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https://github.com/brain-hackers/u-boot-brain
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![wdenk](/assets/img/avatar_default.png)
- remove trailing white space, trailing empty lines, C++ comments, etc. - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c) * Patches by Kenneth Johansson, 25 Jun 2003: - major rework of command structure (work done mostly by Michal Cendrowski and Joakim Kristiansen)
209 lines
4.1 KiB
C
209 lines
4.1 KiB
C
/*
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* file.c
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*
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* Mini "VFS" by Marcus Sundberg
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*
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* 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
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* 2003-03-10 - kharris@nexus-tech.net - ported to uboot
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <config.h>
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#include <malloc.h>
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#include <fat.h>
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#include <linux/stat.h>
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#include <linux/time.h>
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#if (CONFIG_COMMANDS & CFG_CMD_FAT)
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/* Supported filesystems */
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static const struct filesystem filesystems[] = {
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{ file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
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};
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#define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
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/* The filesystem which was last detected */
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static int current_filesystem = FSTYPE_NONE;
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/* The current working directory */
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#define CWD_LEN 511
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char file_cwd[CWD_LEN+1] = "/";
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const char *
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file_getfsname(int idx)
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{
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if (idx < 0 || idx >= NUM_FILESYS) return NULL;
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return filesystems[idx].name;
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}
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static void
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pathcpy(char *dest, const char *src)
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{
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char *origdest = dest;
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do {
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if (dest-file_cwd >= CWD_LEN) {
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*dest = '\0';
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return;
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}
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*(dest) = *(src);
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if (*src == '\0') {
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if (dest-- != origdest && ISDIRDELIM(*dest)) {
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*dest = '\0';
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}
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return;
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}
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++dest;
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if (ISDIRDELIM(*src)) {
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while (ISDIRDELIM(*src)) src++;
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} else {
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src++;
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}
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} while (1);
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}
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int
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file_cd(const char *path)
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{
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if (ISDIRDELIM(*path)) {
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while (ISDIRDELIM(*path)) path++;
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strncpy(file_cwd+1, path, CWD_LEN-1);
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} else {
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const char *origpath = path;
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char *tmpstr = file_cwd;
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int back = 0;
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while (*tmpstr != '\0') tmpstr++;
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do {
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tmpstr--;
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} while (ISDIRDELIM(*tmpstr));
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while (*path == '.') {
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path++;
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while (*path == '.') {
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path++;
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back++;
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}
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if (*path != '\0' && !ISDIRDELIM(*path)) {
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path = origpath;
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back = 0;
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break;
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}
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while (ISDIRDELIM(*path)) path++;
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origpath = path;
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}
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while (back--) {
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/* Strip off path component */
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while (!ISDIRDELIM(*tmpstr)) {
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tmpstr--;
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}
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if (tmpstr == file_cwd) {
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/* Incremented again right after the loop. */
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tmpstr--;
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break;
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}
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/* Skip delimiters */
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while (ISDIRDELIM(*tmpstr)) tmpstr--;
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}
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tmpstr++;
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if (*path == '\0') {
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if (tmpstr == file_cwd) {
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*tmpstr = '/';
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tmpstr++;
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}
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*tmpstr = '\0';
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return 0;
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}
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*tmpstr = '/';
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pathcpy(tmpstr+1, path);
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}
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return 0;
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}
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int
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file_detectfs(void)
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{
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int i;
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current_filesystem = FSTYPE_NONE;
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for (i = 0; i < NUM_FILESYS; i++) {
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if (filesystems[i].detect() == 0) {
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strcpy(file_cwd, "/");
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current_filesystem = i;
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break;
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}
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}
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return current_filesystem;
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}
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int
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file_ls(const char *dir)
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{
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char fullpath[1024];
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const char *arg;
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if (current_filesystem == FSTYPE_NONE) {
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printf("Can't list files without a filesystem!\n");
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return -1;
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}
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if (ISDIRDELIM(*dir)) {
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arg = dir;
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} else {
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sprintf(fullpath, "%s/%s", file_cwd, dir);
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arg = fullpath;
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}
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return filesystems[current_filesystem].ls(arg);
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}
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long
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file_read(const char *filename, void *buffer, unsigned long maxsize)
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{
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char fullpath[1024];
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const char *arg;
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if (current_filesystem == FSTYPE_NONE) {
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printf("Can't load file without a filesystem!\n");
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return -1;
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}
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if (ISDIRDELIM(*filename)) {
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arg = filename;
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} else {
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sprintf(fullpath, "%s/%s", file_cwd, filename);
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arg = fullpath;
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}
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return filesystems[current_filesystem].read(arg, buffer, maxsize);
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}
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#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
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