Thread: Timing programs

Ok. I read the FAQ, but it was fairly vague. I'm trying to create a program that will run until the user inputs 'x'. So this is how I tried to implement it. I also used Salems suggestions on how to pass info from the file into an array to establish my socket. Mind checking over my code and telling me where I should improve on it? I'm used to MUD code, and a lot of this stuff is already in there.

Code:

#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

extern int errno;
extern int h_errno;
typedef struct  config_data	CONFIG_DATA;

struct config_data
{
  	char *host;
  	int port;
  	char *path;
};

void load_config( void )
{
	FILE_DATA * fp;
	CONFIG_DATA *cData;
	int cnt;
	char buffer[5000];

	if (( fp = fopen("config.txt", "rb" )) == NULL )
	{
		perror("no config found.");
	    return 0;
  	}

  	for ( cnt = 0; cnt < 3; cnt++ )
  	{
		while ( buffer = fgetc( fp ) ) != EOF )
		{
			cData->host = str_dup( buffer );
			cData->port = str_dup( buffer );
			cData->path = str_dup( buffer );
		}
	}
}

void check_server( void )
{
	char                 buffer[4096];
    struct hostent      *hostaddr;
    int                  port;
    struct protoent     *protocol;
    int                  rval;
    int                  sd;
    struct sockaddr_in   socketaddr;
    CONFIG_DATA * cData;

    if ( argc[0] != '\0' )
    {
      printf( "no arguments needed.\n" );
      return (EINVAL); /* Invalid argument */
    }

    /* quick sanity check */

    port = atoi( cData->port )

    if ( port < 1 || port > 65535 )
    {
      printf( "client: invalid port number\n" );
      return (EINVAL);
    }

    /*
     * Build our socket
     */

    protocol = getprotobyname( "tcp" );
    if ( !protocol )
    {
      perror( "getprotobyname()" );
      return (errno);
    }

    sd = socket( PF_INET, SOCK_STREAM, 0 );
    if ( sd == -1 )
    {
      perror( "socket()" );
      return (errno);
    }

    /*
     * Setup info about the remote host
     */

    memset( &socketaddr, 0, sizeof(socketaddr) );

    socketaddr.sin_family = AF_INET;
    socketaddr.sin_port = htons( port );

    hostaddr = gethostbyname( cData->host );

    if ( !hostaddr )
    {
      fprintf( stderr, "gethostbyname(): %s\n", hstrerror(h_errno) );
      return (h_errno);
    }

    /* copy address from hostaddr to socketaddr */

    memcpy( &socketaddr.sin_addr, hostaddr->h_addr, hostaddr->h_length );

    /*
     * Connect to the host
     */

    rval = connect( sd, (struct sockaddr *) &socketaddr, sizeof(socketaddr) );

	if ( rval == -1 ) // Servers down, boot it
    {

		spawnv( P_WAIT, cData->path, argv[0] );
		close( sd );
    	return (0);
  	}else{

	close( sd );
	return (0);
}

int main ( int argc, char * argv[])
{
	clock_t timer;


	load_config( void );

	timer = time( );

	while ( argv[0] != 'x' )
	{
		if ( timer == 300 )
		{
			puts("Checking server.");
			check_server( void );
			timer = 0;
			timer = time( );
		}
	}
}