4 * Mini "VFS" by Marcus Sundberg
6 * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
7 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #include <linux/stat.h>
34 #include <linux/time.h>
36 #if (CONFIG_COMMANDS & CFG_CMD_FAT)
38 /* Supported filesystems */
39 static const struct filesystem filesystems[] = {
40 { file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
42 #define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
44 /* The filesystem which was last detected */
45 static int current_filesystem = FSTYPE_NONE;
47 /* The current working directory */
49 char file_cwd[CWD_LEN+1] = "/";
52 file_getfsname(int idx)
54 if (idx < 0 || idx >= NUM_FILESYS) return NULL;
56 return filesystems[idx].name;
61 pathcpy(char *dest, const char *src)
63 char *origdest = dest;
66 if (dest-file_cwd >= CWD_LEN) {
72 if (dest-- != origdest && ISDIRDELIM(*dest)) {
78 if (ISDIRDELIM(*src)) {
79 while (ISDIRDELIM(*src)) src++;
88 file_cd(const char *path)
90 if (ISDIRDELIM(*path)) {
91 while (ISDIRDELIM(*path)) path++;
92 strncpy(file_cwd+1, path, CWD_LEN-1);
94 const char *origpath = path;
95 char *tmpstr = file_cwd;
98 while (*tmpstr != '\0') tmpstr++;
101 } while (ISDIRDELIM(*tmpstr));
103 while (*path == '.') {
105 while (*path == '.') {
109 if (*path != '\0' && !ISDIRDELIM(*path)) {
114 while (ISDIRDELIM(*path)) path++;
119 /* Strip off path component */
120 while (!ISDIRDELIM(*tmpstr)) {
123 if (tmpstr == file_cwd) {
124 /* Incremented again right after the loop. */
128 /* Skip delimiters */
129 while (ISDIRDELIM(*tmpstr)) tmpstr--;
133 if (tmpstr == file_cwd) {
141 pathcpy(tmpstr+1, path);
153 current_filesystem = FSTYPE_NONE;
155 for (i = 0; i < NUM_FILESYS; i++) {
156 if (filesystems[i].detect() == 0) {
157 strcpy(file_cwd, "/");
158 current_filesystem = i;
163 return current_filesystem;
168 file_ls(const char *dir)
173 if (current_filesystem == FSTYPE_NONE) {
174 printf("Can't list files without a filesystem!\n");
178 if (ISDIRDELIM(*dir)) {
181 sprintf(fullpath, "%s/%s", file_cwd, dir);
184 return filesystems[current_filesystem].ls(arg);
189 file_read(const char *filename, void *buffer, unsigned long maxsize)
194 if (current_filesystem == FSTYPE_NONE) {
195 printf("Can't load file without a filesystem!\n");
199 if (ISDIRDELIM(*filename)) {
202 sprintf(fullpath, "%s/%s", file_cwd, filename);
206 return filesystems[current_filesystem].read(arg, buffer, maxsize);
209 #endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */