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Top Forums Shell Programming and Scripting Question related to bash. Your help needed. Post 302981619 by Corona688 on Thursday 15th of September 2016 06:22:04 PM
Old 09-15-2016
Quote:
Originally Posted by protos27
Thanks, but what when i want to put "load" data from data.txt instad of keyword like LIKE???? I mean for example for $i in "here i will put name of the file etc" is that possible?
What you are asking for is a very persistently repeated beginner shell programming mistake called "Dangerous Backticks".

Quote:
(From the URL above)

A special idiom to pay attention to, because it's basically always wrong, is this:

Code:
    	for f in `cat file`; do
    	    ...
    	done

Apart from the classical Useless Use of Cat here, the backticks are outright dangerous, unless you know the result of the backticks is going to be less than or equal to how long a command line your shell can accept. (Actually, this is a kernel limitation. The constant ARG_MAX in your limits.h should tell you how much your own system can take. POSIX requires ARG_MAX to be at least 4,096 bytes.)
It wastes time, memory, external calls, and subshells to slowly and unreliably almost do what you wanted. The read shell builtin actually reads lines, running externals in backticks do not -- they split on any spaces at all.
 

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URI::URL(3)						User Contributed Perl Documentation					       URI::URL(3)

NAME
URI::URL - Uniform Resource Locators SYNOPSIS
$u1 = URI::URL->new($str, $base); $u2 = $u1->abs; DESCRIPTION
This module is provided for backwards compatibility with modules that depend on the interface provided by the "URI::URL" class that used to be distributed with the libwww-perl library. The following differences compared to the "URI" class interface exist: o The URI::URL module exports the url() function as an alternate constructor interface. o The constructor takes an optional $base argument. The "URI::URL" class is a subclasses of "URI::WithBase". o The URI::URL->newlocal class method is the same as URI::file->new_abs o URI::URL::strict(1) o $url->print_on method o $url->crack method o $url->full_path; same as ($uri->abs_path || "/") o $url->netloc; same as $uri->authority o $url->epath, $url->equery; same as $uri->path, $uri->query o $url->path and $url->query pass unescaped strings. o $url->path_components; same as $uri->path_segments (if you don't consider path segment parameters). o $url->params and $url->eparams methods. o $url->base method. See URI::WithBase. o $url->abs and $url->rel have an optional $base argument. See URI::WithBase. o $url->frag; same as $uri->fragment o $url->keywords; same as $uri->query_keywords; o $url->localpath with friends map to $uri->file o $url->address and $url->encoded822addr; same as $uri->to for mailto URI. o $url->groupart method for news URI. o $url->article; same as $uri->message SEE ALSO
URI, URI::WithBase COPYRIGHT
Copyright 1998-2000 Gisle Aas. perl v5.8.0 2002-05-09 URI::URL(3)
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