SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)



     NAME
     NAME
     NAME
     NAME
          shmop - shared memory operations

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

          char *shmat(shmid, shmaddr, shmflg)
          int shmid;
          char *shmaddr;
          int shmflg;

          int shmdt(shmid)
          char *shmid;

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

     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
          Shmat attaches the shared memory segment associated with the
          shared memory identifier specified by shmid to the shared
          data segment of the calling process.  Shmaddr must be 0, and
          the shared memory segment is attached at an address selected
          by the system.

          The segment is attached for reading and writing in all
          cases.

          Shmdt detaches from the calling process's data segment the
          shared memory segment specified by the shared memory
          identifier shmid.

     RETURN VALUES
     RETURN VALUES
     RETURN VALUES
     RETURN VALUES
          Upon successful completion, the return value of the shmat
          call is the user address at which the shared memory segment
          was attached.  The return value of a successful shmdt call
          is 0.

     ERRORS
     ERRORS
     ERRORS
     ERRORS
          Shmat will not attach to a shared memory segment, will
          return -1, and will set errno if:

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

               Shmaddr is not equal to 0 [EINVAL].

          Shmdt will fail, return -1, and set errno if:

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

     SEE ALSO
     SEE ALSO
     SEE ALSO
     SEE ALSO



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






     SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)
     SHMOP(2)                 HP Integral PC                  SHMOP(2)



          shmget(2), shmop(2), brk(2)

     NOTES
     NOTES
     NOTES
     NOTES
          The shared memory attach location (return value of shmat
          call) may no longer be valid following a call to brk(2) or
          sbrk(2).

















































     Hewlett-Packard               - 2 -            (printed 12/12/84)