[OpenWrt-Devel] [PATCH procd] move /dev/shm to /tmp/shm

[John Crispin]

what kind of usage do you expect ?

On 11/07/2015 03:58, Daniel Gimpelevich wrote:
> Since the /dev filesystem is tiny, /dev/shm needs to live somewhere
> else.
> 
> Signed-off-by: Daniel Gimpelevich <daniel at gimpelevich.san-francisco.ca.us>
> --- a/initd/early.c	2015-06-19 14:01:25.000000000 -0700
> +++ b/initd/early.c	2015-07-10 15:04:23.270143065 -0700
> @@ -66,16 +66,20 @@
>  	mount("sysfs", "/sys", "sysfs", MS_NOATIME, 0);
>  	mount("none", "/sys/fs/cgroup", "cgroup", 0, 0);
>  	mount("tmpfs", "/dev", "tmpfs", MS_NOATIME, "mode=0755,size=512K");
> -	mkdir("/dev/shm", 01777);
> +	symlink("/tmp/shm", "/dev/shm");
>  	mkdir("/dev/pts", 0755);
>  	mount("devpts", "/dev/pts", "devpts", MS_NOATIME, "mode=600");
>  	early_dev();
>  
>  	early_console("/dev/console");
> -	if (mount_zram_on_tmp())
> +	if (mount_zram_on_tmp()) {
>  		mount("tmpfs", "/tmp", "tmpfs", MS_NOSUID | MS_NODEV | MS_NOATIME, NULL);
> -	else
> -		mkdev("*", 0600);
> +		mkdir("/tmp/shm", 01777);
> +	} else {
> +		mkdir("/tmp/shm", 01777);
> +		mount("tmpfs", "/tmp/shm", "tmpfs", MS_NOSUID | MS_NODEV | MS_NOATIME,
> +				"mode=01777");
> +	}
>  	mkdir("/tmp/run", 0777);
>  	mkdir("/tmp/lock", 0777);
>  	mkdir("/tmp/state", 0777);
> --- a/plug/coldplug.c	2015-06-19 14:01:25.000000000 -0700
> +++ b/plug/coldplug.c	2015-07-10 15:04:19.270123233 -0700
> @@ -45,7 +45,7 @@
>  	umount2("/dev/pts", MNT_DETACH);
>  	umount2("/dev/", MNT_DETACH);
>  	mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755,size=512K");
> -	mkdir("/dev/shm", 01777);
> +	symlink("/tmp/shm", "/dev/shm");
>  	mkdir("/dev/pts", 0755);
>  	umask(oldumask);
>  	mount("devpts", "/dev/pts", "devpts", 0, 0);
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> 
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