You have UNIX or Linux, therefore you have mktime and strftime. These functions are fairly standard.
You may have go upgrade your version of mawk to have them in that language.
I think what I have is the newest version of mawk available for my system:
How might I get it to recognize the functions I need? Or, for that matter, how would I verify their availability on my system? Regular awk can use those functions. Does it call the same C functions that mawk apparently does? Thanks again for the responses.
Strange behaviour of the strftime() function from gawk (3.1.5):
$ awk 'BEGIN{print strftime("%T", 3600)}'
> 02:00:00
$ awk 'BEGIN{print strftime("%T", 0)}'
> 01:00:00
Obviously something with DST but I can not figure out why? To me 3600 epoch seconds remains 01:00, DST or not.
From... (2 Replies)
I have two files and would like a report of where they match.
Example of file1:
1 1 1
2 2 2
13 14 15
4 4 4
15 16 17
100 102 1004
56 57 890
Example of file2:
2 2 2
16 10 11
45 22 35
13 14 15
1001 1002 3456
100 102 1004 (1 Reply)
As Brendan O'Conner writes in this blog, mawk is near 8 times faster than gawk, so I am going to give mawk a go, but I got errors when trying to print the length of an array in mawk using length() function, is it not supported in mawk? or there's another way to get the length of an array in mawk?
... (3 Replies)
HI,
i wish to convert a millsec value to a readable string format.
the one option is to use strftime.
However this is a bit costly (1-5 micros).
is there a a faster way to do so with just string manipulation
(Note i have the date object which has the time details but wish o avoid strftime) (2 Replies)
Hi,
I have a line which has n number of words with separated by space.
I wanted to make each word as a separate line.
for example,
i have a file that has line like
i am a good boy
i want the output like,
i
am
a
good (8 Replies)
Hello, I am looking to make a text based game, that runs in the command window, or a window similar. I will only need to use 1 window.
I read somewhere that there is libraries for this kind of thing? But I can't remember the name of them.. Can anyone point me in a direction?
I will be... (2 Replies)
Hi,
I want to calculate diff b/w these starttime and endtime with use of mktime. I need response time in milisecond. I am using mktime to get these times. last three digits are in milisecond
Starttime 2013-04-03 08:54:19,989
End time 2013-04-03 08:54:39,389 (9 Replies)
So, I do some file processing that generates very large numbers, such as total amount GETted from a busy web cluster in a month, etc. Mawk is awesome-- fast and easy. It's awk! But, there's a fatal flaw that I'd like to overcome. Apparently, %d maxes out at 2147483647. Here's sample output,... (11 Replies)
I'm trying to use AWK to filter on some dates in a field by converting them to Unix Time.
mktime(strftime(format,"6-FEB-2013 08:50:03.841")What is the proper format for my date strings as they appear in my database?
My first thought is %d-%b-%Y %H:%M:%Sbut I see the following issues:
%d is... (3 Replies)
Discussion started by: Michael Stora
3 Replies
LEARN ABOUT BSD
strftime
STRFTIME(3) Library Functions Manual STRFTIME(3)NAME
strftime - format date and time
SYNOPSIS
#include <sys/types.h>
#include <time.h>
#include <string.h>
size_t strftime(buf, maxsize, format, timeptr)
char *buf;
size_t maxsize;
char *format;
struct tm *timeptr;
DESCRIPTION
The strftime() function formats the information from timeptr into the buffer buf according to the string pointed to by format.
The format string consists of zero or more conversion specifications and ordinary characters. All ordinary characters are copied directly
into the buffer. A conversion specification consists of a percent sign ``%'' and one other character.
No more than maxsize characters will be placed into the array. If the total number of resulting characters, including the terminating null
character, is not more than maxsize, strftime() returns the number of characters in the array, not counting the terminating null. Other-
wise, zero is returned.
Each conversion specification is replaced by the characters as follows which are then copied into the buffer.
%A is replaced by the full weekday name.
%a is replaced by the abbreviated weekday name, where the abbreviation is the first three characters.
%B is replaced by the full month name.
%b or %h
is replaced by the abbreviated month name, where the abbreviation is the first three characters.
%C is equivalent to ``%a %b %e %H:%M:%S %Y'' (the format produced by asctime(3)).
%c is equivalent to ``%m/%d/%y''.
%D is replaced by the date in the format ``mm/dd/yy''.
%d is replaced by the day of the month as a decimal number (01-31).
%e is replaced by the day of month as a decimal number (1-31); single digits are preceded by a blank.
%H is replaced by the hour (24-hour clock) as a decimal number (00-23).
%I is replaced by the hour (12-hour clock) as a decimal number (01-12).
%j is replaced by the day of the year as a decimal number (001-366).
%k is replaced by the hour (24-hour clock) as a decimal number (0-23); single digits are preceded by a blank.
%l is replaced by the hour (12-hour clock) as a decimal number (1-12); single digits are preceded by a blank.
%M is replaced by the minute as a decimal number (00-59).
%m is replaced by the month as a decimal number (01-12).
%n is replaced by a newline.
%p is replaced by either ``AM'' or ``PM'' as appropriate.
%R is equivalent to ``%H:%M''
%r is equivalent to ``%I:%M:%S %p'' .
%t is replaced by a tab.
%S is replaced by the second as a decimal number (00-60).
%T or %X
is equivalent to "%H:%M:%S" .
%U is replaced by the week number of the year (Sunday as the first day of the week) as a decimal number (00-53).
%W is replaced by the week number of the year (Monday as the first day of the week) as a decimal number (00-53).
%w is replaced by the weekday (Sunday as the first day of the week) as a decimal number (0-6).
%x is equivalent to ``%m/%d/%y %H:%M:%S'' .
%Y is replaced by the year with century as a decimal number.
%y is replaced by the year without century as a decimal number (00-99).
%Z is replaced by the time zone name.
%% is replaced by `%' .
SEE ALSO date(1), ctime(3), printf(1), printf(3)STANDARDS
The strftime() function conforms to ANSI X C3.159-1989(``ANSI C'').
BUGS
There is no conversion specification for the phase of the moon.
4.2 Berkeley Distribution April 1, 1995 STRFTIME(3)