1FUNCTION::CTIME(3stap)      Time utility functions      FUNCTION::CTIME(3stap)
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NAME

6       function::ctime - Convert seconds since epoch into human readable
7       date/time string
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SYNOPSIS

10           ctime:string(epochsecs:long)
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ARGUMENTS

13       epochsecs
14           Number of seconds since epoch (as returned by gettimeofday_s)
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DESCRIPTION

17       Takes an argument of seconds since the epoch as returned by
18       gettimeofday_s. Returns a string of the form
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20       “Wed Jun 30 21:49:08 1993”
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22       The string will always be exactly 24 characters. If the time would be
23       unreasonable far in the past (before what can be represented with a 32
24       bit offset in seconds from the epoch) an error will occur (which can be
25       avoided with try/catch). If the time would be unreasonable far in the
26       future, an error will also occur.
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28       Note that the epoch (zero) corresponds to
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30       “Thu Jan 1 00:00:00 1970”
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32       The earliest full date given by ctime, corresponding to epochsecs
33       -2147483648 is “Fri Dec 13 20:45:52 1901”. The latest full date given
34       by ctime, corresponding to epochsecs 2147483647 is “Tue Jan 19 03:14:07
35       2038”.
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37       The abbreviations for the days of the week are ‘Sun’, ‘Mon’, ‘Tue’,
38       ‘Wed’, ‘Thu’, ‘Fri’, and ‘Sat’. The abbreviations for the months are
39       ‘Jan’, ‘Feb’, ‘Mar’, ‘Apr’, ‘May’, ‘Jun’, ‘Jul’, ‘Aug’, ‘Sep’, ‘Oct’,
40       ‘Nov’, and ‘Dec’.
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42       Note that the real C library ctime function puts a newline (´\n´)
43       character at the end of the string that this function does not. Also
44       note that since the kernel has no concept of timezones, the returned
45       time is always in GMT.
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SEE ALSO

48       tapset::ctime(3stap)
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52SystemTap Tapset Reference         June 2018            FUNCTION::CTIME(3stap)
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