49 lines
1.1 KiB
Text
49 lines
1.1 KiB
Text
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.TH SECONDS 1
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.SH NAME
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seconds \- convert human-readable date (and time) to seconds since epoch
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.SH SYNOPSIS
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.B seconds
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.I date
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\&...
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.SH DESCRIPTION
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.I Seconds
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prints the number of seconds since 1 Jan 1970
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corresponding to one or more human-readable
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.IR date s.
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Each
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.I date
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must be
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.I one
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argument;
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it will usually be necessary to enclose it in quotes.
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.PP
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.I Seconds
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accepts a somewhat wider range of input than just output from
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.IR date (1).
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The main requirement is that the date must be fully specified,
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with a day of month, month and year
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in any order.
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The month must be an English name (or abbreviation),
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not a number, and the year must contain 4 digits.
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Unambiguous time-zone names are understood (i.e., not
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.LR IST )
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or time zones may be written as
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.IR ±hhmm .
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Case is ignored.
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.SH EXAMPLES
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Print the names of all files under
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.L \&.
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modified since the start of 23 May 2011.
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.IP
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.EX
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du -ta | awk '$1 >= '^`{seconds '23 may 2011'}^' {print $2}'
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.EE
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.SH SEE ALSO
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.IR date (1),
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.IR du (1),
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.IR mtime (1),
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.IR ctime (2)
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.SH BUGS
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All-numeric dates, popular in the USA, are simply ambiguous,
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more so if the year is truncated to 2 digits.
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