SEM_R and SEM_A userland accessable as required; michaels@inet.no

2 files changed, 33 insertions, 13 deletions

diff --git a/lib/libc/sys/semget.2 b/lib/libc/sys/semget.2
index 5a337b6f27b..00863ab13c5 100644
--- a/lib/libc/sys/semget.2
+++ b/lib/libc/sys/semget.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: semget.2,v 1.4 1997/11/24 02:07:32 deraadt Exp $
+.\"	$OpenBSD: semget.2,v 1.5 1998/07/20 07:37:24 deraadt Exp $
 .\"	$NetBSD: semget.2,v 1.2 1997/03/27 08:20:41 mikel Exp $
 .\"
 .\" Copyright (c) 1995 Frank van der Linden
@@ -54,9 +54,27 @@ semaphores is created if either
 .Fa key
 is equal to IPC_PRIVATE, or
 .Fa key
-does not have a semaphore set associated with it, and the IPC_CREAT bit is
+does not have a semaphore set associated with it and the IPC_CREAT bit is
 set in
-.Fa msgflg.
+.Fa semflg.
+
+The access modes of the created semaphores is specified in
+.Fa semflg
+by
+.Em or Ns 'ing
+the following values
+.Pp
+.Bd -literal -offset indent -compact
+SEM_A        alter permission for owner
+SEM_R        read permission for owner
+
+SEM_A >> 3   alter permission for group
+SEM_R >> 3   read permission for group
+
+SEM_A >> 6   alter permission for other
+SEM_R >> 6   read permission for other
+.Ed
+.Pp
 
 If a new set of semaphores is created, the data structure associated with it
 (the
@@ -78,7 +96,7 @@ are set to the effective gid of the calling process.
 .It
 .Va sem_perm.mode
 is set to the lower 9 bits of
-.Fa msgflg .
+.Fa semflg .
 .It
 .Va sem_nsems
 is set to the value of
@@ -103,7 +121,7 @@ The caller has no permission to access a semaphore set already associated with
 .Fa key.
 .It Bq Er EEXIST
 Both IPC_CREAT and IPC_EXCL are set in
-.Fa msgflg ,
+.Fa semflg ,
 and a semaphore set is already associated with
 .Fa key .
 .It Bq Er EINVAL
@@ -121,7 +139,7 @@ for the number of semaphores or the number of semaphore sets has been
 reached.
 .It Bq Er ENOENT
 IPC_CREAT was not set in
-.Fa msgflg
+.Fa semflg
 and no semaphore set associated with
 .Fa key
 was found.
diff --git a/sys/sys/sem.h b/sys/sys/sem.h
index 6fca814e76d..45d53039830 100644
--- a/sys/sys/sem.h
+++ b/sys/sys/sem.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sem.h,v 1.6 1998/06/11 19:21:29 deraadt Exp $	*/
+/*	$OpenBSD: sem.h,v 1.7 1998/07/20 07:37:22 deraadt Exp $	*/
 /*	$NetBSD: sem.h,v 1.8 1996/02/09 18:25:29 christos Exp $	*/
 
 /*
@@ -79,12 +79,6 @@ union semun {
 #define SETVAL	8	/* Set the value of semval to arg.val {ALTER} */
 #define SETALL	9	/* Set semvals from arg.array {ALTER} */
 
-#ifdef _KERNEL
-/*
- * Kernel implementation stuff
- */
-#define SEMVMX	32767		/* semaphore maximum value */
-#define SEMAEM	16384		/* adjust on exit max value */
 
 /*
  * Permissions
@@ -92,6 +86,14 @@ union semun {
 #define SEM_A		0200	/* alter permission */
 #define SEM_R		0400	/* read permission */
 
+
+#ifdef _KERNEL
+/*
+ * Kernel implementation stuff
+ */
+#define SEMVMX	32767		/* semaphore maximum value */
+#define SEMAEM	16384		/* adjust on exit max value */
+
 /*
  * Undo structure (one per process)
  */