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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | SEE ALSO | COLOPHON |
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FUNCTION::CTIME(3stap) Time utility functions FUNCTION::CTIME(3stap)
function::ctime - Convert seconds since epoch into human readable
date/time string
1) ctime:string(epochsecs:long)
2) ctime:string()
epochsecs
Number of seconds since epoch (as returned by gettimeofday_s)
1) Takes an argument of seconds since the epoch as returned
bygettimeofday_s. Returns a string of the form
2) “Wed Jun 30 21:49:08 1993”
The string will always be exactly 24 characters. If the time
would be unreasonable far in the past (before what can be
represented with a 32 bit offset in seconds from the epoch) an
error will occur (which can be avoided with try/catch). If the
time would be unreasonable far in the future, an error will also
occur.
Note that the epoch (zero) corresponds to
“Thu Jan 1 00:00:00 1970”
The earliest full date given by ctime, corresponding to epochsecs
-2147483648 is “Fri Dec 13 20:45:52 1901”. The latest full date
given by ctime, corresponding to epochsecs 2147483647 is “Tue Jan
19 03:14:07 2038”.
The abbreviations for the days of the week are ‘Sun’, ‘Mon’,
‘Tue’, ‘Wed’, ‘Thu’, ‘Fri’, and ‘Sat’. The abbreviations for the
months are ‘Jan’, ‘Feb’, ‘Mar’, ‘Apr’, ‘May’, ‘Jun’, ‘Jul’,
‘Aug’, ‘Sep’, ‘Oct’, ‘Nov’, and ‘Dec’.
Note that the real C library ctime function puts a newline ('\n')
character at the end of the string that this function does not.
Also note that since the kernel has no concept of timezones, the
returned time is always in GMT.
tapset::ctime(3stap)
This page is part of the systemtap (a tracing and live-system
analysis tool) project. Information about the project can be
found at ⟨https://sourceware.org/systemtap/⟩. If you have a bug
report for this manual page, send it to [email protected].
This page was obtained from the project's upstream Git repository
⟨git://sourceware.org/git/systemtap.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
SystemTap Tapset Reference April 2024 FUNCTION::CTIME(3stap)
Pages that refer to this page: tapset::ctime(3stap)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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