Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2254 insertions, 0 deletions

diff --git a/modules/dav/fs/repos.c b/modules/dav/fs/repos.c
new file mode 100644
index 0000000..6a5ff76
--- /dev/null
+++ b/modules/dav/fs/repos.c
@@ -0,0 +1,2254 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+** DAV filesystem-based repository provider
+*/
+
+#include "apr.h"
+#include "apr_file_io.h"
+#include "apr_strings.h"
+#include "apr_buckets.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>             /* for getpid() */
+#endif
+
+#include "httpd.h"
+#include "http_log.h"
+#include "http_protocol.h"      /* for ap_set_* (in dav_fs_set_headers) */
+#include "http_request.h"       /* for ap_update_mtime() */
+
+#include "mod_dav.h"
+#include "repos.h"
+
+
+/* to assist in debugging mod_dav's GET handling */
+#define DEBUG_GET_HANDLER       0
+
+#define DAV_FS_COPY_BLOCKSIZE   16384   /* copy 16k at a time */
+
+/* context needed to identify a resource */
+struct dav_resource_private {
+    apr_pool_t *pool;        /* memory storage pool associated with request */
+    const char *pathname;   /* full pathname to resource */
+    apr_finfo_t finfo;       /* filesystem info */
+    request_rec *r;
+};
+
+/* private context for doing a filesystem walk */
+typedef struct {
+    /* the input walk parameters */
+    const dav_walk_params *params;
+
+    /* reused as we walk */
+    dav_walk_resource wres;
+
+    dav_resource res1;
+    dav_resource_private info1;
+    dav_buffer path1;
+    dav_buffer uri_buf;
+
+    /* MOVE/COPY need a secondary path */
+    dav_resource res2;
+    dav_resource_private info2;
+    dav_buffer path2;
+
+    dav_buffer locknull_buf;
+
+} dav_fs_walker_context;
+
+typedef struct {
+    int is_move;                /* is this a MOVE? */
+    dav_buffer work_buf;        /* handy buffer for copymove_file() */
+
+    /* CALLBACK: this is a secondary resource managed specially for us */
+    const dav_resource *res_dst;
+
+    /* copied from dav_walk_params (they are invariant across the walk) */
+    const dav_resource *root;
+    apr_pool_t *pool;
+
+} dav_fs_copymove_walk_ctx;
+
+/* an internal WALKTYPE to walk hidden files (the .DAV directory) */
+#define DAV_WALKTYPE_HIDDEN     0x4000
+
+/* an internal WALKTYPE to call collections (again) after their contents */
+#define DAV_WALKTYPE_POSTFIX    0x8000
+
+#define DAV_CALLTYPE_POSTFIX    1000    /* a private call type */
+
+
+/* pull this in from the other source file */
+extern const dav_hooks_locks dav_hooks_locks_fs;
+
+/* forward-declare the hook structures */
+static const dav_hooks_repository dav_hooks_repository_fs;
+static const dav_hooks_liveprop dav_hooks_liveprop_fs;
+
+/*
+** The namespace URIs that we use. This list and the enumeration must
+** stay in sync.
+*/
+static const char * const dav_fs_namespace_uris[] =
+{
+    "DAV:",
+    "http://apache.org/dav/props/",
+
+    NULL        /* sentinel */
+};
+enum {
+    DAV_FS_URI_DAV,            /* the DAV: namespace URI */
+    DAV_FS_URI_MYPROPS         /* the namespace URI for our custom props */
+};
+
+/*
+** Does this platform support an executable flag?
+**
+** ### need a way to portably abstract this query
+**
+** DAV_FINFO_MASK gives the appropriate mask to use for the stat call
+** used to get file attributes.
+*/
+#ifndef WIN32
+#define DAV_FS_HAS_EXECUTABLE
+#define DAV_FINFO_MASK (APR_FINFO_LINK | APR_FINFO_TYPE | APR_FINFO_INODE | \
+                        APR_FINFO_SIZE | APR_FINFO_CTIME | APR_FINFO_MTIME | \
+                        APR_FINFO_PROT)
+#else
+/* as above, but without APR_FINFO_PROT */
+#define DAV_FINFO_MASK (APR_FINFO_LINK | APR_FINFO_TYPE | APR_FINFO_INODE | \
+                        APR_FINFO_SIZE | APR_FINFO_CTIME | APR_FINFO_MTIME)
+#endif
+
+/*
+** The single property that we define (in the DAV_FS_URI_MYPROPS namespace)
+*/
+#define DAV_PROPID_FS_executable        1
+
+/*
+ * prefix for temporary files
+ */
+#define DAV_FS_TMP_PREFIX ".davfs.tmp"
+
+static const dav_liveprop_spec dav_fs_props[] =
+{
+    /* standard DAV properties */
+    {
+        DAV_FS_URI_DAV,
+        "creationdate",
+        DAV_PROPID_creationdate,
+        0
+    },
+    {
+        DAV_FS_URI_DAV,
+        "getcontentlength",
+        DAV_PROPID_getcontentlength,
+        0
+    },
+    {
+        DAV_FS_URI_DAV,
+        "getetag",
+        DAV_PROPID_getetag,
+        0
+    },
+    {
+        DAV_FS_URI_DAV,
+        "getlastmodified",
+        DAV_PROPID_getlastmodified,
+        0
+    },
+
+    /* our custom properties */
+    {
+        DAV_FS_URI_MYPROPS,
+        "executable",
+        DAV_PROPID_FS_executable,
+        0       /* handled special in dav_fs_is_writable */
+    },
+
+    { 0 }        /* sentinel */
+};
+
+static const dav_liveprop_group dav_fs_liveprop_group =
+{
+    dav_fs_props,
+    dav_fs_namespace_uris,
+    &dav_hooks_liveprop_fs
+};
+
+
+/* define the dav_stream structure for our use */
+struct dav_stream {
+    apr_pool_t *p;
+    apr_file_t *f;
+    const char *pathname;       /* we may need to remove it at close time */
+    char *temppath;
+    int unlink_on_error;
+};
+
+/* returns an appropriate HTTP status code given an APR status code for a
+ * failed I/O operation.  ### use something besides 500? */
+#define MAP_IO2HTTP(e) (APR_STATUS_IS_ENOSPC(e) ? HTTP_INSUFFICIENT_STORAGE : \
+                        APR_STATUS_IS_ENOENT(e) ? HTTP_CONFLICT : \
+                        HTTP_INTERNAL_SERVER_ERROR)
+
+/* forward declaration for internal treewalkers */
+static dav_error * dav_fs_walk(const dav_walk_params *params, int depth,
+                               dav_response **response);
+static dav_error * dav_fs_internal_walk(const dav_walk_params *params,
+                                        int depth, int is_move,
+                                        const dav_resource *root_dst,
+                                        dav_response **response);
+
+/* --------------------------------------------------------------------
+**
+** PRIVATE REPOSITORY FUNCTIONS
+*/
+static request_rec *dav_fs_get_request_rec(const dav_resource *resource)
+{
+    return resource->info->r;
+}
+
+apr_pool_t *dav_fs_pool(const dav_resource *resource)
+{
+    return resource->info->pool;
+}
+
+const char *dav_fs_pathname(const dav_resource *resource)
+{
+    return resource->info->pathname;
+}
+
+dav_error * dav_fs_dir_file_name(
+    const dav_resource *resource,
+    const char **dirpath_p,
+    const char **fname_p)
+{
+    dav_resource_private *ctx = resource->info;
+
+    if (resource->collection) {
+        *dirpath_p = ctx->pathname;
+        if (fname_p != NULL)
+            *fname_p = NULL;
+    }
+    else {
+        const char *testpath, *rootpath;
+        char *dirpath = ap_make_dirstr_parent(ctx->pool, ctx->pathname);
+        apr_size_t dirlen = strlen(dirpath);
+        apr_status_t rv = APR_SUCCESS;
+
+        testpath = dirpath;
+        if (dirlen > 0) {
+            rv = apr_filepath_root(&rootpath, &testpath, 0, ctx->pool);
+        }
+
+        /* remove trailing slash from dirpath, unless it's a root path
+         */
+        if ((rv == APR_SUCCESS && testpath && *testpath)
+            || rv == APR_ERELATIVE) {
+            if (dirpath[dirlen - 1] == '/') {
+                dirpath[dirlen - 1] = '\0';
+            }
+        }
+
+        /* ###: Looks like a response could be appropriate
+         *
+         * APR_SUCCESS     here tells us the dir is a root
+         * APR_ERELATIVE   told us we had no root (ok)
+         * APR_EINCOMPLETE an incomplete testpath told us
+         *                 there was no -file- name here!
