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Full Discussion: read line
Top Forums Shell Programming and Scripting read line Post 302494223 by methyl on Sunday 6th of February 2011 09:27:28 AM
Old 02-06-2011
My interpretation of your post. Would help to see before and after samples and to mention what environment you have.
Incrementing $add may be different in your shell.

Code:
add=1
while read line
do
    prefix=`echo "${line}"|cut -c1-4`
    if [ "${prefix}""X" = "USER""X" ]
    then
          echo "${add} ${line}"
    else
          echo "${line}"
    fi
    add=`expr ${add} + 1`
done < filename >ft_tmp.log

I can see there being layout problems if this is the output from "ps" appended to a file because it will displace the heading across the screen.
 

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LEARN ABOUT REDHAT

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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