xenial (1) dateutils.dseq.1.gz

Provided by: dateutils_0.3.1-1.1_amd64 bug

NAME

       dseq - Generate a sequence of date/times from FIRST to LAST, optionally in steps of

SYNOPSIS

       dseq [OPTION]... FIRST [[INCREMENT] LAST]

DESCRIPTION

       Generate a sequence of date/times from FIRST to LAST, optionally in steps of INCREMENT (which defaults to
       `1d').

       If LAST is omitted it defaults to `now' if FIRST is a date/time, or `today' if FIRST is a date, or `time'
       if FIRST is a time.

       The  values of FIRST and LAST are always inclusive and no date/times before FIRST and no date/times after
       LAST will be printed.

       Negative INCREMENTs must be given, i.e. if FIRST is newer than LAST.

       Recognized OPTIONs:

       -h, --help
              Print help and exit

       -V, --version
              Print version and exit

       -q, --quiet
              Suppress message about date/time and duration parser errors and fix-ups.  The default is to  print
              a warning or the fixed up value and return error code 2.

       -f, --format=STRING
              Output format.  This can either be a specifier string (similar to strftime()'s FMT) or the name of
              a calendar.

       -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.

       -s, --skip=STRING...
              Skip weekdays specified by STRING.  STRING can be a single weekday (Mon, Tue, etc.), and  to  skip
              several  days  the --skip option can be used multiple times.  STRING can also be a comma-separated
              list of weekday names, or `ss' to skip weekends (sat+sun) altogether.   STRING  can  also  contain
              date ranges like `mo-we' for monday to wednesday.

       --alt-inc=STRING
              Alternative  increment  to  use  when a date is hit that is skipped as per --skip.  This increment
              will be applied until a non-skipped date is reached.  The special case `0'  (default)  deactivates
              alternative  incrementing.   A  useful  value could be `1d' for increasing sequences and `-1d' for
              decreasing sequences, so if a skipped date is encountered the next non-skipped  date  after/before
              will be used.

       --compute-from-last
              Compute a start value from LAST using INCREMENT.  This option has an effect only when INCREMENT is
              not a divisor of the duration between FIRST and LAST.  In such case, an alternative FIRST will  be
              computed by consecutively subtracting INCREMENT from LAST until FIRST is hit or crossed.

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,  day of week is Sun (range 00 to 53)
         %V  The ISO week count,  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,  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
         %Z  The zone offset in hours and minutes (HH:MM) with
             a preceding sign (+ for offsets east of UTC, - for offsets
             west of UTC)

         %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  (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   Suffix, treat days as business days

       By design dates before 1601-01-01 are not supported.

       For conformity here is a list of calendar designators and their corresponding format string:
         ymd     %Y-%m-%d
         ymcw    %Y-%m-%c-%w
         ywd     %rY-W%V-%u
         bizda   %Y-%m-%db
         lilian     n/a
         ldn        n/a
         julian     n/a
         jdn        n/a

       These   designators  can  be  used  as  output  format  string,  moreover,  @code{lilian}/@code{ldn}  and
       @code{julian}/@code{jdn} can also be used as input format string.

SPECIFYING DURATIONS

       Some tools ("dadd", "dseq") need durations as their input.  Durations  are  generally  incompatible  with
       input formats as specified by "-i|--input-format" and (at the moment) the input syntax is fixed.

       The  general  format  is  "+-Nunit"  where  "+"  or "-" is the sign, "N" a number, and "unit" the unit as
       discussed below.

       Units:
         s  seconds
         m  minutes
         h  hours
         rs real-life seconds, as in including leap  transitions

         d  days
         b  business days
         mo months
         y  years

EXAMPLES

         $ dseq 2012-02-01 2012-03-01
         2012-02-01
         2012-02-02
         2012-02-03
         2012-02-04
         2012-02-05
         2012-02-06
         2012-02-07
         2012-02-08
         2012-02-09
         2012-02-10
         2012-02-11
         2012-02-12
         2012-02-13
         2012-02-14
         2012-02-15
         2012-02-16
         2012-02-17
         2012-02-18
         2012-02-19
         2012-02-20
         2012-02-21
         2012-02-22
         2012-02-23
         2012-02-24
         2012-02-25
         2012-02-26
         2012-02-27
         2012-02-28
         2012-02-29
         2012-03-01
         $

