modify a major number associated to a driver

[Stefano_1]

#lsdev -d sinap
Character Block Driver Class
184 -1 sinap pseudo


I need to change the major number of the driver sinap.
How I can do it (if it's possible do it...)??
many thanks

[Tomek Gryszkiewicz]

No, you cannot change it by yourself.

-Tomek

[Bruno Vidal]

Hi,
It is possible if this driver has been written correctly (following hpux rules). Usualy this major is defined in the include of the driver, and at linking time when using mk_kernel it use a file under /usr/conf/master.d/driver_name, and in this file you should find the definition of the major number (for diag2 example):
* Driver Block major Char major
diag2 -1 232

You can modify it and link a new kernel. But be carefull, the driver is perhaps not supporting this modification.

Cheers.

[Thayanidhi]

Hi,

First of all why you want to change major no.
Major assigned by the system when it is configured.

Major number
Identifies the kernel driver used for I/O
Instructs HP-UX how to conduct the I/O

If you change it may not function.
If you want to test, create a new device file
using mknod command.

TT