isalnum not working - 2.0.23
Mon, 28 Oct 1996 10:01:01 -0700 (EST)

We got a problem here, I do not know if it is a kernel bug,
but it started happening after an update from 2.0.21 to 2.0.23,
and the only thing changed on that machine is the kernel.

# include <ctype.h>

int c;

c = 'e';
printf("%d\n", isalnum(c));

Should produce 1, did so with 2.0.21, produces 0 on 23.

I would appreciate help in this matter via email, its a production
machine and we need it, and rebooting is not easy because of long
running jobs..

add. info: libc-5.4.7 but it worked fine with 5.4.7 and kernel 21

Olaf Schnapauff, Mountain View Towers #8427, Logan Utah 84321, USA
phone (801) 797-6123, email 
(alternatives if needed:,,
Utah State University, Department of Computer Science