Bug: on recent 32-bit-kernels uid_t is 16 Bit instead of 32 Bit

Hi,

this was detected when a username wasn't properly mapped from name to uid 
with getpwname_r.
The uid was something about 150000, but uid_t did hold only 16 bits. It 
did luckily fail because the remainder 16 bit uid was not valid. :-)

At no point in header hierarchy I found a matching include of a 
appropriate kernel header file.
The static defines of i386 => uid16_t and x86_64 => uint32_t in 
dietlibc's header file doesn't respect linux 2.6 32 bit.

Test:

root@mon:~ > cat test_uid_t.c 
#include <pwd.h>
#include <stdio.h>
main() {
  printf("sizeof(uid_t) %d\n",sizeof(uid_t));
}
root@mon:~ > gcc -o test_uid_t_glibc test_uid_t.c 
root@mon:~ > diet gcc -o test_uid_t_diet test_uid_t.c 
root@mon:~ > ./test_uid_t_glibc 
sizeof(uid_t) 4
root@mon:~ > ./test_uid_t_diet  
sizeof(uid_t) 2
root@mon:~ > uname -a
Linux mon 2.6.23.12 #2 SMP Tue Jan 8 14:02:49 CET 2008 i686 GNU/Linux

best regards,
Frank


EDV Frank Bergmann                           Tel.     05221-9249753
LPIC-2 Linux Professional                    Fax      05221-9249754
Elverdisser Str. 25                          email    [email protected]
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