+         * APR_EBADPATH    or other errors tell us this file
+         *                 path is undecipherable
+         */
+
+        if (rv == APR_SUCCESS || rv == APR_ERELATIVE) {
+            *dirpath_p = dirpath;
+            if (fname_p != NULL)
+                *fname_p = ctx->pathname + dirlen;
+        }
+        else {
+            return dav_new_error(ctx->pool, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                                 "An incomplete/bad path was found in "
+                                 "dav_fs_dir_file_name.");
+        }
+    }
+
+    return NULL;
+}
+
+/* Note: picked up from ap_gm_timestr_822() */
+/* NOTE: buf must be at least DAV_TIMEBUF_SIZE chars in size */
+static void dav_format_time(int style, apr_time_t sec, char *buf, apr_size_t buflen)
+{
+    apr_time_exp_t tms;
+
+    /* ### what to do if fails? */
+    (void) apr_time_exp_gmt(&tms, sec);
+
+    if (style == DAV_STYLE_ISO8601) {
+        /* ### should we use "-00:00" instead of "Z" ?? */
+
+        /* 20 chars plus null term */
+        apr_snprintf(buf, buflen, "%.4d-%.2d-%.2dT%.2d:%.2d:%.2dZ",
+                     tms.tm_year + 1900, tms.tm_mon + 1, tms.tm_mday,
+                     tms.tm_hour, tms.tm_min, tms.tm_sec);
+        return;
+    }
+
+    /* RFC 822 date format; as strftime '%a, %d %b %Y %T GMT' */
+
+    /* 29 chars plus null term */
+    apr_snprintf(buf, buflen, "%s, %.2d %s %d %.2d:%.2d:%.2d GMT",
+                 apr_day_snames[tms.tm_wday],
+                 tms.tm_mday, apr_month_snames[tms.tm_mon],
+                 tms.tm_year + 1900,
+                 tms.tm_hour, tms.tm_min, tms.tm_sec);
+}
+
+/* Copy or move src to dst; src_finfo is used to propagate permissions
+ * bits across if non-NULL; dst_finfo must be non-NULL iff dst already
+ * exists. */
+static dav_error * dav_fs_copymove_file(
+    int is_move,
+    apr_pool_t * p,
+    const char *src,
+    const char *dst,
+    const apr_finfo_t *src_finfo,
+    const apr_finfo_t *dst_finfo,
+    dav_buffer *pbuf)
+{
+    dav_buffer work_buf = { 0 };
+    apr_file_t *inf = NULL;
+    apr_file_t *outf = NULL;
+    apr_status_t status;
+    apr_fileperms_t perms;
+
+    if (pbuf == NULL)
+        pbuf = &work_buf;
+
+    /* Determine permissions to use for destination */
+    if (src_finfo && src_finfo->valid & APR_FINFO_PROT
+        && src_finfo->protection & APR_UEXECUTE) {
+        perms = src_finfo->protection;
+
+        if (dst_finfo != NULL) {
+            /* chmod it if it already exist */
+            if ((status = apr_file_perms_set(dst, perms)) != APR_SUCCESS) {
+                return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                                     "Could not set permissions on destination");
+            }
+        }
+    }
+    else {
+        perms = APR_OS_DEFAULT;
+    }
+
+    dav_set_bufsize(p, pbuf, DAV_FS_COPY_BLOCKSIZE);
+
+    if ((status = apr_file_open(&inf, src, APR_READ | APR_BINARY,
+                                APR_OS_DEFAULT, p)) != APR_SUCCESS) {
+        /* ### use something besides 500? */
+        return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "Could not open file for reading");
+    }
+
+    /* ### do we need to deal with the umask? */
+    status = apr_file_open(&outf, dst, APR_WRITE | APR_CREATE | APR_TRUNCATE
+                           | APR_BINARY, perms, p);
+    if (status != APR_SUCCESS) {
+        apr_file_close(inf);
+
+        return dav_new_error(p, MAP_IO2HTTP(status), 0, status,
+                             "Could not open file for writing");
+    }
+
+    while (1) {
+        apr_size_t len = DAV_FS_COPY_BLOCKSIZE;
+
+        status = apr_file_read(inf, pbuf->buf, &len);
+        if (status != APR_SUCCESS && status != APR_EOF) {
+            apr_status_t lcl_status;
+
+            apr_file_close(inf);
+            apr_file_close(outf);
+
+            if ((lcl_status = apr_file_remove(dst, p)) != APR_SUCCESS) {
+                /* ### ACK! Inconsistent state... */
+
+                /* ### use something besides 500? */
+                return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
+                                     lcl_status,
+                                     "Could not delete output after read "
+                                     "failure. Server is now in an "
+                                     "inconsistent state.");
+            }
+
+            /* ### use something besides 500? */
+            return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                                 "Could not read input file");
+        }
+
+        if (status == APR_EOF)
+            break;
+
+        /* write any bytes that were read */
+        status = apr_file_write_full(outf, pbuf->buf, len, NULL);
+        if (status != APR_SUCCESS) {
+            apr_status_t lcl_status;
+
+            apr_file_close(inf);
+            apr_file_close(outf);
+
+            if ((lcl_status = apr_file_remove(dst, p)) != APR_SUCCESS) {
+                /* ### ACK! Inconsistent state... */
+
+                /* ### use something besides 500? */
+                return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
+                                     lcl_status,
+                                     "Could not delete output after write "
+                                     "failure. Server is now in an "
+                                     "inconsistent state.");
+            }
+
+            return dav_new_error(p, MAP_IO2HTTP(status), 0, status,
+                                 "Could not write output file");
+        }
+    }
+
+    apr_file_close(inf);
+    apr_file_close(outf);
+
+    if (is_move && (status = apr_file_remove(src, p)) != APR_SUCCESS) {
+        dav_error *err;
+        apr_status_t lcl_status;
+
+        if (APR_STATUS_IS_ENOENT(status)) {
+            /*
+             * Something is wrong here but the result is what we wanted.
+             * We definitely should not remove the destination file.
+             */
+            err = dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                                 apr_psprintf(p, "Could not remove source "
+                                              "file %s after move to %s. The "
+                                              "server may be in an "
+                                              "inconsistent state.", src, dst));
+            return err;
+        }
+        else if ((lcl_status = apr_file_remove(dst, p)) != APR_SUCCESS) {
+            /* ### ACK. this creates an inconsistency. do more!? */
+
+            /* ### use something besides 500? */
+            return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, lcl_status,
+                                 "Could not remove source or destination "
+                                 "file. Server is now in an inconsistent "
+                                 "state.");
+        }
+
+        /* ### use something besides 500? */
+        err = dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                            "Could not remove source file after move. "
+                            "Destination was removed to ensure consistency.");
+        return err;
+    }
+
+    return NULL;
+}
+
+/* copy/move a file from within a state dir to another state dir */
+/* ### need more buffers to replace the pool argument */
+static dav_error * dav_fs_copymove_state(
+    int is_move,
+    apr_pool_t * p,
+    const char *src_dir, const char *src_file,
+    const char *dst_dir, const char *dst_file,
+    dav_buffer *pbuf)
+{
+    apr_finfo_t src_finfo;        /* finfo for source file */
+    apr_finfo_t dst_state_finfo;        /* finfo for STATE directory */
+    apr_status_t rv;
+    const char *src;
+    const char *dst;
+
+    /* build the propset pathname for the source file */
+    src = apr_pstrcat(p, src_dir, "/" DAV_FS_STATE_DIR "/", src_file, NULL);
+
+    /* the source file doesn't exist */
+    rv = apr_stat(&src_finfo, src, APR_FINFO_NORM, p);
+    if (rv != APR_SUCCESS && rv != APR_INCOMPLETE) {
+        return NULL;
+    }
+
+    /* build the pathname for the destination state dir */
+    dst = apr_pstrcat(p, dst_dir, "/" DAV_FS_STATE_DIR, NULL);
+
+    /* ### do we need to deal with the umask? */
+
+    /* ensure that it exists */
+    rv = apr_dir_make(dst, APR_OS_DEFAULT, p);
+    if (rv != APR_SUCCESS) {
+        if (!APR_STATUS_IS_EEXIST(rv)) {
+            /* ### use something besides 500? */
+            return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                                 "Could not create internal state directory");
+        }
+    }
+
+    /* get info about the state directory */
+    rv = apr_stat(&dst_state_finfo, dst, APR_FINFO_NORM, p);
+    if (rv != APR_SUCCESS && rv != APR_INCOMPLETE) {
+        /* Ack! Where'd it go? */
+        /* ### use something besides 500? */
+        return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                             "State directory disappeared");
+    }
+
+    /* The mkdir() may have failed because a *file* exists there already */
+    if (dst_state_finfo.filetype != APR_DIR) {
+        /* ### try to recover by deleting this file? (and mkdir again) */
+        /* ### use something besides 500? */
+        return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, 0,
+                             "State directory is actually a file");
+    }
+
+    /* append the target file to the state directory pathname */
+    dst = apr_pstrcat(p, dst, "/", dst_file, NULL);
+
+    /* copy/move the file now */
+    if (is_move) {
+        /* try simple rename first */
+        rv = apr_file_rename(src, dst, p);
+        if (APR_STATUS_IS_EXDEV(rv)) {
+            return dav_fs_copymove_file(is_move, p, src, dst, NULL, NULL, pbuf);
+        }
+        if (rv != APR_SUCCESS) {
+            /* ### use something besides 500? */
+            return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                                 "Could not move state file.");
+        }
+    }
+    else
+    {
+        /* gotta copy (and delete) */
+        return dav_fs_copymove_file(is_move, p, src, dst, NULL, NULL, pbuf);
+    }
+
+    return NULL;
+}
+
+static dav_error *dav_fs_copymoveset(int is_move, apr_pool_t *p,
