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Full Discussion: How to create file and file content based existing information?
Top Forums Shell Programming and Scripting How to create file and file content based existing information? Post 302994015 by RudiC on Friday 17th of March 2017 12:33:08 PM
Old 03-17-2017
With just glance at your script I see that
- both input files being read via what seems to be the same file descriptor - might work by accident but is sloppy programming; use different fd explicitly
- if it would work, for every line in file1 the entire file2 is being read - highly inefficient
- every time fname is found in the input files, its hitherto existing contents will be overwritten - mayhap undesired
Last edited by RudiC; 03-17-2017 at 01:50 PM..
 

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LEARN ABOUT MINIX

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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