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"Default" Record Lengths

 
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Old 08-26-2001
Question "Default" Record Lengths
Hello -

QUESTION:
Is there a way to override the default record length limitation over awk in Unix?
Or, is there a better way to do what I am trying to do than the way I am trying to do it now? (See BACKGROUND and CURRENT PROCEDURE below...)

BACKGROUND:
In a Kornshell script, I have to search a file using variable criteria and produce a range of records from within the original input file. I am piping the file from Unix Kornshell commands to an awk procedure. I basically want to extract a range of records out of the original file, based on input criteria.

PROBLEM:
Awk is relaying to me that the record is too long to process.

CURRENT PROCEDURE:
To overcome the length problem, I am "cut"-ting the records as I pipe them to the awk procedure, and that is working OK - - I do get the expected output from the procedure.
But then I have to use a Unix "grep" with the output of the awk procedure against the original file to put the selected records from the file 'back together' with the original. Consequently, the "grep" is taking too long (it is an interactive script).
Is there a better way to do this?
- -
FYI:
The original records are a bit over 7000 bytes in length.
The "cut" records passed to and output from awk are 50 bytes.
- -
Thanks,
Jim
 
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LEARN ABOUT REDHAT

script

SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME

     script -- make typescript of terminal session

SYNOPSIS

     script [-a] [-f] [-q] [-t] [file]

DESCRIPTION

     Script makes a typescript of everything printed on your terminal.	It is useful for students who need a hardcopy record of an interactive
     session as proof of an assignment, as the typescript file can be printed out later with lpr(1).

     If the argument file is given, script saves all dialogue in file.	If no file name is given, the typescript is saved in the file typescript.

     Options:

     -a      Append the output to file or typescript, retaining the prior contents.

     -f      Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super-
	     vise real-time what is being done using `cat foo'.

     -q      Be quiet.

     -t      Output timeing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time
	     elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used
	     to replay typescripts with realistic typing and output delays.

     The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not
     set) for the C-shell, csh(1)).

     Certain interactive commands, such as vi(1), create garbage in the typescript file.  Script works best with commands that do not manipulate
     the screen, the results are meant to emulate a hardcopy terminal.

ENVIRONMENT

     The following environment variable is utilized by script:

     SHELL  If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most
	    shells set this variable automatically).

SEE ALSO

     csh(1) (for the history mechanism), replay(1).

HISTORY

     The script command appeared in 3.0BSD.

BUGS

     Script places everything in the log file, including linefeeds and backspaces.  This is not what the naive user expects.

Linux								   July 30, 2000							     Linux