client /server pipes Post: 302228297

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Top Forums Programming client /server pipes Post 302228297 by redoubtable on Saturday 23rd of August 2008 07:59:50 PM

08-23-2008

Registered User

Wow! That's some ugly code you got there. Here's the working version:

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define maxsize 1000

char buffer [maxsize];
void client(int readfd,int writefd)
{
   printf ("give pathname: ");
   fflush (stdout);
   fgets (buffer, sizeof (buffer), stdin);

   write(writefd,buffer, sizeof (buffer));
   while (read(readfd,buffer,sizeof(buffer)) > 0)
        printf("%s",buffer);
}

void server(int readfd,int writefd)
{
   FILE * fp;
   char line[1000];

   read(readfd,buffer,sizeof(buffer));
   if (strchr (buffer, '\n'))
        *strchr(buffer, '\n') = '\0';
   fp=fopen(buffer,"r");
   if(fp==NULL)
   {
       strcpy(buffer,"cannot open file");
       write(writefd,buffer,strlen(buffer));
   }
   else
     while(fgets(line,sizeof(line),fp)!=NULL)
       write(writefd,line,sizeof(line));
}

int main()
{
    int pipe1[2],pipe2[2];
    int childpid;
    int status;
    pipe(pipe1);
    pipe(pipe2);
    childpid=fork();
    if(childpid>0)
    {
        close(pipe1[0]);
        close(pipe2[1]);
        client(pipe2[0],pipe1[1]);
        wait(&status);
        exit(0);
    }
    else
    {
        close(pipe1[1]);
        close(pipe2[0]);
        server(pipe1[0],pipe2[1]);
        exit(0);
    }

}

There were several things wrong. Diff to find mistakes.

Hope it helps!

redoubtable

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LEARN ABOUT OPENSOLARIS

vino-server

vino-server(1)							   User Commands						    vino-server(1)

NAME

       vino-server - remote desktop server

SYNOPSIS

       vino-server

DESCRIPTION

       vino-server  is	a remote desktop server based on VNC protocol.	vino-server provides remote desktop takeover and remote desktop view func-
       tions. vino-server allows multiple client to access a GNOME desktop session remotely. It is based on the VNC technology.  vino-server  pro-
       vides  service at port 5800. Each desktop has a vino server which disabled by default and a Java client application which is made available
       to a client via a web browser (via port 5900 of the server machine is the service is enabled by the user).

FILES

       The following files are used by this application:

	    /usr/lib/vino-server

	    The executable file for the vino server application.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-remote-desktop	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Volatile			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       vino-passwd(1), vino-preferences(1), attributes(5)

NOTES

       Written by Steven Zhang, Sun Microsystems Inc., 2006.

       Updated by Halton Huo, Sun Microsystems Inc., 2008.

SunOS 5.11							    15 Aug 2008 						    vino-server(1)