diff options
Diffstat (limited to 'libtrivfs/dir-lookup.c')
| -rw-r--r-- | libtrivfs/dir-lookup.c | 58 |
1 files changed, 54 insertions, 4 deletions
diff --git a/libtrivfs/dir-lookup.c b/libtrivfs/dir-lookup.c index cdcfd4be..66afac1d 100644 --- a/libtrivfs/dir-lookup.c +++ b/libtrivfs/dir-lookup.c @@ -1,5 +1,5 @@ -/* - Copyright (C) 1994 Free Software Foundation +/* + Copyright (C) 1994,98,99,2001,02 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -16,7 +16,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "priv.h" -#include "fs_S.h" #include <assert.h> #include <fcntl.h> #include <string.h> @@ -32,8 +31,59 @@ 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 */ + if (! trivfs_check_access_hook) + file_check_access (cred->realnode, &perms); + else + (*trivfs_check_access_hook) (cred->po->cntl, cred->user, + cred->realnode, &perms); + if ((flags & (O_READ|O_WRITE|O_EXEC) & perms) + != (flags & (O_READ|O_WRITE|O_EXEC))) + return EACCES; + + /* Execute the open */ + err = 0; + if (trivfs_check_open_hook) + err = (*trivfs_check_open_hook) (cred->po->cntl, cred->user, flags); + if (!err) + { + struct iouser *user; + + err = iohelp_dup_iouser (&user, cred->user); + if (err) + return err; + + err = trivfs_open (cred->po->cntl, user, flags, + cred->realnode, &newcred); + if (err) + iohelp_free_iouser (user); + else + mach_port_mod_refs (mach_task_self (), cred->realnode, + MACH_PORT_RIGHT_SEND, +1); + } + 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; } |