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Man Pages


Manual Reference Pages  -  TIME (3)

NAME

time - get time of day

CONTENTS

Library
Synopsis
Description
Errors
See Also
Standards
History
Bugs

LIBRARY


.Lb libc

SYNOPSIS


.In time.h time_t time time_t *tloc

DESCRIPTION

The time function returns the value of time in seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal Time. If an error occurs, time returns the value (Vt time_t-1).

The return value is also stored in * tloc, provided that tloc is non-null.

ERRORS

The time function may fail for any of the reasons described in gettimeofday(2).

SEE ALSO

clock_gettime(2), gettimeofday(2), ctime(3)

STANDARDS

The time function conforms to -p1003.1-2001.

HISTORY

A time function appeared in AT&T v6 .

BUGS

Neither -isoC-99 nor -p1003.1-2001 requires time to set errno on failure; thus, it is impossible for an application to distinguish the valid time value -1 (representing the last UTC second of 1969) from the error return value.

Systems conforming to earlier versions of the C and POSIX standards (including older versions of
.Fx ) did not set * tloc in the error case.

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