From dbc6a83644299780fbb0adc89bef5c613ec8c818 Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Wed, 22 Jun 1994 20:41:31 +0000
Subject: Formerly fsys-getroot.c.~9~
---
libtrivfs/fsys-getroot.c | 35 ++++++++++++++++++++++++++++-------
1 file changed, 28 insertions(+), 7 deletions(-)
diff --git a/libtrivfs/fsys-getroot.c b/libtrivfs/fsys-getroot.c
index e2fcc76a..efc820ac 100644
--- a/libtrivfs/fsys-getroot.c
+++ b/libtrivfs/fsys-getroot.c
@@ -36,20 +36,39 @@ trivfs_S_fsys_getroot (struct trivfs_control *cntl,
mach_msg_type_name_t *newpttype)
{
struct trivfs_protid *cred;
+ mach_port_t new_realnode;
+ error_t err;
+ int perms;
int i;
if (!cntl)
return EOPNOTSUPP;
- assert (!trivfs_support_read && !trivfs_support_write
- && !trivfs_support_exec);
-
- if (flags & (O_READ|O_WRITE|O_EXEC))
+ if (((flags & O_READ) && !trivfs_support_read)
+ || ((flags & O_WRITE) && !trivfs_support_write)
+ || ((flags & O_EXEC) && !trivfs_support_exec))
{
ports_done_with_port (cntl);
return EACCES;
}
-
+
+ /* O_CREAT and O_EXCL are not meaningful here; O_NOLINK and O_NOTRANS
+ will only be useful when trivfs supports translators (which it doesn't
+ now). */
+ flags &= O_HURD;
+ flags &= ~(O_CREAT|O_EXCL|O_NOLINK|O_NOTRANS);
+
+ io_restrict_auth (cntl->underlying, &new_realnode,
+ uids, nuids, gids, ngids);
+ file_check_access (new_realnode, &perms);
+ if ((flags & (O_READ|O_WRITE|O_EXEC) & perms)
+ != (flags & (O_READ|O_WRITE|O_EXEC)))
+ {
+ mach_port_deallocate (mach_task_self (), new_realnode);
+ ports_done_with_port (cntl);
+ return EACCES;
+ }
+
cred = ports_allocate_port (sizeof (struct trivfs_protid),
cntl->protidtypes);
cred->isroot = 0;
@@ -62,16 +81,18 @@ trivfs_S_fsys_getroot (struct trivfs_control *cntl,
bcopy (gids, cred->gids, ngids * sizeof (uid_t));
cred->nuids = nuids;
cred->ngids = ngids;
+ cred->hook = 0;
cred->po = malloc (sizeof (struct trivfs_peropen));
cred->po->refcnt = 1;
cred->po->cntl = cntl;
+ cred->po->openmodes = (flags & ~O_NONBLOCK);
+ cred->po->hook = 0;
ports_port_ref (cntl);
if (trivfs_peropen_create_hook)
(*trivfs_peropen_create_hook) (cred->po);
- io_restrict_auth (cred->po->cntl->underlying, &cred->realnode,
- uids, nuids, gids, ngids);
+ cred->realnode = new_realnode;
if (trivfs_protid_create_hook)
(*trivfs_protid_create_hook) (cred);
--
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