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Top Forums UNIX for Dummies Questions & Answers File and if statement comparisons Post 302798101 by mistsong1 on Tuesday 23rd of April 2013 08:21:43 PM
Old 04-23-2013
Quote:
Originally Posted by mjf
Sticking with your framework, here is one possible solution which uses awk to reformat all fields after first column on a line of its own and then grep to check if a match(untested):

Code:
list=`ls`
awk -F: '{for(i=2;i<=NF;i++) {printf $i"\n"}}' readme > matchfile
for f in $list
do
  grep $f matchfile
  if [ $? -eq 0 ]; then
    echo 'found match......' $f
  fi
done

Can you explain to me what the line
Code:
if [ $? -eq 0 ]

means? I'm still fairly new with unix and there's so much to learn in like everything, but from my current understanding it's saying "if....something(don't know what that is) is equal to zero then it finds a match"?
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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