Chp6: Creating devices (Makedev-1.7)

fr0zen · 11-23-2003, 10:38 PM

So everything has worked fine up until now.

I ran "./MAKEDEV -v generic-nopty" as directed from wthin the /dev folder, chrooted into the LFS environment, and the following happened:

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root:/dev# ./MAKEDEV -v generic-nopty 
./MAKEDEV: line 1: /dev/null: Permission denied 
NOTICE: Resolving user/group names manually using /etc/group and /etc/passwd 
./MAKEDEV: line 1: /dev/null: Permission denied 
NOTICE: Resolving user/group names manually using /etc/group and /etc/passwd 
create mem     c 1 1 root:kmem 0640 
create kmem     c 1 2 root:kmem 0640 
create null     c 1 3 root:root 0666 
create port     c 1 4 root:kmem 0640 
create zero     c 1 5 root:root 0666 
 
// continues on like this, casually erroring about [b]/dev/null[/b]

At first, I paid no mind to the errors. I continued onto the Linux headers installation with "mrproper" and such, until I executed "make include/linux/version.h" and was confronted by the following:

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root:/sources/linux-2.4.22# make include/linux/version.h 
/bin/sh: line 1: /dev/null: Permission denied 
/bin/sh: line 1: /dev/null: Permission denied 
KERNELRELEASE "2.4.22" exceeds 64 characters 
make: *** [include/linux/version.h] Error 1

I consulted google for an answer, and one came up. It was a message board, one of the posters suggested to the thread starter:

Quote:

Lets give /dev/null a test...

create a simple little file that contains anything, say "hello" somewhere. Then type this:

mv /path/to/little/file /dev/null

Well, I did just that. Soon I realize what had happened, the null device was simply replaced by the 'test' file I created. I confirmed this by doing 'cat /dev/null', it printed out the contents of the file.

So, fearing an error, I opened a terminal into my host environment. As a normal user, I executed "cat "test" >> /dev/null; echo "$?". In my host terminal, I got "0", meaning it was a success, whereas in the LFS chrooted terminal, I got:

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root:/sources/linux-2.4.22# cat "test" >> /dev/null;echo "$?" 
bash: /dev/null: Permission denied 
1

So, what, may I ask, did I do wrong? Anyone know of how to fix this?

fr0zen · 11-23-2003, 11:16 PM

Well, as happy as I am that I solved the problem, I feel somewhat deprived of the 8 minutes it took me to compose the above message.

Anywho, I simply looked a bit further (actually right in this forum). All I needed to do was add "dev" to my fstab for the mount. Then, I remounted, voila. For archiving's sake:

/dev/hda5 /mnt/lfs ext2 defaults,users,exec,dev,rw 1 2

320mb · 01-22-2004, 12:35 AM

Cool, the BEST feature of this forum is the search button.
I ran into same problem..........

Quote:

root:/sources/linux-2.4.22# make include/linux/version.h
/bin/sh: line 1: /dev/null: Permission denied
/bin/sh: line 1: /dev/null: Permission denied
KERNELRELEASE "2.4.22" exceeds 64 characters
make: *** [include/linux/version.h] Error 1

and solved it the same way........adding "dev" to the fstab line where lfs is mounted............
a little search goes a long way.......thx fr0zen

<edit/> -------heh, here is something else I found out........for those who read this after the fact...you need to make sure that "dev" is at the END of the fstab line, it has to go after EXEC!!
or you will continue to get the same error message!! just do it as you see above in fr0zen's post........