diff options
author | Michael I. Bushnell <mib@gnu.org> | 1994-06-22 20:41:31 +0000 |
---|---|---|
committer | Michael I. Bushnell <mib@gnu.org> | 1994-06-22 20:41:31 +0000 |
commit | dbc6a83644299780fbb0adc89bef5c613ec8c818 (patch) | |
tree | eff0be7488900bd29a48b70896bc208f718e1236 | |
parent | 7d76d92b5d2bfc29a2fa5179ad4f10a4417f70e5 (diff) |
Formerly fsys-getroot.c.~9~
-rw-r--r-- | libtrivfs/fsys-getroot.c | 35 |
1 files 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); |