linux下網絡編程學習

http://blog.csdn.net/Simba888888/article/category/1426325

select()使用例子

#include <stdio.h> #include <sys/time.h> #include <sys/types.h> #include <unistd.h>#define TIMEOUT 5 #define BUF_LEN 1024int main(void) {struct timeval tv;fd_set rfds;int ret;FD_ZERO(&rfds);FD_SET(STDIN_FILENO, &rfds);tv.tv_sec = TIMEOUT;tv.tv_usec = 0;ret = select(STDIN_FILENO+1, &rfds, NULL, NULL, &tv);if (ret == -1) {perror("select()");return 1;} else if (!ret) {printf("%d seconds elapsed.\n", TIMEOUT);return 0;}if (FD_ISSET(STDIN_FILENO, &rfds)) {char buf[BUF_LEN+1];int len;len = read(STDIN_FILENO, buf, BUF_LEN);if (len == -1) {perror("read()");return 1;}if (len) {buf[len] = 0;printf("read: %s\n", buf);}return 0;}fprintf(stderr, "This should not happen.\n");return 1; }

?poll()使用例子

#include <stdio.h> #include <unistd.h> #include <poll.h>#define TIMEOUT 5int main(void) {struct pollfd fds[2];int ret;fds[0].fd = STDIN_FILENO;fds[0].events = POLLIN;fds[1].fd = STDOUT_FILENO;fds[1].events = POLLOUT;ret = poll(fds, 2, TIMEOUT*1000);if (ret == -1) {perror("poll()");return 1;}if (!ret) {printf("%d seconds elapsed.\n", TIMEOUT);return 0;}if (fds[0].revents & POLLIN)printf("stdin is readable\n");if (fds[1].revents & POLLOUT)printf("stdout is writable\n");return 0; }

?

轉載于:https://www.cnblogs.com/feilv/p/5593276.html

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