267e80a9e7
continue the change: https://github.com/apache/nuttx/pull/6843 Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
90 lines
2.4 KiB
Plaintext
90 lines
2.4 KiB
Plaintext
README
|
|
======
|
|
|
|
Overview
|
|
--------
|
|
This directory contains logic to support a custom ROMFS system-init script
|
|
and start-up script. These scripts are used by by the NSH when it starts
|
|
provided that CONFIG_NSH_ARCHROMFS=y. These scripts provide a ROMFS volume
|
|
that will be mounted at /etc and will look like this at run-time:
|
|
|
|
NuttShell (NSH) NuttX-8.2
|
|
nsh> ls -Rl /etc
|
|
/etc:
|
|
dr-xr-xr-x 0 .
|
|
-r--r--r-- 20 group
|
|
dr-xr-xr-x 0 init.d/
|
|
-r--r--r-- 35 passwd
|
|
/etc/init.d:
|
|
dr-xr-xr-x 0 ..
|
|
-r--r--r-- 110 rcS
|
|
-r--r--r-- 110 rc.sysinit
|
|
nsh>
|
|
|
|
/etc/init.d/rc.sysinit is system init script; /etc/init.d/rcS is the start-up
|
|
script; /etc/passwd is a the password file. It supports a single user:
|
|
|
|
USERNAME: admin
|
|
PASSWORD: Administrator
|
|
|
|
nsh> cat /etc/passwd
|
|
admin:8Tv+Hbmr3pLVb5HHZgd26D:0:0:/
|
|
|
|
The encrypted passwords in the provided passwd file are only valid if the
|
|
TEA key is set to: 012345678 9abcdef0 012345678 9abcdef0. Changes to either
|
|
the key or the password word will require regeneration of the nsh_romfimg.h
|
|
header file.
|
|
|
|
The format of the password file is:
|
|
|
|
user:x:uid:gid:home
|
|
|
|
Where:
|
|
user: User name
|
|
x: Encrypted password
|
|
uid: User ID (0 for now)
|
|
gid: Group ID (0 for now)
|
|
home: Login directory (/ for now)
|
|
|
|
/etc/group is a group file. It is not currently used.
|
|
|
|
nsh> cat /etc/group
|
|
root:*:0:root,admin
|
|
|
|
The format of the group file is:
|
|
|
|
group:x:gid:users
|
|
|
|
Where:
|
|
group: The group name
|
|
x: Group password
|
|
gid: Group ID
|
|
users: A comma separated list of members of the group
|
|
|
|
/etc/init.d/rcS should have the following contents :
|
|
vi rcS
|
|
echo "This is NuttX"
|
|
|
|
Updating the ROMFS File System
|
|
------------------------------
|
|
The content on the nsh_romfsimg.h header file is generated from a sample
|
|
directory structure. That directory structure is contained in the etc/ directory and can be modified per the following steps:
|
|
|
|
1. Change directory to etc/:
|
|
|
|
cd etc/
|
|
|
|
2. Make modifications as desired.
|
|
|
|
3. Create the new ROMFS image.
|
|
|
|
genromfs -f romfs_img -d etc -V SimEtcVol
|
|
|
|
4. Convert the ROMFS image to a C header file
|
|
|
|
xxd -i romfs_img >nsh_romfsimg.h
|
|
|
|
5. Edit nsh_romfsimg.h, mark both data definitions as 'const' so that
|
|
that will be stored in FLASH.
|
|
|