repos.c revision b0fb330a8581c8bfab5e523084f9f39264a52b12
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/* ====================================================================
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * The Apache Software License, Version 1.1
fd9abdda70912b99b24e3bf1a38f26fde908a74cnd *
fd9abdda70912b99b24e3bf1a38f26fde908a74cnd * Copyright (c) 2000 The Apache Software Foundation. All rights
fd9abdda70912b99b24e3bf1a38f26fde908a74cnd * reserved.
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl *
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * Redistribution and use in source and binary forms, with or without
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * modification, are permitted provided that the following conditions
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * are met:
96ad5d81ee4a2cc66a4ae19893efc8aa6d06fae7jailletc *
8dd59c49fc0406c986dcb887651133d9978f2249noodl * 1. Redistributions of source code must retain the above copyright
8dd59c49fc0406c986dcb887651133d9978f2249noodl * notice, this list of conditions and the following disclaimer.
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen *
2e545ce2450a9953665f701bb05350f0d3f26275nd * 2. Redistributions in binary form must reproduce the above copyright
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen * notice, this list of conditions and the following disclaimer in
d29d9ab4614ff992b0e8de6e2b88d52b6f1f153erbowen * the documentation and/or other materials provided with the
8dd59c49fc0406c986dcb887651133d9978f2249noodl * distribution.
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl *
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * 3. The end-user documentation included with the redistribution,
af33a4994ae2ff15bc67d19ff1a7feb906745bf8rbowen * if any, must include the following acknowledgment:
3f08db06526d6901aa08c110b5bc7dde6bc39905nd * "This product includes software developed by the
8dd59c49fc0406c986dcb887651133d9978f2249noodl * Apache Software Foundation (http://www.apache.org/)."
8dd59c49fc0406c986dcb887651133d9978f2249noodl * Alternately, this acknowledgment may appear in the software itself,
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * if and wherever such third-party acknowledgments normally appear.
3f08db06526d6901aa08c110b5bc7dde6bc39905nd *
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * 4. The names "Apache" and "Apache Software Foundation" must
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi * not be used to endorse or promote products derived from this
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * software without prior written permission. For written
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi * permission, please contact apache@apache.org.
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung *
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * 5. Products derived from this software may not be called "Apache",
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * nor may "Apache" appear in their name, without prior written
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi * permission of the Apache Software Foundation.
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi *
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
8dd59c49fc0406c986dcb887651133d9978f2249noodl * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
1f1b6bf13313fdd14a45e52e553d3ff28689b717coar * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
8dd59c49fc0406c986dcb887651133d9978f2249noodl * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * SUCH DAMAGE.
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * ====================================================================
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl *
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * This software consists of voluntary contributions made by many
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * individuals on behalf of the Apache Software Foundation. For more
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * information on the Apache Software Foundation, please see
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl * <http://www.apache.org/>.
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi */
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashi
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/*
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl** DAV filesystem-based repository provider
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl*/
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include <string.h>
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include "httpd.h"
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include "http_log.h"
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include "http_protocol.h" /* for ap_set_* (in dav_fs_set_headers) */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include "http_request.h" /* for ap_update_mtime() */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#include "mod_dav.h"
5ae609a8a09239d20f48a4a95c4f21b713995babwrowe#include "dav_fs_repos.h"
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/* to assist in debugging mod_dav's GET handling */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#define DEBUG_GET_HANDLER 0
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#define DEBUG_PATHNAME_STYLE 0
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl#define DAV_FS_COPY_BLOCKSIZE 16384 /* copy 16k at a time */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
8dd59c49fc0406c986dcb887651133d9978f2249noodl/* context needed to identify a resource */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodlstruct dav_resource_private {
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl pool *pool; /* memory storage pool associated with request */
8dd59c49fc0406c986dcb887651133d9978f2249noodl const char *pathname; /* full pathname to resource */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl struct stat finfo; /* filesystem info */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl};
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/* private context for doing a filesystem walk */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodltypedef struct {
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_walker_ctx *wctx;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_resource res1;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_resource res2;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_resource_private info1;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_resource_private info2;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_buffer path1;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_buffer path2;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl dav_buffer locknull_buf;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl} dav_fs_walker_context;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/* pull this in from the other source file */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodlextern const dav_hooks_locks dav_hooks_locks_fs;
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl/* forward-declare this sucker */
ecc5150d35c0dc5ee5119c2717e6660fa331abbftakashistatic const dav_hooks_repository dav_hooks_repository_fs;
f086b4b402fa9a2fefc7dda85de2a3cc1cd0a654rjung
727872d18412fc021f03969b8641810d8896820bhumbedooh/*
0d0ba3a410038e179b695446bb149cce6264e0abnd** The Provider ID is used to differentiate "logical" providers that use
727872d18412fc021f03969b8641810d8896820bhumbedooh** the same set of hook functions. Essentially, the ID is an instance
cc7e1025de9ac63bd4db6fe7f71c158b2cf09fe4humbedooh** handle and the hooks are a vtable.
0d0ba3a410038e179b695446bb149cce6264e0abnd**
cc7e1025de9ac63bd4db6fe7f71c158b2cf09fe4humbedooh** In this module, we only have a single provider for each type, so we
727872d18412fc021f03969b8641810d8896820bhumbedooh** actually ignore the Provider ID.
0d0ba3a410038e179b695446bb149cce6264e0abnd*/
0d0ba3a410038e179b695446bb149cce6264e0abnd#define DAV_FS_PROVIDER_ID 0
0d0ba3a410038e179b695446bb149cce6264e0abnd
ac082aefa89416cbdc9a1836eaf3bed9698201c8humbedooh/*
0d0ba3a410038e179b695446bb149cce6264e0abnd** The namespace URIs that we use. This list and the enumeration must
0d0ba3a410038e179b695446bb149cce6264e0abnd** stay in sync.
