (7)