1 /*
2 * Test out reading with poll()
3 * This should run with any Unix
4 *
5 * Copyright (C) 2003 Alessandro Rubini and Jonathan Corbet
6 * Copyright (C) 2003 O'Reilly & Associates
7 *
8 * The source code in this file can be freely used, adapted,
9 * and redistributed in source or binary form, so long as an
10 * acknowledgment appears in derived source files. The citation
11 * should list that the code comes from the book "Linux Device
12 * Drivers" by Alessandro Rubini and Jonathan Corbet, published
13 * by O'Reilly & Associates. No warranty is attached;
14 * we cannot take responsibility for errors or fitness for use.
15 *
16 * $Id: polltest.c,v 1.1 2003/02/07 18:01:38 corbet Exp $
17 */
18
19 #include <stdio.h>
20 #include <unistd.h>
21 #include <stdlib.h>
22 #include <errno.h>
23 #include <sys/poll.h>
24 #include <fcntl.h>
25
26 char buffer[4096];
27
28 int main(int argc, char **argv)
29 {
30 struct pollfd pfd;
31 int n;
32
33 fcntl(0, F_SETFL, fcntl(0,F_GETFL) | O_NONBLOCK); /* stdin */
34 pfd.fd = 0; /* stdin */
35 pfd.events = POLLIN;
36
37 while (1) {
38 n=read(0, buffer, 4096);
39 if (n >= 0)
40 write(1, buffer, n);
41 n = poll(&pfd, 1, -1);
42 if (n < 0)
43 break;
44 }
45 perror( n<0 ? "stdin" : "stdout");
46 exit(1);
47 }
48
|
This page was automatically generated by the
LXR engine.
|