dir.c revision bd911976d51f102751848568ccf56592fd5f6d77
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Copyright (C) 1999-2001, 2004, 2007-2009, 2011-2013, 2016, 2017 Internet Systems Consortium, Inc. ("ISC")
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * This Source Code Form is subject to the terms of the Mozilla Public
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * License, v. 2.0. If a copy of the MPL was not distributed with this
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * file, You can obtain one at http://mozilla.org/MPL/2.0/.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt/* Principal Authors: DCL */
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews#define ISC_DIR_MAGIC ISC_MAGIC('D', 'I', 'R', '*')
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt#define VALID_DIR(dir) ISC_MAGIC_VALID(dir, ISC_DIR_MAGIC)
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt memset(&(dir->entry.find_data), 0, sizeof(dir->entry.find_data));
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Allocate workspace and open directory stream. If either one fails,
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * NULL will be returned.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntisc_dir_open(isc_dir_t *dir, const char *dirname) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt REQUIRE(VALID_DIR(dir) && dir->search_handle == INVALID_HANDLE_VALUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Copy directory name. Need to have enough space for the name,
4a53e3c2b83c476a93148eaee0272649beb221caMark Andrews * a possible path separator, the wildcard, and the final NUL.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt /* XXXDCL ? */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt strlcpy(dir->dirname, dirname, sizeof(dir->dirname));
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Append path separator, if needed, and "*".
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt if (dir->dirname < p && *(p - 1) != '\\' && *(p - 1) != ':')
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *p++ = '\\';
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Open stream.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Return previously retrieved file or get next one. Unix's dirent has
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * separate open and read functions, but the Win32 and DOS interfaces open
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * the dir stream and reads the first file in one operation.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt REQUIRE(VALID_DIR(dir) && dir->search_handle != INVALID_HANDLE_VALUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * start_directory() already filled in the first entry.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Fetch next file in directory.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Either the last file has been processed or
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * an error has occurred. The former is not
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * really an error, but the latter is.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Make sure that the space for the name is long enough.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt strlcpy(dir->entry.name, dir->entry.find_data.cFileName,
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Close directory stream.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt REQUIRE(VALID_DIR(dir) && dir->search_handle != INVALID_HANDLE_VALUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Reposition directory stream at start.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt REQUIRE(VALID_DIR(dir) && dir->search_handle != INVALID_HANDLE_VALUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * NT cannot reposition the seek pointer to the beginning of the
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * the directory stream, but rather the directory needs to be
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * closed and reopened. The latter might fail.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Initialize isc_dir_t structure with new directory. The function
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * returns 0 on failure and nonzero on success.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * - Be sure to close previous stream before opening new one
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt REQUIRE(dir->search_handle == INVALID_HANDLE_VALUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Open stream and retrieve first file.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Something went wrong but we don't know what. GetLastError()
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * could give us more information about the error, but the
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * MSDN documentation is frustratingly thin about what
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * possible errors could have resulted. (Score one for
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * the Unix manual pages.) So there is just this lame error
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * instead of being able to differentiate ISC_R_NOTFOUND
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * from ISC_R_UNEXPECTED.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Make sure that the space for the name is long enough.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Fill in the data for the first entry of the directory.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt strlcpy(dir->entry.name, dir->entry.find_data.cFileName,
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Change the current directory to 'dirname'.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * mkdtemp is not portable, so this emulates it.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Replace trailing Xs with the process-id, zero-filled.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt for (x = templet + strlen(templet) - 1; *x == 'X' && x >= templet;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt x++; /* Set x to start of ex-Xs. */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * The BSD algorithm.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt while (*p != '\0') {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt else if (*p != 'z')
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Reset character and move to next.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt if (*p == '\0') {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Tried all combinations. errno should already
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * be EEXIST, but ensure it is anyway for
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * isc__errno2result().
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt } while (1);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt if (i == -1)