diff options
Diffstat (limited to 'libtrivfs/dir-lookup.c')
| -rw-r--r-- | libtrivfs/dir-lookup.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/libtrivfs/dir-lookup.c b/libtrivfs/dir-lookup.c index cdcfd4be..ff836363 100644 --- a/libtrivfs/dir-lookup.c +++ b/libtrivfs/dir-lookup.c @@ -1,5 +1,5 @@ /* - Copyright (C) 1994 Free Software Foundation + Copyright (C) 1994, 1998 Free Software Foundation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -32,8 +32,41 @@ trivfs_S_dir_lookup (struct trivfs_protid *cred, mach_port_t *retrypt, mach_msg_type_name_t *retrypt_type) { + int perms; + error_t err; + struct trivfs_protid *newcred; + if (!cred) return EOPNOTSUPP; - return ENOTDIR; + if (filename[0]) + return ENOTDIR; + + /* This is a null-pathname "reopen" call; do the right thing. */ + + /* Burn off flags we don't actually implement */ + flags &= O_HURD; + flags &= ~(O_CREAT|O_EXCL|O_NOLINK|O_NOTRANS); + + /* Validate permissions */ + file_check_access (cred->realnode, &perms); + if ((flags & (O_READ|O_WRITE|O_EXEC) & perms) + != (flags & (O_READ|O_WRITE|O_EXEC))) + return EACCES; + + /* Execute the open */ + if (trivfs_check_open_hook) + err = (*trivfs_check_open_hook) (cred->po->cntl, user, flags); + if (!err) + err = trivfs_open (cred->po->cntl, cred->user, flags, + cred->realnode, &newcred); + if (err) + return err; + + *retry_type = FS_RETRY_NORMAL; + *retry_name = '\0'; + *retrypt = ports_get_right (newcred); + *retrypt_type = MACH_MSG_TYPE_MAKE_SEND; + ports_port_deref (newcred); + return 0; } |