Creating new file with new record length Post: 302216908

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Top Forums UNIX for Dummies Questions & Answers Creating new file with new record length Post 302216908 by drl on Monday 21st of July 2008 12:14:04 PM

07-21-2008

Registered User

Hi.

I assume that you mean line length when you speak of record length. Here is an example that takes a long line and breaks it into a few pieces:

Code:

#!/bin/bash -

# @(#) s1       Demonstrate feature of fold on long lines.

echo
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version =o $(_eat $0 $1) fold
set -o nounset
echo

FILE=${1-data1}

echo " Characteristics of data file $FILE:"
wc $FILE

echo
echo " Results of folding:"
fold -w 350 $FILE >t1
wc t1

echo
echo " Characteristics of first line:"
head -1 t1 | wc

echo
echo " Last few characters of file:"
od -Ad -bc t1 | tail -3

exit 0

Producing:

Code:

% ./s1

(Versions displayed with local utility "version")
Linux 2.6.11-x1
GNU bash 2.05b.0
fold (coreutils) 5.2.1

 Characteristics of data file data1:
   1    1 1002 data1

 Results of folding:
   3    3 1004 t1

 Characteristics of first line:
      1       1     351

 Last few characters of file:
0000992 163 061 060 060 163 065 066 067 070 071 060 012
          s   1   0   0   s   5   6   7   8   9   0  \n
0001004

See man fold for details -- you may wish to use -b for bytes ... cheers, drl

drl

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echo

ECHO(1) 								FSF								   ECHO(1)

NAME

       echo - display a line of text

SYNOPSIS

       echo [OPTION]... [STRING]...

DESCRIPTION

       NOTE:  your shell may have its own version of echo which will supercede the version described here. Please refer to your shell's documenta-
       tion for details about the options it supports.

       Echo the STRING(s) to standard output.

       -n     do not output the trailing newline

       -e     enable interpretation of the backslash-escaped characters listed below

       -E     disable interpretation of those sequences in STRINGs

       --help display this help and exit

       --version
	      output version information and exit

       Without -E, the following sequences are recognized and interpolated:

       NNN   the character whose ASCII code is NNN (octal)

       \     backslash

       a     alert (BEL)

            backspace

       c     suppress trailing newline

       f     form feed

       
     new line

       
     carriage return

       	     horizontal tab

       v     vertical tab

AUTHOR

       Written by FIXME unknown.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full documentation for echo is maintained as a Texinfo manual.  If the info and echo programs are properly installed at your site, the
       command

	      info echo

       should give you access to the complete manual.

GNU coreutils 4.5.3						   February 2003							   ECHO(1)

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