0d0ba3a410038e179b695446bb149cce6264e0abnd*/
727872d18412fc021f03969b8641810d8896820bhumbedoohstatic const char * const dav_fs_namespace_uris[] =
0d0ba3a410038e179b695446bb149cce6264e0abnd{
0d0ba3a410038e179b695446bb149cce6264e0abnd "DAV:",
30471a4650391f57975f60bbb6e4a90be7b284bfhumbedooh "http://apache.org/dav/props/",
205f749042ed530040a4f0080dbcb47ceae8a374rjung
af33a4994ae2ff15bc67d19ff1a7feb906745bf8rbowen NULL /* sentinel */
0d0ba3a410038e179b695446bb149cce6264e0abnd};
7fec19672a491661b2fe4b29f685bc7f4efa64d4ndenum {
7fec19672a491661b2fe4b29f685bc7f4efa64d4nd DAV_FS_URI_DAV, /* the DAV: namespace URI */
7fec19672a491661b2fe4b29f685bc7f4efa64d4nd DAV_FS_URI_MYPROPS /* the namespace URI for our custom props */
f02c4cd65aabbf1c9076b8bae71a267589d80c41noodl};
/*
** The properties that we define.
*/
enum {
/* using DAV_FS_URI_DAV */
DAV_PROPID_FS_creationdate = DAV_PROPID_FS,
DAV_PROPID_FS_displayname,
DAV_PROPID_FS_getcontentlength,
DAV_PROPID_FS_getetag,
DAV_PROPID_FS_getlastmodified,
DAV_PROPID_FS_source,
/* using DAV_FS_URI_MYPROPS */
DAV_PROPID_FS_executable
};
/* NOTE: the magic "200" is derived from the ranges in mod_dav.h */
#define DAV_PROPID_FS_OURS(id) (DAV_PROPID_FS <= (id) && \
(id) < DAV_PROPID_FS + 200)
typedef struct {
int ns;
const char * name;
int propid;
} dav_fs_liveprop_name;
static const dav_fs_liveprop_name dav_fs_props[] =
{
{ DAV_FS_URI_DAV, "creationdate", DAV_PROPID_FS_creationdate },
{ DAV_FS_URI_DAV, "getcontentlength", DAV_PROPID_FS_getcontentlength },
{ DAV_FS_URI_DAV, "getetag", DAV_PROPID_FS_getetag },
{ DAV_FS_URI_DAV, "getlastmodified", DAV_PROPID_FS_getlastmodified },
{ DAV_FS_URI_MYPROPS, "executable", DAV_PROPID_FS_executable },
/* ### these aren't FS specific */
{ DAV_FS_URI_DAV, "displayname", DAV_PROPID_FS_displayname },
{ DAV_FS_URI_DAV, "source", DAV_PROPID_FS_source },
{ 0 } /* sentinel */
};
/* define the dav_stream structure for our use */
struct dav_stream {
pool *p;
int fd;
const char *pathname; /* we may need to remove it at close time */
};
/* forward declaration for internal treewalkers */
static dav_error * dav_fs_walk(dav_walker_ctx *wctx, int depth);
/* --------------------------------------------------------------------
**
** PRIVATE REPOSITORY FUNCTIONS
*/
pool *dav_fs_pool(const dav_resource *resource)
{
return resource->info->pool;
}
const char *dav_fs_pathname(const dav_resource *resource)
{
return resource->info->pathname;
}
void 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 {
char *dirpath = ap_make_dirstr_parent(ctx->pool, ctx->pathname);
size_t dirlen = strlen(dirpath);
if (fname_p != NULL)
*fname_p = ctx->pathname + dirlen;
*dirpath_p = dirpath;
/* remove trailing slash from dirpath, unless it's the root dir */
/* ### Win32 check */
if (dirlen > 1 && dirpath[dirlen - 1] == '/') {
dirpath[dirlen - 1] = '\0';
}
}
}
/* 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, time_t sec, char *buf)
{
struct tm *tms;
tms = gmtime(&sec);
if (style == DAV_STYLE_ISO8601) {
/* ### should we use "-00:00" instead of "Z" ?? */
/* 20 chars plus null term */
sprintf(buf, "%.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 */
sprintf(buf,
"%s, %.2d %s %d %.2d:%.2d:%.2d GMT",
ap_day_snames[tms->tm_wday],
tms->tm_mday, ap_month_snames[tms->tm_mon],
tms->tm_year + 1900,
tms->tm_hour, tms->tm_min, tms->tm_sec);
}
static int dav_sync_write(int fd, const char *buf, ssize_t bufsize)
{
ssize_t amt;
do {
amt = write(fd, buf, bufsize);
if (amt > 0) {
bufsize -= amt;
buf += amt;
}
} while (amt > 0 && bufsize > 0);
return amt < 0 ? -1 : 0;
}
static dav_error * dav_fs_copymove_file(
int is_move,
pool * p,
const char *src,
const char *dst,
dav_buffer *pbuf)
{
dav_buffer work_buf = { 0 };
int fdi;
int fdo;
if (pbuf == NULL)
pbuf = &work_buf;
dav_set_bufsize(p, pbuf, DAV_FS_COPY_BLOCKSIZE);
if ((fdi = open(src, O_RDONLY | O_BINARY)) == -1) {
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not open file for reading");
}
/* ### do we need to deal with the umask? */
if ((fdo = open(dst, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
DAV_FS_MODE_FILE)) == -1) {
close(fdi);
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not open file for writing");
}
while (1) {
ssize_t len = read(fdi, pbuf->buf, DAV_FS_COPY_BLOCKSIZE);
if (len == -1) {
close(fdi);
close(fdo);
if (remove(dst) != 0) {
/* ### ACK! Inconsistent state... */
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"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,
"Could not read input file");
}
if (len == 0)
break;
if (dav_sync_write(fdo, pbuf->buf, len) != 0) {
int save_errno = errno;
close(fdi);
close(fdo);
if (remove(dst) != 0) {
/* ### ACK! Inconsistent state... */
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not delete output after write "
"failure. Server is now in an "
"inconsistent state.");
}
if (save_errno == ENOSPC) {
return dav_new_error(p, HTTP_INSUFFICIENT_STORAGE, 0,
"There is not enough storage to write to "
"this resource.");
}
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not write output file");
}
}
close(fdi);
close(fdo);
if (is_move && remove(src) != 0) {
dav_error *err;
