[lxc-devel] [PATCH] lxc_setup_fs: Create /dev/shm folder if it doesn't exist

[Serge Hallyn]

Quoting Bogdan Purcareata (bogdan.purcareata at nxp.com):
> When running application containers with lxc-execute, /dev is
> populated only with device entries. Since /dev is a tmpfs mount in
> the container environment, the /dev/shm folder not being present is not
> a sufficient reason for the /dev/shm mount to fail.
> 
> Create the /dev/shm directory if not present.
> 
> Signed-off-by: Bogdan Purcareata <bogdan.purcareata at nxp.com>

Acked-by: Serge E. Hallyn <serge.hallyn at ubuntu.com>

> ---
>  src/lxc/initutils.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/src/lxc/initutils.c b/src/lxc/initutils.c
> index 45df60f..8d9016c 100644
> --- a/src/lxc/initutils.c
> +++ b/src/lxc/initutils.c
> @@ -47,6 +47,10 @@ extern void lxc_setup_fs(void)
>  	if (mount_fs("proc", "/proc", "proc"))
>  		INFO("failed to remount proc");
>  
> +	/* if /dev has been populated by us, /dev/shm does not exist */
> +	if (access("/dev/shm", F_OK) && mkdir("/dev/shm", 0777))
> +		INFO("failed to create /dev/shm");
> +
>  	/* if we can't mount /dev/shm, continue anyway */
>  	if (mount_fs("shmfs", "/dev/shm", "tmpfs"))
>  		INFO("failed to mount /dev/shm");
> -- 
> 2.1.4
> 
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