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Full Discussion: Delete a row from a file if one column containing a date is greater than the current system date
Top Forums UNIX for Dummies Questions & Answers Delete a row from a file if one column containing a date is greater than the current system date Post 302536575 by chumsky on Tuesday 5th of July 2011 10:54:17 PM
Old 07-05-2011
Delete a row from a file if one column containing a date is greater than the current system date
Hello gurus,

I am hoping someone can help me with the required code/script to make this work. I have the following file with records starting at line 4:
Code:
NETW~US60~000000000013220694~002~~IT~USD~2.24~20110201~99991231~01~01~20101104~
NETW~US60~000000000013220694~003~~IT~USD~2.23~20110201~99991231~01~01~20111104~
NETW~US60~000000000013234445~001~~IT~USD~0.33~20090107~99991231~01~01~~

Logic would be:

1. Start reading line @ Row 4.
2. Check the date of the last column.
3. If date > current date, delete line
3. If there is no date, retain line

So from the example above, the record in the middle should be deleted from the file, thus retaining the 1st and 3rd lines.

Much appreciated!
Chumsky
Last edited by Franklin52; 07-06-2011 at 04:18 AM.. Reason: Please use code tags for code and data samples, thank you
 

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LEARN ABOUT OPENSOLARIS

wtmpfix

fwtmp(1M)						  System Administration Commands						 fwtmp(1M)

NAME

       fwtmp, wtmpfix - manipulate connect accounting records

SYNOPSIS

       /usr/lib/acct/fwtmp [-ic]

       /usr/lib/acct/wtmpfix [file]...

DESCRIPTION

       fwtmp  reads  from  the	standard input and writes to the standard output, converting binary records of the type found in /var/adm/wtmpx to
       formatted ASCII records. The ASCII version is useful when it is necessary to edit  bad records.

       wtmpfix examines the standard input or named files in utmpx format, corrects the time/date stamps  to  make  the  entries  consistent,  and
       writes  to  the standard output. A hyphen (-) can be used in place of file to indicate the standard input. If time/date corrections are not
       performed, acctcon(1M) will fault when it encounters certain date-change records.

       Each time the date is set, a pair of date change records are written to /var/adm/wtmpx. The first record is the old  date  denoted  by  the
       string  "old time" placed in the line field and the flag OLD_TIME placed in the type field of the utmpx structure. The second record speci-
       fies the new date and is denoted by the string new time placed in the line field and the flag NEW_TIME placed in the  type  field.  wtmpfix
       uses these records to synchronize all time stamps in the file.

       In addition to correcting time/date stamps, wtmpfix will check the validity of the name field to ensure that it consists solely of alphanu-
       meric characters or spaces. If it encounters a name that is considered invalid, it will change the login name to INVALID and write a  diag-
       nostic to the standard error. In this way, wtmpfix reduces the chance that acctcon will fail when processing connect accounting records.

OPTIONS

       -ic    Denotes that input is in ASCII form, and output is to be written in binary form.

FILES

       /var/adm/wtmpx	 history of user access and administration information

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWaccu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       acctcom(1),  ed(1),  acct(1M),  acctcms(1M),  acctcon(1M),  acctmerg(1M),  acctprc(1M),	acctsh(1M),  runacct(1M),  acct(2), acct.h(3HEAD),
       utmpx(4), attributes(5)

SunOS 5.11							    22 Feb 1999 							 fwtmp(1M)
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