nbtest.c
上传用户:wudi5211
上传日期:2010-01-21
资源大小:607k
文件大小:1k
- /*
- * nbtest.c: read and write in non-blocking mode
- *
- * Tested with 1.2 on the x86
- *
- * Actually, it should run with any Unix
- */
- #include <stdio.h>
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <errno.h>
- char buffer[4096];
- int main(int argc, char **argv)
- {
- int delay=1, n, m=0;
- if (argc>1) delay=atoi(argv[1]);
- fcntl(0, F_SETFL, fcntl(0,F_GETFL) | O_NONBLOCK); /* stdin */
- fcntl(1, F_SETFL, fcntl(1,F_GETFL) | O_NONBLOCK); /* stdout */
- while (1) {
- n=read(0, buffer, 4096);
- if (n>=0)
- m=write(1, buffer, n);
- if ((n<0 || m<0) && (errno != EAGAIN))
- break;
- sleep(delay);
- }
- perror( n<0 ? "stdin" : "stdout");
- exit(1);
- }