int save_errno = errno; /* save the errno that got us here */
if (remove(dst) != 0) {
/* ### ACK. this creates an inconsistency. do more!? */
/* ### use something besides 500? */
/* Note that we use the latest errno */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"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,
"Could not remove source file after move. "
"Destination was removed to ensure consistency.");
err->save_errno = save_errno;
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,
pool * p,
const char *src_dir, const char *src_file,
const char *dst_dir, const char *dst_file,
dav_buffer *pbuf)
{
struct stat src_finfo; /* finfo for source file */
struct stat dst_state_finfo; /* finfo for STATE directory */
const char *src;
const char *dst;
/* build the propset pathname for the source file */
src = ap_pstrcat(p, src_dir, "/" DAV_FS_STATE_DIR "/", src_file, NULL);
/* the source file doesn't exist */
if (stat(src, &src_finfo) != 0) {
return NULL;
}
/* build the pathname for the destination state dir */
dst = ap_pstrcat(p, dst_dir, "/" DAV_FS_STATE_DIR, NULL);
/* ### do we need to deal with the umask? */
/* ensure that it exists */
if (mkdir(dst, DAV_FS_MODE_DIR) != 0) {
if (errno != EEXIST) {
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not create internal state directory");
}
}
/* get info about the state directory */
if (stat(dst, &dst_state_finfo) != 0) {
/* Ack! Where'd it go? */
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"State directory disappeared");
}
/* The mkdir() may have failed because a *file* exists there already */
if (!S_ISDIR(dst_state_finfo.st_mode)) {
/* ### try to recover by deleting this file? (and mkdir again) */
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"State directory is actually a file");
}
/* append the target file to the state directory pathname */
dst = ap_pstrcat(p, dst, "/", dst_file, NULL);
/* copy/move the file now */
if (is_move && src_finfo.st_dev == dst_state_finfo.st_dev) {
/* simple rename is possible since it is on the same device */
if (rename(src, dst) != 0) {
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not move state file.");
}
}
else {
/* gotta copy (and delete) */
return dav_fs_copymove_file(is_move, p, src, dst, pbuf);
}
return NULL;
}
static dav_error *dav_fs_copymoveset(int is_move, pool *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 */
dav_fs_dir_file_name(src, &src_dir, &src_file);
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,
"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(pool *p, const dav_resource *resource)
{
const char *dirpath;
const char *fname;
const char *state1;
const char *state2;
const char *pathname;
/* Get directory, filename, and state-file names for the resource */
dav_fs_dir_file_name(resource, &dirpath, &fname);
dav_dbm_get_statefiles(p, fname, &state1, &state2);
/* build the propset pathname for the file */
pathname = ap_pstrcat(p,
dirpath,
"/" DAV_FS_STATE_DIR "/",
state1,
NULL);
/* note: we may get ENOENT if the state dir is not present */
if (remove(pathname) != 0 && errno != ENOENT) {
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not remove properties.");
}
if (state2 != NULL) {
/* build the propset pathname for the file */
pathname = ap_pstrcat(p,
dirpath,
"/" DAV_FS_STATE_DIR "/",
state2,
NULL);
if (remove(pathname) != 0 && errno != ENOENT) {
/* ### CRAP. only removed half. */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not fully remove properties. "
"The server is now in an inconsistent "
"state.");
}
}
return NULL;
}
/* --------------------------------------------------------------------
**
** REPOSITORY HOOK FUNCTIONS
*/
static dav_resource * dav_fs_get_resource(
request_rec *r,
const char *root_dir,
const char *workspace)
{
dav_resource_private *ctx;
dav_resource *resource;
char *s;
char *filename;
size_t len;
/* ### optimize this into a single allocation! */
/* Create private resource context descriptor */
ctx = ap_pcalloc(r->pool, sizeof(*ctx));
ctx->pool = r->pool;
ctx->finfo = r->finfo;
/* Preserve case on OSes which fold canonical filenames */
#if MODULE_MAGIC_NUMBER_MAJOR > 19990320 || (MODULE_MAGIC_NUMBER_MAJOR == 19990320 && MODULE_MAGIC_NUMBER_MINOR >= 8)
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 = ap_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 = ap_pcalloc(r->pool, sizeof(*resource));
resource->type = DAV_RESOURCE_TYPE_REGULAR;
resource->info = ctx;
resource->hooks = &dav_hooks_repository_fs;
/* make sure the URI does not have a trailing "/" */
len = strlen(r->uri);
if (len > 1 && r->uri[len - 1] == '/') {
s = ap_pstrdup(r->pool, r->uri);
s[len - 1] = '\0';
resource->uri = s;
}
else {
resource->uri = r->uri;
}
if (r->finfo.st_mode != 0) {
resource->exists = 1;
resource->collection = S_ISDIR(r->finfo.st_mode);
/* 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 NULL; /* becomes HTTP_NOT_FOUND */
}
/* retain proper integrity across the structures */
if (!resource->exists) {
ctx->finfo.st_mode = 0;
}
}
}
return resource;
}
static dav_resource * dav_fs_get_parent_resource(const dav_resource *resource)
{
dav_resource_private *ctx = resource->info;
dav_resource_private *parent_ctx;