+                                     const dav_resource *src,
+                                     const dav_resource *dst,
+                                     dav_buffer *pbuf)
+{
+    const char *src_dir;
+    const char *src_file;
+    const char *src_state1;
+    const char *src_state2;
+    const char *dst_dir;
+    const char *dst_file;
+    const char *dst_state1;
+    const char *dst_state2;
+    dav_error *err;
+
+    /* Get directory and filename for resources */
+    /* ### should test these result values... */
+    (void) dav_fs_dir_file_name(src, &src_dir, &src_file);
+    (void) dav_fs_dir_file_name(dst, &dst_dir, &dst_file);
+
+    /* Get the corresponding state files for each resource */
+    dav_dbm_get_statefiles(p, src_file, &src_state1, &src_state2);
+    dav_dbm_get_statefiles(p, dst_file, &dst_state1, &dst_state2);
+#if DAV_DEBUG
+    if ((src_state2 != NULL && dst_state2 == NULL) ||
+        (src_state2 == NULL && dst_state2 != NULL)) {
+        return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, 0,
+                             "DESIGN ERROR: dav_dbm_get_statefiles() "
+                             "returned inconsistent results.");
+    }
+#endif
+
+    err = dav_fs_copymove_state(is_move, p,
+                                src_dir, src_state1,
+                                dst_dir, dst_state1,
+                                pbuf);
+
+    if (err == NULL && src_state2 != NULL) {
+        err = dav_fs_copymove_state(is_move, p,
+                                    src_dir, src_state2,
+                                    dst_dir, dst_state2,
+                                    pbuf);
+
+        if (err != NULL) {
+            /* ### CRAP. inconsistency. */
+            /* ### should perform some cleanup at the target if we still
+               ### have the original files */
+
+            /* Change the error to reflect the bad server state. */
+            err->status = HTTP_INTERNAL_SERVER_ERROR;
+            err->desc =
+                "Could not fully copy/move the properties. "
+                "The server is now in an inconsistent state.";
+        }
+    }
+
+    return err;
+}
+
+static dav_error *dav_fs_deleteset(apr_pool_t *p, const dav_resource *resource)
+{
+    const char *dirpath;
+    const char *fname;
+    const char *state1;
+    const char *state2;
+    const char *pathname;
+    apr_status_t status;
+
+    /* Get directory, filename, and state-file names for the resource */
+    /* ### should test this result value... */
+    (void) dav_fs_dir_file_name(resource, &dirpath, &fname);
+    dav_dbm_get_statefiles(p, fname, &state1, &state2);
+
+    /* build the propset pathname for the file */
+    pathname = apr_pstrcat(p,
+                          dirpath,
+                          "/" DAV_FS_STATE_DIR "/",
+                          state1,
+                          NULL);
+
+    /* note: we may get ENOENT if the state dir is not present */
+    if ((status = apr_file_remove(pathname, p)) != APR_SUCCESS
+        && !APR_STATUS_IS_ENOENT(status)) {
+        return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "Could not remove properties.");
+    }
+
+    if (state2 != NULL) {
+        /* build the propset pathname for the file */
+        pathname = apr_pstrcat(p,
+                              dirpath,
+                              "/" DAV_FS_STATE_DIR "/",
+                              state2,
+                              NULL);
+
+        if ((status = apr_file_remove(pathname, p)) != APR_SUCCESS
+            && !APR_STATUS_IS_ENOENT(status)) {
+            /* ### CRAP. only removed half. */
+            return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                                 "Could not fully remove properties. "
+                                 "The server is now in an inconsistent "
+                                 "state.");
+        }
+    }
+
+    return NULL;
+}
+
+/* --------------------------------------------------------------------
+**
+** REPOSITORY HOOK FUNCTIONS
+*/
+
+static dav_error * dav_fs_get_resource(
+    request_rec *r,
+    const char *root_dir,
+    const char *label,
+    int use_checked_in,
+    dav_resource **result_resource)
+{
+    dav_resource_private *ctx;
+    dav_resource *resource;
+    char *s;
+    char *filename;
+    apr_size_t len;
+
+    /* ### optimize this into a single allocation! */
+
+    /* Create private resource context descriptor */
+    ctx = apr_pcalloc(r->pool, sizeof(*ctx));
+    ctx->finfo = r->finfo;
+    ctx->r = r;
+
+    /* ### this should go away */
+    ctx->pool = r->pool;
+
+    /* Preserve case on OSes which fold canonical filenames */
+#if 0
+    /* ### not available in Apache 2.0 yet */
+    filename = r->case_preserved_filename;
+#else
+    filename = r->filename;
+#endif
+
+    /*
+    ** If there is anything in the path_info, then this indicates that the
+    ** entire path was not used to specify the file/dir. We want to append
+    ** it onto the filename so that we get a "valid" pathname for null
+    ** resources.
+    */
+    s = apr_pstrcat(r->pool, filename, r->path_info, NULL);
+
+    /* make sure the pathname does not have a trailing "/" */
+    len = strlen(s);
+    if (len > 1 && s[len - 1] == '/') {
+        s[len - 1] = '\0';
+    }
+    ctx->pathname = s;
+
+    /* Create resource descriptor */
+    resource = apr_pcalloc(r->pool, sizeof(*resource));
+    resource->type = DAV_RESOURCE_TYPE_REGULAR;
+    resource->info = ctx;
+    resource->hooks = &dav_hooks_repository_fs;
+    resource->pool = r->pool;
+
+    /* make sure the URI does not have a trailing "/" */
+    len = strlen(r->uri);
+    if (len > 1 && r->uri[len - 1] == '/') {
+        s = apr_pstrmemdup(r->pool, r->uri, len-1);
+        resource->uri = s;
+    }
+    else {
+        resource->uri = r->uri;
+    }
+
+    if (r->finfo.filetype != APR_NOFILE) {
+        resource->exists = 1;
+        resource->collection = r->finfo.filetype == APR_DIR;
+
+        /* unused info in the URL will indicate a null resource */
+
+        if (r->path_info != NULL && *r->path_info != '\0') {
+            if (resource->collection) {
+                /* only a trailing "/" is allowed */
+                if (*r->path_info != '/' || r->path_info[1] != '\0') {
+
+                    /*
+                    ** This URL/filename represents a locknull resource or
+                    ** possibly a destination of a MOVE/COPY
+                    */
+                    resource->exists = 0;
+                    resource->collection = 0;
+                }
+            }
+            else
+            {
+                /*
+                ** The base of the path refers to a file -- nothing should
+                ** be in path_info. The resource is simply an error: it
+                ** can't be a null or a locknull resource.
+                */
+                return dav_new_error(r->pool, HTTP_BAD_REQUEST, 0, 0,
+                                     "The URL contains extraneous path "
+                                     "components. The resource could not "
+                                     "be identified.");
+            }
+
+            /* retain proper integrity across the structures */
+            if (!resource->exists) {
+                ctx->finfo.filetype = APR_NOFILE;
+            }
+        }
+    }
+
+    *result_resource = resource;
+    return NULL;
+}
+
+static dav_error * dav_fs_get_parent_resource(const dav_resource *resource,
+                                              dav_resource **result_parent)
+{
+    dav_resource_private *ctx = resource->info;
+    dav_resource_private *parent_ctx;
+    dav_resource *parent_resource;
+    apr_status_t rv;
+    char *dirpath;
+    const char *testroot;
+    const char *testpath;
+
+    /* If we're at the root of the URL space, then there is no parent. */
+    if (strcmp(resource->uri, "/") == 0) {
+        *result_parent = NULL;
+        return NULL;
+    }
+
+    /* If given resource is root, then there is no parent.
+     * Unless we can retrieve the filepath root, this is
+     * intendend to fail.  If we split the root and
+     * no path info remains, then we also fail.
+     */
+    testpath = ctx->pathname;
+    rv = apr_filepath_root(&testroot, &testpath, 0, ctx->pool);
+    if ((rv != APR_SUCCESS && rv != APR_ERELATIVE)
+        || !testpath || !*testpath) {
+        *result_parent = NULL;
+        return NULL;
+    }
+
+    /* ### optimize this into a single allocation! */
+
+    /* Create private resource context descriptor */
+    parent_ctx = apr_pcalloc(ctx->pool, sizeof(*parent_ctx));
+
+    /* ### this should go away */
+    parent_ctx->pool = ctx->pool;
+
+    dirpath = ap_make_dirstr_parent(ctx->pool, ctx->pathname);
+    if (strlen(dirpath) > 1 && dirpath[strlen(dirpath) - 1] == '/')
+        dirpath[strlen(dirpath) - 1] = '\0';
+    parent_ctx->pathname = dirpath;
+
+    parent_resource = apr_pcalloc(ctx->pool, sizeof(*parent_resource));
+    parent_resource->info = parent_ctx;
+    parent_resource->collection = 1;
+    parent_resource->hooks = &dav_hooks_repository_fs;
+    parent_resource->pool = resource->pool;
+
+    if (resource->uri != NULL) {
+        char *uri = ap_make_dirstr_parent(ctx->pool, resource->uri);
+        if (strlen(uri) > 1 && uri[strlen(uri) - 1] == '/')
+            uri[strlen(uri) - 1] = '\0';
+        parent_resource->uri = uri;
+    }
+
+    rv = apr_stat(&parent_ctx->finfo, parent_ctx->pathname,
+                  APR_FINFO_NORM, ctx->pool);
+    if (rv == APR_SUCCESS || rv == APR_INCOMPLETE) {
+        parent_resource->exists = 1;
+    }
+
+    *result_parent = parent_resource;
+    return NULL;
+}
+
+static int dav_fs_is_same_resource(
+    const dav_resource *res1,
+    const dav_resource *res2)
+{
+    dav_resource_private *ctx1 = res1->info;
+    dav_resource_private *ctx2 = res2->info;
+
+    if (res1->hooks != res2->hooks)
+        return 0;
+
+    if ((ctx1->finfo.filetype != APR_NOFILE) && (ctx2->finfo.filetype != APR_NOFILE)
+        && (ctx1->finfo.valid & ctx2->finfo.valid & APR_FINFO_INODE)) {
+        return ctx1->finfo.inode == ctx2->finfo.inode;
+    }
+    else {
+        return strcmp(ctx1->pathname, ctx2->pathname) == 0;
