Any idea how to get it to display the number line it's on? I thought of adding a counting integer variable to the code which would increment "++" if it finds a match, but not sure if that would work right? I also would like to swap the case switch for an if loop so I can keep the shell sort function in the same shell (and not have to call a second shell), unless you know how I can put multiple lines of code in a case switch (not just one thing; I've tried to put multiple lines in a case but cannot get that to work right)?
You already put the content lines of the file into an array, so you can use the array index to display the line number. Using an extra counter is not necessary. Please see the comments in the code below.
Last edited by MacMonster; 10-25-2011 at 12:18 AM..
Reason: Add some comments
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Discussion started by: Samah
1 Replies
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)