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For consistency with other implementations, check for the existence

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of the segment before checking its permissions.

PR:		kern/11999
Submitted by:	Brooks Davis <brooks@one-eyed-alien.net>
This commit is contained in:
Alan Cox 1999-06-19 23:53:13 +00:00
parent 5868a099d9
commit dc92aa57fd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=48039
1 changed files with 3 additions and 3 deletions
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6
sys/kern/sysv_shm.c
View File

@ -1,4 +1,4 @@
/* $Id: sysv_shm.c,v 1.40 1999/01/21 08:29:04 dillon Exp $ */
/* $Id: sysv_shm.c,v 1.41 1999/04/27 12:21:09 phk Exp $ */
/* $NetBSD: sysv_shm.c,v 1.23 1994/07/04 23:25:12 glass Exp $ */
/*
@ -441,13 +441,13 @@ shmget_existing(p, uap, mode, segnum)
return error;
return EAGAIN;
}
if ((uap->shmflg & (IPC_CREAT | IPC_EXCL)) == (IPC_CREAT | IPC_EXCL))
return EEXIST;
error = ipcperm(p, &shmseg->shm_perm, mode);
if (error)
return error;
if (uap->size && uap->size > shmseg->shm_segsz)
return EINVAL;
if ((uap->shmflg & (IPC_CREAT | IPC_EXCL)) == (IPC_CREAT | IPC_EXCL))
return EEXIST;
p->p_retval[0] = IXSEQ_TO_IPCID(segnum, shmseg->shm_perm);
return 0;
}