+    }
+}
+
+static int dav_fs_is_parent_resource(
+    const dav_resource *res1,
+    const dav_resource *res2)
+{
+    dav_resource_private *ctx1 = res1->info;
+    dav_resource_private *ctx2 = res2->info;
+    apr_size_t len1 = strlen(ctx1->pathname);
+    apr_size_t len2;
+
+    if (res1->hooks != res2->hooks)
+        return 0;
+
+    /* it is safe to use ctx2 now */
+    len2 = strlen(ctx2->pathname);
+
+    return (len2 > len1
+            && memcmp(ctx1->pathname, ctx2->pathname, len1) == 0
+            && ctx2->pathname[len1] == '/');
+}
+
+static apr_status_t tmpfile_cleanup(void *data)
+{
+    dav_stream *ds = data;
+    if (ds->temppath) {
+        apr_file_remove(ds->temppath, ds->p);
+    }
+    return APR_SUCCESS;
+}
+
+/* custom mktemp that creates the file with APR_OS_DEFAULT permissions */
+static apr_status_t dav_fs_mktemp(apr_file_t **fp, char *templ, apr_pool_t *p)
+{
+    apr_status_t rv;
+    int num = ((getpid() << 7) + (apr_uintptr_t)templ % (1 << 16) ) %
+               ( 1 << 23 ) ;
+    char *numstr = templ + strlen(templ) - 6;
+
+    ap_assert(numstr >= templ);
+
+    do {
+        num = (num + 1) % ( 1 << 23 );
+        apr_snprintf(numstr, 7, "%06x", num);
+        rv = apr_file_open(fp, templ,
+                           APR_WRITE | APR_CREATE | APR_BINARY | APR_EXCL,
+                           APR_OS_DEFAULT, p);
+    } while (APR_STATUS_IS_EEXIST(rv));
+
+    return rv;
+}
+
+static dav_error * dav_fs_open_stream(const dav_resource *resource,
+                                      dav_stream_mode mode,
+                                      dav_stream **stream)
+{
+    apr_pool_t *p = resource->info->pool;
+    dav_stream *ds = apr_pcalloc(p, sizeof(*ds));
+    apr_int32_t flags;
+    apr_status_t rv;
+
+    switch (mode) {
+    default:
+        flags = APR_READ | APR_BINARY;
+        break;
+
+    case DAV_MODE_WRITE_TRUNC:
+        flags = APR_WRITE | APR_CREATE | APR_TRUNCATE | APR_BINARY;
+        break;
+    case DAV_MODE_WRITE_SEEKABLE:
+        flags = APR_WRITE | APR_CREATE | APR_BINARY;
+        break;
+    }
+
+    ds->p = p;
+    ds->pathname = resource->info->pathname;
+    ds->temppath = NULL;
+    ds->unlink_on_error = 0;
+
+    if (mode == DAV_MODE_WRITE_TRUNC) {
+        ds->temppath = apr_pstrcat(p, ap_make_dirstr_parent(p, ds->pathname),
+                                   DAV_FS_TMP_PREFIX "XXXXXX", NULL);
+        rv = dav_fs_mktemp(&ds->f, ds->temppath, ds->p);
+        apr_pool_cleanup_register(p, ds, tmpfile_cleanup,
+                                  apr_pool_cleanup_null);
+    }
+    else if (mode == DAV_MODE_WRITE_SEEKABLE) {
+        rv = apr_file_open(&ds->f, ds->pathname, flags | APR_FOPEN_EXCL,
+                           APR_OS_DEFAULT, ds->p);
+        if (rv == APR_SUCCESS) {
+            /* we have created a new file */
+            ds->unlink_on_error = 1;
+        }
+        else if (APR_STATUS_IS_EEXIST(rv)) {
+            rv = apr_file_open(&ds->f, ds->pathname, flags, APR_OS_DEFAULT,
+                               ds->p);
+        }
+    }
+    else {
+        rv = apr_file_open(&ds->f, ds->pathname, flags, APR_OS_DEFAULT, ds->p);
+    }
+
+    if (rv != APR_SUCCESS) {
+        return dav_new_error(p, MAP_IO2HTTP(rv), 0, rv,
+                             "An error occurred while opening a resource.");
+    }
+
+    /* (APR registers cleanups for the fd with the pool) */
+
+    *stream = ds;
+    return NULL;
+}
+
+static dav_error * dav_fs_close_stream(dav_stream *stream, int commit)
+{
+    apr_status_t rv;
+
+    apr_file_close(stream->f);
+
+    if (!commit) {
+        if (stream->temppath) {
+            apr_pool_cleanup_run(stream->p, stream, tmpfile_cleanup);
+        }
+        else if (stream->unlink_on_error) {
+            if ((rv = apr_file_remove(stream->pathname, stream->p))
+                != APR_SUCCESS) {
+                /* ### use a better description? */
+                return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0,
+                                     rv,
+                                     "There was a problem removing (rolling "
+                                     "back) the resource "
+                                     "when it was being closed.");
+            }
+        }
+    }
+    else if (stream->temppath) {
+        rv = apr_file_rename(stream->temppath, stream->pathname, stream->p);
+        if (rv) {
+            return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                                 "There was a problem writing the file "
+                                 "atomically after writes.");
+        }
+        apr_pool_cleanup_kill(stream->p, stream, tmpfile_cleanup);
+    }
+
+    return NULL;
+}
+
+static dav_error * dav_fs_write_stream(dav_stream *stream,
+                                       const void *buf, apr_size_t bufsize)
+{
+    apr_status_t status;
+
+    status = apr_file_write_full(stream->f, buf, bufsize, NULL);
+    if (APR_STATUS_IS_ENOSPC(status)) {
+        return dav_new_error(stream->p, HTTP_INSUFFICIENT_STORAGE, 0, status,
+                             "There is not enough storage to write to "
+                             "this resource.");
+    }
+    else if (status != APR_SUCCESS) {
+        /* ### use something besides 500? */
+        return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "An error occurred while writing to a "
+                             "resource.");
+    }
+    return NULL;
+}
+
+static dav_error * dav_fs_seek_stream(dav_stream *stream, apr_off_t abs_pos)
+{
+    apr_status_t status;
+
+    if ((status = apr_file_seek(stream->f, APR_SET, &abs_pos))
+        != APR_SUCCESS) {
+        /* ### should check whether apr_file_seek set abs_pos was set to the
+         * correct position? */
+        /* ### use something besides 500? */
+        return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "Could not seek to specified position in the "
+                             "resource.");
+    }
+    return NULL;
+}
+
+
+#if DEBUG_GET_HANDLER
+
+/* only define set_headers() and deliver() for debug purposes */
+
+
+static dav_error * dav_fs_set_headers(request_rec *r,
+                                      const dav_resource *resource)
+{
+    /* ### this function isn't really used since we have a get_pathname */
+    if (!resource->exists)
+        return NULL;
+
+    /* make sure the proper mtime is in the request record */
+    ap_update_mtime(r, resource->info->finfo.mtime);
+
+    /* ### note that these use r->filename rather than <resource> */
+    ap_set_last_modified(r);
+    ap_set_etag(r);
+
+    /* we accept byte-ranges */
+    ap_set_accept_ranges(r);
+
+    /* set up the Content-Length header */
+    ap_set_content_length(r, resource->info->finfo.size);
+
+    /* ### how to set the content type? */
+    /* ### until this is resolved, the Content-Type header is busted */
+
+    return NULL;
+}
+
+static dav_error * dav_fs_deliver(const dav_resource *resource,
+                                  ap_filter_t *output)
+{
+    apr_pool_t *pool = resource->pool;
+    apr_bucket_brigade *bb;
+    apr_file_t *fd;
+    apr_status_t status;
+    apr_bucket *bkt;
+
+    /* Check resource type */
+    if (resource->type != DAV_RESOURCE_TYPE_REGULAR
+        && resource->type != DAV_RESOURCE_TYPE_VERSION
+        && resource->type != DAV_RESOURCE_TYPE_WORKING) {
+        return dav_new_error(pool, HTTP_CONFLICT, 0, 0,
+                             "Cannot GET this type of resource.");
+    }
+    if (resource->collection) {
+        return dav_new_error(pool, HTTP_CONFLICT, 0, 0,
+                             "There is no default response to GET for a "
+                             "collection.");
+    }
+
+    if ((status = apr_file_open(&fd, resource->info->pathname,
+                                APR_READ | APR_BINARY, 0,
+                                pool)) != APR_SUCCESS) {
+        return dav_new_error(pool, HTTP_FORBIDDEN, 0, status,
+                             "File permissions deny server access.");
+    }
+
+    bb = apr_brigade_create(pool, output->c->bucket_alloc);
+
+    apr_brigade_insert_file(bb, fd, 0, resource->info->finfo.size, pool);
+
+    bkt = apr_bucket_eos_create(output->c->bucket_alloc);
+    APR_BRIGADE_INSERT_TAIL(bb, bkt);
+
+    if ((status = ap_pass_brigade(output, bb)) != APR_SUCCESS) {
+        return dav_new_error(pool, AP_FILTER_ERROR, 0, status,
+                             "Could not write contents to filter.");
+    }
+
+    return NULL;
+}
+
+#endif /* DEBUG_GET_HANDLER */
+
+
+static dav_error * dav_fs_create_collection(dav_resource *resource)
+{
+    dav_resource_private *ctx = resource->info;
+    apr_status_t status;
+
+    status = apr_dir_make(ctx->pathname, APR_OS_DEFAULT, ctx->pool);
+    if (APR_STATUS_IS_ENOSPC(status)) {
+        return dav_new_error(ctx->pool, HTTP_INSUFFICIENT_STORAGE, 0, status,
+                             "There is not enough storage to create "
+                             "this collection.");
+    }
+    else if (APR_STATUS_IS_ENOENT(status)) {
+        return dav_new_error(ctx->pool, HTTP_CONFLICT, 0, status,
+                             "Cannot create collection; intermediate "
+                             "collection does not exist.");
+    }
+    else if (status != APR_SUCCESS) {
+        /* ### refine this error message? */
+        return dav_new_error(ctx->pool, HTTP_FORBIDDEN, 0, status,
+                             "Unable to create collection.");
+    }
+
+    /* update resource state to show it exists as a collection */
+    resource->exists = 1;
+    resource->collection = 1;
+
+    return NULL;
+}
+
+static dav_error * dav_fs_copymove_walker(dav_walk_resource *wres,
+                                          int calltype)
+{
+    apr_status_t status;
+    dav_fs_copymove_walk_ctx *ctx = wres->walk_ctx;
+    dav_resource_private *srcinfo = wres->resource->info;
+    dav_resource_private *dstinfo = ctx->res_dst->info;
+    dav_error *err = NULL;
+
+    if (wres->resource->collection) {
+        if (calltype == DAV_CALLTYPE_POSTFIX) {
+            /* Postfix call for MOVE. delete the source dir.
+             * Note: when copying, we do not enable the postfix-traversal.
