I report a problem about shmget(). (I'm using FreeBSD-2.1.0R)

int shmget(key_t key, int size, int shmflg);

If the 'key' has already existed in the system and set 'shmflg'
as '(IPC_CREAT|IPC_EX

I report a problem about shmget(). (I'm using FreeBSD-2.1.0R)

int shmget(key_t key, int size, int shmflg);

If the 'key' has already existed in the system and set 'shmflg'
as '(IPC_CREAT|IPC_EXC)', then shmget() must return the error 'EEXIST'.

Submitted by: m_tanaka@pa.yokogawa.co.jp (Mihoko Tanaka)

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Update sysv_*.c to get their argument definitions from sysproto.h

A Major staticize sweep. Generates a couple of warnings that I'll deal
with later.
A number of unused vars removed.
A number of unused procs removed or #ifdefed.

Untangled the vm.h include file spaghetti.

Close PR: kern/865
Submitted by: Juergen Lock <nox@jelal.hb.north.de>

Submitted by: jb@cimlogic.com.au (John Birrell)
Obtained from: NetBSD as well (He submitted it there too)

make sure that teh shm region is beyond the sum of the text and data segs
as it was big pro

Submitted by: jb@cimlogic.com.au (John Birrell)
Obtained from: NetBSD as well (He submitted it there too)

make sure that teh shm region is beyond the sum of the text and data segs
as it was big progs could collide with the shm region.

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Start including <sys/sysproto.h> to get the correct args structs and
prototypes for all syscalls. The args structs are still declared in
comments as in VOP implementation functions. I don't like th

Start including <sys/sysproto.h> to get the correct args structs and
prototypes for all syscalls. The args structs are still declared in
comments as in VOP implementation functions. I don't like the
duplication for this, but several more layers of changes are required
to get it right. First we need to catch up with 4.4lite2, which uses
macros to handle struct padding. Then we need to catch up with NetBSD,
which passes the args correctly (as void *). Then we need to handle
varargs functions and struct padding better. I think all the details
can be hidden in machine-generated functions so that the args structs
and verbose macros to reference them don't have to appear in the core
sources.

Add prototypes.

Add bogus casts to hide the evil type puns exposed by the previous
steps. &uap[1] was used to get at the args after the first. This
worked because only the first arg in *uap was declared. This broke
when the machine- genenerated args struct declared all the args
(actually it declares extra args in some cases and depends on the
user stack having some accessible junk after the last arg, not to
mention the user args being on the stack. It isn't possible to
declare a correct args struct for a varargs syscall). The msgsys(),
semsys() and shmsys() syscall interfaces are BAD because they
multiplex several syscalls that have different types of args.
There was no reason to duplicate this sysv braindamage but now
we're stuck with it. NetBSD has reimplemented the syscalls properly
as separate syscalls #220-231.

Declare static functions as static in both their prototype and their
implementation (the latter is optional, and this misfeature was used).

Remove gratuitous #includes.

Continue cleaning up new init stuff.

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Fixed init functions argument type - caddr_t -> void *. Fixed a couple of
compiler warnings.

Fix several sysinit functions that had the wrong type and unnecessarily
external linkage.

Remove useless comments saying that SYSINIT() does system initialization.

shm.c:
Remove nearly useless comm

Fix several sysinit functions that had the wrong type and unnecessarily
external linkage.

Remove useless comments saying that SYSINIT() does system initialization.

shm.c:
Remove nearly useless comment that gave wrong pseudo-prototypes.

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Reviewed by: julian with quick glances by bruce and others
Submitted by: terry (terry lambert)
This is a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports

Reviewed by: julian with quick glances by bruce and others
Submitted by: terry (terry lambert)
This is a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports loadbal modules better
some cleanups in the namei code to help terry in 16-bit character support
some changes to the mount-root code to make it a little more
modular..

NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able
to test those cases..

certainly mounting root of disk still works just fine..
mfs should work but is untested. (tomorrows task)

The low level init stuff includes a total rewrite of init_main.c
to make it possible for new modules to have an init phase by simply
adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can
be added to the kernel without editing any other files other than the
'files' file.