dav_resource *parent_resource;
char *dirpath;
/* If given resource is root, then there is no parent */
if (strcmp(resource->uri, "/") == 0 ||
#ifdef WIN32
(strlen(ctx->pathname) == 3 && ctx->pathname[1] == ':' && ctx->pathname[2] == '/')
#else
strcmp(ctx->pathname, "/") == 0
#endif
)
return NULL;
/* ### optimize this into a single allocation! */
/* Create private resource context descriptor */
parent_ctx = ap_pcalloc(ctx->pool, sizeof(*parent_ctx));
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 = ap_pcalloc(ctx->pool, sizeof(*parent_resource));
parent_resource->info = parent_ctx;
parent_resource->collection = 1;
parent_resource->hooks = &dav_hooks_repository_fs;
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;
}
if (stat(parent_ctx->pathname, &parent_ctx->finfo) == 0) {
parent_resource->exists = 1;
}
return parent_resource;
}
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;
#ifdef WIN32
return stricmp(ctx1->pathname, ctx2->pathname) == 0;
#else
if (ctx1->finfo.st_mode != 0)
return ctx1->finfo.st_ino == ctx2->finfo.st_ino;
else
return strcmp(ctx1->pathname, ctx2->pathname) == 0;
#endif
}
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;
size_t len1 = strlen(ctx1->pathname);
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 dav_error * dav_fs_open_stream(const dav_resource *resource,
dav_stream_mode mode,
dav_stream **stream)
{
pool *p = resource->info->pool;
dav_stream *ds = ap_palloc(p, sizeof(*ds));
int flags;
switch (mode) {
case DAV_MODE_READ:
case DAV_MODE_READ_SEEKABLE:
default:
flags = O_RDONLY;
break;
case DAV_MODE_WRITE_TRUNC:
flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY;
break;
case DAV_MODE_WRITE_SEEKABLE:
flags = O_WRONLY | O_CREAT | O_BINARY;
break;
}
ds->p = p;
ds->pathname = resource->info->pathname;
ds->fd = open(ds->pathname, flags, DAV_FS_MODE_FILE);
if (ds->fd == -1) {
/* ### use something besides 500? */
return dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, 0,
"An error occurred while opening a resource.");
}
ap_note_cleanups_for_fd(p, ds->fd);
*stream = ds;
return NULL;
}
static dav_error * dav_fs_close_stream(dav_stream *stream, int commit)
{
ap_kill_cleanups_for_fd(stream->p, stream->fd);
close(stream->fd);
if (!commit) {
if (remove(stream->pathname) != 0) {
/* ### use a better description? */
return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0,
"There was a problem removing (rolling "
"back) the resource "
"when it was being closed.");
}
}
return NULL;
}
static dav_error * dav_fs_read_stream(dav_stream *stream,
void *buf, size_t *bufsize)
{
ssize_t amt;
amt = read(stream->fd, buf, *bufsize);
if (amt == -1) {
/* ### use something besides 500? */
return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0,
"An error occurred while reading from a "
"resource.");
}
*bufsize = (size_t)amt;
return NULL;
}
static dav_error * dav_fs_write_stream(dav_stream *stream,
const void *buf, size_t bufsize)
{
if (dav_sync_write(stream->fd, buf, bufsize) != 0) {
if (errno == ENOSPC) {
return dav_new_error(stream->p, HTTP_INSUFFICIENT_STORAGE, 0,
"There is not enough storage to write to "
"this resource.");
}
/* ### use something besides 500? */
return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0,
"An error occurred while writing to a "
"resource.");
}
return NULL;
}
static dav_error * dav_fs_seek_stream(dav_stream *stream, off_t abs_pos)
{
if (lseek(stream->fd, abs_pos, SEEK_SET) == (off_t)-1) {
/* ### use something besides 500? */
return dav_new_error(stream->p, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not seek to specified position in the "
"resource.");
}
return NULL;
}
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 DEBUG_GET_HANDLER
if (!resource->exists)
return NULL;
/* make sure the proper mtime is in the request record */
ap_update_mtime(r, resource->info->finfo.st_mtime);
/* ### note that these use r->filename rather than <resource> */
ap_set_last_modified(r);
ap_set_etag(r);
/* we accept byte-ranges */
ap_table_setn(r->headers_out, "Accept-Ranges", "bytes");
/* set up the Content-Length header */
ap_set_content_length(r, resource->info->finfo.st_size);
/* ### how to set the content type? */
/* ### until this is resolved, the Content-Type header is busted */
#endif
return NULL;
}
#if DEBUG_PATHNAME_STYLE
static const char * dav_fs_get_pathname(
const dav_resource *resource,
void **free_handle_p)
{
return resource->info->pathname;
}
#endif
static void dav_fs_free_file(void *free_handle)
{
/* nothing to free ... */
}
static dav_error * dav_fs_create_collection(pool *p, dav_resource *resource)
{
dav_resource_private *ctx = resource->info;
if (mkdir(ctx->pathname, DAV_FS_MODE_DIR) != 0) {
if (errno == ENOSPC)
return dav_new_error(p, HTTP_INSUFFICIENT_STORAGE, 0,
"There is not enough storage to create "
"this collection.");
/* ### refine this error message? */
return dav_new_error(p, HTTP_FORBIDDEN, 0,
"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_walker_ctx *ctx, int calltype)
{
dav_resource_private *srcinfo = ctx->resource->info;
dav_resource_private *dstinfo = ctx->res2->info;
dav_error *err = NULL;
