[LTP] [PATCH] msgctl02: correct wrong FAIL result when msgmnb is larger than 65536

[Seiichi I. <s.i...@jp...>]

Hi,

I report a bug of the msgctl02 testcase and a patch for it.

When you set /proc/sys/kernel/msgmnb to a value larger than 65536,
msgctl02 always results FAIL because of a bug itself.
An example when /proc/sys/kernel/msgmnb == 4194304,

# cd ./testcases/kernel/syscalls/ipc/msgctl
# ./msgctl02
msgctl02    1  FAIL  :  qs_buf.msg_qbytes value is not expected
msgctl02    0  INFO  :  expected - 65535, received - 4194303
# 

This is because the variable "new_bytes" storing "expected" value above
is defined as "unsigned short" type and cannot hold a value
larger than 65535. It should be "msglen_t" type as same as the
member msg_qnum of struct msqid_ds, but msg_qnum seems to be declared
as "unsigned long int" type on some architecture like ia64,
I recommend you to use "unsigned long int" for new_bytes.

Signed-off-by: Seiichi Ikarashi <s.i...@jp...>
---
===================================================================
--- old/testcases/kernel/syscalls/ipc/msgctl/msgctl02.c	2002-11-19 04:54:58.000000000 +0900
+++ new/testcases/kernel/syscalls/ipc/msgctl/msgctl02.c	2008-12-10 15:23:43.000000000 +0900
@@ -69,7 +69,7 @@ int msg_q_1 = -1;                      /
 
 struct msqid_ds qs_buf;
 
-unsigned short new_bytes;
+unsigned long int new_bytes;
 
 int main(int ac, char **av)
 {