c文件编译

随笔记录

目录

1.背景

[2. 编译](#2. 编译)

[2.1 创建 .c 文件](#2.1 创建 .c 文件)

[2.2 编译->执行](#2.2 编译->执行)

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1.背景

c文件在编译为可执行程序

2. 编译

2.1 创建 .c 文件

已知c 文件源码，创建 .c 文件并编译为可执行程序


1. creat  *.c 文件

[root@localhost magx]# vim udp_nobind_sendto.c
[root@localhost magx]# 
[root@localhost magx]# cat udp_nobind_sendto.c
// Client side implementation of UDP client-server model
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

#define PORT	 9000
#define MAXLINE 1024

// Driver code
int main(int argc,char* argv[]) {
	int sockfd;
	char buffer[MAXLINE];
	char *hello = "Hello from client.............................................";
	struct sockaddr_in	 servaddr;
	struct sockaddr_in servaddr1;
	struct sockaddr_in cli;

	// Creating socket file descriptor
	if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
		perror("socket creation failed");
		exit(EXIT_FAILURE);
	}

	memset(&servaddr, 0, sizeof(servaddr));
	memset(&servaddr1, 0, sizeof(servaddr1));
	/*
			// assign IP, PORT
			cli.sin_family = AF_INET;
			cli.sin_addr.s_addr = inet_addr("30.0.0.11");
			cli.sin_port = htons(PORT);

			// Binding newly created socket to given IP and verification
			if ((bind(sockfd, (struct sockaddr *)&cli, sizeof(servaddr))) != 0)
			{
				printf("socket bind failed...\n");
			}
			else
			{
				printf("Socket successfully binded..\n");
			}
	*/
	printf("sleep ....\n");
	//sleep(1);
	printf("sleep ...end\n");

	// Filling server information
	servaddr.sin_family = AF_INET;
	servaddr.sin_port = htons(PORT);
	servaddr.sin_addr.s_addr = inet_addr("10.1.1.9");

	servaddr1.sin_family = AF_INET;
	servaddr1.sin_port = htons(PORT);
	servaddr1.sin_addr.s_addr = inet_addr("10.2.1.9");

	int n, len;

	sendto(sockfd, (const char *)hello, strlen(hello),
		MSG_CONFIRM, (const struct sockaddr *) &servaddr,
			sizeof(servaddr));
	sendto(sockfd, (const char *)hello, strlen(hello),
		   MSG_CONFIRM, (const struct sockaddr *)&servaddr1,
		   sizeof(servaddr1));
	printf("Hello message sent.\n");

	n = recvfrom(sockfd, (char *)buffer, MAXLINE,
				MSG_WAITALL, (struct sockaddr *) &servaddr,
				&len);
	buffer[n] = '\0';
	printf("Server : %s\n", buffer);

	close(sockfd);
	return 0;
}

[root@localhost magx]#

2.2 编译->执行

2. 为 .c 文件添加权限

root@localhost magx]# ll
total 4
-rw------- 1 root root 1985 Nov 14 11:31 udp_nobind_sendto.c
[root@localhost magx]# 
[root@localhost magx]# chmod u+x *
[root@localhost magx]# ll
total 4
-rwx------ 1 root root 1985 Nov 14 11:31 udp_nobind_sendto.c
[root@localhost magx]# 


3. 编译 c文件为可执行程序
# gcc -o <将 .c 文件编译未可执行程序文件名> <要编译 .c 文件> -lpthread

e.g: #gcc -o udp_nobind_sendto udp_nobind_sendto.c -lpthread



[root@localhost magx]# gcc -o udp_nobind_sendto udp_nobind_sendto.c -lpthread
[root@localhost magx]# 
[root@localhost magx]# ll
total 24
-rwx------ 1 root root 17440 Nov 14 11:31 udp_nobind_sendto
-rwx------ 1 root root  1985 Nov 14 11:31 udp_nobind_sendto.c
[root@localhost magx]# 


4. 执行 已编译.c 可执行文件
# ./<执行 已编译.c 可执行文件名> [如果需要传参，再此处添加即可]
e.g:  ./udp_nobind_sendto 54321


[root@localhost magx]# ./udp_nobind_sendto 54321
sleep ....
sleep ...end
Hello message sent.

到此已完成 .c 文件编译