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Top Forums Shell Programming and Scripting Help with 56kbit Modem Scripting Post 302999895 by Corona688 on Thursday 29th of June 2017 11:41:22 AM
Old 06-29-2017
Stumbled across an old thread I posted in involving modems. Instead of grepping a logfile, you can set timeouts via stty.

Code:
#!/bin/bash

MODEM="/dev/ttyS3"

function get_response
{
        local ECHO
        # cat will read the response, then die on timeout
        cat <&5 >$TMP &
        echo "$1" >&5
        # wait for cat to die
        wait $!

        exec 6<$TMP
        read ECHO <&6
        if [ "$ECHO" != "$1" ]
        then
                exec 6<&-
                return 1
        fi

        read ECHO <&6
        read RESPONSE <&6
        exec 6<&-
        return 0
}

TMP="./response"

# Clear out old response
: > $TMP

# Set modem with timeout of 5/10 a second
stty -F "$MODEM" 9600 -echo igncr -icanon onlcr ixon min 0 time 5

# Open modem on FD 5
exec 5<>"$MODEM"

get_response "AT+CGMI" || echo "Bad response"
echo "Response was '${RESPONSE}'"       ;       cat $TMP

echo

get_response "AT" || echo "Bad response"
echo "Response was '${RESPONSE}'"       ;       cat $TMP

exec 5<&-

 

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Arch::LiteWeb(3pm)					User Contributed Perl Documentation					Arch::LiteWeb(3pm)

NAME
Arch::LiteWeb - simple way to access web pages SYNOPSIS
my $web = Arch::LiteWeb->new; my $content = $web->get("http://some.domain:81/some/path"); die $web->error . " while processing " . $web->request_url unless $content; my $content_type = $web->response_headers->{content_type}; DESCRIPTION
This class provides a basic and easy to use support for the client-side HTTP. It is supplied in order to avoid dependency on LWP. If such dependency is not a problem, consider to use LWP instead that provides much better support for HTTP and other protocols. METHODS
The following class methods are available: get, post, request_url, error, error_with_url, network_error, response_code, response_codestr, response_error, response_headers, response_content. get url [params ...] Execute HTTP get of the given url and return the html string or undef on network/response error. Use other methods to get the details about the error and the response. params is key-value hash, the following keys are supported: url_host - only used if url is none url_port - only used if url is none(80) url_path - only used if url is none endl - default is "1512" timeout - default is 20 seconds user_agent - default is "Arch::LiteWeb/0.1" nocache - add a no-cache header noredirect - don't follow redirect responses max_redirect_depth - default is 5 use_proxy - default is false proxy_url - proxy url ($http_proxy supported too) proxy_host - only used if proxy_url is none proxy_port - only used if proxy_url is none(80) post url input [params] Not implemented yet. request_url Actual url of the last issued request or undef. If partial redirect responses are enabled, then the result is the last (non-redirect) url. error If the last request resulted in error (i.e. get/post returned undef), then this method returns the error message, otherwise it returns undef. This is just a shortcut for network_error || response_error. error_with_url Like error, but with " while fetching request_url " text appended if non undef. network_error The network error message for the last request or undef. response_error The response error message for the last request or undef. response_code The last response code (integer) or undef. response_codestr The last response code (string) or undef. response_headers The last response headers (hashref of HTTP headers) or undef. response_content The last response content or undef. This is the same thing that the last get/post returns. BUGS
Not intended for use in mission-critical applications. AUTHORS
Mikhael Goikhman (migo@homemail.com--Perl-GPL/arch-perl--devel). SEE ALSO
For more information, see LWP, LWP::Simple. perl v5.10.1 2005-03-25 Arch::LiteWeb(3pm)
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