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上课喵
pipe匿名管道的问题
#include func.hint main()
{int fds[2];pipe(fds);pid_t pidfork();if(pid0){ //fatherclose(fds[0]);//close readint fdopen(file2.txt,O_RDONLY);printf(father: fds[1]:%d\n,fds[1]);write(fds[1],fd,sizeof(fd));wait(NULL);close(fd);}else{ //sonclose(fds[1]);//close erint chilfd-1;read(fds[0],chilfd,sizeof(chilfd)); //read baba pipeprintf(chilefd %d.fds [0]:%d\n,chilfd,fds[0]);char buff[100]{0};read(chilfd,buff,sizeof(buff));printf(buff %s.\n,buff);}return 0;
}writev
#include func.h
#include sys/uio.hint main()
{char buff[]love;char buff2[]xixi;int fdopen(file2.txt,O_RDWR|O_CREAT,0664);if(fd-1){};struct iovec iov[2];iov[0].iov_basebuff;iov[0].iov_lenstrlen(buff);iov[1].iov_basebuff2;iov[1].iov_lenstrlen(buff2);int retwritev(fd,iov,2);printf(ret :%d \n,ret);close(fd);return 0;
}readv
#include func.h
#include sys/uio.hint main()
{char buff[6]{0};char buff2[6]{0};int fdopen(file2.txt,O_RDWR);if(fd-1){};struct iovec iov[2];iov[0].iov_basebuff;/* iov[0].iov_lenstrlen(buff); */iov[0].iov_lensizeof(buff);iov[1].iov_basebuff2;iov[1].iov_lensizeof(buff2);int retreadv(fd,iov,2);printf(ret :%d \n,ret);printf(buff:%s \n,buff);printf(buff2:%s \n,buff2);close(fd);return 0;
}结构体struct msghdr的发送和接收实现
真是酣畅淋漓的CP
代码改好了 ./wr33: sendmsg: Bad file descriptor 嘿嘿~~~因为没有文件所以打开失败了聪明小辉
#include func.h
#include sys/uio.hint sendFd(int pipefd,int fd){//buid 2 groupchar buff[6]hellp;struct iovec iov;memset(iov,0,sizeof(iov));iov.iov_basebuff;iov.iov_lensizeof(buff);//build 3 groupint lenCMSG_LEN(sizeof(fd));struct cmsghdr* cmsg(struct cmsghdr*)calloc(1,len);cmsg-cmsg_lenlen;cmsg-cmsg_levelSOL_SOCKET;cmsg-cmsg_typeSCM_RIGHTS;int * p(int*)CMSG_DATA(cmsg);*pfd;// buid msghdrstruct msghdr msg;memset(msg,0,sizeof(msg));msg.msg_ioviov;msg.msg_iovlen1;msg.msg_controlcmsg;//传递文件描述msg.msg_controllenlen;int retsendmsg(pipefd,msg,0);printf(sendmsg ret: %d\n,ret);if(ret-1){error(1,errno,sendmsg);}free(cmsg);return 0;
}int recvFd(int pipefd,int *pfd){//buid 2 groupchar buff[6]{0};struct iovec iov;memset(iov,0,sizeof(iov));iov.iov_basebuff;iov.iov_lensizeof(buff);//3 groupint lenCMSG_LEN(sizeof(int));struct cmsghdr* cmsg(struct cmsghdr*)calloc(1,len);cmsg-cmsg_lenlen;cmsg-cmsg_levelSOL_SOCKET;cmsg-cmsg_typeSCM_RIGHTS;struct msghdr msg;memset(msg,0,sizeof(msg));msg.msg_ioviov;msg.msg_iovlen1;msg.msg_controlcmsg;//传递文件描述符msg.msg_controllenlen;int ret recvmsg(pipefd,msg,0);if(ret-1){error(1,errno,recvmsg);}int* p(int*)CMSG_DATA(cmsg);printf(buff: %s\n,buff);*pfd*p;//传给外籍的指针(读取文件描述符的值)return 0;
}int main()
{int fds[2];socketpair(AF_LOCAL,SOCK_STREAM,0,fds);pid_t pidfork();if(pid0){ //fatherclose(fds[0]);//close readint fdopen(file1.txt,O_RDONLY);printf(father fd:%d\n,fd);/* write(fds[1],fd,sizeof(fd)); */sendFd(fds[1],fd);wait(NULL);close(fd);}else{ //sonclose(fds[1]);//close erint chilfd-1;/* read(fds[0],chilfd,sizeof(chilfd)); //read baba pipe */recvFd(fds[0],chilfd);printf(chilefd %d.fds [0]:%d\n,chilfd,fds[0]);char buff[100]{0};read(chilfd,buff,sizeof(buff));printf(buff %s.\n,buff);}return 0;
}进程池框架的搭建 作业
01参考我们上课的代码: 让子进程A打开一个文件, 把这个文件描述符信息发给父进程B, 让父进程B在这个文件上能写一个字符串. 好像没什么用
#include func.h
#include sys/uio.hint sendFd(int pipefd,int fd){//buid 2 groupchar buff[6]{0};struct iovec iov;memset(iov,0,sizeof(iov));iov.iov_basebuff;iov.iov_lensizeof(buff);//build 3 groupint lenCMSG_LEN(sizeof(fd));struct cmsghdr* cmsg(struct cmsghdr*)calloc(1,len);cmsg-cmsg_lenlen;cmsg-cmsg_levelSOL_SOCKET;cmsg-cmsg_typeSCM_RIGHTS;int * p(int*)CMSG_DATA(cmsg);*pfd;// buid msghdrstruct msghdr msg;memset(msg,0,sizeof(msg));msg.msg_ioviov;msg.msg_iovlen1;msg.msg_controlcmsg;//传递文件描述msg.msg_controllenlen;int retsendmsg(pipefd,msg,0);if(ret-1){error(1,errno,sendmsg);}free(cmsg);return 0;
