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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/** \file
* \brief Path name manipulation utilities
*
* Implement the legacy path name utility functions.
*/
#include "legacy-util-api.h"
#include <stddef.h>
#include <string.h>
#include <unistd.h> /* access() */
void
basenam(const char *orig_path, const char *optional_suffix, char *basename)
{
const char *fn = strrchr(orig_path, '/');
size_t length;
if (fn == NULL)
fn = orig_path;
else
++fn;
length = strlen(fn);
if (optional_suffix != NULL) {
size_t suffix_length = strlen(optional_suffix);
if (suffix_length >= length &&
strcmp(fn + length - suffix_length, optional_suffix) == 0)
length -= suffix_length;
}
memcpy(basename, fn, length);
basename[length] = '\0';
}
void
dirnam(const char *orig_path, char *dirname)
{
const char *slash = strrchr(orig_path, '/');
if (slash == NULL) {
strcpy(dirname, "./");
} else if (slash == orig_path) {
strcpy(dirname, "/");
} else {
size_t length = slash - orig_path;
memcpy(dirname, orig_path, length);
dirname[length] = '\0';
}
}
int
fndpath(const char *target, char *path, size_t max_length, const char *dirlist)
{
size_t target_length = target ? strlen(target) : 0;
if (target_length == 0)
return -1;
/* The legacy fndpath supplies a default dirlist of '.', which seems
* unsafe.
*/
if (dirlist == NULL || !*dirlist)
dirlist = ".";
while (*dirlist != '\0') {
const char *end = strchr(dirlist, ':');
size_t component_length = end ? end - dirlist : strlen(dirlist);
while (component_length > 1 &&
dirlist[component_length - 1] == '/') {
/* ignore trailing '/', unless it's the only character */
--component_length;
}
if (component_length > 0 &&
component_length + 1 /* '/' */ + target_length + 1 <= max_length) {
char *p = path;
memcpy(p, dirlist, component_length);
p += component_length;
*p++ = '/';
memcpy(p, target, target_length);
p[target_length] = '\0';
if (access(path, 0) == 0)
return 0; /* path exists */
}
if (end == NULL)
break;
dirlist = end + 1;
}
return -1;
}
FILE *
tmpf(char *ignored)
{
return tmpfile();
}
char *
mkperm(char *pattern, const char *oldext, const char *newext)
{
size_t length = strlen(pattern), ext_length = strlen(oldext);
if (ext_length <= length) {
char *at = pattern + length - ext_length;
if (memcmp(at, oldext, ext_length) == 0)
strcpy(at, newext);
}
return pattern;
}
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