diff options
| author | David Sterba <dsterba@suse.cz> | 2014-04-24 15:21:16 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2014-12-04 16:48:10 +0100 |
| commit | 6e4d756dee1cc8191cc8da43b6fdd22838fc88fb (patch) | |
| tree | 8a4a3177b8b77f790d1f071b5a6fdbe022cba25b | |
| parent | f4e73c060d5de4f809b8cfaeee7491c35ecd3c4b (diff) | |
btrfs-progs: check if we can't get info from ioctls due to permissions
The TREE_SEARCH ioctl is root-only, FS_INFO will be available for
non-root users with an updated kernel, let the user know.
Signed-off-by: David Sterba <dsterba@suse.cz>
| -rw-r--r-- | cmds-fi-disk_usage.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/cmds-fi-disk_usage.c b/cmds-fi-disk_usage.c index f432fa57..8bc4f58f 100644 --- a/cmds-fi-disk_usage.c +++ b/cmds-fi-disk_usage.c @@ -172,6 +172,12 @@ int load_chunk_info(int fd, struct chunk_info **info_ptr, int *info_count) while (1) { ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args); e = errno; + if (ret == -EPERM) { + fprintf(stderr, + "ERROR: can't read detailed chunk info from ioctl(TREE_SEARCH), run as root\n"); + return 0; + } + if (ret < 0) { fprintf(stderr, "ERROR: can't perform the search - %s\n", @@ -461,6 +467,10 @@ int load_device_info(int fd, struct device_info **device_info_ptr, *device_info_ptr = 0; ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args); + if (ret == -EPERM) { + fprintf(stderr, "ERROR: can't get filesystem info from ioctl(FS_INFO), run as root\n"); + return -1; + } if (ret < 0) { fprintf(stderr, "ERROR: cannot get filesystem info\n"); return -1; |