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-rw-r--r--libtreefs/dir-lookup.c313
1 files changed, 0 insertions, 313 deletions
diff --git a/libtreefs/dir-lookup.c b/libtreefs/dir-lookup.c
deleted file mode 100644
index 33fefe69..00000000
--- a/libtreefs/dir-lookup.c
+++ /dev/null
@@ -1,313 +0,0 @@
-/* Default treefs_s_dir_lookup hook
-
- Copyright (C) 1992, 1993, 1994, 1995, 1998 Free Software Foundation, Inc.
-
- This file is part of the GNU Hurd.
-
- 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.
-
- 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <fcntl.h>
-#include <string.h>
-
-#include <hurd/fsys.h>
-
-#include "treefs.h"
-#include "treefs-s-hooks.h"
-
-/* Default dir_lookup hook. This code was originally copied from diskfs. */
-error_t
-_treefs_s_dir_lookup (struct treefs_handle *h,
- char *path, int flags, mode_t mode,
- enum retry_type *retry, char *retry_name,
- file_t *result, mach_msg_type_name_t *result_type)
-{
- struct treefs_node *dir;
- struct treefs_node *node;
- unsigned symlink_expansions = 0;
- error_t err = 0;
- char *path_buf = 0;
- int path_buf_len = 0;
- int lastcomp = 0;
- int mustbedir = 0;
-
- flags &= O_HURD;
- mode &= ~S_IFMT;
-
- /* Skip leading slashes */
- while (path[0] == '/')
- path++;
-
- *result_type = MACH_MSG_TYPE_MAKE_SEND;
- *retry = FS_RETRY_NORMAL;
- retry_name[0] = '\0';
-
- if (path[0] == '\0')
- {
- /* Set things up in the state expected by the code from gotit: on. */
- dir = 0;
- node = h->po->node;
- pthread_mutex_lock (&node->lock);
- treefs_node_ref (node);
- goto gotit;
- }
-
- dir = h->po->node;
- pthread_mutex_lock (&dir->lock);
- node = 0;
-
- treefs_node_ref (dir); /* acquire a ref for later node_release */
-
- do
- {
- char *nextname;
-
- assert_backtrace (!lastcomp);
-
- /* Find the name of the next pathname component */
- nextname = index (path, '/');
-
- if (nextname)
- {
- *nextname++ = '\0';
- while (*nextname == '/')
- nextname++;
- if (*nextname == '\0')
- {
- /* These are the rules for filenames ending in /. */
- nextname = 0;
- lastcomp = 1;
- mustbedir = 1;
-
- }
- else
- lastcomp = 0;
- }
- else
- lastcomp = 1;
-
- node = 0;
-
- /* Lookup the next pathname component. */
- if (!lastcomp)
- err = treefs_dir_lookup (dir, path, h->auth, 0, 0, &node);
- else
- /* ... and in this case, the last. Note that the S_IFREG only
- applies in the case of O_CREAT, which is turned off for
- directories anyway. */
- err =
- treefs_dir_lookup (dir, path, h->auth, flags, mode | S_IFREG, &node);
-
- /* If we get an error we're done */
- if (err == EAGAIN)
- {
- if (h->po->parent_port != MACH_PORT_NULL)
- {
- *retry = FS_RETRY_REAUTH;
- *result = h->po->parent_port;
- *result_type = MACH_MSG_TYPE_COPY_SEND;
- if (!lastcomp)
- strcpy (retry_name, nextname);
- err = 0;
- goto out;
- }
- else
- /* The global filesystem root... .. == . */
- {
- err = 0;
- node = dir;
- treefs_node_ref (node);
- }
- }
-
- if (err)
- goto out;
-
- /* If this is translated, start the translator (if necessary)
- and return. */
- /* The check for `node != dir' simplifies this code a great
- deal. Such a translator should already have been started,
- so there's no lossage in doing it this way. */
- if ((!lastcomp || !(flags & O_NOTRANS))
- && node != dir)
- {
- file_t dir_port = MACH_PORT_NULL, child_fsys;
-
- /* Be very careful not to hold an inode lock while fetching
- a translator lock and vice versa. */
-
- pthread_mutex_unlock (&node->lock);
- pthread_mutex_unlock (&dir->lock);
-
- do
- {
- err =
- treefs_node_get_active_trans (node, dir, h->po->parent_port,
