diff options
Diffstat (limited to 'fs/devfs.c')
| -rw-r--r-- | fs/devfs.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/fs/devfs.c b/fs/devfs.c index 5c96682f96..0b8d4fd246 100644 --- a/fs/devfs.c +++ b/fs/devfs.c @@ -212,12 +212,18 @@ static int devfs_stat(struct device_d *_dev, const char *filename, struct stat * { struct cdev *cdev; - cdev = cdev_by_name(filename + 1); + cdev = lcdev_by_name(filename + 1); if (!cdev) return -ENOENT; s->st_mode = S_IFCHR; s->st_size = cdev->size; + + if (cdev->link) + s->st_mode |= S_IFLNK; + + cdev = cdev_readlink(cdev); + if (cdev->ops->write) s->st_mode |= S_IWUSR; if (cdev->ops->read) @@ -242,6 +248,24 @@ static void devfs_delete(struct device_d *dev) { } +static int devfs_readlink(struct device_d *dev, const char *pathname, + char *buf, size_t bufsz) +{ + struct cdev *cdev; + + cdev = cdev_by_name(pathname + 1); + if (!cdev) + return -ENOENT; + + while (cdev->link) + cdev = cdev->link; + + bufsz = min(bufsz, strlen(cdev->name)); + memcpy(buf, cdev->name, bufsz); + + return 0; +} + static struct fs_driver_d devfs_driver = { .read = devfs_read, .write = devfs_write, @@ -258,6 +282,7 @@ static struct fs_driver_d devfs_driver = { .erase = devfs_erase, .protect = devfs_protect, .memmap = devfs_memmap, + .readlink = devfs_readlink, .flags = FS_DRIVER_NO_DEV, .drv = { .probe = devfs_probe, |