diff options
Diffstat (limited to 'lib/libc/sys/semget.2')
| -rw-r--r-- | lib/libc/sys/semget.2 | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/lib/libc/sys/semget.2 b/lib/libc/sys/semget.2 index 00863ab13c5..b22f85bf4c4 100644 --- a/lib/libc/sys/semget.2 +++ b/lib/libc/sys/semget.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: semget.2,v 1.5 1998/07/20 07:37:24 deraadt Exp $ +.\" $OpenBSD: semget.2,v 1.6 1999/05/25 13:06:47 aaron Exp $ .\" $NetBSD: semget.2,v 1.2 1997/03/27 08:20:41 mikel Exp $ .\" .\" Copyright (c) 1995 Frank van der Linden @@ -47,7 +47,7 @@ The .Fn semget system call returns the semaphore identifier associated with .Fa key . - +.Pp A new set containing .Fa nsems semaphores is created if either @@ -56,26 +56,25 @@ is equal to IPC_PRIVATE, or .Fa key does not have a semaphore set associated with it and the IPC_CREAT bit is set in -.Fa semflg. - +.Fa semflg . +.Pp The access modes of the created semaphores is specified in .Fa semflg by .Em or Ns 'ing -the following values +the following values: .Pp .Bd -literal -offset indent -compact SEM_A alter permission for owner SEM_R read permission for owner - +.Pp SEM_A >> 3 alter permission for group SEM_R >> 3 read permission for group - +.Pp 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 .Va semid_ds @@ -87,12 +86,12 @@ is intialized as follows: .Va sem_perm.cuid and .Va sem_perm.uid -are set to the effective uid of the calling process. +are set to the effective UID of the calling process. .It .Va sem_perm.gid and .Va sem_perm.cgid -are set to the effective gid of the calling process. +are set to the effective GID of the calling process. .It .Va sem_perm.mode is set to the lower 9 bits of @@ -118,7 +117,7 @@ is set to reflect the error. .Bl -tag -width Er .It Bq Er EACCES The caller has no permission to access a semaphore set already associated with -.Fa key. +.Fa key . .It Bq Er EEXIST Both IPC_CREAT and IPC_EXCL are set in .Fa semflg , @@ -128,7 +127,7 @@ and a semaphore set is already associated with .Va nsems is less than 0 or greater than the system limit for the number in a semaphore set. - +.Pp A semaphore set associated with .Fa key exists, but has fewer semaphores than the number specified in |