This source file includes following definitions.
- main
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19 #include <config.h>
20
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <sys/select.h>
24
25 int
26 main (int argc, char *argv[])
27 {
28 if (argc == 4)
29 {
30 char mode = argv[1][0];
31
32 if (mode == 'r' || mode == 'w')
33 {
34 int fd = atoi (argv[2]);
35
36 if (fd >= 0)
37 {
38 const char *result_file_name = argv[3];
39 FILE *result_file = fopen (result_file_name, "wb");
40
41 if (result_file != NULL)
42 {
43 fd_set fds;
44 struct timeval timeout;
45 int ret;
46
47 FD_ZERO (&fds);
48 FD_SET (fd, &fds);
49 timeout.tv_sec = 0;
50 timeout.tv_usec = 10000;
51 ret = (mode == 'r'
52 ? select (fd + 1, &fds, NULL, NULL, &timeout)
53 : select (fd + 1, NULL, &fds, NULL, &timeout));
54 if (ret < 0)
55 {
56 perror ("select failed");
57 exit (1);
58 }
59 if ((ret == 0) != ! FD_ISSET (fd, &fds))
60 {
61 fprintf (stderr, "incorrect return value\n");
62 exit (1);
63 }
64 fprintf (result_file, "%d\n", ret);
65 exit (0);
66 }
67 }
68 }
69 }
70 fprintf (stderr, "Usage: test-select-fd mode fd result-file-name\n");
71 exit (1);
72 }