c client for portageqd

portageq.c (text/plain), 1.77 KB, created by Daniel Lawson on 2004-12-21 03:18:26 UTC

/*
 ** client.c -- a stream socket client demo
 */

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


#define BUFSIZE 65536 // max number of bytes we can get at once 

#define BUFLEFT packetbuf + BUFSIZE - scan

char *hostname = "localhost";
short port = 21567;
int main(int argc, char *argv[])
{
	int sockfd, numbytes;  
	char buf[BUFSIZE];
	char *packetbuf = (char *)calloc(1,BUFSIZE);
	char *scan = packetbuf;
	struct hostent *he;
	struct sockaddr_in their_addr; // connector's address information 
	int i = 0;
	if (argc == 1) {
		fprintf(stderr,"usage: %s portageoption [parameter ... ]\n");
		exit(1);
	}

	if ((he=gethostbyname(hostname)) == NULL) {  // get the host info 
		perror("gethostbyname");
		exit(1);
	}

	if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
		perror("socket");
		exit(1);
	}

	their_addr.sin_family = AF_INET;    // host byte order 
	their_addr.sin_port = htons(port);  // short, network byte order 
	their_addr.sin_addr = *((struct in_addr *)he->h_addr);
	memset(&(their_addr.sin_zero), '\0', 8);  // zero the rest of the struct 

	if (connect(sockfd, (struct sockaddr *)&their_addr,
				sizeof(struct sockaddr)) == -1) {
		perror("connect");
		exit(1);
	}
	for (i = 1; i < argc; i++) {
		scan += snprintf(scan,BUFLEFT,"%s ",argv[i]);
	}
	if ((numbytes=send(sockfd, packetbuf, strlen(packetbuf),0)) == -1) {
		perror("send");
		exit(1);
	}
			
	if ((numbytes=recv(sockfd, buf, BUFSIZE-1, 0)) == -1) {
		perror("recv");
		exit(1);
	}

	if (strlen(buf) == 1) {
		if (!strncmp(buf,"0",1)) {
			exit(0);
		} else if (!strncmp(buf,"1",1)) {
			exit(1);
		}
	}
	buf[numbytes] = '\0';

	printf("%s\n",buf);

	close(sockfd);

	return 0;
}