From: ts <decoux@...>
Date: 2002-01-24T19:13:32+09:00
Subject: Re: SysV::IPC, core dump

>>>>> "a" == ara howard <ahoward@fsl.noaa.gov> writes:

a> regarding the msgbuf struct - are you saying that you've had problems
a> with that as well? 

 Yes, here the problem when I try to compile it

moulon% make
gcc -fPIC -g -O2  -I/usr/local/lib/ruby/1.6/sparc-solaris2.7 -I. -I/usr/local/include -DHAVE_SYS_TYPES_H -DHAVE_SYS_IPC_H -DHAVE_SYS_MSG_H -DHAVE_MSGGET -DHAVE_SYS_SEM_H -DHAVE_SEMGET -DHAVE_SYS_SHM_H -DHAVE_SHMGET   -c -o sysvipc.o sysvipc.c
sysvipc.c:54: redefinition of `struct msgbuf'
make: *** [sysvipc.o] Error 1
moulon% 

 and if you look at msgsnd(2) the example given is (see the name of struct)

     The msgp argument points to a user-defined buffer that  must
     contain first a field of type long int that will specify the
     type of the message, and then a data portion that will  hold
     the  data  bytes  of  the message. The structure below is an
     example of what this user-defined buffer might look like:

      struct  mymsg {
             long  mtype;     /* message type */
             char  mtext[1];  /* message text */
     }

 Normally the name of msgbuf must be renamed in sysvipc.c


Guy Decoux