LSM skeleton module printk message not showing in dmesg

[toqeer ali]

Hi Mosta,

Thanks for the prompt reply, I added the same printk message in the other
kernel files like here /usr/src/linux-2.6.33.3/init/calibrate.c

       int lps_precision = LPS_PREC;
       printk("*** Just testing prinkt to work ***\n");
       static bool printed;

and recompiled the kernel and its showing in the dmesg. Is this means kernel
logger is fine?

also can please verify the steps i made to make lsm module just for pirnkt
message.

Regards

On Fri, May 20, 2011 at 1:56 PM, mosta <mosta.me at googlemail.com> wrote:

> you have to check at what level you're kernel logger is and set it to
> the according level.
>
>
> greetings mosta
>
> On 05/20/11 06:29, toqeer ali wrote:
> > Hi All,
> >
> >
> > I am writing a skeleton LSM module to only print the message at boot
> > time, but I could not see any printk message in the dmesg.
> >
> > Below are steps i did to enable the printk messages in the LSM module.
> >
> >  What i did is download linux kernel 2.6.33.3.
> >
> > 1) added  the line source security/lsmcustommod/Kconfig        in
> > linuxsrc/security/Kconfig near ima/Kconfig.
> > 2) added "subdir-$(CONFIG_SECURITY_LSMCUSTOMMOD)         +=
> > lsmcustommod" line at linuxsrc/security/Makefile
> > 3) created a directory in linuxsrc/security/lsmcustommod and putted
> > three files
> >
> >             i) lsmcustommod.c
> >            ii) Kconfig
> >            iii) Makefile
> >
> > *Kconfig file contents*
> >
> > config SECURITY_LSMCUSTOMMOD
> >         bool "LSMCUSTOMMOD Support"
> >         depends on SECURITY
> >         select NETWORK_SECMARK
> >         default n
> >         help
> >
> > *Makefile Contents*
> >
> > obj-$(CONFIG_SECURITY_LSMCUSTOMMOD) := lsmcustommod.o
> >
> > *lsmcustommod.c* contents
> >
> > static __init lsmcustommod_init(void){
> >         /* register the hooks */
> >
> >         if (register_security(&lsmcustommod_ops))
> >                 panic("lsmcustommod: Unable to register lsmcustommod
> > with kernel.\n");
> >         else
> >                 printk("lsmcustommod: registered with the kernel\n");
> >
> >         return 0;
> > }
> >
> > static void __exit lsmcustommod_exit (void)
> > {
> >         return;
> > }
> >
> >
> >
> > module_init (lsmcustommod_init);
> > module_exit (lsmcustommod_exit);
> >
> > MODULE_DESCRIPTION("lsmcustommod");
> > MODULE_LICENSE("GPL");
> > #endif /* CONFIG_SECURITY_LSMCUSTOMMOD */
> >
> >
> >
> > After that I also added some return 0 and printk statments in the
> > lsmcustommod_ops stucture.
> >
> > lastly  disabled all modules in make menuconfig and select LSMCUTOMMOD
> > in security sections of the menufile and compile the kernel by the
> > following command.
> >
> > make && make modules && make modules_install && make install
> > updategrub2
> >
> >
> > --
> > Toqeer Ali Syed
> >
> > Red Hat Certified Engineer
> >
> > mob:     +60166205504 <tel:%2B60166205504>
> > mob:     +92 321 9059916 <tel:%2B92%20321%209059916>
> >
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>


-- 
Toqeer Ali Syed

Red Hat Certified Engineer

mob:     +60166205504
mob:     +92 321 9059916
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