Sponsored Content
Top Forums Shell Programming and Scripting Redirection after prepending timestamp Post 302503409 by MacAonghusa on Thursday 10th of March 2011 12:11:53 PM
Old 03-10-2011
Redirection after prepending timestamp

Hi all,
I have little experience with Scripting so hoping someone may be able to help me or point me in the right direction.
I have a shell script which was outputting uncaught exceptions to a log file.
$JAVA_MAIN_CLASS > $LOGNAME 2>&1

What I want to be able to do is prepend a timestamp on each entry to the log file. I updated the script as follows:
$JAVA_MAIN_CLASS | perl -pne 'print scalar(localtime()), " ";' > $LOGNAME 2>&1

But nothing gets outputted to the file until the process is terminated and at that there is information missing. It is hard to tell if it is standard out or standard error. I know the perl timestamp part works as I have tested. But its when I try to pipe it to the file I am doing something wrong. Smilie

If anyone has any ideas I would appreciate them.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Finding pattern & prepending a line with text

Hello Dudes, I have a task to make a unix shell script that should search for a specific TEXT in a file.If that TEXT is found, shell script should add a comment statement before that TEXT line. Ex : LINE 1 xxxxx LINE 2 xxxx CALL xxxx LINE 3 xxxx PERFORM UNTIL if i... (1 Reply)
Discussion started by: kirrushna
1 Replies

2. Shell Programming and Scripting

Conditionally prepending text

I am currently writing a script to compare a file list created over an FTP connection to a local directory. I have cleaned the FTP file list up so that I just have a raw list of filenames however due to the directory structure employed (both locally and on the ftp site) I need to prepend each line... (6 Replies)
Discussion started by: Dal
6 Replies

3. UNIX for Dummies Questions & Answers

Prepending information from filenames into files

I would like to know how to take information from a filename and place it into the text of the same file. Let's say I have a file called height_2_width_1.txt containing data that is related to a height of 2 and a width of 1, and the text originally looks like this: where these two columns... (13 Replies)
Discussion started by: Scatterbrain26
13 Replies

4. UNIX for Dummies Questions & Answers

How to compare a file by its timestamp and store in a different location whenever timestamp changes?

Hi All, I am new to unix programming. I am trying for a requirement and the requirement goes like this..... I have a test folder. Which tracks log files. After certain time, the log file is getting overwritten by another file (randomly as the time interval is not periodic). I need to preserve... (2 Replies)
Discussion started by: mailsara
2 Replies

5. UNIX for Dummies Questions & Answers

Prepending lines with file name

I have a number of dat-files, such as abc.dat, def.dat etc, as follows: 2011-07-01 100.0 2011-07-02 101.0 2011-07-03 101.7 I want to prepend the file with the base file name; so for abc.dat it would result in the following: abc 2011-07-01 100.0 abc 2011-07-02 101.0 abc 2011-07-03 ... (5 Replies)
Discussion started by: figaro
5 Replies

6. Shell Programming and Scripting

[Shell/Perl(?)] Prepending timestamps to console output & writing results to a file

I do a lot of TSM work and I embarked on what I thought would be an easy task, and I'd be very happy for any input to save the pounding my keyboard is receiving :] By default, the output of TSM's console has no timestamping, making it hard to sort through accurately. This puts my console into... (5 Replies)
Discussion started by: Vryali
5 Replies

7. Shell Programming and Scripting

Sed script for appending & prepending

Hello Mates I am trying to write a script, which appends and prepends the text in a file. I tried testing with a small file and it worked fine. but for the large file, the script is wiping the entire file and adds only the word to be appended in the file. mv $file_name $file_name.bak sed... (6 Replies)
Discussion started by: sathyaac
6 Replies

8. Shell Programming and Scripting

To check timestamp in logfile and display lines upto 3 hours before current timestamp

Hi Friends, I have the following logfile. Currently time in india is 07/31/2014 12:33:34 and i have the following content in logfile. I want to display only those entries which contain string 'Exception' within last 3 hours. In this case, it would be the last line only I can get the... (12 Replies)
Discussion started by: srkmish
12 Replies

9. Shell Programming and Scripting

AIX : Need to convert UNIX Timestamp to normal timestamp

Hello , I am working on AIX. I have to convert Unix timestamp to normal timestamp. Below is the file. The Unix timestamp will always be preceded by EFFECTIVE_TIME as first field as shown and there could be multiple EFFECTIVE_TIME in the file : 3.txt Contents of... (6 Replies)
Discussion started by: rahul2662
6 Replies

10. Shell Programming and Scripting

Grep lines between last hour timestamp and current timestamp

So basically I have a log file and each line in this log file starts with a timestamp: MON DD HH:MM:SS SEP 15 07:30:01 I need to grep all the lines between last hour timestamp and current timestamp. Then these lines will be moved to a tmp file from which I will grep for particular strings. ... (1 Reply)
Discussion started by: nms
1 Replies
ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
All times are GMT -4. The time now is 11:36 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy