Adding time to date time in UNIX shell scipting Post: 302738875

Sponsored Content

Top Forums Shell Programming and Scripting Adding time to date time in UNIX shell scipting Post 302738875 by cfajohnson on Monday 3rd of December 2012 04:31:02 AM

12-03-2012

Registered User

Brad, the %s format to date is not standard. GNU and [Free|Net]BSD have it, other variants might not.

These bash functions I just wrote do time arithmetic:

Code:

time2seconds() #@ Calculate no. of seconds from [H]H:[M]M:[S]S result_var
{
  local s hours minutes seconds var IFS=:
  set -- $*
  hours=${1#0}
  minutes=${2#0}
  seconds=${3#0}
  var=${4:-_t2s}
  s=$(( hours * 3600 + minutes * 60 + seconds ))
  printf -v "$var" "%d" "$s"
}

seconds2time() #@ Convert number of seconds to [DAYS ]HH:MM:SS
{
  local s days hours minutes seconds var
  s=$1
  var=${2:-_s2t}
  seconds=$(( s % 60 ))
  hours=$(( s / 3600 ))
  minutes=$(( (s - hours * 3600) / 60 ))

  if [ $hours -gt 24 ]
  then
    days=$(( hours / 24 ))
    hours=$(( hours % 24 ))
  fi

  printf -v "$var" "%s%02d:%02d:%02d" ${days:+"$days "} "$hours" "$minutes" "$seconds"
}

addseconds() #@ To HH:MM:SS add SECS
{
  local time=$1 secs=$2
  time2seconds "$time"
  seconds2time "$(( _t2s + secs ))"
}

They can be combined with the date functions from The Dating Game to solve your problem.

cfajohnson

View Public Profile for cfajohnson

Find all posts by cfajohnson

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

problem with displaying date and adding time

Hi, I have a log file with contents like 81.49.74.131 - - 81.49.74.131 - - 116.112.52.31 - - 116.112.52.31 - - I need an output like this 81.49.74.131 14/Sep/2008 Time duration: 00:06:00 116.112.52.31 15/Sep/2008 Time duration: 00:00:01 Please anyone suggest a script for this....

2. UNIX for Dummies Questions & Answers

Adding date and time to a log file

Morning all Im hoping you can help me. We have a nice new oracle server :( and are needing to move some files around for EDI and BACS. The server runs windows but has an app called MKS toolkit installed which give unix commands. (Needed for the oracle stuff) I have had a go using dos commands...

3. Shell Programming and Scripting

Convert Epoch Time to Standard Date and Time & Vice Versa

Hi guys, I know that this topic has been discuss numerous times, and I have search the net and this forum for it. However, non able to address the problem I faced so far. I am on Solaris Platform and unable to install additional packages like the GNU date and gawk to make use of their...

4. UNIX for Dummies Questions & Answers

Adding Date & time stamps to filename

I need to edit the file name with date and time while writing the script. please help.

5. Shell Programming and Scripting

Adding date and time to file name

Hi All, i wanted to add date and time to the file names in the same directory so lets say a file in the directory is test.txt then after running the shell script it should be test-15-11-2010.txt. So I used the following script which works, #!/bin/bash thetime=`date +%Y-%m-%d--%H:%M:%S`...

6. UNIX for Dummies Questions & Answers

Converting string date time to unix time in AWK

I'd like to convert a date string in the form of sun aug 19 09:03:10 EDT 2012, to unixtime timestamp using awk. I tried This is how each line of the file looks like, different date and time in this format Sun Aug 19 08:33:45 EDT 2012, user1(108.6.217.236) all: test on the 17th ...

7. UNIX for Dummies Questions & Answers

Adding hours and minutes to current date (Only to date not to time)

Hi, I want to add some hours and minutes to the current date. For example, if the current date is "July 16, 2012 15:20", i want to add 5 hours 30 minutes to "July 16, 2012 00:00" not to "July 16, 2012 15:20". Please help. Thanks!

8. Solaris

modifying date and time and time zone on solaris 5.10 with (redundant server) veritas

I have a cluster of two Solaris server (veritas cluster). one working and the other is standby I am going to change the date on them , and am looking for a secure solution as it is giving an important service. my opinion is that the active one doesn't need to be restarted (if I don't change the...

9. Shell Programming and Scripting

Adding Seconds to UNIX/Epoch-Time

Hello All, I have a Perl script I'm writing where I ask the user to enter a "start time" for something. The "$start_time" will be in the format of: # The Time CLI Option Can be in the format of: --start-time="1day" --start-time="2hours" --start-time="45min" ...

10. Shell Programming and Scripting

Date time difference in UNIX shell script

There are 2 dates, Tue Oct 1 13:40:19 2013 Sun Sept 30 10:26:23 2013 I have multiple dates like the above one. How do I calculate the date time difference and display in another column in Shell script. Please help.

LEARN ABOUT DEBIAN

stwritetime

sttime(3)						    ShapeTools Toolkit Library							 sttime(3)

NAME

       stMktime, stWriteTime - date and time handling

SYNOPSIS

       #include <config.h>
       #include <sttk.h.h>

       time_tstMktime (char *string);

       char*stWriteTime (time_t date);

DESCRIPTION

       stMktime scans the given string and tries to read a date and time from it. It understands various formats of date strings. The following is
       a list of all valid formats, optional parts in brackets.

       [Tue] Jan 5[,] [19]93
		     This includes the standard asctime(3) format.

       Jan 5	     With no year given, the year defaults to the current year.

       [19]93/01/05  This notation requires month and day represented by exactly two digits.

       5.1.[19]93    This is the usual German notation.

       5.1.	     German notation referencing the current year.

       A certain time, given together with the date must always have the following form.

       hours:minutes[:seconds]
		       Each of the fields must be an integer value within the proper range (hours: 0-23, minutes and seconds: 0-59). Values  below
		       10 may be written as one digit numbers.

       The  time  value  may be placed anywhere in the date string: at the beginning, at the end, or somewhere in the middle. Any amount of white-
       space may be given between a field of the time value and the separating colon. The time is always considered to be local time.

       stWriteTime generates a time string similar to asctime(3) from its date argument.

SEE ALSO

       asctime(3)

BUGS

       Time Zone Names within the time string (like `MET') are not handled properly. In most cases they will cause a failure.

sttk-1.7						     Thu Jun 24 17:43:35 1993							 sttime(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

problem with displaying date and adding time

Discussion started by: FuncMx

2. UNIX for Dummies Questions & Answers

Adding date and time to a log file

Discussion started by: ltodd2

3. Shell Programming and Scripting

Convert Epoch Time to Standard Date and Time & Vice Versa

Discussion started by: DrivesMeCrazy

4. UNIX for Dummies Questions & Answers

Adding Date & time stamps to filename

Discussion started by: manish.s