Provided by: dateutils_0.2.5-1_amd64 
NAME
dgrep - Find date or time matches in input stream
SYNOPSIS
dgrep [OPTION]... EXPRESSION
DESCRIPTION
dgrep 0.2.5
Grep standard input for lines that match EXPRESSION.
EXPRESSION may be date/times prefixed with an operator `<', `<=', '=', '>=', '>', `!=', `<>' (if omitted
defaults to `='), which will match lines with date/times which are older, older-equal, equal,
newer-equal, newer, or not equal respectively.
EXPRESSION may also be format specifiers infixed by above operators and suffixed by a value (e.g.
`%a="Wed"') which matches lines whose %a representation (weekday name abbreviated) is "Wed".
EXPRESSION may be statements as described above concatenated through `&&' (for conjunction) or `||'
(disjunction), both of which may be parenthesised as per usual to change precedence (`&&' goes over
`||').
If multiple date/times occur on the same line and any one of them fulfills the criteria then the line is
considered a match and will be output.
-h, --help
Print help and exit
-V, --version
Print version and exit
-q, --quiet
Suppress message about date/time and duration parser errors.
-i, --input-format=STRING
Input format, can be used multiple times. Each date/time will be passed to the input format
parsers in the order they are given, if a date/time can be read successfully with a given input
format specifier string, that value will be used.
-e, --backslash-escapes
Enable interpretation of backslash escapes in the output and input format specifier strings.
-o, --only-matching
Show only the part of a line matching DATE.
Group: op
Operations can be specified by options as well. In all cases EXPRESSION must be a date/time and
no concatenation is through conjunction (`&&') or disjunction (`||') operators is possible.
This serves solely as a means of convenience, e.g. the dtest tool has a similar syntax.
--eq Lines match when date/times are equal to EXPRESSION.
--ne Lines match when date/times are not the same as EXPRESSION.
--gt Lines match when date/times are newer than EXPRESSION.
--lt Lines match when date/times are older than EXPRESSION.
--ge Lines match when date/times are newer than or equal EXPRESSION.
--le Lines match when date/times are older than or equal EXPRESSION.
--nt Lines match when date/times are newer than or equal EXPRESSION.
--ot Lines match when date/times are older than or equal EXPRESSION.
EXAMPLES
% dgrep 2012-03-01 <<EOF
2012-02-28
2012-02-29
2012-03-01
2012-03-02
EOF
2012-03-01
% dgrep '<2012-03-01' <<EOF
2012-02-28
2012-02-29
2012-03-01
2012-03-02
EOF
2012-02-28
2012-02-29
% dgrep =2012-03-01 <<EOF
2012-02-28
2012-02-29
2012-03-01
2012-03-02
EOF
2012-02-28
2012-02-29
2012-03-02
% dgrep =2012-03-01 <<EOF
Feb 2012-02-28
Feb 2012-02-29 leap day
Mar 2012-03-01
Mar 2012-03-02
EOF
Mar 2012-03-01
% dgrep -o <2012-03-01 <<EOF
Feb 2012-02-28
Feb 2012-02-29 leap day
Mar 2012-03-01
Mar 2012-03-02
EOF
2012-02-28
2012-02-29
% dgrep '>=12:00:00' <<EOF
fileA 11:59:58
fileB 11:59:59 leap second?
fileNOON 12:00:00 new version
fileC 12:03:12
EOF
fileNOON 12:00:00 new version
fileC 12:03:12
% dgrep -o '>=12:00:00' <<EOF
fileA 11:59:58
fileB 11:59:59 leap second?
fileNOON 12:00:00 new version
fileC 12:03:12
EOF
12:00:00
12:03:12
% dgrep 2012-03-01 <<EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
2012-03-01T10:00:00
2012-03-02T10:00:00
EOF
2012-03-01T10:00:00
% dgrep '<2012-03-01' <<EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
2012-03-01T10:00:00
2012-03-02T10:00:00
EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
% dgrep 2012-03-01T10:00:00 <<EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
2012-03-01T10:00:00
2012-03-02T10:00:00
EOF
2012-03-01T10:00:00
% dgrep '<2012-03-01T14:00:00' <<EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
2012-03-01T10:00:00
2012-03-02T10:00:00
EOF
2012-02-28T10:00:00
2012-02-29T10:00:00
2012-03-01T10:00:00
FORMAT SPECS
Format specs in dateutils are similar to posix' strftime().
However, due to a broader range of supported calendars dateutils must employ different rules.
Date specs:
%a The abbreviated weekday name
%A The full weekday name
%_a The weekday name shortened to a single character (MTWRFAS)
%b The abbreviated month name
%B The full month name
%_b The month name shortened to a single character (FGHJKMNQUVXZ)
%c The count of the weekday within the month (range 00 to 05)
%C The count of the weekday within the year (range 00 to 53)
%d The day of the month, 2 digits (range 00 to 31)
%D The day of the year, 3 digits (range 000 to 366)
%F Equivalent to %Y-%m-%d (ymd's canonical format)
%j Equivalent to %D
%m The month in the current calendar (range 00 to 19)
%Q The quarter of the year (range Q1 to Q4)
%q The number of the quarter (range 01 to 04)
%s The number of seconds since the Epoch.
%u The weekday as number (range 01 to 07, Sunday being 07)
%U The week count, first day of week is Sun (range 00 to 53)
%V The ISO week count, first day of week is Mon (range 01 to 53)
%w The weekday as number (range 00 to 06, Sunday being 00)
%W The week count, first day of week is Mon (range 00 to 53)
%y The year without a century (range 00 to 99)
%Y The year including the century
%Od The day as roman numerals
%Om The month as roman numerals
%Oy The two digit year as roman numerals
%OY The year including the century as roman numerals
%rs In time systems whose Epoch is different from the unix Epoch, this
selects the number of seconds since then.
%rY In calendars with years that don't coincide with the Gregorian
years, this selects the calendar's year.
%dth The day of the month as an ordinal number, 1st, 2nd, 3rd, etc.
%mth The month of the year as an ordinal number, 1st, 2nd, 3rd, etc.
%db The business day of the month (since last month's ultimo)
%dB Number of business days until this month's ultimo
Time specs:
%H The hour of the day using a 24h clock, 2 digits (range 00 to 23)
%I The hour of the day using a 12h clock, 2 digits (range 01 to 12)
%M The minute (range 00 to 59)
%N The nanoseconds (range 000000000 to 999999999)
%p The string AM or PM, noon is PM and midnight is AM.
%P Like %p but in lowercase
%S The second (range 00 to 60, 60 is for leap seconds)
%T Equivalent to %H:%M:%S
General specs:
%n A newline character
%t A tab character
%% A literal % character
Modifiers:
%O Modifier to turn decimal numbers into Roman numerals
%r Modifier to turn units into real units
th Suffix. Read and print ordinal numbers
b Treat date as business date
By design dates before 1601-01-01 are not supported.
For conformity here is a list of calendar spec names and their meaning:
ymd %Y-%m-%d
ymcw %Y-%m-%c-%w
ywd %rY-W%V-%u
bizda %Y-%m-%db
AUTHOR
Written by Sebastian Freundt <freundt@fresse.org>
REPORTING BUGS
Report bugs to: https://github.com/hroptatyr/dateutils/issues
SEE ALSO
The full documentation for dgrep is maintained as a Texinfo manual. If the info and dgrep programs are
properly installed at your site, the command
info (dateutils)dgrep
should give you access to the complete manual.
dateutils 0.2.5 October 2013 DGREP(1)