mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-22 01:48:52 +09:00
![Suriyan Ramasami](/assets/img/avatar_default.png)
Change the internal FAT functions to use loff_t for offsets. Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com> Acked-by: Simon Glass <sjg@chromium.org> [trini: Fix fs/fat/fat.c for min3 updates] Signed-off-by: Tom Rini <trini@ti.com>
184 lines
3.2 KiB
C
184 lines
3.2 KiB
C
/*
|
|
* file.c
|
|
*
|
|
* Mini "VFS" by Marcus Sundberg
|
|
*
|
|
* 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
|
|
* 2003-03-10 - kharris@nexus-tech.net - ported to uboot
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <malloc.h>
|
|
#include <fat.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/time.h>
|
|
|
|
/* Supported filesystems */
|
|
static const struct filesystem filesystems[] = {
|
|
{ file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
|
|
};
|
|
#define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
|
|
|
|
/* The filesystem which was last detected */
|
|
static int current_filesystem = FSTYPE_NONE;
|
|
|
|
/* The current working directory */
|
|
#define CWD_LEN 511
|
|
char file_cwd[CWD_LEN+1] = "/";
|
|
|
|
const char *
|
|
file_getfsname(int idx)
|
|
{
|
|
if (idx < 0 || idx >= NUM_FILESYS)
|
|
return NULL;
|
|
|
|
return filesystems[idx].name;
|
|
}
|
|
|
|
static void
|
|
pathcpy(char *dest, const char *src)
|
|
{
|
|
char *origdest = dest;
|
|
|
|
do {
|
|
if (dest-file_cwd >= CWD_LEN) {
|
|
*dest = '\0';
|
|
return;
|
|
}
|
|
*(dest) = *(src);
|
|
if (*src == '\0') {
|
|
if (dest-- != origdest && ISDIRDELIM(*dest)) {
|
|
*dest = '\0';
|
|
}
|
|
return;
|
|
}
|
|
++dest;
|
|
|
|
if (ISDIRDELIM(*src))
|
|
while (ISDIRDELIM(*src)) src++;
|
|
else
|
|
src++;
|
|
} while (1);
|
|
}
|
|
|
|
int
|
|
file_cd(const char *path)
|
|
{
|
|
if (ISDIRDELIM(*path)) {
|
|
while (ISDIRDELIM(*path)) path++;
|
|
strncpy(file_cwd+1, path, CWD_LEN-1);
|
|
} else {
|
|
const char *origpath = path;
|
|
char *tmpstr = file_cwd;
|
|
int back = 0;
|
|
|
|
while (*tmpstr != '\0') tmpstr++;
|
|
do {
|
|
tmpstr--;
|
|
} while (ISDIRDELIM(*tmpstr));
|
|
|
|
while (*path == '.') {
|
|
path++;
|
|
while (*path == '.') {
|
|
path++;
|
|
back++;
|
|
}
|
|
if (*path != '\0' && !ISDIRDELIM(*path)) {
|
|
path = origpath;
|
|
back = 0;
|
|
break;
|
|
}
|
|
while (ISDIRDELIM(*path)) path++;
|
|
origpath = path;
|
|
}
|
|
|
|
while (back--) {
|
|
/* Strip off path component */
|
|
while (!ISDIRDELIM(*tmpstr)) {
|
|
tmpstr--;
|
|
}
|
|
if (tmpstr == file_cwd) {
|
|
/* Incremented again right after the loop. */
|
|
tmpstr--;
|
|
break;
|
|
}
|
|
/* Skip delimiters */
|
|
while (ISDIRDELIM(*tmpstr)) tmpstr--;
|
|
}
|
|
tmpstr++;
|
|
if (*path == '\0') {
|
|
if (tmpstr == file_cwd) {
|
|
*tmpstr = '/';
|
|
tmpstr++;
|
|
}
|
|
*tmpstr = '\0';
|
|
return 0;
|
|
}
|
|
*tmpstr = '/';
|
|
pathcpy(tmpstr+1, path);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
file_detectfs(void)
|
|
{
|
|
int i;
|
|
|
|
current_filesystem = FSTYPE_NONE;
|
|
|
|
for (i = 0; i < NUM_FILESYS; i++) {
|
|
if (filesystems[i].detect() == 0) {
|
|
strcpy(file_cwd, "/");
|
|
current_filesystem = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return current_filesystem;
|
|
}
|
|
|
|
int
|
|
file_ls(const char *dir)
|
|
{
|
|
char fullpath[1024];
|
|
const char *arg;
|
|
|
|
if (current_filesystem == FSTYPE_NONE) {
|
|
printf("Can't list files without a filesystem!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ISDIRDELIM(*dir)) {
|
|
arg = dir;
|
|
} else {
|
|
sprintf(fullpath, "%s/%s", file_cwd, dir);
|
|
arg = fullpath;
|
|
}
|
|
return filesystems[current_filesystem].ls(arg);
|
|
}
|
|
|
|
int file_read(const char *filename, void *buffer, int maxsize)
|
|
{
|
|
char fullpath[1024];
|
|
const char *arg;
|
|
|
|
if (current_filesystem == FSTYPE_NONE) {
|
|
printf("Can't load file without a filesystem!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ISDIRDELIM(*filename)) {
|
|
arg = filename;
|
|
} else {
|
|
sprintf(fullpath, "%s/%s", file_cwd, filename);
|
|
arg = fullpath;
|
|
}
|
|
|
|
return filesystems[current_filesystem].read(arg, buffer, maxsize);
|
|
}
|