+             */
+            /* ### we are ignoring any error here; what should we do? */
+            (void) apr_dir_remove(srcinfo->pathname, ctx->pool);
+        }
+        else {
+            /* copy/move of a collection. Create the new, target collection */
+            if ((status = apr_dir_make(dstinfo->pathname, APR_OS_DEFAULT,
+                                       ctx->pool)) != APR_SUCCESS) {
+                /* ### assume it was a permissions problem */
+                /* ### need a description here */
+                err = dav_new_error(ctx->pool, HTTP_FORBIDDEN, 0, status, NULL);
+            }
+        }
+    }
+    else {
+        err = dav_fs_copymove_file(ctx->is_move, ctx->pool,
+                                   srcinfo->pathname, dstinfo->pathname,
+                                   &srcinfo->finfo,
+                                   ctx->res_dst->exists ? &dstinfo->finfo : NULL,
+                                   &ctx->work_buf);
+        /* ### push a higher-level description? */
+    }
+
+    /*
+    ** If we have a "not so bad" error, then it might need to go into a
+    ** multistatus response.
+    **
+    ** For a MOVE, it will always go into the multistatus. It could be
+    ** that everything has been moved *except* for the root. Using a
+    ** multistatus (with no errors for the other resources) will signify
+    ** this condition.
+    **
+    ** For a COPY, we are traversing in a prefix fashion. If the root fails,
+    ** then we can just bail out now.
+    */
+    if (err != NULL
+        && !ap_is_HTTP_SERVER_ERROR(err->status)
+        && (ctx->is_move
+            || !dav_fs_is_same_resource(wres->resource, ctx->root))) {
+        /* ### use errno to generate DAV:responsedescription? */
+        dav_add_response(wres, err->status, NULL);
+
+        /* the error is in the multistatus now. do not stop the traversal. */
+        return NULL;
+    }
+
+    return err;
+}
+
+static dav_error *dav_fs_copymove_resource(
+    int is_move,
+    const dav_resource *src,
+    const dav_resource *dst,
+    int depth,
+    dav_response **response)
+{
+    dav_error *err = NULL;
+    dav_buffer work_buf = { 0 };
+
+    *response = NULL;
+
+    /* if a collection, recursively copy/move it and its children,
+     * including the state dirs
+     */
+    if (src->collection) {
+        dav_walk_params params = { 0 };
+        dav_response *multi_status;
+
+        params.walk_type = DAV_WALKTYPE_NORMAL | DAV_WALKTYPE_HIDDEN;
+        params.func = dav_fs_copymove_walker;
+        params.pool = src->info->pool;
+        params.root = src;
+
+        /* params.walk_ctx is managed by dav_fs_internal_walk() */
+
+        /* postfix is needed for MOVE to delete source dirs */
+        if (is_move)
+            params.walk_type |= DAV_WALKTYPE_POSTFIX;
+
+        /* note that we return the error OR the multistatus. never both */
+
+        if ((err = dav_fs_internal_walk(&params, depth, is_move, dst,
+                                        &multi_status)) != NULL) {
+            /* on a "real" error, then just punt. nothing else to do. */
+            return err;
+        }
+
+        if ((*response = multi_status) != NULL) {
+            /* some multistatus responses exist. wrap them in a 207 */
+            return dav_new_error(src->info->pool, HTTP_MULTI_STATUS, 0, 0,
+                                 "Error(s) occurred on some resources during "
+                                 "the COPY/MOVE process.");
+        }
+
+        return NULL;
+    }
+
+    /* not a collection */
+    if ((err = dav_fs_copymove_file(is_move, src->info->pool,
+                                    src->info->pathname, dst->info->pathname,
+                                    &src->info->finfo,
+                                    dst->exists ? &dst->info->finfo : NULL,
+                                    &work_buf)) != NULL) {
+        /* ### push a higher-level description? */
+        return err;
+    }
+
+    /* copy/move properties as well */
+    return dav_fs_copymoveset(is_move, src->info->pool, src, dst, &work_buf);
+}
+
+static dav_error * dav_fs_copy_resource(
+    const dav_resource *src,
+    dav_resource *dst,
+    int depth,
+    dav_response **response)
+{
+    dav_error *err;
+
+#if DAV_DEBUG
+    if (src->hooks != dst->hooks) {
+        /*
+        ** ### strictly speaking, this is a design error; we should not
+        ** ### have reached this point.
+        */
+        return dav_new_error(src->info->pool, HTTP_INTERNAL_SERVER_ERROR, 0, 0,
+                             "DESIGN ERROR: a mix of repositories "
+                             "was passed to copy_resource.");
+    }
+#endif
+
+    if ((err = dav_fs_copymove_resource(0, src, dst, depth,
+                                        response)) == NULL) {
+
+        /* update state of destination resource to show it exists */
+        dst->exists = 1;
+        dst->collection = src->collection;
+    }
+
+    return err;
+}
+
+static dav_error * dav_fs_move_resource(
+    dav_resource *src,
+    dav_resource *dst,
+    dav_response **response)
+{
+    dav_resource_private *srcinfo = src->info;
+    dav_resource_private *dstinfo = dst->info;
+    dav_error *err;
+    apr_status_t rv;
+
+#if DAV_DEBUG
+    if (src->hooks != dst->hooks) {
+        /*
+        ** ### strictly speaking, this is a design error; we should not
+        ** ### have reached this point.
+        */
+        return dav_new_error(src->info->pool, HTTP_INTERNAL_SERVER_ERROR, 0, 0,
+                             "DESIGN ERROR: a mix of repositories "
+                             "was passed to move_resource.");
+    }
+#endif
+
+
+    /* try rename first */
+    rv = apr_file_rename(srcinfo->pathname, dstinfo->pathname, srcinfo->pool);
+
+    /* if we can't simply rename, then do it the hard way... */
+    if (APR_STATUS_IS_EXDEV(rv)) {
+        if ((err = dav_fs_copymove_resource(1, src, dst, DAV_INFINITY,
+                                            response)) == NULL) {
+            /* update resource states */
+            dst->exists = 1;
+            dst->collection = src->collection;
+            src->exists = 0;
+            src->collection = 0;
+        }
+
+        return err;
+    }
+
+    /* no multistatus response */
+    *response = NULL;
+
+    if (rv != APR_SUCCESS) {
+        /* ### should have a better error than this. */
+        return dav_new_error(srcinfo->pool, HTTP_INTERNAL_SERVER_ERROR, 0, rv,
+                             "Could not rename resource.");
+    }
+
+    /* Rename did work. Update resource states and move properties as well */
+    dst->exists = 1;
+    dst->collection = src->collection;
+    src->exists = 0;
+    src->collection = 0;
+
+    if ((err = dav_fs_copymoveset(1, src->info->pool,
+                                  src, dst, NULL)) == NULL) {
+        /* no error. we're done. go ahead and return now. */
+        return NULL;
+    }
+
+    /* error occurred during properties move; try to put resource back */
+    if (apr_file_rename(dstinfo->pathname, srcinfo->pathname,
+                       srcinfo->pool) != APR_SUCCESS) {
+        /* couldn't put it back! */
+        return dav_push_error(srcinfo->pool,
+                              HTTP_INTERNAL_SERVER_ERROR, 0,
+                              "The resource was moved, but a failure "
+                              "occurred during the move of its "
+                              "properties. The resource could not be "
+                              "restored to its original location. The "
+                              "server is now in an inconsistent state.",
+                              err);
+    }
+
+    /* update resource states again */
+    src->exists = 1;
+    src->collection = dst->collection;
+    dst->exists = 0;
+    dst->collection = 0;
+
+    /* resource moved back, but properties may be inconsistent */
+    return dav_push_error(srcinfo->pool,
+                          HTTP_INTERNAL_SERVER_ERROR, 0,
+                          "The resource was moved, but a failure "
+                          "occurred during the move of its properties. "
+                          "The resource was moved back to its original "
+                          "location, but its properties may have been "
+                          "partially moved. The server may be in an "
+                          "inconsistent state.",
+                          err);
+}
+
+static dav_error * dav_fs_delete_walker(dav_walk_resource *wres, int calltype)
+{
+    dav_resource_private *info = wres->resource->info;
+
+    /* do not attempt to remove a null resource,
+     * or a collection with children
+     */
+    if (wres->resource->exists &&
+        (!wres->resource->collection || calltype == DAV_CALLTYPE_POSTFIX)) {
+        /* try to remove the resource */
+        apr_status_t result;
+
+        result = wres->resource->collection
+            ? apr_dir_remove(info->pathname, wres->pool)
+            : apr_file_remove(info->pathname, wres->pool);
+
+        /*
+        ** If an error occurred, then add it to multistatus response.
+        ** Note that we add it for the root resource, too. It is quite
+        ** possible to delete the whole darn tree, yet fail on the root.
