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Don't use vaccess() here.

This commit is contained in:
mycroft 1997-05-08 17:16:15 +00:00
parent ae5d73b594
commit 8e39ee9dad
1 changed files with 32 additions and 7 deletions
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39
sys/kern/sysv_ipc.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sysv_ipc.c,v 1.11 1997/05/08 17:08:31 mycroft Exp $ */
/* $NetBSD: sysv_ipc.c,v 1.12 1997/05/08 17:16:15 mycroft Exp $ */
/*
* Copyright (c) 1995 Charles M. Hannum. All rights reserved.
@ -36,6 +36,7 @@
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/stat.h>
/*
* Check for ipc permission
@ -47,17 +48,41 @@ ipcperm(cred, perm, mode)
struct ipc_perm *perm;
int mode;
{
mode_t mask;
if (cred->cr_uid == 0)
return (0);
if (mode == IPC_M) {
if (cred->cr_uid == 0 ||
cred->cr_uid == perm->uid ||
if (cred->cr_uid == perm->uid ||
cred->cr_uid == perm->cuid)
return (0);
return (EPERM);
}
if (vaccess(VNON, perm->mode, perm->uid, perm->gid, mode, cred) == 0 ||
vaccess(VNON, perm->mode, perm->cuid, perm->cgid, mode, cred) == 0)
return (0);
return (EACCES);
mask = 0;
if (cred->cr_uid == perm->uid ||
cred->cr_uid == perm->cuid) {
if (mode & IPC_R)
mask |= S_IRUSR;
if (mode & IPC_W)
mask |= S_IWUSR;
return ((perm->mode & mask) == mask ? 0 : EACCES);
}
if (cred->cr_gid == perm->gid || groupmember(perm->gid, cred) ||
cred->cr_gid == perm->cgid || groupmember(perm->cgid, cred)) {
if (mode & IPC_R)
mask |= S_IRGRP;
if (mode & IPC_W)
mask |= S_IWGRP;
return ((perm->mode & mask) == mask ? 0 : EACCES);
}
if (mode & IPC_R)
mask |= S_IROTH;
if (mode & IPC_W)
mask |= S_IWOTH;
return ((perm->mode & mask) == mask ? 0 : EACCES);
}