static int binfs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode)
{
int index;
finfo("Open '%s'\n", relpath);
/* BINFS is read-only. Any attempt to open with any kind of write
* access is not permitted.
*/
if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
{
ferr("ERROR: Only O_RDONLY supported\n");
return -EACCES;
}
/* Check if the an entry exists with this name in the root directory.
* so the 'relpath' must be the name of the builtin function.
*/
index = builtin_isavail(relpath);
if (index < 0)
{
ferr("ERROR: Builting %s does not exist\n", relpath);
return -ENOENT;
}
/* Save the index as the open-specific state in filep->f_priv */
filep->f_priv = (FAR void *)((uintptr_t)index);
return OK;
}
static int builtin_loadbinary(struct binary_s *binp)
{
FAR const char *filename;
FAR const struct builtin_s *b;
int fd;
int index;
int ret;
binfo("Loading file: %s\n", binp->filename);
/* Open the binary file for reading (only) */
fd = open(binp->filename, O_RDONLY);
if (fd < 0)
{
int errval = get_errno();
berr("ERROR: Failed to open binary %s: %d\n", binp->filename, errval);
return -errval;
}
/* If this file is a BINFS file system, then we can recover the name of
* the file using the FIOC_FILENAME ioctl() call.
*/
ret = ioctl(fd, FIOC_FILENAME, (unsigned long)((uintptr_t)&filename));
if (ret < 0)
{
int errval = get_errno();
berr("ERROR: FIOC_FILENAME ioctl failed: %d\n", errval);
close(fd);
return -errval;
}
/* Other file systems may also support FIOC_FILENAME, so the real proof
* is that we can look up the index to this name in g_builtins[].
*/
index = builtin_isavail(filename);
if (index < 0)
{
int errval = get_errno();
berr("ERROR: %s is not a builtin application\n", filename);
close(fd);
return -errval;
}
/* Return the load information. NOTE: that there is no way to configure
* the priority. That is a bug and needs to be fixed.
*/
b = builtin_for_index(index);
binp->entrypt = b->main;
binp->stacksize = b->stacksize;
binp->priority = b->priority;
close(fd);
return OK;
}
int exec_builtin(FAR const char *appname, FAR char * const *argv,
FAR const char *redirfile, int oflags)
{
FAR const struct builtin_s *builtin;
posix_spawnattr_t attr;
posix_spawn_file_actions_t file_actions;
struct sched_param param;
pid_t pid;
int index;
int ret;
/* Verify that an application with this name exists */
index = builtin_isavail(appname);
if (index < 0)
{
ret = ENOENT;
goto errout_with_errno;
}
/* Get information about the builtin */
builtin = builtin_for_index(index);
if (builtin == NULL)
{
ret = ENOENT;
goto errout_with_errno;
}
/* Initialize attributes for task_spawn(). */
ret = posix_spawnattr_init(&attr);
if (ret != 0)
{
goto errout_with_errno;
}
ret = posix_spawn_file_actions_init(&file_actions);
if (ret != 0)
{
goto errout_with_attrs;
}
/* Set the correct task size and priority */
param.sched_priority = builtin->priority;
ret = posix_spawnattr_setschedparam(&attr, ¶m);
if (ret != 0)
{
goto errout_with_actions;
}
ret = task_spawnattr_setstacksize(&attr, builtin->stacksize);
if (ret != 0)
{
goto errout_with_actions;
}
/* If robin robin scheduling is enabled, then set the scheduling policy
* of the new task to SCHED_RR before it has a chance to run.
*/
#if CONFIG_RR_INTERVAL > 0
ret = posix_spawnattr_setschedpolicy(&attr, SCHED_RR);
if (ret != 0)
{
goto errout_with_actions;
}
ret = posix_spawnattr_setflags(&attr,
POSIX_SPAWN_SETSCHEDPARAM |
POSIX_SPAWN_SETSCHEDULER);
if (ret != 0)
{
goto errout_with_actions;
}
#else
ret = posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDPARAM);
if (ret != 0)
{
goto errout_with_actions;
}
#endif
/* Is output being redirected? */
if (redirfile)
{
/* Set up to close open redirfile and set to stdout (1) */
ret = posix_spawn_file_actions_addopen(&file_actions, 1,
redirfile, O_WRONLY, 0644);
if (ret != 0)
{
sdbg("ERROR: posix_spawn_file_actions_addopen failed: %d\n", ret);
goto errout_with_actions;
}
}
/* Start the built-in */
ret = task_spawn(&pid, builtin->name, builtin->main, &file_actions,
&attr, (argv) ? &argv[1] : (FAR char * const *)NULL,
(FAR char * const *)NULL);
if (ret != 0)
{
sdbg("ERROR: task_spawn failed: %d\n", ret);
goto errout_with_actions;
}
/* Free attibutes and file actions. Ignoring return values in the case
* of an error.
*/
/* Return the task ID of the new task if the task was sucessfully
* started. Otherwise, ret will be ERROR (and the errno value will
* be set appropriately).
*/
(void)posix_spawn_file_actions_destroy(&file_actions);
(void)posix_spawnattr_destroy(&attr);
return pid;
errout_with_actions:
(void)posix_spawn_file_actions_destroy(&file_actions);
errout_with_attrs:
(void)posix_spawnattr_destroy(&attr);
errout_with_errno:
set_errno(ret);
return ERROR;
}