- &dir_port, &child_fsys);
- if (err == 0 && child_fsys != MACH_PORT_NULL)
- {
- err =
- fsys_getroot (child_fsys, dir_port,
- MACH_MSG_TYPE_COPY_SEND,
- h->auth->uids, h->auth->nuids,
- h->auth->gids, h->auth->ngids,
- lastcomp ? flags : 0,
- retry, retry_name, result);
- /* If we got MACH_SEND_INVALID_DEST or MIG_SERVER_DIED, then
- the server is dead. Zero out the old control port and try
- everything again. */
- if (err == MACH_SEND_INVALID_DEST || err == EMIG_SERVER_DIED)
- treefs_node_drop_active_trans (node, child_fsys);
- }
- }
- while (err == MACH_SEND_INVALID_DEST || err == EMIG_SERVER_DIED);
-
- if (err || child_fsys)
- {
- /* We're done; return to the user. If there are more
- components after this name, be sure to append them to the
- user's retry path. */
- if (!err && !lastcomp)
- {
- strcat (retry_name, "/");
- strcat (retry_name, nextname);
- }
-
- *result_type = MACH_MSG_TYPE_MOVE_SEND;
-
- treefs_node_unref (dir);
- treefs_node_unref (node);
- if (dir_port)
- mach_port_deallocate (mach_task_self (), dir_port);
-
- return err;
- }
-
- /* We're here if we tried the translator check, and it
- failed. Lock everything back, and make sure we do it
- in the right order. */
- if (strcmp (path, "..") != 0)
- {
- if (pthread_mutex_trylock (&dir->lock))
- {
- pthread_mutex_unlock (&node->lock);
- pthread_mutex_lock (&dir->lock);
- pthread_mutex_lock (&node->lock);
- }
- }
- else
- pthread_mutex_lock (&dir->lock);
- }
-
- if (treefs_node_type (node) == S_IFLNK
- && !(lastcomp && (flags & (O_NOLINK|O_NOTRANS))))
- /* Handle symlink interpretation */
- {
- unsigned nextname_len = nextname ? strlen (nextname) + 1 : 0;
- /* max space we currently have for the sym link */
- unsigned sym_len = path_buf_len - nextname_len - 1;
-
- if (symlink_expansions++ > node->fsys->max_symlinks)
- {
- err = ELOOP;
- goto out;
- }
-
- err = treefs_node_get_symlink (node, path_buf, &sym_len);
- if (err == E2BIG)
- /* Symlink contents + extra path won't fit in our buffer, so
- reallocate it and try again. */
- {
- path_buf_len = sym_len + nextname_len + 1 + 1;
- path_buf = alloca (path_buf_len);
- err = treefs_node_get_symlink (node, path_buf, &sym_len);
- }
- if (err)
- goto out;
-
- if (nextname)
- {
- path_buf[sym_len] = '/';
- bcopy (nextname, path_buf + sym_len + 1, nextname_len - 1);
- }
- if (mustbedir)
- {
- path_buf[nextnamelen + sym_len] = '/';
- path_buf[nextnamelen + sym_len + 1] = '\0';
- }
- else
- path_buf[nextname_len + sym_len] = '\0';
-
- if (path_buf[0] == '/')
- {
- /* Punt to the caller. */
- *retry = FS_RETRY_MAGICAL;
- *result = MACH_PORT_NULL;
- strcpy (retry_name, path_buf);
- goto out;
- }
-
- path = path_buf;
- mustbedir = 0;
- if (lastcomp)
- {
- lastcomp = 0;
- /* Symlinks to nonexistent files aren't allowed to cause
- creation, so clear the flag here. */
- flags &= ~O_CREAT;
- }
- treefs_node_release (node);
- node = 0;
- }
- else
- {
- /* Handle normal nodes */
- path = nextname;
- if (node == dir)
- treefs_node_unref (dir);
- else
- treefs_node_release (dir);
- if (!lastcomp)
- {
- dir = node;
- node = 0;
- }
- else
- dir = 0;
- }
- } while (path && *path);
-
- gotit:
- /* At this point, node is the node to return. */
-
- if (mustbedir && !treefs_node_isdir (node))
- err = ENOTDIR;
- if (err)
- goto out;
-
- err = treefs_node_create_right (node, flags, h->po->parent_port, h->auth,
- result);
-
- out:
- if (node)
- {
- if (dir == node)
- treefs_node_unref (node);
- else
- treefs_node_release (node);
- }
- if (dir)
- treefs_node_release (dir);
- return err;
-}
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