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Full Discussion: A Basic example of socket programming in C
Special Forums IP Networking A Basic example of socket programming in C Post 302999394 by Corona688 on Monday 19th of June 2017 11:03:06 AM
Old 06-19-2017
It sends humidity, temperature, and light as one line because you read from all three:

Code:
 while ((fgets(line1, MAXLINE, pF_temperature) != NULL) &&
        (fgets(line2, MAXLINE, pF_light) != NULL) &&
        (fgets(line3, MAXLINE, pF_humidity) != NULL))

...then remove newlines from all three:
Code:
    line1[strcspn(line1, "\r\n")] = 0;        //remove newline
    line2[strcspn(line2, "\r\n")] = 0;        //remove newline
    line3[strcspn(line3, "\r\n")] = 0;        //remove newline

...then concatenate all three with labels and tabs inbetween:

Code:
    strcat(sendline, "TEMPERATURE = ");
    strcat(sendline, line1);

    strcat(sendline, "\tLIGHT = ");
    strcat(sendline, line2);

    strcat(sendline, "\tHUMIDITY = ");
    strcat(sendline, line3);

Then send all three:

Code:
send(sockfd, sendline, strlen(sendline), 0);

You are not using my code at all.
Last edited by Corona688; 06-19-2017 at 12:13 PM..
 

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LEARN ABOUT DEBIAN

efax-gtk-socket-client

efax-gtk-socket-client(1)				      General Commands Manual					 efax-gtk-socket-client(1)

NAME

       efax-gtk-socket-client - a client of efax-gtk to work with lpd/lprng

SYNOPSIS

       efax-gtk-socket-client [hostname] [port]

DESCRIPTION

       This program enables lpd/lprng to access the efax-gtk socket server. Meaning the user can send faxes to a printer, which will ack as a fax.

       It  takes  two arguments - first a hostname to connect to, and secondly a port number at that hostname to connect to.  All efax-gtk-socket-
       client does is to read from standard input (in this case from lpd/lprng) and passes it to a socket at the hostname and port  number  passed
       as arguments to it (namely the hostname of the computer efax-gtk is running on - normally you would specify localhost - and the port number
       of the socket).

       fax:
	    :sd=/var/spool/fax:
	    :mx#0:
	    :sh:
	    :lp=/dev/null:
	    :if=/var/spool/fax/efax-gtk-faxfilter:

       This will cause a printer by the name of "fax" to be available, which (if printed to) will send the file to the efax-gtk socket server.	If
       you  set  efax-gtk  to  listen on a port other than port 9900, you will need to amend the file /var/spool/fax/efax-gtk-faxfilter by hand to
       specify the correct port number on which efax-gtk is listening.

       Don't forget to restart the lpd printer daemon after amending /etc/printcap.

OPTIONS

       [ hostname ] - The name of the host to listen to. Usually should be locahlhost.
       [ port ] - the port number to listen to on the [ hostname ].

SEE ALSO

       efax(1), efax-gtk(1).

AUTHOR

       efax-gtk-socket-client was written by  Chris Vine <chris@cvine.freeserve.co.uk>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								   July 18, 2006					 efax-gtk-socket-client(1)
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