// access
int fs_entry_access( struct fs_core* core, char const* path, int mode, uint64_t user, uint64_t volume ) {
// make sure this path exists
int err = 0;
struct fs_entry* fent = fs_entry_resolve_path( core, path, user, volume, false, &err );
if( !fent || err ) {
if( !err )
err = -ENOMEM;
return err;
}
// F_OK implicitly satisfied
if( (mode & R_OK) && !IS_READABLE( fent->mode, fent->owner, fent->volume, user, volume ) ) {
err = -EACCES;
}
else if( (mode & W_OK) && !IS_WRITEABLE( fent->mode, fent->owner, fent->volume, user, volume ) ) {
err = -EACCES;
}
else if( (mode & X_OK) && !IS_EXECUTABLE( fent->mode, fent->owner, fent->volume, user, volume ) ) {
err = -EACCES;
}
fs_entry_unlock( fent );
return err;
}
static int romfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
FAR struct stat *buf)
{
FAR struct romfs_mountpt_s *rm;
FAR struct romfs_dirinfo_s dirinfo;
int ret;
fvdbg("Entry\n");
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
rm = mountpt->i_private;
/* Check if the mount is still healthy */
romfs_semtake(rm);
ret = romfs_checkmount(rm);
if (ret != OK)
{
fdbg("romfs_checkmount failed: %d\n", ret);
goto errout_with_semaphore;
}
/* Find the directory entry corresponding to relpath. */
ret = romfs_finddirentry(rm, &dirinfo, relpath);
/* If nothing was found, then we fail with EEXIST */
if (ret < 0)
{
fvdbg("Failed to find directory: %d\n", ret);
goto errout_with_semaphore;
}
memset(buf, 0, sizeof(struct stat));
if (IS_DIRECTORY(dirinfo.rd_next))
{
/* It's a read-only directory name */
buf->st_mode = S_IFDIR|S_IROTH|S_IRGRP|S_IRUSR;
if (IS_EXECUTABLE(dirinfo.rd_next))
{
buf->st_mode |= S_IXOTH|S_IXGRP|S_IXUSR;
}
}
else if (IS_FILE(dirinfo.rd_next))
{
/* It's a read-only file name */
buf->st_mode = S_IFREG|S_IROTH|S_IRGRP|S_IRUSR;
if (IS_EXECUTABLE(dirinfo.rd_next))
{
buf->st_mode |= S_IXOTH|S_IXGRP|S_IXUSR;
}
}
else
{
/* Otherwise, pretend like the unsupported node does not exist */
fvdbg("Unsupported inode: %d\n", dirinfo.rd_next);
ret = -ENOENT;
goto errout_with_semaphore;
}
/* File/directory size, access block size */
buf->st_size = dirinfo.rd_size;
buf->st_blksize = rm->rm_hwsectorsize;
buf->st_blocks = (buf->st_size + buf->st_blksize - 1) / buf->st_blksize;
ret = OK;
errout_with_semaphore:
romfs_semgive(rm);
return ret;
}