         $ dseq 2001-02-03 2001-03-03 --skip sat -f "%F %a"
         2001-02-04 Sun
         2001-02-05 Mon
         2001-02-06 Tue
         2001-02-07 Wed
         2001-02-08 Thu
         2001-02-09 Fri
         2001-02-11 Sun
         2001-02-12 Mon
         2001-02-13 Tue
         2001-02-14 Wed
         2001-02-15 Thu
         2001-02-16 Fri
         2001-02-18 Sun
         2001-02-19 Mon
         2001-02-20 Tue
         2001-02-21 Wed
         2001-02-22 Thu
         2001-02-23 Fri
         2001-02-25 Sun
         2001-02-26 Mon
         2001-02-27 Tue
         2001-02-28 Wed
         2001-03-01 Thu
         2001-03-02 Fri
         $

         $ dseq --compute-from-last 2001-02-03 1 2001-03-03 --skip sat -f "%F %a"
         2001-02-04 Sun
         2001-02-05 Mon
         2001-02-06 Tue
         2001-02-07 Wed
         2001-02-08 Thu
         2001-02-09 Fri
         2001-02-11 Sun
         2001-02-12 Mon
         2001-02-13 Tue
         2001-02-14 Wed
         2001-02-15 Thu
         2001-02-16 Fri
         2001-02-18 Sun
         2001-02-19 Mon
         2001-02-20 Tue
         2001-02-21 Wed
         2001-02-22 Thu
         2001-02-23 Fri
         2001-02-25 Sun
         2001-02-26 Mon
         2001-02-27 Tue
         2001-02-28 Wed
         2001-03-01 Thu
         2001-03-02 Fri
         $

         $ dseq 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-06 Tue
         2001-02-12 Mon
         2001-02-15 Thu
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-27 Tue
         $

         $ dseq --compute-from-last 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-13 Tue
         2001-02-19 Mon
         2001-02-22 Thu
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq 2001-02-05 4 2001-03-04 -f "%F %a"
         2001-02-05 Mon
         2001-02-09 Fri
         2001-02-13 Tue
         2001-02-17 Sat
         2001-02-21 Wed
         2001-02-25 Sun
         2001-03-01 Thu
         $

         $ dseq --compute-from-last 2001-02-05 4 2001-03-04 -f "%F %a"
         2001-02-08 Thu
         2001-02-12 Mon
         2001-02-16 Fri
         2001-02-20 Tue
         2001-02-24 Sat
         2001-02-28 Wed
         2001-03-04 Sun
         $

         $ dseq --alt-inc 1d 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-11 Sun
         2001-02-14 Wed
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq --compute-from-last --alt-inc 1d 2001-02-03 3 2001-03-03 --skip sat,fri -f "%F %a"
         2001-02-04 Sun
         2001-02-07 Wed
         2001-02-11 Sun
         2001-02-14 Wed
         2001-02-18 Sun
         2001-02-21 Wed
         2001-02-25 Sun
         2001-02-28 Wed
         $

         $ dseq 2001-01-01 2d 2001-01-08
         2001-01-01
         2001-01-03
         2001-01-05
         2001-01-07
         $

         $ dseq --compute-from-last 2001-01-01 2d 2001-01-08
         2001-01-02
         2001-01-04
         2001-01-06
         2001-01-08
         $

         $ dseq 2001-01-08 -2d 2001-01-01
         2001-01-08
         2001-01-06
         2001-01-04
         2001-01-02
         $

         $ dseq --compute-from-last 2001-01-08 -2d 2001-01-01
         2001-01-07
         2001-01-05
         2001-01-03
         2001-01-01
         $

         $ dseq 10:00:00 12m 11:20:00
         10:00:00
         10:12:00
         10:24:00
         10:36:00
         10:48:00
         11:00:00
         11:12:00
         $

         $ dseq --compute-from-last 10:00:00 12m 11:20:00
         10:08:00
         10:20:00
         10:32:00
         10:44:00
         10:56:00
         11:08:00
         11:20:00
         $

         $ dseq 11:20:00 -12m 10:00:00
         11:20:00
         11:08:00
         10:56:00
         10:44:00
         10:32:00
         10:20:00
         10:08:00
         $

         $ dseq --compute-from-last 11:20:00 -12m 10:00:00
         11:12:00
         11:00:00
         10:48:00
         10:36:00
         10:24:00
         10:12:00
         10:00:00
         $

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 dseq is maintained as a Texinfo manual.  If the info  and  dseq  programs  are
       properly installed at your site, the command

              info (dateutils)dseq

       should give you access to the complete manual.