Hi I am new to openwrt trying to build images with trunk repository

was playing with rc.d directory

(under /files/etc) trying to change S40fstab to S13fstab

I am trying to mount a usb device as storage for the log files to see if I can understand

what is going on at startup with my router configuration so I would like to have the usb mounted as soon as possible to

start system logging

but when I rebuild the image under etc/rc.d S13fstab get reversad to S40fstab.

I read on the forum that with uci I should try to change prioprity in squashfs-root/etc/uci-defaults ?

My question is why etc/rc.d gets rewritten ?

What UCi means ? Meaning is there a picture/slide/ something that could helpo me to understand what is going on at

router startup (after the boot). I kind of understud that Uci takes control over initial configuration but why having both

uci-defaults and rc.d ??

I know the initial learning curve is steep but I am like missing an overall big picture/flow chart that could help me understand how an embedded router works .

Thank You very much for your patience !!!

Is there any kind of manual (pdf version) that could help me understand openwrt apart from the wiki ?

Should I start with books about linux and routing ?

Bests

P.

(Last edited by Pippo1980 on 22 Dec 2017, 13:51)

uci is the universal command interface:  https://wiki.openwrt.org/doc/uci

the uci-defaults scripts get deleted automatically once the run with an exit code of 0.  They are for one time run generally to set parameters.

the /etc/init.d files are executed every time the router boots   https://wiki.openwrt.org/doc/techref/initscripts

Hi trying to figure out UCI configuration:

squashfs-root/etc/uci-defaults/03_network

the scripts starts with:

#!/bin/sh
#
# Copyright (C) 2011 OpenWrt.org
#

[ -e /etc/config/network ] && exit 0

touch /etc/config/network

. /lib/functions/uci-defaults.sh
. /lib/ar71xx.sh

ucidef_set_interface_loopback

board=$(ar71xx_board_name)

case "$board" in
all0315n |\
all0258n |\
ja76pf2|\
ubnt-unifi-outdoor)
    ucidef_set_interface_lan "eth0 eth1"

..........................................................

where does the "$board" in the   'case "$board" in? line

come from ??

I mean if I am trying to replicate a openwrt installation using binaries from router X to a router Y with a compatible motherboard could I just
replace

board=$(ar71xx_board_name) with i.e. board=$wndr3700 or something similar ...

I know this is basic scripting but to me its like hieroglyphic

Thanks

P.

. /lib/ar71xx.sh    <------ from there

thanks I'll see If I can figure it out

Bests

P.