int a4l_init_proc(void)
{
int ret = 0;
struct proc_dir_entry *entry;
/* Creates the global directory */
a4l_proc_root = create_proc_entry("analogy", S_IFDIR, 0);
if (a4l_proc_root == NULL) {
__a4l_err("a4l_proc_init: "
"failed to create /proc/analogy\n");
return -ENOMEM;
}
/* Creates the devices related file */
entry = create_proc_entry("devices", 0444, a4l_proc_root);
if (entry == NULL) {
__a4l_err("a4l_proc_init: "
"failed to create /proc/analogy/devices\n");
ret = -ENOMEM;
goto err_proc_init;
}
entry->nlink = 1;
entry->data = NULL;
entry->write_proc = NULL;
entry->read_proc = a4l_rdproc_devs;
wrap_proc_dir_entry_owner(entry);
/* Creates the drivers related file */
entry = create_proc_entry("drivers", 0444, a4l_proc_root);
if (entry == NULL) {
__a4l_err("a4l_proc_init: "
"failed to create /proc/analogy/drivers\n");
ret = -ENOMEM;
goto err_proc_init;
}
entry->nlink = 1;
entry->data = NULL;
entry->write_proc = NULL;
entry->read_proc = a4l_rdproc_drvs;
wrap_proc_dir_entry_owner(entry);
return 0;
err_proc_init:
remove_proc_entry("devices", a4l_proc_root);
remove_proc_entry("analogy", NULL);
return ret;
}
int a4l_proc_attach(a4l_cxt_t * cxt)
{
int ret = 0;
a4l_dev_t *dev = a4l_get_dev(cxt);
struct proc_dir_entry *entry;
char *entry_name, *p;
/* Allocates the buffer for the file name */
entry_name = rtdm_malloc(A4L_NAMELEN + 4);
if ((p = entry_name) == NULL) {
__a4l_err("a4l_proc_attach: failed to allocate buffer\n");
return -ENOMEM;
}
/* Creates the proc file name */
p += sprintf(p, "%02d-", a4l_get_minor(cxt));
strncpy(p, dev->driver->board_name, A4L_NAMELEN);
/* Creates the proc entry */
entry = create_proc_entry(entry_name, 0444, a4l_proc_root);
if (entry == NULL) {
__a4l_err("a4l_proc_attach: "
"failed to create /proc/analogy/%s\n",
entry_name);
ret = -ENOMEM;
goto out_setup_proc_transfer;
}
entry->nlink = 1;
entry->data = &dev->transfer;
entry->write_proc = NULL;
entry->read_proc = a4l_rdproc_transfer;
wrap_proc_dir_entry_owner(entry);
out_setup_proc_transfer:
/* Frees the file name buffer */
rtdm_free(entry_name);
return ret;
}
