SHMCTL(2)                HP Integral PC                 SHMCTL(2)
     SHMCTL(2)                HP Integral PC                 SHMCTL(2)
     SHMCTL(2)                HP Integral PC                 SHMCTL(2)
     SHMCTL(2)                HP Integral PC                 SHMCTL(2)



     NAME
     NAME
     NAME
     NAME
          shmctl - shared memory control operations

     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
          #include <sys/types.h>
          #include <sys/shm.h>

          int shmctl(shmid, cmd, buf)
          int shmid, cmd;
          struct shmid_ds *buf;

     HP-UX COMPATABILITY
     HP-UX COMPATABILITY
     HP-UX COMPATABILITY
     HP-UX COMPATABILITY
          Level:  HP-UX/RT
          Origin: UCB

     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
          Shmctl provides a variety of shared memory control
          operations as specified by cmd.  The following cmds are
          available:

               IPC_STAT
               Place the current value of each member of the data
               structure associated with shmid into the structure
               pointed to by buf.

               IPC_SET
               Set the values of the shm_prem.uid, shm_perm.gid, and
               shm_perm.mode members of the data structure associated
               with shmid to the corresponding values found in the
               structure pointed to by buf.

               IPC_RMID
               Remove the shared memory identifier specified by shmid
               from the system and destroy the shared memory segment
               associated with it.

     ERRORS
     ERRORS
     ERRORS
     ERRORS
          Shmctl will return -1 and errno will be set if:

               Shmid is not a valid shared memory identifier [EINVAL].

               Cmd is not a valid command [EINVAL].

               Buf points to an illegal address [EFAULT].

     SEE ALSO
     SEE ALSO
     SEE ALSO
     SEE ALSO
          shmget(2), shmop(2)








     Hewlett-Packard               - 1 -            (printed 12/12/84)