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Full Discussion: Process selected lines
Top Forums Shell Programming and Scripting Process selected lines Post 302398646 by derekphl on Thursday 25th of February 2010 06:51:40 AM
Old 02-25-2010
Process selected lines

I have an if statement where I state that if there are more than one records (lines) found containing a string in a file, then it enters into a while loop to use each line for as many lines as there are and then stop.

Trouble is, I can't figure out how to move to the next instance of each line. I would have thought sed or awk would happily (and easily) have a solution for it, but it seems that is not the case. So far example:

1,record one,data0
2,record two,data0
3,record three,data1

In the case above, I search for "data1", and find only one record so I use and move on. But if I search for data0, then I need firstly to use the first line found containing data0 which could be anywhere and not on any specific line number, then loop back to use the second in the same way within the while loop. How do I move to the second is what I can't figure out?

Thanks
Derek.
 

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ANACRONTAB(5)						       Anacron Users' Manual						     ANACRONTAB(5)

NAME
/etc/anacrontab - configuration file for anacron DESCRIPTION
The file /etc/anacrontab describes the jobs controlled by anacron(8). Its lines can be of three kinds: job-description lines, environment assignments, or empty lines. Job-description lines are of one of these two forms: period delay job-identifier command @period_name delay job-identify command The period is specified in days, the delay in minutes. The job-identifier can contain any non-blank character, except slashes. It is used to identify the job in Anacron messages, and as the name for the job's timestamp file. The command can be any shell command. The fields can be separated by blank spaces or tabs. The period_name can only be set to monthly at the present time. This will ensure jobs are only run once a month, no matter the number of days in this month, or the previous month. Environment assignment lines are of the form: VAR = VALUE Spaces around VAR are removed. No spaces around VALUE are allowed (unless you want them to be part of the value). The assignment takes effect from the next line to the end of the file, or to the next assignment of the same variable. Empty lines are either blank lines, line containing white-space only, or lines with white-space followed by a '#' followed by an arbitrary comment. You can continue a line onto the next line by ending it with a ''. SEE ALSO
anacron(8) The Anacron README file. AUTHOR
Itai Tzur <itzur@actcom.co.il> Currently maintained by Pascal Hakim <pasc@(debian.org|redellipse.net)>. Pascal Hakim 2004-07-11 ANACRONTAB(5)
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