/src/libeio/demo.c

  1#include <stdio.h>
  2#include <stdlib.h>
  3#include <unistd.h>
  4#include <poll.h>
  5#include <string.h>
  6#include <assert.h>
  7#include <fcntl.h>
  8#include <sys/types.h>
  9#include <sys/stat.h>
 10
 11#include "eio.h"
 12
 13int respipe [2];
 14
 15void
 16want_poll (void)
 17{
 18  char dummy;
 19  printf ("want_poll ()\n");
 20  write (respipe [1], &dummy, 1);
 21}
 22
 23void
 24done_poll (void)
 25{
 26  char dummy;
 27  printf ("done_poll ()\n");
 28  read (respipe [0], &dummy, 1);
 29}
 30
 31void
 32event_loop (void)
 33{
 34  // an event loop. yeah.
 35  struct pollfd pfd;
 36  pfd.fd     = respipe [0];
 37  pfd.events = POLLIN;
 38
 39  printf ("\nentering event loop\n");
 40  while (eio_nreqs ())
 41    {
 42      poll (&pfd, 1, -1);
 43      printf ("eio_poll () = %d\n", eio_poll ());
 44    }
 45  printf ("leaving event loop\n");
 46}
 47
 48int
 49res_cb (eio_req *req)
 50{
 51  printf ("res_cb(%d|%s) = %d\n", req->type, req->data ? req->data : "?", EIO_RESULT (req));
 52
 53  if (req->result < 0)
 54    abort ();
 55
 56  return 0;
 57}
 58
 59int
 60readdir_cb (eio_req *req)
 61{
 62  char *buf = (char *)EIO_BUF (req);
 63
 64  printf ("readdir_cb = %d\n", EIO_RESULT (req));
 65
 66  if (EIO_RESULT (req) < 0)
 67    return 0;
 68
 69  while (EIO_RESULT (req)--)
 70    {
 71      printf ("readdir = <%s>\n", buf);
 72      buf += strlen (buf) + 1;
 73    }
 74
 75  return 0;
 76}
 77
 78int
 79stat_cb (eio_req *req)
 80{
 81  struct stat *buf = EIO_STAT_BUF (req);
 82
 83  if (req->type == EIO_FSTAT)
 84    printf ("fstat_cb = %d\n", EIO_RESULT (req));
 85  else
 86    printf ("stat_cb(%s) = %d\n", EIO_PATH (req), EIO_RESULT (req));
 87
 88  if (!EIO_RESULT (req))
 89    printf ("stat size %d perm 0%o\n", buf->st_size, buf->st_mode & 0777);
 90
 91  return 0;
 92}
 93
 94int
 95read_cb (eio_req *req)
 96{
 97  unsigned char *buf = (unsigned char *)EIO_BUF (req);
 98
 99  printf ("read_cb = %d (%02x%02x%02x%02x %02x%02x%02x%02x)\n",
100          EIO_RESULT (req),
101          buf [0], buf [1], buf [2], buf [3],
102          buf [4], buf [5], buf [6], buf [7]);
103
104  return 0;
105}
106
107int last_fd;
108
109int
110open_cb (eio_req *req)
111{
112  printf ("open_cb = %d\n", EIO_RESULT (req));
113
114  last_fd = EIO_RESULT (req);
115
116  return 0;
117}
118
119int
120main (void)
121{
122  printf ("pipe ()\n");
123  if (pipe (respipe)) abort ();
124
125  printf ("eio_init ()\n");
126  if (eio_init (want_poll, done_poll)) abort ();
127
128  do
129    {
130      /* avoid relative paths yourself(!) */
131      eio_mkdir ("eio-test-dir", 0777, 0, res_cb, "mkdir");
132      eio_nop (0, res_cb, "nop");
133      event_loop ();
134
135      eio_stat ("eio-test-dir", 0, stat_cb, "stat");
136      eio_lstat ("eio-test-dir", 0, stat_cb, "stat");
137      eio_open ("eio-test-dir/eio-test-file", O_RDWR | O_CREAT, 0777, 0, open_cb, "open");
138      eio_symlink ("test", "eio-test-dir/eio-symlink", 0, res_cb, "symlink");
139      eio_mknod ("eio-test-dir/eio-fifo", S_IFIFO, 0, 0, res_cb, "mknod");
140      event_loop ();
141
142      eio_utime ("eio-test-dir", 12345.678, 23456.789, 0, res_cb, "utime");
143      eio_futime (last_fd, 92345.678, 93456.789, 0, res_cb, "futime");
144      eio_chown ("eio-test-dir", getuid (), getgid (), 0, res_cb, "chown");
145      eio_fchown (last_fd, getuid (), getgid (), 0, res_cb, "fchown");
146      eio_fchmod (last_fd, 0723, 0, res_cb, "fchmod");
147      eio_readdir ("eio-test-dir", 0, 0, readdir_cb, "readdir");
148      eio_readdir ("/nonexistant", 0, 0, readdir_cb, "readdir");
149      eio_fstat (last_fd, 0, stat_cb, "stat");
150      eio_write (last_fd, "test\nfail\n", 10, 4, 0, res_cb, "write");
151      event_loop ();
152
153      eio_read (last_fd, 0, 8, 0, EIO_PRI_DEFAULT, read_cb, "read");
154      eio_readlink ("eio-test-dir/eio-symlink", 0, res_cb, "readlink");
155      event_loop ();
156
157      eio_dup2 (1, 2, EIO_PRI_DEFAULT, res_cb, "dup"); // dup stdout to stderr
158      eio_chmod ("eio-test-dir", 0765, 0, res_cb, "chmod");
159      eio_ftruncate (last_fd, 9, 0, res_cb, "ftruncate");
160      eio_fdatasync (last_fd, 0, res_cb, "fdatasync");
161      eio_fsync (last_fd, 0, res_cb, "fsync");
162      eio_sync (0, res_cb, "sync");
163      eio_busy (0.5, 0, res_cb, "busy");
164      event_loop ();
165
166      eio_sendfile (1, last_fd, 4, 5, 0, res_cb, "sendfile"); // write "test\n" to stdout
167      eio_fstat (last_fd, 0, stat_cb, "stat");
168      event_loop ();
169
170      eio_truncate ("eio-test-dir/eio-test-file", 6, 0, res_cb, "truncate");
171      eio_readahead (last_fd, 0, 64, 0, res_cb, "readahead");
172      event_loop ();
173
174      eio_close (last_fd, 0, res_cb, "close");
175      eio_link ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-2", 0, res_cb, "link");
176      event_loop ();
177
178      eio_rename ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-renamed", 0, res_cb, "rename");
179      event_loop ();
180
181      eio_unlink ("eio-test-dir/eio-fifo", 0, res_cb, "unlink");
182      eio_unlink ("eio-test-dir/eio-symlink", 0, res_cb, "unlink");
183      eio_unlink ("eio-test-dir/eio-test-file-2", 0, res_cb, "unlink");
184      eio_unlink ("eio-test-dir/eio-test-file-renamed", 0, res_cb, "unlink");
185      event_loop ();
186
187      eio_rmdir ("eio-test-dir", 0, res_cb, "rmdir");
188      event_loop ();
189    }
190  while (0);
191
192  return 0;
193}
194