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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*/
#include "dir.h"
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "dlz_minimal.h"
void
dir_init(dir_t *dir) {
dir->entry.name[0] = '\0';
dir->entry.length = 0;
dir->handle = NULL;
}
isc_result_t
dir_open(dir_t *dir, const char *dirname) {
char *p;
isc_result_t result = ISC_R_SUCCESS;
if (strlen(dirname) + 3 > sizeof(dir->dirname)) {
return (ISC_R_NOSPACE);
}
strcpy(dir->dirname, dirname);
p = dir->dirname + strlen(dir->dirname);
if (dir->dirname < p && *(p - 1) != '/') {
*p++ = '/';
}
*p++ = '*';
*p = '\0';
dir->handle = opendir(dirname);
if (dir->handle == NULL) {
switch (errno) {
case ENOTDIR:
case ELOOP:
case EINVAL:
case ENAMETOOLONG:
case EBADF:
result = ISC_R_INVALIDFILE;
break;
case ENOENT:
result = ISC_R_FILENOTFOUND;
break;
case EACCES:
case EPERM:
result = ISC_R_NOPERM;
break;
case ENOMEM:
result = ISC_R_NOMEMORY;
break;
default:
result = ISC_R_UNEXPECTED;
break;
}
}
return (result);
}
/*!
* \brief Return previously retrieved file or get next one.
*
* Unix's dirent has
* separate open and read functions, but the Win32 and DOS interfaces open
* the dir stream and reads the first file in one operation.
*/
isc_result_t
dir_read(dir_t *dir) {
struct dirent *entry;
entry = readdir(dir->handle);
if (entry == NULL) {
return (ISC_R_NOMORE);
}
if (sizeof(dir->entry.name) <= strlen(entry->d_name)) {
return (ISC_R_UNEXPECTED);
}
strcpy(dir->entry.name, entry->d_name);
dir->entry.length = strlen(entry->d_name);
return (ISC_R_SUCCESS);
}
/*!
* \brief Close directory stream.
*/
void
dir_close(dir_t *dir) {
(void)closedir(dir->handle);
dir->handle = NULL;
}
/*!
* \brief Reposition directory stream at start.
*/
isc_result_t
dir_reset(dir_t *dir) {
rewinddir(dir->handle);
return (ISC_R_SUCCESS);
}
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