+        **
+        ** (also: remember we are deleting via a postfix traversal)
+        */
+        if (result != APR_SUCCESS) {
+            /* ### assume there is a permissions problem */
+
+            /* ### use errno to generate DAV:responsedescription? */
+            dav_add_response(wres, HTTP_FORBIDDEN, NULL);
+        }
+    }
+
+    return NULL;
+}
+
+static dav_error * dav_fs_remove_resource(dav_resource *resource,
+                                          dav_response **response)
+{
+    apr_status_t status;
+    dav_resource_private *info = resource->info;
+
+    *response = NULL;
+
+    /* if a collection, recursively remove it and its children,
+     * including the state dirs
+     */
+    if (resource->collection) {
+        dav_walk_params params = { 0 };
+        dav_error *err = NULL;
+        dav_response *multi_status;
+
+        params.walk_type = (DAV_WALKTYPE_NORMAL
+                            | DAV_WALKTYPE_HIDDEN
+                            | DAV_WALKTYPE_POSTFIX);
+        params.func = dav_fs_delete_walker;
+        params.pool = info->pool;
+        params.root = resource;
+
+        if ((err = dav_fs_walk(&params, DAV_INFINITY,
+                               &multi_status)) != NULL) {
+            /* on a "real" error, then just punt. nothing else to do. */
+            return err;
+        }
+
+        if ((*response = multi_status) != NULL) {
+            /* some multistatus responses exist. wrap them in a 207 */
+            return dav_new_error(info->pool, HTTP_MULTI_STATUS, 0, 0,
+                                 "Error(s) occurred on some resources during "
+                                 "the deletion process.");
+        }
+
+        /* no errors... update resource state */
+        resource->exists = 0;
+        resource->collection = 0;
+
+        return NULL;
+    }
+
+    /* not a collection; remove the file and its properties */
+    if ((status = apr_file_remove(info->pathname, info->pool)) != APR_SUCCESS) {
+        /* ### put a description in here */
+        return dav_new_error(info->pool, HTTP_FORBIDDEN, 0, status, NULL);
+    }
+
+    /* update resource state */
+    resource->exists = 0;
+    resource->collection = 0;
+
+    /* remove properties and return its result */
+    return dav_fs_deleteset(info->pool, resource);
+}
+
+/* ### move this to dav_util? */
+/* Walk recursively down through directories, *
+ * including lock-null resources as we go.    */
+static dav_error * dav_fs_walker(dav_fs_walker_context *fsctx, int depth)
+{
+    const dav_walk_params *params = fsctx->params;
+    apr_pool_t *pool = params->pool;
+    apr_status_t status;
+    dav_error *err = NULL;
+    int isdir = fsctx->res1.collection;
+    apr_finfo_t dirent;
+    apr_dir_t *dirp;
+
+    /* ensure the context is prepared properly, then call the func */
+    err = (*params->func)(&fsctx->wres,
+                          isdir
+                          ? DAV_CALLTYPE_COLLECTION
+                          : DAV_CALLTYPE_MEMBER);
+    if (err != NULL) {
+        return err;
+    }
+
+    if (depth == 0 || !isdir) {
+        return NULL;
+    }
+
+    /* put a trailing slash onto the directory, in preparation for appending
+     * files to it as we discovery them within the directory */
+    dav_check_bufsize(pool, &fsctx->path1, DAV_BUFFER_PAD);
+    fsctx->path1.buf[fsctx->path1.cur_len++] = '/';
+    fsctx->path1.buf[fsctx->path1.cur_len] = '\0';        /* in pad area */
+
+    /* if a secondary path is present, then do that, too */
+    if (fsctx->path2.buf != NULL) {
+        dav_check_bufsize(pool, &fsctx->path2, DAV_BUFFER_PAD);
+        fsctx->path2.buf[fsctx->path2.cur_len++] = '/';
+        fsctx->path2.buf[fsctx->path2.cur_len] = '\0';        /* in pad area */
+    }
+
+    /* Note: the URI should ALREADY have a trailing "/" */
+
+    /* for this first pass of files, all resources exist */
+    fsctx->res1.exists = 1;
+
+    /* a file is the default; we'll adjust if we hit a directory */
+    fsctx->res1.collection = 0;
+    fsctx->res2.collection = 0;
+
+    /* open and scan the directory */
+    if ((status = apr_dir_open(&dirp, fsctx->path1.buf, pool)) != APR_SUCCESS) {
+        /* ### need a better error */
+        return dav_new_error(pool, HTTP_NOT_FOUND, 0, status, NULL);
+    }
+    while ((apr_dir_read(&dirent, APR_FINFO_DIRENT, dirp)) == APR_SUCCESS) {
+        apr_size_t len;
+
+        len = strlen(dirent.name);
+
+        /* avoid recursing into our current, parent, or state directories */
+        if (dirent.name[0] == '.'
+              && (len == 1 || (dirent.name[1] == '.' && len == 2))) {
+            continue;
+        }
+
+        if (params->walk_type & DAV_WALKTYPE_AUTH) {
+            /* ### need to authorize each file */
+            /* ### example: .htaccess is normally configured to fail auth */
+
+            /* stuff in the state directory and temp files are never authorized! */
+            if (!strcmp(dirent.name, DAV_FS_STATE_DIR) ||
+                !strncmp(dirent.name, DAV_FS_TMP_PREFIX,
+                         strlen(DAV_FS_TMP_PREFIX))) {
+                continue;
+            }
+        }
+        /* skip the state dir and temp files unless a HIDDEN is performed */
+        if (!(params->walk_type & DAV_WALKTYPE_HIDDEN)
+            && (!strcmp(dirent.name, DAV_FS_STATE_DIR) ||
+                !strncmp(dirent.name, DAV_FS_TMP_PREFIX,
+                         strlen(DAV_FS_TMP_PREFIX)))) {
+            continue;
+        }
+
+        /* append this file onto the path buffer (copy null term) */
+        dav_buffer_place_mem(pool, &fsctx->path1, dirent.name, len + 1, 0);
+
+        status = apr_stat(&fsctx->info1.finfo, fsctx->path1.buf,
+                          DAV_FINFO_MASK, pool);
+        if (status != APR_SUCCESS && status != APR_INCOMPLETE) {
+            /* woah! where'd it go? */
+            /* ### should have a better error here */
+            err = dav_new_error(pool, HTTP_NOT_FOUND, 0, status, NULL);
+            break;
+        }
+
+        /* copy the file to the URI, too. NOTE: we will pad an extra byte
+           for the trailing slash later. */
+        dav_buffer_place_mem(pool, &fsctx->uri_buf, dirent.name, len + 1, 1);
+
+        /* if there is a secondary path, then do that, too */
+        if (fsctx->path2.buf != NULL) {
+            dav_buffer_place_mem(pool, &fsctx->path2, dirent.name, len + 1, 0);
+        }
+
+        /* set up the (internal) pathnames for the two resources */
+        fsctx->info1.pathname = fsctx->path1.buf;
+        fsctx->info2.pathname = fsctx->path2.buf;
+
+        /* set up the URI for the current resource */
+        fsctx->res1.uri = fsctx->uri_buf.buf;
+
+        /* ### for now, only process regular files (e.g. skip symlinks) */
+        if (fsctx->info1.finfo.filetype == APR_REG) {
+            /* call the function for the specified dir + file */
+            if ((err = (*params->func)(&fsctx->wres,
+                                       DAV_CALLTYPE_MEMBER)) != NULL) {
+                /* ### maybe add a higher-level description? */
+                break;
+            }
+        }
+        else if (fsctx->info1.finfo.filetype == APR_DIR) {
+            apr_size_t save_path_len = fsctx->path1.cur_len;
+            apr_size_t save_uri_len = fsctx->uri_buf.cur_len;
+            apr_size_t save_path2_len = fsctx->path2.cur_len;
+
+            /* adjust length to incorporate the subdir name */
+            fsctx->path1.cur_len += len;
+            fsctx->path2.cur_len += len;
+
+            /* adjust URI length to incorporate subdir and a slash */
+            fsctx->uri_buf.cur_len += len + 1;
+            fsctx->uri_buf.buf[fsctx->uri_buf.cur_len - 1] = '/';
+            fsctx->uri_buf.buf[fsctx->uri_buf.cur_len] = '\0';
+
+            /* switch over to a collection */
+            fsctx->res1.collection = 1;
+            fsctx->res2.collection = 1;
+
+            /* recurse on the subdir */
+            /* ### don't always want to quit on error from single child */
+            if ((err = dav_fs_walker(fsctx, depth - 1)) != NULL) {
+                /* ### maybe add a higher-level description? */
+                break;
+            }
+
+            /* put the various information back */
+            fsctx->path1.cur_len = save_path_len;
+            fsctx->path2.cur_len = save_path2_len;
+            fsctx->uri_buf.cur_len = save_uri_len;
+
+            fsctx->res1.collection = 0;
+            fsctx->res2.collection = 0;
+
+            /* assert: res1.exists == 1 */
+        }
+    }
+
+    /* ### check the return value of this? */
+    apr_dir_close(dirp);
+
+    if (err != NULL)
+        return err;
+
+    if (params->walk_type & DAV_WALKTYPE_LOCKNULL) {
+        apr_size_t offset = 0;
+
+        /* null terminate the directory name */
+        fsctx->path1.buf[fsctx->path1.cur_len - 1] = '\0';
+
+        /* Include any lock null resources found in this collection */
+        fsctx->res1.collection = 1;
+        if ((err = dav_fs_get_locknull_members(&fsctx->res1,
+                                               &fsctx->locknull_buf)) != NULL) {
+            /* ### maybe add a higher-level description? */
+            return err;
+        }
+
+        /* put a slash back on the end of the directory */
+        fsctx->path1.buf[fsctx->path1.cur_len - 1] = '/';
+
+        /* these are all non-existant (files) */
+        fsctx->res1.exists = 0;
+        fsctx->res1.collection = 0;
+        memset(&fsctx->info1.finfo, 0, sizeof(fsctx->info1.finfo));
+
+        while (offset < fsctx->locknull_buf.cur_len) {
+            apr_size_t len = strlen(fsctx->locknull_buf.buf + offset);
+            dav_lock *locks = NULL;
+
+            /*
+            ** Append the locknull file to the paths and the URI. Note that
+            ** we don't have to pad the URI for a slash since a locknull
+            ** resource is not a collection.
+            */
+            dav_buffer_place_mem(pool, &fsctx->path1,
+                                 fsctx->locknull_buf.buf + offset, len + 1, 0);
+            dav_buffer_place_mem(pool, &fsctx->uri_buf,
+                                 fsctx->locknull_buf.buf + offset, len + 1, 0);
+            if (fsctx->path2.buf != NULL) {
+                dav_buffer_place_mem(pool, &fsctx->path2,
+                                     fsctx->locknull_buf.buf + offset,
+                                     len + 1, 0);
+            }
+
+            /* set up the (internal) pathnames for the two resources */
+            fsctx->info1.pathname = fsctx->path1.buf;
+            fsctx->info2.pathname = fsctx->path2.buf;
+
+            /* set up the URI for the current resource */
+            fsctx->res1.uri = fsctx->uri_buf.buf;
+
+            /*
+            ** To prevent a PROPFIND showing an expired locknull
+            ** resource, query the lock database to force removal
+            ** of both the lock entry and .locknull, if necessary..
+            ** Sure, the query in PROPFIND would do this.. after
+            ** the locknull resource was already included in the
+            ** return.
+            **
+            ** NOTE: we assume the caller has opened the lock database
+            **       if they have provided DAV_WALKTYPE_LOCKNULL.
