diff options
| -rw-r--r-- | libdiskfs/fsys-getfile.c | 121 |
1 files changed, 93 insertions, 28 deletions
diff --git a/libdiskfs/fsys-getfile.c b/libdiskfs/fsys-getfile.c index 90352ead..67bd62e7 100644 --- a/libdiskfs/fsys-getfile.c +++ b/libdiskfs/fsys-getfile.c @@ -1,40 +1,105 @@ -/* - Copyright (C) 1994, 1995 Free Software Foundation +/* Return the file for a given handle (for nfs server support) -This file is part of the GNU Hurd. + Copyright (C) 1997 Free Software Foundation -The GNU Hurd is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. + This file is part of the GNU Hurd. -The GNU Hurd is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + The GNU Hurd is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. -You should have received a copy of the GNU General Public License -along with the GNU Hurd; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + The GNU Hurd is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -/* Written by Michael I. Bushnell. */ + You should have received a copy of the GNU General Public License + along with the GNU Hurd; see the file COPYING. If not, write to + the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <fcntl.h> #include "priv.h" #include "fsys_S.h" +#include "fhandle.h" +/* Return in FILE & FILE_TYPE the file in FSYS corresponding to the NFS file + handle HANDLE & HANDLE_LEN. */ error_t -diskfs_S_fsys_getfile (mach_port_t fsys __attribute__ ((unused)), - mach_port_t reply, - mach_msg_type_name_t replytype, - uid_t *gen_uids __attribute__ ((unused)), - u_int ngen_uids __attribute__ ((unused)), - uid_t *gen_gids __attribute__ ((unused)), - u_int ngen_gids __attribute__ ((unused)), - char *handle __attribute__ ((unused)), - u_int handlelen __attribute__ ((unused)), - mach_port_t *file __attribute__ ((unused)), - mach_msg_type_name_t *filetype __attribute__ ((unused))) +diskfs_S_fsys_getfile (mach_port_t fsys, + mach_port_t reply, mach_msg_type_name_t reply_type, + uid_t *uids, mach_msg_type_number_t nuids, + gid_t *gids, mach_msg_type_number_t ngids, + char *handle, mach_msg_type_number_t handle_len, + mach_port_t *file, mach_msg_type_name_t *file_type) { - return EOPNOTSUPP; -} + int flags; + error_t err; + struct node *node; + struct diskfs_fhandle *f; + struct protid *new_cred; + struct idvec *uvec, *gvec; + struct iouser *user; + struct port_info *pt = + ports_lookup_port (diskfs_port_bucket, fsys, diskfs_control_class); + + if (!pt) + return EOPNOTSUPP; + + if (handle_len != sizeof (struct diskfs_fhandle)) + { + ports_port_deref (pt); + return EINVAL; + } + + f = (struct diskfs_fhandle *) handle; + + err = diskfs_cached_lookup (f->cache_id, &node); + if (err) + { + ports_port_deref (pt); + return err; + } + if (node->dn_stat.st_gen != f->gen) + { + diskfs_nput (node); + ports_port_deref (pt); + return ESTALE; + } + + uvec = make_idvec (); + gvec = make_idvec (); + + idvec_set_ids (uvec, uids, nuids); + idvec_set_ids (gvec, gids, ngids); + user = iohelp_create_iouser (uvec, gvec); + + flags = 0; + if (! fshelp_access (&node->dn_stat, S_IREAD, user)) + flags |= O_READ; + if (! fshelp_access (&node->dn_stat, S_IEXEC, user)) + flags |= O_EXEC; + if (! fshelp_access (&node->dn_stat, S_IWRITE, user) + && ! S_ISDIR (node->dn_stat.st_mode) + && ! diskfs_check_readonly ()) + flags |= O_WRITE; + + err = diskfs_create_protid (diskfs_make_peropen (node, flags, + MACH_PORT_NULL, 0), + user, &new_cred); + + iohelp_free_iouser (user); + + diskfs_nput (node); + ports_port_deref (pt); + + if (! err) + { + *file = ports_get_right (new_cred); + *file_type = MACH_MSG_TYPE_MAKE_SEND; + } + + return err; +} |