}int recvFd(int pipefd,int *pfd){//buid 2 groupchar buff[6]{0};struct iovec iov;memset(iov,0,sizeof(iov));iov.iov_basebuff;iov.iov_lensizeof(buff);//3 groupint lenCMSG_LEN(sizeof(int));struct cmsghdr* cmsg(struct cmsghdr*)calloc(1,len);cmsg-cmsg_lenlen;cmsg-cmsg_levelSOL_SOCKET;cmsg-cmsg_typeSCM_RIGHTS;struct msghdr msg;memset(msg,0,sizeof(msg));msg.msg_ioviov;msg.msg_iovlen1;msg.msg_controlcmsg;//传递文件描述符msg.msg_controllenlen;int ret recvmsg(pipefd,msg,0);if(ret-1){error(1,errno,recvmsg);}int* p(int*)CMSG_DATA(cmsg);*pfd*p;//传给外籍的指针(读取文件描述符的值)return 0;
}int main()
{int fd[2];int errsocketpair(AF_LOCAL,SOCK_STREAM,0,fd);if(err-1){error(1,errno,sockpair);}int pidfork();switch (pid){case -1:error(1,errno,fork);break;case 0:{close(fd[0]);printf(child process:%d\n,getpid());int pfd;recvFd(fd[1],pfd);char buff[]我恨你我恨你我恨你\n;write(pfd,buff,sizeof(buff));close(pfd);break;}default:{close(fd[1]);int filefdopen(file2.txt,O_RDWR);if(filefd-1){error(1,errno,open);}sendFd(fd[0],filefd);break;} }return 0;
}
所以那狗东西要怎么打印出来可恶
02仿照我们上课写的进程池, 自己手写(不要直接复制)一个进程池代码。
过
抄抄抄
02使用select编写聊天室程序客户端和服务端使用tcp通信服务端可以处理新客户端的连接和转发消息客户端可以连入服务端并发送消息。
哥们发现少一个右括号直接傻眼了喵
xiaohuichenxiaohuichen-virtual-machine:~/001/724$ cat douqusi.c
#include func.h
#define IP1 192.168.235.128
#define PORT1 8080int main()
{struct sockaddr_in addr;addr.sin_familyAF_INET;addr.sin_porthtons(PORT1);addr.sin_addr.s_addrinet_addr(IP1);int lifdsocket(AF_INET,SOCK_STREAM,0);bind(lifd,(struct sockaddr *)addr,sizeof(struct sockaddr));listen(lifd,100);int ac_fd[1000];int ac_num0;char buf[256];char buf_sent[256];fd_set readfds;FD_ZERO(readfds);int fd_max;FD_SET(lifd,readfds);fd_maxlifd;fd_set old_fdsreadfds;printf(listenning\n);while(1){readfdsold_fds;select (fd_max1,readfds,NULL,NULL,NULL);if(FD_ISSET(lifd,readfds)){ac_fd[ac_num]accept(lifd,NULL,NULL);FD_SET(ac_fd[ac_num],old_fds);if(ac_fd[ac_num]fd_max){fd_maxac_fd[ac_num];}ac_num;printf(welcome user%d \n,ac_fd[ac_num-1]);}for(int i0;iac_num;i){if(FD_ISSET(ac_fd[i],readfds)){int arecv(ac_fd[i],buf,256,0);if(a0){close(ac_fd[i]);}}sprintf(buf_sent,user%d:%s,ac_fd[i],buf);for(int j0;jac_num;j){send(ac_fd[j],buf_sent,strlen(buf_sent)1,0);}}}return 0;
}HTTP:咳咳是我不知道怎么跑然后连了一个客户端喵
#include func.h
#define IP1 192.168.235.128
#define PORT1 8080struct sockaddr* addr_create(const char* ip,int port ){struct sockaddr_in* addr(struct sockaddr_in*)malloc(sizeof(struct sockaddr_in));memset(addr,0,sizeof(*addr));addr-sin_familyAF_INET;addr-sin_porthtons(port);addr-sin_addr.s_addrinet_addr(ip);return (struct sockaddr*)addr;
}int main()
{int sofdsocket(AF_INET,SOCK_STREAM,0);if(sofd-1){error(1,errno,socket);}int on1;int retsetsockopt(sofd,SOL_SOCKET,SO_REUSEADDR,on,sizeof(on));if(ret-1){error(1,errno,setsoclopt);}struct sockaddr* addraddr_create(IP1,PORT1);retbind(sofd,addr,sizeof(*addr));if(ret-1){error(1,errno,bind);}retlisten(sofd,1);while(1){int peerfdaccept(sofd,NULL,NULL);char buff[4096]{0};retrecv(peerfd,buff,sizeof(buff),0);printf(\nrecv: %d.bytes \n,ret);printf(----%s\n,buff);char response[4096]{0};const char* start_lineHTTP/1.1 200 ok\r\n;const char* headersServer:MyHttpServer1.0\r\nConnection:keep-aliave\r\nConntent-Type:text/html\r\nContent-Length:;const char* empty_line\r\n;const char* bodyhtmlheadThis is a test/headbodyhello,client/body/html;sprintf(response,%s%s%ld\r\n%s%s,start_line,headers,strlen(body),empty_line,body);send(peerfd,response,strlen(response),0);}close(sofd);return 0;
}
