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Full Discussion: Running a diff on all pairs of arguments
Top Forums Shell Programming and Scripting Running a diff on all pairs of arguments Post 302887768 by wbport on Monday 10th of February 2014 05:43:08 PM
Old 02-10-2014
Running a diff on all pairs of arguments
I would like to create a loop and an inner loop to do a diff command on each pair of files passed as arguments. For example, if four files were on the command line, a diff would run on 1-2, 1-3, 1-4, 2-3, 2-4, & 3-4. Thus far I know the $# will give the count of the arguments and argv (instead of shift) would be used to refer to each argument, but I don't know how to define or modify variables which would be used as subscripts.

TIA
 

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LEARN ABOUT PLAN9

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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