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Full Discussion: using the sed command with variable subsitution???
Top Forums Shell Programming and Scripting using the sed command with variable subsitution??? Post 40585 by anthreedhr on Thursday 18th of September 2003 11:26:44 AM
Old 09-18-2003
Tools using the sed command with variable subsitution???
how much do you know on using the sed commands within a diff command? I'm currently using one long command when robot runs that... when the diff command is ran that the < and > signs at the beginning of each line are changed to the environment name that they came from... making it easier to review...

diff $e1file $e2file | sed -e 's/^</$e1nm /1' -e 's/^>/$e2nm /1' > $dfnm

the variables above are... e1file is first file; e2file is the second environment code file; ^< will give me the < sign that is in the first position on a line; e1nm is subsitution value for first file;
e2nm is subsitution value for first file; dfnm is the name of the resulting diff file

The problem I'm having with this is that the subsitution part wants to change the < sign to "$e1nm" and not to say "file1" ... do anyone know how I can get a variable subsitution to work in this diff/sed command?
 

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LEARN ABOUT X11R4

zdiff

ZDIFF(1)						      General Commands Manual							  ZDIFF(1)

NAME

       zcmp, zdiff - compare compressed files

SYNOPSIS

       zcmp [ cmp_options ] file1 [ file2 ]
       zdiff [ diff_options ] file1 [ file2 ]

DESCRIPTION

       Zcmp  and  zdiff are used to invoke the cmp or the diff program on files compressed via gzip.  All options specified are passed directly to
       cmp or diff.  If only file1 is specified, it is compared to the uncompressed contents of file1.gz.  If two files are specified, their  con-
       tents  (uncompressed  if  necessary)  are  fed to cmp or diff.  The input files are not modified.  The exit status from cmp or diff is pre-
       served.

SEE ALSO

       cmp(1), diff(1), zmore(1), zgrep(1), znew(1), zforce(1), gzip(1), gzexe(1)

BUGS

       Messages from the cmp or diff programs may refer to file names such as "-" instead of to the file names specified.

																	  ZDIFF(1)
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