Closest I can get quickly:
For sth. more refined you might need an awk (or equivalent) solution.
Rudi thanks.
your command works fine but as both files are huge grep fails i think.
can you give me something equivalent in awk?
---------- Post updated at 10:04 PM ---------- Previous update was at 09:58 PM ----------
Quote:
Originally Posted by vgersh99
a bit verbose, but....
i think awk is the solution as both files are huge but ah.awk you gave doesnt work..the script just keeps running.no output.
can you check if there is any error in the codes please?
---------- Post updated at 10:22 PM ---------- Previous update was at 10:04 PM ----------
for my ah.awk i tried adding #! /usr/bin/awk -f in the top line.
still didnt work.
thanks guys for helping.
---------- Post updated at 10:30 PM ---------- Previous update was at 10:22 PM ----------
i think the issue here is not grep.
i think the while read line doesnt work for big files.
how do i replace it with awk?
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Discussion started by: arch
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LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)