代码非常easy,就是发送c语言发送http请求。但 i= read(sockfd, buf, BUFSIZE-1); 能够正常执行,
替换为i= Read(sockfd, buf, BUFSIZE-1);后程序退出,不知什么原因,求解答。
#include <stdio.h> #include <sys/socket.h> #include <sys/types.h> #include <time.h> #include <errno.h> #include <signal.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/wait.h> #include <sys/time.h> #include <netinet/in.h> #include <arpa/inet.h> #define IPSTR "180.97.33.107" #define PORT 80 #define BUFSIZE 1024 * 1024 * 2 int Read(int fd, char *buf, int count) { int nread, totlen = 0; while (totlen != count) { nread = read(fd, buf, count - totlen); if (nread == 0) return totlen; if (nread == -1) return -1; totlen += nread; buf += nread; } return totlen; } int main(int argc, char **argv) { int sockfd, ret, i, h; struct sockaddr_in servaddr; char str1[4096], buf[BUFSIZE]; socklen_t len; fd_set t_set1; struct timeval tv; if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) { printf("---socket error! "); exit(0); }; bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_port = htons(PORT); if (inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 ){ printf("--inet_pton error! "); exit(0); }; if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0){ printf("connect error! "); exit(0); } memset(str1, 0, 4096); strcat(str1, "GET / HTTP/1.1 "); strcat(str1, "Host: www.baidu.com "); strcat(str1, " "); printf("%s",str1); ret = write(sockfd,str1,strlen(str1)); if (ret < 0) { printf("errno = %d strerror = %s ",errno, strerror(errno)); exit(0); }else{ printf("send %d size ", ret); } FD_ZERO(&t_set1); FD_SET(sockfd, &t_set1); while(1){ tv.tv_sec= 2; tv.tv_usec= 0; h= 0; printf("--------------->1 "); h= select(sockfd +1, &t_set1, NULL, NULL, &tv); printf("--------------->2 "); printf("h =================== %d ", h); //if (h == 0) continue; if (h < 0) { close(sockfd); printf("select error "); return -1; } if (h > 0){ memset(buf, 0, BUFSIZE); i= read(sockfd, buf, BUFSIZE-1); //i= Read(sockfd, buf, BUFSIZE-1); printf("i ========================== %d", i); if (i==0){ close(sockfd); printf("stop ................. "); return -1; } printf("%s ", buf); } } close(sockfd); return 0; }