Jump to content

ctime

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Fresheneesz (talk | contribs) at 05:56, 4 November 2006 (add note about time.h). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

For the c++ library <ctime>, see time.h

In computing, ctime is the number of seconds since 0:00:00 January 1, 1970 UTC. Commonly stored as a 32 bit signed integer, this number is used for pinpointing dates in many computers and operating systems, such as Linux and UNIX variants, as well as some programming languages. For example, the function ctime() was included in ANSI C. It will overflow in 2038 and cause the year 2038 problem; some expect this will be an event similar to Y2K.

To determine the current ctime on a UNIX system, issue the command "date +%s".

ctime is also a Unix library call which returns the local time as a human readable ASCII string.

ctime in a Unix filesystem is a file attribute which tells when the file's inode was last modified. See: Stat (Unix).

See also

Stub icon

This Unix-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Ctime&oldid=85619340"