fs: Add simple shell support

Add a simple shell that allows exploring the contents of the file
system.

Jira: ZEP-1235

Change-Id: Iaa49f0be18980dd740e9552ddf4761196a818884
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2016-11-08 10:21:37 +02:00 committed by Anas Nashif
commit 61cfaa1be1
3 changed files with 154 additions and 0 deletions

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@ -24,6 +24,13 @@ config FILE_SYSTEM
if FILE_SYSTEM
config FILE_SYSTEM_SHELL
bool "Enable file system shell"
depends on ENABLE_SHELL
help
This shell provides basic browsing of the contents of the
file system.
config FILE_SYSTEM_FAT
bool "FAT file system support"
default y

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@ -1,3 +1,4 @@
obj-$(CONFIG_FS_FAT_RAM_DISK) += fat_ram_diskio.o
obj-$(CONFIG_FS_FAT_FLASH_DISK) += fat_flash_diskio.o
obj-$(CONFIG_FILE_SYSTEM_FAT) += fat_fs.o
obj-$(CONFIG_FILE_SYSTEM_SHELL) += shell.o

146
subsys/fs/shell.c Normal file
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@ -0,0 +1,146 @@
/*
* Copyright (c) 2016 Intel Corporation
*
* 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.
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <misc/printk.h>
#include <misc/shell.h>
#include <init.h>
#include <fs.h>
#define MAX_PATH_LEN 128
static char cwd[MAX_PATH_LEN] = "/";
static int cmd_ls(int argc, char *argv[])
{
char path[MAX_PATH_LEN];
fs_dir_t dir;
int err;
if (argc < 2) {
strcpy(path, cwd);
} else if (argv[1][0] == '/') {
strncpy(path, argv[1], sizeof(path) - 1);
path[MAX_PATH_LEN - 1] = '\0';
} else {
if (strcmp(cwd, "/") == 0) {
snprintf(path, sizeof(path), "/%s", argv[1]);
} else {
snprintf(path, sizeof(path), "%s/%s", cwd, argv[1]);
}
}
err = fs_opendir(&dir, path);
if (err) {
printk("Unable to open %s (err %d)\n", path, err);
return 0;
}
while (1) {
struct fs_dirent entry;
err = fs_readdir(&dir, &entry);
if (err) {
printk("Unable to read directory\n");
break;
}
/* Check for end of directory listing */
if (entry.name[0] == '\0') {
break;
}
if (entry.type == FS_DIR_ENTRY_DIR) {
printk("%s/\n", entry.name);
} else {
printk("%s\n", entry.name);
}
}
fs_closedir(&dir);
return 0;
}
static int cmd_pwd(int argc, char *argv[])
{
printk("%s\n", cwd);
return 0;
}
static int cmd_cd(int argc, char *argv[])
{
char path[MAX_PATH_LEN];
struct fs_dirent entry;
int err;
if (argc < 2) {
strcpy(cwd, "/");
return 0;
}
if (strcmp(argv[1], "..") == 0) {
char *prev = strrchr(cwd, '/');
if (!prev || prev == cwd) {
strcpy(cwd, "/");
} else {
*prev = '\0';
}
/* No need to test that a parent exists */
return 0;
}
if (argv[1][0] == '/') {
strncpy(path, argv[1], sizeof(path) - 1);
path[MAX_PATH_LEN - 1] = '\0';
} else {
if (strcmp(cwd, "/") == 0) {
snprintf(path, sizeof(path), "/%s", argv[1]);
} else {
snprintf(path, sizeof(path), "%s/%s", cwd, argv[1]);
}
}
err = fs_stat(path, &entry);
if (err) {
printk("%s doesn't exist\n", path);
return 0;
}
if (entry.type != FS_DIR_ENTRY_DIR) {
printk("%s is not a directory\n", path);
return 0;
}
strcpy(cwd, path);
return 0;
}
struct shell_cmd fs_commands[] = {
{ "ls", cmd_ls, "List files in current directory" },
{ "cd", cmd_cd, "Change working directory" },
{ "pwd", cmd_pwd, "Print current working directory" },
{ NULL, NULL }
};
SHELL_REGISTER("fs", fs_commands);