By default, on OpenWRT devices at least, vfat partitions are mounted and owned by root. in fstab, you can add options so that it mounts and is owned my nobody/nogroup on bootup by adding these options in the fstab file after rw,sync and what ever else you have listed. I did this to allow droopy and piratebox to have RWX and everyone else RX status.

umask=002,uid=65534,gid=65534

for Samba to only have Read/Execute status (as i dont want just anyone deleting files) you need to create an additional user in OpenWRT. for example. (requires the package shadow-useradd and an internet connection to install it)

opkg update
opkg install shadow-useradd
useradd smbusr

Then in /etc/samba/smb.conf.template, map guest account to the new smbusr in this case. Also make sure 'null passwords = yes' in this same config file.

Tested this and it worked for me. If you are having issues, let me know and I can modify this and help as needed. I hope I didn't omit anything.

Also, note that Samba on OpenWRT requires a bit of RAM overhead. at least 256Mb of Ram is suggested. If you are running a 32Mb RAM device like I am (A5-V11) you will want to create a swap partition of at least 256Mb.
you can read up more on that here.

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PirateBox Installs:
2x Zsun's (both testing, one with serial interface)
A5-V11 (mostly for OpenWRT testing DIY)
2x RPi Zero's
(one active in car 24/7, gets a lot of hits at Walmart, movie theaters and the mall)
2x RPi3's (both home servers, one Ubuntu custom install along side a ton of other services)
1x RPi2 (currently work server)



Edited 2 time(s). Last edit at 10/07/2017 03:08PM by TheExpertNoob.