if (ctx->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) rmdir(srcinfo->pathname);
}
else {
/* copy/move of a collection. Create the new, target collection */
if (mkdir(dstinfo->pathname, DAV_FS_MODE_DIR) != 0) {
/* ### assume it was a permissions problem */
/* ### need a description here */
err = dav_new_error(ctx->pool, HTTP_FORBIDDEN, 0, NULL);
}
}
}
else {
err = dav_fs_copymove_file(ctx->is_move, ctx->pool, srcinfo->pathname,
dstinfo->pathname, &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(ctx->resource, ctx->root))) {
/* ### use errno to generate DAV:responsedescription? */
dav_add_response(ctx, ctx->resource->uri, 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_walker_ctx ctx = { 0 };
ctx.walk_type = DAV_WALKTYPE_ALL | DAV_WALKTYPE_HIDDEN;
ctx.func = dav_fs_copymove_walker;
ctx.pool = src->info->pool;
ctx.resource = src;
ctx.res2 = dst;
ctx.is_move = is_move;
ctx.postfix = is_move; /* needed for MOVE to delete source dirs */
/* copy over the source URI */
dav_buffer_init(ctx.pool, &ctx.uri, src->uri);
if ((err = dav_fs_walk(&ctx, depth)) != NULL) {
/* on a "real" error, then just punt. nothing else to do. */
return err;
}
if ((*response = ctx.response) != NULL) {
/* some multistatus responses exist. wrap them in a 207 */
return dav_new_error(src->info->pool, HTTP_MULTI_STATUS, 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,
&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,
"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;
int can_rename = 0;
#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,
"DESIGN ERROR: a mix of repositories "
"was passed to move_resource.");
}
#endif
/* determine whether a simple rename will work.
* Assume source exists, else we wouldn't get called.
*/
if (dstinfo->finfo.st_mode != 0) {
if (dstinfo->finfo.st_dev == srcinfo->finfo.st_dev) {
/* target exists and is on the same device. */
can_rename = 1;
}
}
else {
const char *dirpath;
struct stat finfo;
/* destination does not exist, but the parent directory should,
* so try it
*/
dirpath = ap_make_dirstr_parent(dstinfo->pool, dstinfo->pathname);
if (stat(dirpath, &finfo) == 0
&& finfo.st_dev == srcinfo->finfo.st_dev) {
can_rename = 1;
}
}
/* if we can't simply renamed, then do it the hard way... */
if (!can_rename) {
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;
}
/* a rename should work. do it, and move properties as well */
/* no multistatus response */
*response = NULL;
if (rename(srcinfo->pathname, dstinfo->pathname) != 0) {
/* ### should have a better error than this. */
return dav_new_error(srcinfo->pool, HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not rename resource.");
}
/* update resource states */
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 (rename(dstinfo->pathname, srcinfo->pathname) != 0) {
/* 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_walker_ctx *ctx, int calltype)
{
dav_resource_private *info = ctx->resource->info;
/* do not attempt to remove a null resource,
* or a collection with children
*/
if (ctx->resource->exists &&
(!ctx->resource->collection || calltype == DAV_CALLTYPE_POSTFIX)) {
/* try to remove the resource */
int result;
result = ctx->resource->collection
? rmdir(info->pathname)
: remove(info->pathname);
/*
** 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 != 0) {
/* ### assume there is a permissions problem */
/* ### use errno to generate DAV:responsedescription? */
dav_add_response(ctx, ctx->resource->uri, HTTP_FORBIDDEN, NULL);
}
}
return NULL;
}
static dav_error * dav_fs_remove_resource(dav_resource *resource,
dav_response **response)
{
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_walker_ctx ctx = { 0 };
dav_error *err = NULL;
ctx.walk_type = DAV_WALKTYPE_ALL | DAV_WALKTYPE_HIDDEN;
ctx.postfix = 1;
ctx.func = dav_fs_delete_walker;
ctx.pool = info->pool;
ctx.resource = resource;
dav_buffer_init(info->pool, &ctx.uri, resource->uri);
if ((err = dav_fs_walk(&ctx, DAV_INFINITY)) != NULL) {
/* on a "real" error, then just punt. nothing else to do. */
return err;
}
if ((*response = ctx.response) != NULL) {
/* some multistatus responses exist. wrap them in a 207 */
return dav_new_error(info->pool, HTTP_MULTI_STATUS, 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 (remove(info->pathname) != 0) {
/* ### put a description in here */
return dav_new_error(info->pool, HTTP_FORBIDDEN, 0, 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. */
dav_error * dav_fs_walker(dav_fs_walker_context *fsctx, int depth)
{
dav_error *err = NULL;
dav_walker_ctx *wctx = fsctx->wctx;
int isdir = wctx->resource->collection;
DIR *dirp;
struct dirent *ep;
/* ensure the context is prepared properly, then call the func */
err = (*wctx->func)(wctx,
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(wctx->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(wctx->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 ((dirp = opendir(fsctx->path1.buf)) == NULL) {
/* ### need a better error */
return dav_new_error(wctx->pool, HTTP_NOT_FOUND, 0, NULL);
}
while ((ep = readdir(dirp)) != NULL) {
size_t len = strlen(ep->d_name);
/* avoid recursing into our current, parent, or state directories */
if (ep->d_name[0] == '.'
