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/*
* Filesystem utilities
*
* Copyright (c) 2016 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>
#include <stdarg.h>
#include "cutils.h"
#include "fs.h"
FSFile *fs_dup(FSDevice *fs, FSFile *f)
{
FSQID qid;
fs->fs_walk(fs, &f, &qid, f, 0, NULL);
return f;
}
FSFile *fs_walk_path1(FSDevice *fs, FSFile *f, const char *path,
char **pname)
{
const char *p;
char *name;
FSFile *f1;
FSQID qid;
int len, ret;
BOOL is_last, is_first;
if (path[0] == '/')
path++;
is_first = TRUE;
for(;;) {
p = strchr(path, '/');
if (!p) {
name = (char *)path;
if (pname) {
*pname = name;
if (is_first) {
ret = fs->fs_walk(fs, &f, &qid, f, 0, NULL);
if (ret < 0)
f = NULL;
}
return f;
}
is_last = TRUE;
} else {
len = p - path;
name = malloc(len + 1);
memcpy(name, path, len);
name[len] = '\0';
is_last = FALSE;
}
ret = fs->fs_walk(fs, &f1, &qid, f, 1, &name);
if (!is_last)
free(name);
if (!is_first)
fs->fs_delete(fs, f);
f = f1;
is_first = FALSE;
if (ret <= 0) {
fs->fs_delete(fs, f);
f = NULL;
break;
} else if (is_last) {
break;
}
path = p + 1;
}
return f;
}
FSFile *fs_walk_path(FSDevice *fs, FSFile *f, const char *path)
{
return fs_walk_path1(fs, f, path, NULL);
}
void fs_end(FSDevice *fs)
{
fs->fs_end(fs);
free(fs);
}
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