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Full Discussion: Loop Mania
Top Forums Shell Programming and Scripting Loop Mania Post 302179906 by era on Saturday 29th of March 2008 03:17:17 AM
Old 03-29-2008
If I were you I would take away the interactive features, but then you would end up with basically just grep anyway.

You really really must quote user-supplied input variables. Somebody could type `rm -rf $HOME` with the backticks at your prompt and then blame you for the consequences.

You are planning to not ever have a user named "exit" then? Perhaps empty input should be used to quit, instead.

You have the grep function twice. I would refactor so the grepping is in a function and the flow control is the main body of the script.

The actual problem is that you have a dollar sign in front of the variable in the read inside the function.

Hope this helps.
 

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XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME
xzgrep - search compressed files for a regular expression SYNOPSIS
xzgrep [grep_options] [-e] pattern file... xzegrep ... xzfgrep ... lzgrep ... lzegrep ... lzfgrep ... DESCRIPTION
xzgrep invokes grep(1) on files which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1). All options specified are passed directly to grep(1). If no file is specified, then standard input is decompressed if necessary and fed to grep(1). When reading from standard input, gzip(1) and bzip2(1) compressed files are not supported. If xzgrep is invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1). The same applies to names lzgrep, lze- grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils. ENVIRONMENT
GREP If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1). SEE ALSO
grep(1), xz(1), gzip(1), bzip2(1), zgrep(1) Tukaani 2010-09-27 XZGREP(1)
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