&& (len == 1 || (ep->d_name[1] == '.' && len == 2))) {
continue;
}
if (wctx->walk_type & DAV_WALKTYPE_AUTH) {
/* ### need to authorize each file */
/* ### example: .htaccess is normally configured to fail auth */
/* stuff in the state directory is never authorized! */
if (!strcmp(ep->d_name, DAV_FS_STATE_DIR)) {
continue;
}
}
/* skip the state dir unless a HIDDEN is performed */
if (!(wctx->walk_type & DAV_WALKTYPE_HIDDEN)
&& !strcmp(ep->d_name, DAV_FS_STATE_DIR)) {
continue;
}
/* append this file onto the path buffer (copy null term) */
dav_buffer_place_mem(wctx->pool,
&fsctx->path1, ep->d_name, len + 1, 0);
if (lstat(fsctx->path1.buf, &fsctx->info1.finfo) != 0) {
/* woah! where'd it go? */
/* ### should have a better error here */
err = dav_new_error(wctx->pool, HTTP_NOT_FOUND, 0, 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(wctx->pool, &wctx->uri, ep->d_name, len + 1, 1);
/* if there is a secondary path, then do that, too */
if (fsctx->path2.buf != NULL) {
dav_buffer_place_mem(wctx->pool, &fsctx->path2,
ep->d_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 = wctx->uri.buf;
/* ### for now, only process regular files (e.g. skip symlinks) */
if (S_ISREG(fsctx->info1.finfo.st_mode)) {
/* call the function for the specified dir + file */
if ((err = (*wctx->func)(wctx, DAV_CALLTYPE_MEMBER)) != NULL) {
/* ### maybe add a higher-level description? */
break;
}
}
else if (S_ISDIR(fsctx->info1.finfo.st_mode)) {
size_t save_path_len = fsctx->path1.cur_len;
size_t save_uri_len = wctx->uri.cur_len;
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 */
wctx->uri.cur_len += len + 1;
wctx->uri.buf[wctx->uri.cur_len - 1] = '/';
wctx->uri.buf[wctx->uri.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;
wctx->uri.cur_len = save_uri_len;
fsctx->res1.collection = 0;
fsctx->res2.collection = 0;
/* assert: res1.exists == 1 */
}
}
/* ### check the return value of this? */
closedir(dirp);
if (err != NULL)
return err;
if (wctx->walk_type & DAV_WALKTYPE_LOCKNULL) {
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) {
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(wctx->pool, &fsctx->path1,
fsctx->locknull_buf.buf + offset, len + 1, 0);
dav_buffer_place_mem(wctx->pool, &wctx->uri,
fsctx->locknull_buf.buf + offset, len + 1, 0);
if (fsctx->path2.buf != NULL) {
dav_buffer_place_mem(wctx->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 = wctx->uri.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(wctx->lockdb, wctx->resource, &locks)) != NULL) {
/* ### maybe add a higher-level description? */
return err;
}
/* call the function for the specified dir + file */
if (locks != NULL &&
(err = (*wctx->func)(wctx, DAV_CALLTYPE_LOCKNULL)) != NULL) {
/* ### maybe add a higher-level description? */
return err;
}
offset += len + 1;
}
/* reset the exists flag */
fsctx->res1.exists = 1;
}
if (wctx->postfix) {
/* replace the dirs' trailing slashes with null terms */
fsctx->path1.buf[--fsctx->path1.cur_len] = '\0';
wctx->uri.buf[--wctx->uri.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 (*wctx->func)(wctx, DAV_CALLTYPE_POSTFIX);
}
return NULL;
}
static dav_error * dav_fs_walk(dav_walker_ctx *wctx, int depth)
{
dav_fs_walker_context fsctx = { 0 };
#if DAV_DEBUG
if ((wctx->walk_type & DAV_WALKTYPE_LOCKNULL) != 0
&& wctx->lockdb == NULL) {
return dav_new_error(wctx->pool, HTTP_INTERNAL_SERVER_ERROR, 0,
"DESIGN ERROR: walker called to walk locknull "
"resources, but a lockdb was not provided.");
}
/* ### an assertion that we have space for a trailing slash */
if (wctx->uri.cur_len + 1 > wctx->uri.alloc_len) {
return dav_new_error(wctx->pool, HTTP_INTERNAL_SERVER_ERROR, 0,
"DESIGN ERROR: walker should have been called "
"with padding in the URI buffer.");
}
#endif
fsctx.wctx = wctx;
wctx->root = wctx->resource;
/* ### zero out versioned, working, baselined? */
fsctx.res1 = *wctx->resource;
fsctx.res1.info = &fsctx.info1;
fsctx.info1 = *wctx->resource->info;
dav_buffer_init(wctx->pool, &fsctx.path1, fsctx.info1.pathname);
fsctx.info1.pathname = fsctx.path1.buf;
if (wctx->res2 != NULL) {
fsctx.res2 = *wctx->res2;
fsctx.res2.exists = 0;
fsctx.res2.collection = 0;
fsctx.res2.info = &fsctx.info2;
fsctx.info2 = *wctx->res2->info;
/* res2 does not exist -- clear its finfo structure */
memset(&fsctx.info2.finfo, 0, sizeof(fsctx.info2.finfo));
dav_buffer_init(wctx->pool, &fsctx.path2, fsctx.info2.pathname);
fsctx.info2.pathname = fsctx.path2.buf;
}
/* if we have a directory, then ensure the URI has a trailing "/" */
if (fsctx.res1.collection
&& wctx->uri.buf[wctx->uri.cur_len - 1] != '/') {
/* this will fall into the pad area */
wctx->uri.buf[wctx->uri.cur_len++] = '/';
wctx->uri.buf[wctx->uri.cur_len] = '\0';
