[PATCH] gmtime man page
Brian Ford
Brian.Ford@flightsafety.com
Thu Jul 20 16:03:00 GMT 2006
The gmtime man page says it assumes the time at clock represents a local
time, and that it converts it to UTC. This is not true. clock is the
standard time_t representation of seconds elapsed since 00:00:00 on
January 1, 1970, UTC, thus it is not a local time and no UTC conversion
occurs.
2006-07-19 Brian Ford <Brian.Ford@FlightSafety.com>
* libc/time/gmtime.c: Correct man page; clock is not a
local time and no conversion occurs.
--
Brian Ford
Lead Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained crew...
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Index: libc/time/gmtime.c
===================================================================
RCS file: /cvs/src/src/newlib/libc/time/gmtime.c,v
retrieving revision 1.2
diff -u -p -r1.2 gmtime.c
--- libc/time/gmtime.c 17 Apr 2002 21:23:31 -0000 1.2
+++ libc/time/gmtime.c 19 Jul 2006 16:41:24 -0000
@@ -29,11 +29,11 @@ TRAD_SYNOPSIS
struct tm *<[res]>;
DESCRIPTION
-<<gmtime>> assumes the time at <[clock]> represents a local time.
-<<gmtime>> converts it to UTC (Universal Coordinated Time, also known in some
-countries as GMT, Greenwich Mean time), then converts the
-representation from the arithmetic representation to
-the traditional representation defined by <<struct tm>>.
+<<gmtime>> takes the time at <[clock]> representing the number
+of elapsed seconds since 00:00:00 on January 1, 1970, Universal
+Coordinated Time (UTC, also known in some countries as GMT,
+Greenwich Mean time) and converts it to a <<struct tm>>
+representation.
<<gmtime>> constructs the traditional time representation in static
storage; each call to <<gmtime>> or <<localtime>> will overwrite the
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