Please can you add some example here?
Ivana
----- Original Message -----
> From: "Weng Meiling" <wengmeiling.w...@huawei.com>
> To: libcg-devel@lists.sourceforge.net
> Cc: "libo chen" <libo.c...@huawei.com>
> Sent: Friday, August 2, 2013 10:24:49 AM
> Subject: [Libcg-devel] [PATCH] cgclear: clear the mount info
>
>
> From: Weng Meiling <wengmeiling.w...@huawei.com>
>
> When we use cgclear to unload the cgroup filesystem, we still can
> see the umounted cgroup by using mount command. So fix the problem
> by call system.
>
> From: Weng Meiling <wengmeiling.w...@huawei.com>
> ---
> src/config.c | 18 ++++++++++++++++--
> 1 files changed, 16 insertions(+), 2 deletions(-)
>
> diff --git a/src/config.c b/src/config.c
> index 06f559b..967b3f7 100644
> --- a/src/config.c
> +++ b/src/config.c
> @@ -1141,6 +1141,20 @@ err_mnt:
> return error;
> }
>
> +/* umounts given mount */
> +static int umount_system(char *path)
> +{
> + char cmd[FILENAME_MAX + 7];
> + int err = -1;
> +
> + snprintf(cmd, sizeof(cmd), "%s %s", "umount", path);
> + err = system(cmd);
> + if (err != -1 && WIFEXITED(err) && !WEXITSTATUS(err))
> + err = 0;
> + return err;
> +
> +}
> +
> /* unmounts given mount, but only if it is empty */
> static int cgroup_config_try_unmount(struct cg_mount_table_s *mount_info)
> {
> @@ -1197,7 +1211,7 @@ static int cgroup_config_try_unmount(struct
> cg_mount_table_s *mount_info)
> int err;
> cgroup_dbg("unmounting %s at %s\n", mount_info->name,
> mount->path);
> - err = umount(mount->path);
> + err = umount_system(mount->path);
>
> if (err && !ret) {
> ret = ECGOTHER;
> @@ -1305,7 +1319,7 @@ static int cgroup_config_unload_controller(const struct
> cgroup_mount_point *moun
> ret = cgroup_get_subsys_mount_point_begin(mount_info->name, &handle,
> path);
> while (ret == 0) {
> - error = umount(path);
> + error = umount_system(path);
> if (error) {
> cgroup_warn("Warning: cannot unmount controller %s on
> %s: %s\n",
> mount_info->name, path,
> -- 1.7.1
>
>
>
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