| /* |
| ** Copyright (C) 1998-2000 Greg Stein. All Rights Reserved. |
| ** |
| ** By using this file, you agree to the terms and conditions set forth in |
| ** the LICENSE.html file which can be found at the top level of the mod_dav |
| ** distribution or at http://www.webdav.org/mod_dav/license-1.html. |
| ** |
| ** Contact information: |
| ** Greg Stein, PO Box 760, Palo Alto, CA, 94302 |
| ** gstein@lyra.org, http://www.webdav.org/mod_dav/ |
| ** |
| */ |
| |
| /* |
| ** DAV filesystem-based repository provider |
| ** |
| ** Written 08/99 by John Vasta, vasta@rational.com, by separating |
| ** mod_dav into repository-independent and provider modules. |
| */ |
| |
| #include <string.h> |
| |
| #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 "dav_fs_repos.h" |
| |
| |
| /* to assist in debugging mod_dav's GET handling */ |
| #define DEBUG_GET_HANDLER 0 |
| #define DEBUG_PATHNAME_STYLE 0 |
| |
| #define DAV_FS_COPY_BLOCKSIZE 16384 /* copy 16k at a time */ |
| |
| /* context needed to identify a resource */ |
| struct dav_resource_private { |
| pool *pool; /* memory storage pool associated with request */ |
| const char *pathname; /* full pathname to resource */ |
| struct stat finfo; /* filesystem info */ |
| }; |
| |
| /* private context for doing a filesystem walk */ |
| typedef struct { |
| dav_walker_ctx *wctx; |
| |
| dav_resource res1; |
| dav_resource res2; |
| dav_resource_private info1; |
| dav_resource_private info2; |
| dav_buffer path1; |
| dav_buffer path2; |
| |
| dav_buffer locknull_buf; |
| |
| } dav_fs_walker_context; |
| |
| /* pull this in from the other source file */ |
| extern const dav_hooks_locks dav_hooks_locks_fs; |
| |
| /* forward-declare this sucker */ |
| static const dav_hooks_repository dav_hooks_repository_fs; |
| |
| /* |
| ** The Provider ID is used to differentiate "logical" providers that use |
| ** the same set of hook functions. Essentially, the ID is an instance |
| ** handle and the hooks are a vtable. |
| ** |
| ** In this module, we only have a single provider for each type, so we |
| ** actually ignore the Provider ID. |
| */ |
| #define DAV_FS_PROVIDER_ID 0 |
| |
| /* |
| ** 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 */ |
| }; |
| |
| /* |
| ** 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 |
| }; |