xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / man / man2 / semget.2

diff --git a/bsd/man/man2/semget.2 b/bsd/man/man2/semget.2
index 47ef04913f8bf72def01019ed2e275aa5af01e7d..03f30464f204c5973db23fd8f105302523727ab0 100644 (file)
--- a/bsd/man/man2/semget.2
+++ b/bsd/man/man2/semget.2
@@ -31,19 +31,19 @@
 .Sh NAME
 .Nm semget
 .Nd obtain a semaphore id
 .Sh NAME
 .Nm semget
 .Nd obtain a semaphore id

-.Sh LIBRARY
-.Lb libc

 .Sh SYNOPSIS
 .Sh SYNOPSIS

-.In sys/types.h
-.In sys/ipc.h

 .In sys/sem.h
 .Ft int
 .In sys/sem.h
 .Ft int

-.Fn semget "key_t key" "int nsems" "int flag"
+.Fo semget
+.Fa "key_t key"
+.Fa "int nsems"
+.Fa "int semflg"
+.Fc

 .Sh DESCRIPTION
 Based on the values of
 .Fa key
 and
 .Sh DESCRIPTION
 Based on the values of
 .Fa key
 and

-.Fa flag ,
+.Fa semflg ,

 .Fn semget
 returns the identifier of a newly created or previously existing
 set of semaphores.
 .Fn semget
 returns the identifier of a newly created or previously existing
 set of semaphores.


@@ -63,7 +63,7 @@ An integer constant may be specified.  If no IPC object corresponding
 to
 .Fa key
 is specified and the IPC_CREAT bit is set in
 to
 .Fa key
 is specified and the IPC_CREAT bit is set in

-.Fa flag ,
+.Fa semflg ,

 a new one will be created.
 .It
 The
 a new one will be created.
 .It
 The


@@ -78,7 +78,7 @@ may be used to generate a key from a pathname.
 The mode of a newly created IPC object is determined by
 .Em OR Ns 'ing
 the following constants into the
 The mode of a newly created IPC object is determined by
 .Em OR Ns 'ing
 the following constants into the

-.Fa flag
+.Fa semflg

 argument:
 .Bl -tag -width XSEM_WXX6XXX
 .It Dv SEM_R
 argument:
 .Bl -tag -width XSEM_WXX6XXX
 .It Dv SEM_R


@@ -115,32 +115,58 @@ The
 system call
 will fail if:
 .Bl -tag -width Er
 system call
 will fail if:
 .Bl -tag -width Er

+.\" ===========

 .\" ipcperm could fail (we're opening to read and write, as it were)
 .It Bq Er EACCES
 Access permission failure.
 .\" ipcperm could fail (we're opening to read and write, as it were)
 .It Bq Er EACCES
 Access permission failure.

+.\" ===========

 .\"
 .\"

-.\" sysv_sem.c is quite explicit about these, so I'm pretty sure
-.\" this is accurate
+.\" sysv_sem.c is quite explicit about these,
+.\" so I'm pretty sure this is accurate

 .\"
 .It Bq Er EEXIST
 .\"
 .It Bq Er EEXIST

-IPC_CREAT and IPC_EXCL were specified, and a semaphore set
-corresponding to
+IPC_CREAT and IPC_EXCL were specified,
+and a semaphore set corresponding to

 .Fa key
 already exists.
 .Fa key
 already exists.

+.\" ===========
+.It Bq Er EINVAL
+The number of semaphores requested
+is either less than 1 or greater than the system imposed maximum per set.
+.\" ===========

 .It Bq Er EINVAL
 .It Bq Er EINVAL

-The number of semaphores requested exceeds the system imposed maximum
-per set.
+A semaphore identifier exists for the argument key,
+but the number of semaphores in the set associated with it
+is less than
+.Fa nsems ,
+and
+.Fa nsems
+is non-zero.
+.\" ===========
+.It Bq Er ENOENT
+No semaphore set was found corresponding to
+.Fa key ,
+and IPC_CREAT was not specified.
+.\" ===========

 .It Bq Er ENOSPC
 Insufficiently many semaphores are available.
 .It Bq Er ENOSPC
 Insufficiently many semaphores are available.

+.\" ===========

 .It Bq Er ENOSPC
 The kernel could not allocate a
 .Fa "struct semid_ds" .
 .It Bq Er ENOSPC
 The kernel could not allocate a
 .Fa "struct semid_ds" .

-.It Bq Er ENOENT
-No semaphore set was found corresponding to
-.Fa key ,
-and IPC_CREAT was not specified.

 .El
 .El

+.Sh LEGACY SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <sys/ipc.h>
+.Fd #include <sys/sem.h>
+.Pp
+The include files
+.In sys/types.h
+and
+.In sys/ipc.h
+are necessary.

 .Sh SEE ALSO
 .Xr semctl 2 ,
 .Xr semop 2 ,
 .Sh SEE ALSO
 .Xr semctl 2 ,
 .Xr semop 2 ,

-.Xr ftok 3
+.Xr ftok 3 ,
+.Xr compat 5