+            */
+            /* ### we should also look into opening it read-only and
+               ### eliding timed-out items from the walk, yet leaving
+               ### them in the locknull database until somebody opens
+               ### the thing writable.
+               */
+            /* ### probably ought to use has_locks. note the problem
+               ### mentioned above, though... we would traverse this as
+               ### a locknull, but then a PROPFIND would load the lock
+               ### info, causing a timeout and the locks would not be
+               ### reported. Therefore, a null resource would be returned
+               ### in the PROPFIND.
+               ###
+               ### alternative: just load unresolved locks. any direct
+               ### locks will be timed out (correct). any indirect will
+               ### not (correct; consider if a parent timed out -- the
+               ### timeout routines do not walk and remove indirects;
+               ### even the resolve func would probably fail when it
+               ### tried to find a timed-out direct lock).
+            */
+            if ((err = dav_lock_query(params->lockdb, &fsctx->res1,
+                                      &locks)) != NULL) {
+                /* ### maybe add a higher-level description? */
+                return err;
+            }
+
+            /* call the function for the specified dir + file */
+            if (locks != NULL &&
+                (err = (*params->func)(&fsctx->wres,
+                                       DAV_CALLTYPE_LOCKNULL)) != NULL) {
+                /* ### maybe add a higher-level description? */
+                return err;
+            }
+
+            offset += len + 1;
+        }
+
+        /* reset the exists flag */
+        fsctx->res1.exists = 1;
+    }
+
+    if (params->walk_type & DAV_WALKTYPE_POSTFIX) {
+        /* replace the dirs' trailing slashes with null terms */
+        fsctx->path1.buf[--fsctx->path1.cur_len] = '\0';
+        fsctx->uri_buf.buf[--fsctx->uri_buf.cur_len] = '\0';
+        if (fsctx->path2.buf != NULL) {
+            fsctx->path2.buf[--fsctx->path2.cur_len] = '\0';
+        }
+
+        /* this is a collection which exists */
+        fsctx->res1.collection = 1;
+
+        return (*params->func)(&fsctx->wres, DAV_CALLTYPE_POSTFIX);
+    }
+
+    return NULL;
+}
+
+static dav_error * dav_fs_internal_walk(const dav_walk_params *params,
+                                        int depth, int is_move,
+                                        const dav_resource *root_dst,
+                                        dav_response **response)
+{
+    dav_fs_walker_context fsctx = { 0 };
+    dav_error *err;
+    dav_fs_copymove_walk_ctx cm_ctx = { 0 };
+
+#if DAV_DEBUG
+    if ((params->walk_type & DAV_WALKTYPE_LOCKNULL) != 0
+        && params->lockdb == NULL) {
+        return dav_new_error(params->pool, HTTP_INTERNAL_SERVER_ERROR, 0, 0,
+                             "DESIGN ERROR: walker called to walk locknull "
+                             "resources, but a lockdb was not provided.");
+    }
+#endif
+
+    fsctx.params = params;
+    fsctx.wres.walk_ctx = params->walk_ctx;
+    fsctx.wres.pool = params->pool;
+
+    /* ### zero out versioned, working, baselined? */
+
+    fsctx.res1 = *params->root;
+    fsctx.res1.pool = params->pool;
+
+    fsctx.res1.info = &fsctx.info1;
+    fsctx.info1 = *params->root->info;
+
+    /* the pathname is stored in the path1 buffer */
+    dav_buffer_init(params->pool, &fsctx.path1, fsctx.info1.pathname);
+    fsctx.info1.pathname = fsctx.path1.buf;
+
+    if (root_dst != NULL) {
+        /* internal call from the COPY/MOVE code. set it up. */
+
+        fsctx.wres.walk_ctx = &cm_ctx;
+        cm_ctx.is_move = is_move;
+        cm_ctx.res_dst = &fsctx.res2;
+        cm_ctx.root = params->root;
+        cm_ctx.pool = params->pool;
+
+        fsctx.res2 = *root_dst;
+        fsctx.res2.exists = 0;
+        fsctx.res2.collection = 0;
+        fsctx.res2.uri = NULL;          /* we don't track this */
+        fsctx.res2.pool = params->pool;
+
+        fsctx.res2.info = &fsctx.info2;
+        fsctx.info2 = *root_dst->info;
+
+        /* res2 does not exist -- clear its finfo structure */
+        memset(&fsctx.info2.finfo, 0, sizeof(fsctx.info2.finfo));
+
+        /* the pathname is stored in the path2 buffer */
+        dav_buffer_init(params->pool, &fsctx.path2, fsctx.info2.pathname);
+        fsctx.info2.pathname = fsctx.path2.buf;
+    }
+
+    /* prep the URI buffer */
+    dav_buffer_init(params->pool, &fsctx.uri_buf, params->root->uri);
+
+    /* if we have a directory, then ensure the URI has a trailing "/" */
+    if (fsctx.res1.collection
+        && fsctx.uri_buf.buf[fsctx.uri_buf.cur_len - 1] != '/') {
+
+        /* this will fall into the pad area */
+        fsctx.uri_buf.buf[fsctx.uri_buf.cur_len++] = '/';
+        fsctx.uri_buf.buf[fsctx.uri_buf.cur_len] = '\0';
+    }
+
+    /* the current resource's URI is stored in the uri_buf buffer */
+    fsctx.res1.uri = fsctx.uri_buf.buf;
+
+    /* point the callback's resource at our structure */
+    fsctx.wres.resource = &fsctx.res1;
+
+    /* always return the error, and any/all multistatus responses */
+    err = dav_fs_walker(&fsctx, depth);
+    *response = fsctx.wres.response;
+    return err;
+}
+
+static dav_error * dav_fs_walk(const dav_walk_params *params, int depth,
+                               dav_response **response)
+{
+    /* always return the error, and any/all multistatus responses */
+    return dav_fs_internal_walk(params, depth, 0, NULL, response);
+}
+
+/* dav_fs_etag:  Stolen from ap_make_etag.  Creates a strong etag
+ *    for file path.
+ * ### do we need to return weak tags sometimes?
+ */
+static const char *dav_fs_getetag(const dav_resource *resource)
+{
+    dav_resource_private *ctx = resource->info;
+    /* XXX: This should really honor the FileETag setting */
+
+    if (!resource->exists)
+        return apr_pstrdup(ctx->pool, "");
+
+    if (ctx->finfo.filetype != APR_NOFILE) {
+        return apr_psprintf(ctx->pool, "\"%" APR_UINT64_T_HEX_FMT "-%"
+                            APR_UINT64_T_HEX_FMT "\"",
+                            (apr_uint64_t) ctx->finfo.size,
+                            (apr_uint64_t) ctx->finfo.mtime);
+    }
+
+    return apr_psprintf(ctx->pool, "\"%" APR_UINT64_T_HEX_FMT "\"",
+                       (apr_uint64_t) ctx->finfo.mtime);
+}
+
+static const dav_hooks_repository dav_hooks_repository_fs =
+{
+    DEBUG_GET_HANDLER,   /* normally: special GET handling not required */
+    dav_fs_get_resource,
+    dav_fs_get_parent_resource,
+    dav_fs_is_same_resource,
+    dav_fs_is_parent_resource,
+    dav_fs_open_stream,
+    dav_fs_close_stream,
+    dav_fs_write_stream,
+    dav_fs_seek_stream,
+#if DEBUG_GET_HANDLER
+    dav_fs_set_headers,
+    dav_fs_deliver,
+#else
+    NULL,
+    NULL,
+#endif
+    dav_fs_create_collection,
+    dav_fs_copy_resource,
+    dav_fs_move_resource,
+    dav_fs_remove_resource,
+    dav_fs_walk,
+    dav_fs_getetag,
+    NULL,
+    dav_fs_get_request_rec,
+    dav_fs_pathname
+};
+
+static dav_prop_insert dav_fs_insert_prop(const dav_resource *resource,
+                                          int propid, dav_prop_insert what,
+                                          apr_text_header *phdr)
+{
+    const char *value;
+    const char *s;
+    apr_pool_t *p = resource->info->pool;
+    const dav_liveprop_spec *info;
+    int global_ns;
+
+    /* an HTTP-date can be 29 chars plus a null term */
+    /* a 64-bit size can be 20 chars plus a null term */
+    char buf[DAV_TIMEBUF_SIZE];
+
+    /*
+    ** None of FS provider properties are defined if the resource does not
+    ** exist. Just bail for this case.
+    **
+    ** Even though we state that the FS properties are not defined, the
+    ** client cannot store dead values -- we deny that thru the is_writable
+    ** hook function.
+    */
+    if (!resource->exists)
+        return DAV_PROP_INSERT_NOTDEF;
+
+    switch (propid) {
+    case DAV_PROPID_creationdate:
+        /*
+        ** Closest thing to a creation date. since we don't actually
+        ** perform the operations that would modify ctime (after we
+        ** create the file), then we should be pretty safe here.