}
/*
** URI is tracked in the walker context. Ensure that people do not try
** to fetch it from res2. We will ensure that res1 and uri will remain
** synchronized.
*/
fsctx.res1.uri = wctx->uri.buf;
fsctx.res2.uri = NULL;
/* use our resource structures */
wctx->resource = &fsctx.res1;
wctx->res2 = &fsctx.res2;
return dav_fs_walker(&fsctx, depth);
}
/* 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;
if (!resource->exists)
return ap_pstrdup(ctx->pool, "");
if (ctx->finfo.st_mode != 0) {
return ap_psprintf(ctx->pool, "\"%lx-%lx-%lx\"",
(unsigned long) ctx->finfo.st_ino,
(unsigned long) ctx->finfo.st_size,
(unsigned long) ctx->finfo.st_mtime);
}
return ap_psprintf(ctx->pool, "\"%lx\"", (unsigned long) ctx->finfo.st_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_read_stream,
dav_fs_write_stream,
dav_fs_seek_stream,
dav_fs_set_headers,
#if DEBUG_PATHNAME_STYLE
dav_fs_get_pathname,
#else
0,
#endif
dav_fs_free_file,
dav_fs_create_collection,
dav_fs_copy_resource,
dav_fs_move_resource,
dav_fs_remove_resource,
dav_fs_walk,
dav_fs_getetag,
};
static int dav_fs_find_prop(const char *ns_uri, const char *name)
{
const dav_fs_liveprop_name *scan;
int ns;
if (*ns_uri == 'h'
&& strcmp(ns_uri, dav_fs_namespace_uris[DAV_FS_URI_MYPROPS]) == 0) {
ns = DAV_FS_URI_MYPROPS;
}
else if (*ns_uri == 'D' && strcmp(ns_uri, "DAV:") == 0) {
ns = DAV_FS_URI_DAV;
}
else {
/* we don't define this property */
return 0;
}
for (scan = dav_fs_props; scan->name != NULL; ++scan)
if (ns == scan->ns && strcmp(name, scan->name) == 0)
return scan->propid;
return 0;
}
static dav_prop_insert dav_fs_insert_prop(const dav_resource *resource,
int propid, int insvalue,
const int *ns_map,
dav_text_header *phdr)
{
const char *value;
const char *s;
dav_prop_insert which;
pool *p = resource->info->pool;
const dav_fs_liveprop_name *scan;
int 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];
if (!DAV_PROPID_FS_OURS(propid))
return DAV_PROP_INSERT_NOTME;
/*
** None of FS provider properties are defined if the resource does not
** exist. Just bail for this case.
**
** Note that DAV:displayname and DAV:source will be stored as dead
** properties; the NOTDEF return code indicates that dav_props.c should
** look there for the value.
**
** 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_FS_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.st_ctime,
buf);
value = buf;
break;
case DAV_PROPID_FS_getcontentlength:
/* our property, but not defined on collection resources */
if (resource->collection)
return DAV_PROP_INSERT_NOTDEF;
(void) sprintf(buf, "%ld", resource->info->finfo.st_size);
value = buf;
break;
case DAV_PROPID_FS_getetag:
value = dav_fs_getetag(resource);
break;
case DAV_PROPID_FS_getlastmodified:
dav_format_time(DAV_STYLE_RFC822,
resource->info->finfo.st_mtime,
buf);
value = buf;
break;
case DAV_PROPID_FS_executable:
#ifdef WIN32
/* our property, but not defined on the Win32 platform */
return DAV_PROP_INSERT_NOTDEF;
#else
/* our property, but not defined on collection resources */
if (resource->collection)
return DAV_PROP_INSERT_NOTDEF;
/* the files are "ours" so we only need to check owner exec privs */
if (resource->info->finfo.st_mode & DAV_FS_MODE_XUSR)
value = "T";
else
value = "F";
break;
#endif /* WIN32 */
case DAV_PROPID_FS_displayname:
case DAV_PROPID_FS_source:
default:
/*
** This property is not defined. However, it may be a dead
** property.
*/
return DAV_PROP_INSERT_NOTDEF;
}
/* assert: value != NULL */
for (scan = dav_fs_props; scan->name != NULL; ++scan)
if (scan->propid == propid)
break;
/* assert: scan->name != NULL */
/* map our NS index into a global NS index */
ns = ns_map[scan->ns];
/* DBG3("FS: inserting lp%d:%s (local %d)", ns, scan->name, scan->ns); */
if (insvalue) {
/* use D: prefix to refer to the DAV: namespace URI */
s = ap_psprintf(p, "<lp%d:%s>%s</lp%d:%s>" DEBUG_CR,
ns, scan->name, value, ns, scan->name);
which = DAV_PROP_INSERT_VALUE;
}
else {
/* use D: prefix to refer to the DAV: namespace URI */
s = ap_psprintf(p, "<lp%d:%s/>" DEBUG_CR, ns, scan->name);
which = DAV_PROP_INSERT_NAME;
}
dav_text_append(p, phdr, s);
/* we inserted a name or value (this prop is done) */
return which;
}
static void dav_fs_insert_all(const dav_resource *resource, int insvalue,
const int *ns_map, dav_text_header *phdr)
{
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_FS_creationdate,
insvalue, ns_map, phdr);
(void) dav_fs_insert_prop(resource, DAV_PROPID_FS_getcontentlength,
insvalue, ns_map, phdr);
(void) dav_fs_insert_prop(resource, DAV_PROPID_FS_getlastmodified,
insvalue, ns_map, phdr);
(void) dav_fs_insert_prop(resource, DAV_PROPID_FS_getetag,
insvalue, ns_map, phdr);
