root cannot write into /usr or other read-only dirs. HOW TO?

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Thireus
DD-WRT User


Joined: 12 Mar 2009
Posts: 93
PostPosted: Sat Nov 28, 2009 19:23    Post subject: root cannot write into /usr or other read-only dirs. HOW TO? Reply with quote
Code:
root@DD-WRT:/usr# echo "plop" > hello
-sh: can't create hello: Read-only file system


:(

--------

I want to patch dropbear, but I cant! The files/dirs are protected!

So I can't run this command:

Code:
sed 's/\/usr\/libexe/\/opt\/libexe/g' dropbear


To make my SFTP work.

Any ideas about how to bypass this protection?

Note: dropbear is already installed into /usr/sbin :'(
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gruenesAlien
DD-WRT Guru


Joined: 27 Nov 2008
Posts: 717
PostPosted: Sat Nov 28, 2009 21:41    Post subject: Reply with quote
Most dirs on dd-wrt and read only. You can install dropbear from optware and use this (and patch this).

Or you can use firmware mod kit to make a custom firmware.
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IVAn Dealer
DD-WRT Novice


Joined: 24 Nov 2009
Posts: 19
PostPosted: Sat Nov 28, 2009 22:05    Post subject: Reply with quote
I only did so. Added the following:

opt/etc/samba/smb.conf
[usr]
<------>comment = usr
<------>path = /usr
<------>read only = No
<------>create mask = 0664
<------>directory mask = 0775
<------>guest ok = Yes
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Thireus
DD-WRT User


Joined: 12 Mar 2009
Posts: 93
PostPosted: Sat Nov 28, 2009 22:36    Post subject: Reply with quote
Samba? Confused
I just need sftp

Yeah I can install a copy of dropbear, and it's working, but it opens a new port on my router, as the 22 is already running for ssh.
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gruenesAlien
DD-WRT Guru


Joined: 27 Nov 2008
Posts: 717
PostPosted: Sun Nov 29, 2009 10:08    Post subject: Reply with quote
dropbear = sshd for small devices. You should kill the old dropbears processes running and start the optware dropbear. You will not need a new port if you killed the only process before.

Apart from that you might try the usage of SCP transfer method that is also secure.
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