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A conversation with the autopackage team
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time(3) Library Functions Manual time(3) NAME
time, time64, TIMET32TO64, TIMET64TO32 - Gets time, converts time between time_t and time64_t LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <time.h> time_t time( time_t *tloc); The following data type, function declaration and macros are Compaq extensions and do not conform to current standards. These features are provided to support the time64_t data type and are accessible only when the _TIME64_T feature macro is defined during compilation. #include <time.h> typedef long time64_t; time64_t time64( time64_t *tloc64); void TIMET32TO64(t32, t64) int TIMET64TO32(t64, t32) PARAMETERS
Points to the location where the return value of type time_t is stored. When this parameter is a null pointer, no value is stored. Points to the location where the return value of type time64_t is stored. When this parameter is a null pointer, no value is stored. Refers to a variable of type time_t. Refers to a variable of type time64_t. DESCRIPTION
The time() function returns the time in seconds since the Epoch. The Epoch is referenced to 00:00:00 CUT (Coordinated Universal Time) 1 Jan 1970. The time64_t data type is a 64-bit signed value which, like the 32-bit time_t data type, is defined as the "time in seconds since the Epoch." It is provided for storage and manipulation of times beyond the range of a 32-bit time_t (Dec 13 20:45:52 GMT 1901 through Jan 19 03:14:07 GMT 2038). This data type is only available when the _TIME64_T feature macro is defined during compilation. The time64() function works exactly as the time() function, but uses the larger time64_t type (referenced by the tloc64 pointer) instead of time_t. The current system time setting limits (Jan 1 00:00:00 GMT 1970 through Jan 19 03:14:07 GMT 2038) are not changed by this function or the time64_t data type. This function declaration is only available when the _TIME64_T feature macro is defined during compilation. The TIMET32TO64() and TIMET64TO32() macros are provided to assist developers converting between values of type time_t and values of type time64_t. The TIMET32TO64() macro converts the value contained in t32 to a value of type time64_t and stores the result in t64, performing sign-extension as appropriate. The TIMET64TO32() macro attempts to convert the value contained in t64 to a value of type time_t, storing the result in t32. If the value of t64 overflows the size of a time_t, the value of the TIMET64TO32() macro will be 1 and the value of t32 is undefined. Otherwise, the value of the TIMET64TO32() macro will be 0 and t32 will contain the converted value from t64. These conversion macros are only available when the _TIME64_T feature macro is defined during compilation. RETURN VALUES
Upon successful completion, the time() function returns the value of time in seconds since the Epoch. Otherwise, the value (time_t)-1 is returned. Upon successful completion, the time64() function returns the value of time in seconds since the Epoch. Otherwise, the value (time64_t)-1 is returned. RELATED INFORMATION
Functions: gettimeofday(2), clock(3), ctime(3), difftime(3), stime(3), strftime(3), strptime(3) Standards: standards(5) delim off time(3)
