Update for XSH5.
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thorpej
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@ -1,4 +1,4 @@
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.\" $NetBSD: shmat.2,v 1.8 1999/03/22 19:45:09 garbled Exp $
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.\" $NetBSD: shmat.2,v 1.9 1999/08/25 21:12:54 thorpej Exp $
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.\"
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.\" Copyright (c) 1995 Frank van der Linden
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.\" All rights reserved.
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@ -29,7 +29,7 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 17, 1995
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.Dd August 25, 1999
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.Dt SHMAT 2
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.Os
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.Sh NAME
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@ -37,8 +37,6 @@
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.Nm shmdt
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.Nd map/unmap shared memory
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/ipc.h>
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.Fd #include <sys/shm.h>
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.Ft void *
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.Fn shmat "int shmid" "const void *shmaddr" "int shmflg"
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@ -123,3 +121,13 @@ is not the start address of a mapped shared memory segment.
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.Xr mmap 2 ,
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.Xr shmctl 2 ,
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.Xr shmget 2
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.Sh STANDARDS
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The
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.Nm shmat
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and
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.Nm shmdt
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system calls conform to
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.St -xsh5 .
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.Sh HISTORY
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Shared memory segments appeared in the first release of
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.At V .
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@ -1,4 +1,4 @@
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.\" $NetBSD: shmctl.2,v 1.7 1999/03/22 19:45:09 garbled Exp $
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.\" $NetBSD: shmctl.2,v 1.8 1999/08/25 21:12:54 thorpej Exp $
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.\"
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.\" Copyright (c) 1995 Frank van der Linden
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.\" All rights reserved.
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@ -29,67 +29,50 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 17, 1995
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.Dd August 25, 1999
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.Dt SHMCTL 2
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.Os
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.Sh NAME
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.Nm shmctl
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.Nd shared memory control operations
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/ipc.h>
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.Fd #include <sys/shm.h>
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.Ft int
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.Fn shmctl "int shmid" "int cmd" "struct shmid_ds *buf"
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.Sh DESCRIPTION
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The
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.Fn shmctl
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system call performs some control operations on the shared memory area
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system call performs control operations on the shared memory segment
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specified by
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.Fa shmid .
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.Pp
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Each shared memory segment has a data structure associated with it,
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parts of which may be altered by
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.Fn shmctl
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and parts of which determine the actions of
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.Fn shmctl .
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.Pp
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This structure is defined as follows in
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.Aq Pa sys/shm.h :
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Each shared memory segment has a
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.Sy shmid_ds
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structure associated with it which contains the following members:
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.Bd -literal
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struct shmid_ds {
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struct ipc_perm shm_perm; /* operation permissions */
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int shm_segsz; /* size of segment in bytes */
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pid_t shm_lpid; /* pid of last shm op */
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pid_t shm_cpid; /* pid of creator */
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short shm_nattch; /* # of current attaches */
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time_t shm_atime; /* last shmat() time*/
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time_t shm_dtime; /* last shmdt() time */
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time_t shm_ctime; /* last change by shmctl() */
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void *shm_internal; /* sysv stupidity */
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};
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struct ipc_perm shm_perm; /* operation permissions */
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size_t shm_segsz; /* size of segment in bytes */
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pid_t shm_lpid; /* pid of last shm op */
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pid_t shm_cpid; /* pid of creator */
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shmatt_t shm_nattch; /* # of current attaches */
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time_t shm_atime; /* last shmat() time*/
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time_t shm_dtime; /* last shmdt() time */
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time_t shm_ctime; /* last change by shmctl() */
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.Ed
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.Pp
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The
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.Bf -literal
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ipc_perm
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.Ef
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.Sy ipc_perm
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structure used inside the
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.Bf -literal
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shmid_ds
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.Ef
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.Sy shmid_ds
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structure is defined in
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.Aq Pa sys/ipc.h
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and looks like this:
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and contains the following members:
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.Bd -literal
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struct ipc_perm {
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ushort cuid; /* creator user id */
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ushort cgid; /* creator group id */
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ushort uid; /* user id */
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ushort gid; /* group id */
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ushort mode; /* r/w permission (see chmod(2)) */
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ushort seq; /* sequence # (to generate unique msg/sem/shm id) */
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key_t key; /* user specified msg/sem/shm key */
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};
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uid_t cuid; /* creator user id */
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gid_t cgid; /* creator group id */
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uid_t uid; /* user id */
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gid_t gid; /* group id */
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mode_t mode; /* permission (lower 9 bits) */
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.Ed
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.Pp
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The operation to be performed by
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@ -189,3 +172,11 @@ specifies an invalid address.
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.Sh SEE ALSO
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.Xr shmat 2 ,
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.Xr shmget 2
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.Sh STANDARDS
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The
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.Nm
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system call conforms to
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.St -xsh5 .
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.Sh HISTORY
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Shared memory segments appeared in the first release of
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.At V .
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@ -1,4 +1,4 @@
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.\" $NetBSD: shmget.2,v 1.6 1999/03/22 19:45:09 garbled Exp $
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.\" $NetBSD: shmget.2,v 1.7 1999/08/25 21:12:54 thorpej Exp $
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.\"
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.\" Copyright (c) 1995 Frank van der Linden
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.\" All rights reserved.
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@ -29,15 +29,13 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 17, 1995
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.Dd August 25, 1999
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.Dt SHMGET 2
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.Os
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.Sh NAME
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.Nm shmget
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.Nd get shared memory area identifier
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.Nd get shared memory segment
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/ipc.h>
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.Fd #include <sys/shm.h>
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.Ft int
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.Fn shmget "key_t key" "size_t size" "int shmflg"
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@ -132,3 +130,11 @@ requested size.
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.Xr mmap 2 ,
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.Xr shmat 2 ,
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.Xr shmctl 2
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.Sh STANDARDS
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The
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.Nm
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system call conforms to
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.St -xsh5 .
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.Sh HISTORY
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Shared memory segments appeared in the first release of
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.At V .
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