begin program

mini_serv.c

@@ -1,64 +1,87 @@
+//#include <errno.h>
+//#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
 
-// write
-// close
-// select
-// socket
 // accept
-// listen
-// send
-// recv
-// bind
-// strstr
-// malloc
-// realloc
-// free
-// calloc
-// bzero
 // atoi
-// sprintf
-// strlen
+// bind
+// bzero
+// calloc
+// close
 // exit
-// strcpy
-// strcat
+// free
+// listen
+// malloc
 // memset
+// realloc
+// recv
+// select
+// send
+// socket
+// sprintf
+// strcat
+// strcpy
+// strlen
+// strstr
+// write
 
-
-int main() {
-	int sockfd, connfd, len;
-	struct sockaddr_in servaddr, cli; 
-
-	// socket create and verification 
-	sockfd = socket(AF_INET, SOCK_STREAM, 0); 
-	if (sockfd == -1) { 
-		printf("socket creation failed...\n"); 
-		exit(0); 
-	} 
-	else
-		printf("Socket successfully created..\n"); 
-	bzero(&servaddr, sizeof(servaddr)); 
-
-	// assign IP, PORT 
-	servaddr.sin_family = AF_INET; 
-	servaddr.sin_addr.s_addr = htonl(2130706433); //127.0.0.1
-	servaddr.sin_port = htons(8081); 
-
-	// Binding newly created socket to given IP and verification 
-	if ((bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr))) != 0) { 
-		printf("socket bind failed...\n"); 
-		exit(0); 
-	} 
-	else
-		printf("Socket successfully binded..\n");
-	if (listen(sockfd, 10) != 0) {
-		printf("cannot listen\n"); 
-		exit(0); 
-	}
-	len = sizeof(cli);
-	connfd = accept(sockfd, (struct sockaddr *)&cli, &len);
-	if (connfd < 0) { 
-		printf("server acccept failed...\n"); 
-		exit(0);
-	} 
-	else
-		printf("server acccept the client...\n");
+void putstr(int fd, char *str) {
+	write(fd, str, strlen(str));
+}
+
+void error(char *str, int code) {
+	putstr(2, str);
+	exit(code);
+}
+
+int main(int ac, char **av) {
+	int port;
+	int sockfd;
+//	int connfd;
+//	int len;
+	struct sockaddr_in servaddr;
+//	struct cli;
+
+	if (ac < 1)
+		error("Wrong number of arguments\n", 1);
+	port = atoi(av[1]);
+	if (port == -1)
+		error("Fatal error\n", 1);
+
+	// socket create and verification
+	sockfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sockfd == -1)
+		error("socket creation failed...\n", 0);
+	else
+		putstr(1, "Socket successfully created..\n");
+	bzero(&servaddr, sizeof(servaddr));
+
+	// assign IP, PORT
+	servaddr.sin_family = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(2130706433); //127.0.0.1
+	servaddr.sin_port = htons(8081);
+
+//	// Binding newly created socket to given IP and verification
+//	if ((bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr))) != 0) {
+//		printf("socket bind failed...\n");
+//		exit(0);
+//	}
+//	else
+//		printf("Socket successfully binded..\n");
+//	if (listen(sockfd, 10) != 0) {
+//		printf("cannot listen\n");
+//		exit(0);
+//	}
+//	len = sizeof(cli);
+//	connfd = accept(sockfd, (struct sockaddr *)&cli, &len);
+//	if (connfd < 0) {
+//		printf("server acccept failed...\n");
+//		exit(0);
+//	}
+//	else
+//		printf("server acccept the client...\n");
 }