#ifndef WIN32
/*
** Note: this property is not defined on the Win32 platform.
** dav_fs_insert_prop() won't insert it, but we may as
** well not even call it.
*/
(void) dav_fs_insert_prop(resource, DAV_PROPID_FS_executable,
insvalue, ns_map, phdr);
#endif
/* ### we know the others aren't defined as liveprops */
}
static dav_prop_rw dav_fs_is_writeable(const dav_resource *resource,
int propid)
{
if (!DAV_PROPID_FS_OURS(propid))
return DAV_PROP_RW_NOTME;
if (propid == DAV_PROPID_FS_displayname
|| propid == DAV_PROPID_FS_source
#ifndef WIN32
/* this property is not usable (writeable) on the Win32 platform */
|| (propid == DAV_PROPID_FS_executable && !resource->collection)
#endif
)
return DAV_PROP_RW_YES;
return DAV_PROP_RW_NO;
}
static dav_error *dav_fs_patch_validate(const dav_resource *resource,
const dav_xml_elem *elem,
int operation,
void **context,
int *defer_to_dead)
{
const dav_text *cdata;
const dav_text *f_cdata;
char value;
if (elem->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,
"The 'executable' property cannot be removed.");
}
cdata = elem->first_cdata.first;
f_cdata = elem->last_child == NULL
? NULL
: elem->last_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,
"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,
"The 'executable' property expects a single "
"character, valued 'T' or 'F'. The value "
"submitted is invalid.");
}
*context = (void *)(value == 'T');
return NULL;
too_long:
return dav_new_error(resource->info->pool, HTTP_CONFLICT, 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(dav_resource *resource,
const dav_xml_elem *elem,
int operation,
void *context,
dav_liveprop_rollback **rollback_ctx)
{
int value = context != NULL;
mode_t mode = resource->info->finfo.st_mode;
int old_value = (resource->info->finfo.st_mode & DAV_FS_MODE_XUSR) != 0;
/* assert: prop == executable. operation == SET. */
/* don't do anything if there is no change. no rollback info either. */
if (value == old_value)
return NULL;
mode &= ~DAV_FS_MODE_XUSR;
if (value)
mode |= DAV_FS_MODE_XUSR;
if (chmod(resource->info->pathname, mode) == -1) {
return dav_new_error(resource->info->pool,
HTTP_INTERNAL_SERVER_ERROR, 0,
"Could not set the executable flag of the "
"target resource.");
}
/* update the resource and set up the rollback context */
resource->info->finfo.st_mode = mode;
*rollback_ctx = (dav_liveprop_rollback *)old_value;
return NULL;
}
static void dav_fs_patch_commit(dav_resource *resource,
int operation,
void *context,
dav_liveprop_rollback *rollback_ctx)
{
/* nothing to do */
}
static dav_error *dav_fs_patch_rollback(dav_resource *resource,
int operation,
void *context,
dav_liveprop_rollback *rollback_ctx)
{
mode_t mode = resource->info->finfo.st_mode & ~DAV_FS_MODE_XUSR;
int value = rollback_ctx != NULL;
/* assert: prop == executable. operation == SET. */
/* restore the executable bit */
if (value)
mode |= DAV_FS_MODE_XUSR;
if (chmod(resource->info->pathname, mode) == -1) {
return dav_new_error(resource->info->pool,
HTTP_INTERNAL_SERVER_ERROR, 0,
"After a failure occurred, the resource's "
"executable flag could not be restored.");
}
/* restore the resource's state */
resource->info->finfo.st_mode = mode;
return NULL;
}
static const dav_hooks_liveprop dav_hooks_liveprop_fs =
{
#ifdef WIN32
NULL,
#else
"http://apache.org/dav/propset/fs/1", /* filesystem, set 1 */
#endif
dav_fs_find_prop,
dav_fs_insert_prop,
dav_fs_insert_all,
dav_fs_is_writeable,
dav_fs_namespace_uris,
dav_fs_patch_validate,
dav_fs_patch_exec,
dav_fs_patch_commit,
dav_fs_patch_rollback,
};
/*
** Note: we do not provide an is_active function at this point. In the
** future, mod_dav may use that to determine if a particular provider is
** active/enabled, but it doesn't now.
*/
static const dav_dyn_provider dav_dyn_providers_fs[] =
{
/* repository provider */
{
DAV_FS_PROVIDER_ID,
DAV_DYN_TYPE_REPOSITORY,
&dav_hooks_repository_fs,
NULL
},
/* liveprop provider */
{
DAV_FS_PROVIDER_ID,
DAV_DYN_TYPE_LIVEPROP,
&dav_hooks_liveprop_fs,
NULL
},
/* propdb provider */
{
DAV_FS_PROVIDER_ID,
DAV_DYN_TYPE_PROPDB,
&dav_hooks_db_dbm,
NULL
},
/* locks provider */
{
DAV_FS_PROVIDER_ID,
DAV_DYN_TYPE_LOCKS,
&dav_hooks_locks_fs,
NULL
},
/* must always be last */
DAV_DYN_END_MARKER
};
const dav_dyn_module dav_dyn_module_default =
{
DAV_DYN_MAGIC,
DAV_DYN_VERSION,
"filesystem",
NULL, /* module_open */
NULL, /* module_close */
NULL, /* dir_open */
NULL, /* dir_param */
NULL, /* dir_merge */
NULL, /* dir_close */
dav_dyn_providers_fs
};