+        */
+        dav_format_time(DAV_STYLE_ISO8601,
+                        resource->info->finfo.ctime,
+                        buf, sizeof(buf));
+        value = buf;
+        break;
+
+    case DAV_PROPID_getcontentlength:
+        /* our property, but not defined on collection resources */
+        if (resource->collection)
+            return DAV_PROP_INSERT_NOTDEF;
+
+        apr_snprintf(buf, sizeof(buf), "%" APR_OFF_T_FMT, resource->info->finfo.size);
+        value = buf;
+        break;
+
+    case DAV_PROPID_getetag:
+        value = dav_fs_getetag(resource);
+        break;
+
+    case DAV_PROPID_getlastmodified:
+        dav_format_time(DAV_STYLE_RFC822,
+                        resource->info->finfo.mtime,
+                        buf, sizeof(buf));
+        value = buf;
+        break;
+
+    case DAV_PROPID_FS_executable:
+        /* our property, but not defined on collection resources */
+        if (resource->collection)
+            return DAV_PROP_INSERT_NOTDEF;
+
+        /* our property, but not defined on this platform */
+        if (!(resource->info->finfo.valid & APR_FINFO_UPROT))
+            return DAV_PROP_INSERT_NOTDEF;
+
+        /* the files are "ours" so we only need to check owner exec privs */
+        if (resource->info->finfo.protection & APR_UEXECUTE)
+            value = "T";
+        else
+            value = "F";
+        break;
+
+    default:
+        /* ### what the heck was this property? */
+        return DAV_PROP_INSERT_NOTDEF;
+    }
+
+    /* assert: value != NULL */
+
+    /* get the information and global NS index for the property */
+    global_ns = dav_get_liveprop_info(propid, &dav_fs_liveprop_group, &info);
+
+    /* assert: info != NULL && info->name != NULL */
+
+    /* DBG3("FS: inserting lp%d:%s  (local %d)", ns, scan->name, scan->ns); */
+
+    if (what == DAV_PROP_INSERT_VALUE) {
+        s = apr_psprintf(p, "<lp%d:%s>%s</lp%d:%s>" DEBUG_CR,
+                         global_ns, info->name, value, global_ns, info->name);
+    }
+    else if (what == DAV_PROP_INSERT_NAME) {
+        s = apr_psprintf(p, "<lp%d:%s/>" DEBUG_CR, global_ns, info->name);
+    }
+    else {
+        /* assert: what == DAV_PROP_INSERT_SUPPORTED */
+        s = apr_psprintf(p,
+                         "<D:supported-live-property D:name=\"%s\" "
+                         "D:namespace=\"%s\"/>" DEBUG_CR,
+                         info->name, dav_fs_namespace_uris[info->ns]);
+    }
+    apr_text_append(p, phdr, s);
+
+    /* we inserted what was asked for */
+    return what;
+}
+
+static int dav_fs_is_writable(const dav_resource *resource, int propid)
+{
+    const dav_liveprop_spec *info;
+
+#ifdef DAV_FS_HAS_EXECUTABLE
+    /* if we have the executable property, and this isn't a collection,
+       then the property is writable. */
+    if (propid == DAV_PROPID_FS_executable && !resource->collection)
+        return 1;
+#endif
+
+    (void) dav_get_liveprop_info(propid, &dav_fs_liveprop_group, &info);
+    return info->is_writable;
+}
+
+static dav_error *dav_fs_patch_validate(const dav_resource *resource,
+                                        const apr_xml_elem *elem,
+                                        int operation,
+                                        void **context,
+                                        int *defer_to_dead)
+{
+    const apr_text *cdata;
+    const apr_text *f_cdata;
+    char value;
+    dav_elem_private *priv = elem->priv;
+
+    if (priv->propid != DAV_PROPID_FS_executable) {
+        *defer_to_dead = 1;
+        return NULL;
+    }
+
+    if (operation == DAV_PROP_OP_DELETE) {
+        return dav_new_error(resource->info->pool, HTTP_CONFLICT, 0, 0,
+                             "The 'executable' property cannot be removed.");
+    }
+
+    cdata = elem->first_cdata.first;
+
+    /* ### hmm. this isn't actually looking at all the possible text items */
+    f_cdata = elem->first_child == NULL
+        ? NULL
+        : elem->first_child->following_cdata.first;
+
+    /* DBG3("name=%s  cdata=%s  f_cdata=%s",elem->name,cdata ? cdata->text : "[null]",f_cdata ? f_cdata->text : "[null]"); */
+
+    if (cdata == NULL) {
+        if (f_cdata == NULL) {
+            return dav_new_error(resource->info->pool, HTTP_CONFLICT, 0, 0,
+                                 "The 'executable' property expects a single "
+                                 "character, valued 'T' or 'F'. There was no "
+                                 "value submitted.");
+        }
+        cdata = f_cdata;
+    }
+    else if (f_cdata != NULL)
+        goto too_long;
+
+    if (cdata->next != NULL || strlen(cdata->text) != 1)
+        goto too_long;
+
+    value = cdata->text[0];
+    if (value != 'T' && value != 'F') {
+        return dav_new_error(resource->info->pool, HTTP_CONFLICT, 0, 0,
+                             "The 'executable' property expects a single "
+                             "character, valued 'T' or 'F'. The value "
+                             "submitted is invalid.");
+    }
+
+    *context = (void *)((long)(value == 'T'));
+
+    return NULL;
+
+  too_long:
+    return dav_new_error(resource->info->pool, HTTP_CONFLICT, 0, 0,
+                         "The 'executable' property expects a single "
+                         "character, valued 'T' or 'F'. The value submitted "
+                         "has too many characters.");
+
+}
+
+static dav_error *dav_fs_patch_exec(const dav_resource *resource,
+                                    const apr_xml_elem *elem,
+                                    int operation,
+                                    void *context,
+                                    dav_liveprop_rollback **rollback_ctx)
+{
+    long value = context != NULL;
+    apr_fileperms_t perms = resource->info->finfo.protection;
+    apr_status_t status;
+    long old_value = (perms & APR_UEXECUTE) != 0;
+
+    /* assert: prop == executable. operation == SET. */
+
+    /* don't do anything if there is no change. no rollback info either. */
+    /* DBG2("new value=%d  (old=%d)", value, old_value); */
+    if (value == old_value)
+        return NULL;
+
+    perms &= ~APR_UEXECUTE;
+    if (value)
+        perms |= APR_UEXECUTE;
+
+    if ((status = apr_file_perms_set(resource->info->pathname, perms))
+        != APR_SUCCESS) {
+        return dav_new_error(resource->info->pool,
+                             HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "Could not set the executable flag of the "
+                             "target resource.");
+    }
+
+    /* update the resource and set up the rollback context */
+    resource->info->finfo.protection = perms;
+    *rollback_ctx = (dav_liveprop_rollback *)old_value;
+
+    return NULL;
+}
+
+static void dav_fs_patch_commit(const dav_resource *resource,
+                                int operation,
+                                void *context,
+                                dav_liveprop_rollback *rollback_ctx)
+{
+    /* nothing to do */
+}
+
+static dav_error *dav_fs_patch_rollback(const dav_resource *resource,
+                                        int operation,
+                                        void *context,
+                                        dav_liveprop_rollback *rollback_ctx)
+{
+    apr_fileperms_t perms = resource->info->finfo.protection & ~APR_UEXECUTE;
+    apr_status_t status;
+    int value = rollback_ctx != NULL;
+
+    /* assert: prop == executable. operation == SET. */
+
+    /* restore the executable bit */
+    if (value)
+        perms |= APR_UEXECUTE;
+
+    if ((status = apr_file_perms_set(resource->info->pathname, perms))
+        != APR_SUCCESS) {
+        return dav_new_error(resource->info->pool,
+                             HTTP_INTERNAL_SERVER_ERROR, 0, status,
+                             "After a failure occurred, the resource's "
+                             "executable flag could not be restored.");
+    }
+
+    /* restore the resource's state */
+    resource->info->finfo.protection = perms;
+
+    return NULL;
+}
+
+
+static const dav_hooks_liveprop dav_hooks_liveprop_fs =
+{
+    dav_fs_insert_prop,
+    dav_fs_is_writable,
+    dav_fs_namespace_uris,
+    dav_fs_patch_validate,
+    dav_fs_patch_exec,
+    dav_fs_patch_commit,
+    dav_fs_patch_rollback
+};
+
+static const dav_provider dav_fs_provider =
+{
+    &dav_hooks_repository_fs,
+    &dav_hooks_db_dbm,
+    &dav_hooks_locks_fs,
+    NULL,               /* vsn */
+    NULL,               /* binding */
+    NULL,               /* search */
+
+    NULL                /* ctx */
+};
+
+void dav_fs_gather_propsets(apr_array_header_t *uris)
+{
+#ifdef DAV_FS_HAS_EXECUTABLE
+    *(const char **)apr_array_push(uris) =
+        "<http://apache.org/dav/propset/fs/1>";
+#endif
+}
+
+int dav_fs_find_liveprop(const dav_resource *resource,
+                         const char *ns_uri, const char *name,
+                         const dav_hooks_liveprop **hooks)
+{
+    /* don't try to find any liveprops if this isn't "our" resource */
+    if (resource->hooks != &dav_hooks_repository_fs)
+        return 0;
+    return dav_do_find_liveprop(ns_uri, name, &dav_fs_liveprop_group, hooks);
+}
+
+void dav_fs_insert_all_liveprops(request_rec *r, const dav_resource *resource,
+                                 dav_prop_insert what, apr_text_header *phdr)
+{
+    /* don't insert any liveprops if this isn't "our" resource */
+    if (resource->hooks != &dav_hooks_repository_fs)
+        return;
+
+    if (!resource->exists) {
+        /* a lock-null resource */
+        /*
+        ** ### technically, we should insert empty properties. dunno offhand
+        ** ### what part of the spec said this, but it was essentially thus:
+        ** ### "the properties should be defined, but may have no value".
+        */
+        return;
+    }
+
+    (void) dav_fs_insert_prop(resource, DAV_PROPID_creationdate,
+                              what, phdr);
+    (void) dav_fs_insert_prop(resource, DAV_PROPID_getcontentlength,
+                              what, phdr);
+    (void) dav_fs_insert_prop(resource, DAV_PROPID_getlastmodified,
+                              what, phdr);
+    (void) dav_fs_insert_prop(resource, DAV_PROPID_getetag,
+                              what, phdr);
+
+#ifdef DAV_FS_HAS_EXECUTABLE
+    /* Only insert this property if it is defined for this platform. */
+    (void) dav_fs_insert_prop(resource, DAV_PROPID_FS_executable,
+                              what, phdr);
+#endif
+
+    /* ### we know the others aren't defined as liveprops */
+}
+
+void dav_fs_register(apr_pool_t *p)
+{
+    /* register the namespace URIs */
+    dav_register_liveprop_group(p, &dav_fs_liveprop_group);
+
+    /* register the repository provider */
+    dav_register_provider(p, "filesystem", &dav_fs_provider);
+}