I need to write messages > 1023 characters long to the console from a module*. 
printk() is limited to 1023 characters, and splitting the message over several 
printk()'s results in a line break and "Month hh:mm:ss host kernel:" being 
inserted in my text.

I tried including <linux/console.h> and using the console_drivers declared 
there, but get
"WARNING: "console_drivers" [<path>/log.ko] undefined!" when compiling and
"insmod: error inserting 'log.ko': -1 Unknown symbol in module" when insmodding.

I guess this is because non EXPORT_SYMBOL'd symbols are only accessible to 
statically linked code, and not to modules? I see in printk.c that 
console_drivers is set up there, and I haven't been able to find any other 
interface to console_drivers.

In short: is there any way to print messages to the console from a kernel 
module, except printk()? Is opening /dev/tty and writing to it the way to go?


* I'm writing an in-memory logger to be included in a module. The log can be 
several megabytes. The idea is to use SysRq to print the contents of the log to 
console after a kernel panic or otherwise when writing to disk might not work.

-- 
Arvid Brodin
Enea LCC
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to