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Eliminate sloppy common-style declarations. There should be none left for
the LINT configuation.

Remove trailing whitespace.

Use of vm_allocate() and vm_deallocate() has been deprecated.

All of this is cosmetic. prototypes, #includes, printfs and so on. Makes
GCC a lot more silent.

Added code for FreeBSD-1.1.5 backwards compatibility.

Added SYSV ipcs.

Obtained from: NetBSD and FreeBSD-1.1.5

Move SysV IPC freebsd32 compat shims from freebsd32_misc.c to corresponding
sysv_{msg,sem,shm}.c files.

Mark SysV IPC freebsd32 syscalls as NOSTD and add required
SYSCALL_INIT_HELPER/SYSCALL32_INIT_

Move SysV IPC freebsd32 compat shims from freebsd32_misc.c to corresponding
sysv_{msg,sem,shm}.c files.

Mark SysV IPC freebsd32 syscalls as NOSTD and add required
SYSCALL_INIT_HELPER/SYSCALL32_INIT_HELPERs to provide auto
register/unregister on module load.

This makes COMPAT_FREEBSD32 functional with SysV IPC compiled and loaded
as modules.

Reviewed by: jhb
MFC after: 2 weeks

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MFC @199204

- Rename tunable kern.ipc.shmmaxpgs to kern.ipc.shmall.
- Explain the fuss when initializing shmmax.

PR: 75542 (mistakenly closed instead of PR 75541)

- MFC

Use the correct cast for the arguments passed to freebsd_shmctl() in
oshmctl().

Submitted by: kib

Tweak the oshmctl() compile fix: convert the K&R definition to ANSI.

oshmctl() now requires a sysv_shm.c-local function prototype.

Change the ABI of some of the structures used by the SYSV IPC API:
- The uid/cuid members of struct ipc_perm are now uid_t instead of unsigned
short.
- The gid/cgid members of struct ipc_perm are n

Change the ABI of some of the structures used by the SYSV IPC API:
- The uid/cuid members of struct ipc_perm are now uid_t instead of unsigned
short.
- The gid/cgid members of struct ipc_perm are now gid_t instead of unsigned
short.
- The mode member of struct ipc_perm is now mode_t instead of unsigned short
(this is merely a style bug).
- The rather dubious padding fields for ABI compat with SV/I386 have been
removed from struct msqid_ds and struct semid_ds.
- The shm_segsz member of struct shmid_ds is now a size_t instead of an
int. This removes the need for the shm_bsegsz member in struct
shmid_kernel and should allow for complete support of SYSV SHM regions
>= 2GB.
- The shm_nattch member of struct shmid_ds is now an int instead of a
short.
- The shm_internal member of struct shmid_ds is now gone. The internal
VM object pointer for SHM regions has been moved into struct
shmid_kernel.
- The existing __semctl(), msgctl(), and shmctl() system call entries are
now marked COMPAT7 and new versions of those system calls which support
the new ABI are now present.
- The new system calls are assigned to the FBSD-1.1 version in libc. The
FBSD-1.0 symbols in libc now refer to the old COMPAT7 system calls.
- A simplistic framework for tagging system calls with compatibility
symbol versions has been added to libc. Version tags are added to
system calls by adding an appropriate __sym_compat() entry to
src/lib/libc/incldue/compat.h. [1]

PR: kern/16195 kern/113218 bin/129855
Reviewed by: arch@, rwatson
Discussed with: kan, kib [1]

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Deprecate the msgsys(), semsys(), and shmsys() system calls by moving
them under COMPAT_FREEBSD[4567]. Starting with FreeBSD 5.0 the SYSV IPC
API was implemented via direct system calls (e.g. msgctl

Deprecate the msgsys(), semsys(), and shmsys() system calls by moving
them under COMPAT_FREEBSD[4567]. Starting with FreeBSD 5.0 the SYSV IPC
API was implemented via direct system calls (e.g. msgctl(), msgget(), etc.)
rather than indirecting through the var-args *sys() system calls. The
shmsys() system call was already effectively deprecated for all but
COMPAT_FREEBSD4 already as its implementation for the !COMPAT_FREEBSD4 case
was to simply invoke nosys().

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