dir.c revision 499b34cea04a46823d003d4c0520c8b03e8513cb
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/*
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Copyright (C) 1999-2001 Internet Software Consortium.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont *
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Permission to use, copy, modify, and distribute this software for any
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * purpose with or without fee is hereby granted, provided that the above
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * copyright notice and this permission notice appear in all copies.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont *
2eeb74d1cf5355dd98f6d507a10086e16bb08c4bTinderbox User * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
83a28ca274521e15086fc39febde507bcc4e145eMark Andrews * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/* $Id: dir.c,v 1.15 2001/01/09 21:58:12 bwelling Exp $ */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/* Principal Authors: DCL */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <config.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <sys/types.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <sys/stat.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <ctype.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <errno.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <unistd.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <isc/dir.h>
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include <isc/magic.h>
6ea2385360e9e2167e65f9286447da9eea189457Tinderbox User#include <isc/string.h>
19c7b1a0293498a3e36692c59646ed6e15ffc8d0Tinderbox User#include <isc/util.h>
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#include "errno2result.h"
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#define ISC_DIR_MAGIC 0x4449522aU /* DIR*. */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont#define VALID_DIR(dir) ISC_MAGIC_VALID(dir, ISC_DIR_MAGIC)
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Huntvoid
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_dir_init(isc_dir_t *dir) {
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt REQUIRE(dir != NULL);
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt dir->entry.name[0] = '\0';
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt dir->entry.length = 0;
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont dir->handle = NULL;
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt dir->magic = ISC_DIR_MAGIC;
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont}
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/*
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt * Allocate workspace and open directory stream. If either one fails,
30eec077db2bdcb6f2a0dc388a3cdde2ede75ec1Mark Andrews * NULL will be returned.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_result_t
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_dir_open(isc_dir_t *dir, const char *dirname) {
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont isc_result_t result = ISC_R_SUCCESS;
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont REQUIRE(VALID_DIR(dir));
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt REQUIRE(dirname != NULL);
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt /*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Open stream.
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont dir->handle = opendir(dirname);
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt
30eec077db2bdcb6f2a0dc388a3cdde2ede75ec1Mark Andrews if (dir->handle == NULL)
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return isc__errno2result(errno);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (result);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont}
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Return previously retrieved file or get next one. Unix's dirent has
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * separate open and read functions, but the Win32 and DOS interfaces open
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * the dir stream and reads the first file in one operation.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_result_t
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_dir_read(isc_dir_t *dir) {
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont struct dirent *entry;
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont REQUIRE(VALID_DIR(dir) && dir->handle != NULL);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont /*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Fetch next file in directory.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont entry = readdir(dir->handle);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont if (entry == NULL)
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (ISC_R_NOMORE);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont /*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Make sure that the space for the name is long enough.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont if (sizeof(dir->entry.name) <= strlen(entry->d_name))
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (ISC_R_UNEXPECTED);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont strcpy(dir->entry.name, entry->d_name);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont /*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Some dirents have d_namlen, but it is not portable.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont dir->entry.length = strlen(entry->d_name);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (ISC_R_SUCCESS);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont}
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont/*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Close directory stream.
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontvoid
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_dir_close(isc_dir_t *dir) {
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont REQUIRE(VALID_DIR(dir) && dir->handle != NULL);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont (void)closedir(dir->handle);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont dir->handle = NULL;
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt}
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt/*
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt * Reposition directory stream at start.
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt */
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Huntisc_result_t
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Huntisc_dir_reset(isc_dir_t *dir) {
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt REQUIRE(VALID_DIR(dir) && dir->handle != NULL);
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt rewinddir(dir->handle);
ba751492fcc4f161a18b983d4f018a1a52938cb9Evan Hunt
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (ISC_R_SUCCESS);
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt}
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Huntisc_result_t
30eec077db2bdcb6f2a0dc388a3cdde2ede75ec1Mark Andrewsisc_dir_chdir(const char *dirname) {
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont /*
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont * Change the current directory to 'dirname'.
b0af7cbe9220775e23127f2f38750e4a281ee871Jeremy C. Reed */
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont REQUIRE(dirname != NULL);
b0af7cbe9220775e23127f2f38750e4a281ee871Jeremy C. Reed
b0af7cbe9220775e23127f2f38750e4a281ee871Jeremy C. Reed if (chdir(dirname) < 0)
b0af7cbe9220775e23127f2f38750e4a281ee871Jeremy C. Reed return (isc__errno2result(errno));
b0af7cbe9220775e23127f2f38750e4a281ee871Jeremy C. Reed
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont return (ISC_R_SUCCESS);
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupont}
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt
a631b30b1ddd8b2ea780371d0d99ba1c05bc7e42Francis Dupontisc_result_t
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Huntisc_dir_createunique(char *templet) {
isc_result_t result;
char *x;
char *p;
int i;
int pid;
REQUIRE(templet != NULL);
/*
* mkdtemp is not portable, so this emulates it.
*/
pid = getpid();
/*
* Replace trailing Xs with the process-id, zero-filled.
*/
for (x = templet + strlen(templet) - 1; *x == 'X' && x >= templet;
x--, pid /= 10)
*x = pid % 10 + '0';
x++; /* Set x to start of ex-Xs. */
do {
i = mkdir(templet, 0700);
if (i == 0 || errno != EEXIST)
break;
/*
* The BSD algorithm.
*/
p = x;
while (*p != '\0') {
if (isdigit(*p & 0xff))
*p = 'a';
else if (*p != 'z')
++*p;
else {
/*
* Reset character and move to next.
*/
*p++ = 'a';
continue;
}
break;
}
if (*p == '\0') {
/*
* Tried all combinations. errno should already
* be EEXIST, but ensure it is anyway for
* isc__errno2result().
*/
errno = EEXIST;
break;
}
} while (1);
if (i == -1)
result = isc__errno2result(errno);
else
result = ISC_R_SUCCESS;
return (result);
}