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+.TH "ttail" 1 "Mon May 15 2017" "Version 0.0.1" "ttail" \" -*- nroff -*-
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+.ad l
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+.nh
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+.SH NAME
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+ttail \- timed tail for logfiles
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+.SH "SYNOSPIS"
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+.PP
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+ttail [OPTION]\&.\&.\&. [FILE]\&.\&.\&.
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+.SH "DESCRIPTION"
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+.PP
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+Display loglines given a minimum date and/or a maximum date\&.
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+.PP
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+\fB-d --date-min=DATE\fP
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+.RS 4
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+Start to output loglines starting from this date
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+.RE
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+.PP
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+\fB-m --date-max=DATE\fP
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+.RS 4
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+Stop to output loglines starting from this date
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+.RE
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+.PP
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+\fB-f --date-format=FMT\fP
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+.RS 4
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+The date format present in the logfiles and used by -d --date-min and -m --date-max options (see \fBDate formats\fP for more details)
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+.RE
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+.PP
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+\fB-p --prefix-len\fP
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+.RS 4
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+Set a constant prefix len to drop for each logline
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+.RE
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+.PP
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+\fB-r --re-prefix=REGEX\fP
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+.RS 4
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+Drop matching prefix for each logline
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+.RE
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+.PP
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+\fB-E --re-extended \fP
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+.RS 4
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+Interpret -r --re-prefix as an extended regular expression (specified by POSIX)
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+.RE
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+.PP
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+\fB-I --re-ignore-cas\fP
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+.RS 4
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+Ignore case for -r --re-prefix option (specified by POSIX)
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+.RE
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+.PP
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+\fB-v[v[v[\&.\&.\&.]]]\fP
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+.RS 4
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+Augment the loglevel
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+.RE
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+.PP
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+.SH "Date formats"
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+.PP
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+ttail understand two date formats : strprtime and relative
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+.SS "Relative date format"
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+Relative date format is used with -d --date-min or -m --date-max arguments\&. The shape of a relative date is '-#[VAL][UNIT]' with VAL an integer and UNIT one of the recognized units :
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+.IP "\(bu" 2
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+y[ear]
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+.IP "\(bu" 2
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+M[onth]
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+.IP "\(bu" 2
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+d[ay]
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+.IP "\(bu" 2
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+h[our]
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+.IP "\(bu" 2
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+m[in]
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+.IP "\(bu" 2
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+s[ec]
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+.PP
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+.SS "Strptime date format"
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+The supported input field descriptors are listed below\&. In case a text string (such as the name of a day of the week or a month name) is to be matched, the comparison is case insensitive\&. In case a number is to be matched, leading zeros are permitted but not required\&.
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+.PP
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+%% The % character\&.
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+.PP
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+%a or A The name of the day of the week according to the current locale, in abbreviated form or the full name\&.
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+.PP
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+%b or B or h The month name according to the current locale, in abbreviated form or the full name\&.
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+.PP
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+%c The date and time representation for the current locale\&.
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+.PP
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+%C The century number (0-99)\&.
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+.PP
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+%d or e The day of month (1-31)\&.
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+.PP
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+%D Equivalent to m/d/y\&. (This is the American style date, very confusing to non-Ameri‐ cans, especially since d/m/y is widely used in Europe\&. The ISO 8601 standard format is Y-m-d\&.)
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+.PP
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+%H The hour (0-23)\&.
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+.PP
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+%I The hour on a 12-hour clock (1-12)\&.
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+.PP
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+%j The day number in the year (1-366)\&.
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+.PP
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+%m The month number (1-12)\&.
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+.PP
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+%M The minute (0-59)\&.
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+.PP
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+%n Arbitrary whitespace\&.
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+.PP
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+%p The locale's equivalent of AM or PM\&. (Note: there may be none\&.)
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+.PP
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+%r The 12-hour clock time (using the locale's AM or PM)\&. In the POSIX locale equivalent to %I:M:S p\&. If t_fmt_ampm is empty in the LC_TIME part of the current locale, then the behavior is undefined\&.
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+.PP
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+%R Equivalent to H:M\&.
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+.PP
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+%S The second (0-60; 60 may occur for leap seconds; earlier also 61 was allowed)\&.
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+.PP
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+%t Arbitrary whitespace\&.
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+.PP
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+%T Equivalent to H:M:S\&.
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+.PP
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+%U The week number with Sunday the first day of the week (0-53)\&. The first Sunday of Janu‐ ary is the first day of week 1\&.
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+.PP
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+%w The ordinal number of the day of the week (0-6), with Sunday = 0\&.
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+.PP
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+%W The week number with Monday the first day of the week (0-53)\&. The first Monday of Janu‐ ary is the first day of week 1\&.
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+.PP
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+%x The date, using the locale's date format\&.
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+.PP
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+%X The time, using the locale's time format\&.
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+.PP
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+%y The year within century (0-99)\&. When a century is not otherwise specified, values in the range 69-99 refer to years in the twentieth century (1969-1999); values in the range 00-68 refer to years in the twenty-first century (2000-2068)\&.
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+.PP
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+%Y The year, including century (for example, 1991)\&.
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+.PP
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+Some field descriptors can be modified by the E or O modifier characters to indicate that an alternative format or specification should be used\&. If the alternative format or specification does not exist in the current locale, the unmodified field descriptor is used\&.
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+.PP
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+The E modifier specifies that the input string may contain alternative locale-dependent versions of the date and time representation:
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+.PP
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+%Ec The locale's alternative date and time representation\&.
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+.PP
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+%EC The name of the base year (period) in the locale's alternative representation\&.
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+.PP
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+%Ex The locale's alternative date representation\&.
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+.PP
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+%EX The locale's alternative time representation\&.
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+.PP
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+%Ey The offset from EC (year only) in the locale's alternative representation\&.
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+.PP
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+%EY The full alternative year representation\&.
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+.PP
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+The O modifier specifies that the numerical input may be in an alternative locale-dependent for‐ mat:
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+.PP
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+%Od or Oe The day of the month using the locale's alternative numeric symbols; leading zeros are permitted but not required\&.
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+.PP
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+%OH The hour (24-hour clock) using the locale's alternative numeric symbols\&.
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+.PP
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+%OI The hour (12-hour clock) using the locale's alternative numeric symbols\&.
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+.PP
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+%Om The month using the locale's alternative numeric symbols\&.
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+.PP
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+%OM The minutes using the locale's alternative numeric symbols\&.
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+.PP
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+%OS The seconds using the locale's alternative numeric symbols\&.
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+.PP
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+%OU The week number of the year (Sunday as the first day of the week) using the locale's alternative numeric symbols\&.
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+.PP
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+%Ow The ordinal number of the day of the week (Sunday=0), using the locale's alternative numeric symbols\&.
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+.PP
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+%OW The week number of the year (Monday as the first day of the week) using the locale's alternative numeric symbols\&.
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+.PP
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+%Oy The year (offset from C) using the locale's alternative numeric symbols\&.
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+.SH "Known limitations"
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+.PP
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+Loglines has to be sorted\&.
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+.SH "AUTHOR"
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+.PP
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+Written by Yann Weber yann.weber@members.fsf.org
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