712 lines
16 KiB
C
712 lines
16 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2015-09-25 Bernard the first verion for FinSH
|
||
|
|
* 2021-06-09 Meco Man implement tail command
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <rtthread.h>
|
||
|
|
|
||
|
|
#if defined(RT_USING_FINSH) && defined(DFS_USING_POSIX)
|
||
|
|
|
||
|
|
#include <finsh.h>
|
||
|
|
#include "msh.h"
|
||
|
|
#include <dfs_file.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
|
||
|
|
static int msh_readline(int fd, char *line_buf, int size)
|
||
|
|
{
|
||
|
|
char ch;
|
||
|
|
int index = 0;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
if (read(fd, &ch, 1) != 1)
|
||
|
|
{
|
||
|
|
/* nothing in this file */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (ch == '\n' || ch == '\r');
|
||
|
|
|
||
|
|
/* set the first character */
|
||
|
|
line_buf[index ++] = ch;
|
||
|
|
|
||
|
|
while (index < size)
|
||
|
|
{
|
||
|
|
if (read(fd, &ch, 1) == 1)
|
||
|
|
{
|
||
|
|
if (ch == '\n' || ch == '\r')
|
||
|
|
{
|
||
|
|
line_buf[index] = '\0';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
line_buf[index++] = ch;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
line_buf[index] = '\0';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
|
||
|
|
int msh_exec_script(const char *cmd_line, int size)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
int fd = -1;
|
||
|
|
char *pg_name;
|
||
|
|
int length, cmd_length = 0;
|
||
|
|
|
||
|
|
if (size == 0) return -RT_ERROR;
|
||
|
|
|
||
|
|
/* get the length of command0 */
|
||
|
|
while ((cmd_line[cmd_length] != ' ' && cmd_line[cmd_length] != '\t') && cmd_length < size)
|
||
|
|
cmd_length ++;
|
||
|
|
|
||
|
|
/* get name length */
|
||
|
|
length = cmd_length + 32;
|
||
|
|
|
||
|
|
/* allocate program name memory */
|
||
|
|
pg_name = (char *) rt_malloc(length);
|
||
|
|
if (pg_name == RT_NULL) return -RT_ENOMEM;
|
||
|
|
|
||
|
|
/* copy command0 */
|
||
|
|
rt_memcpy(pg_name, cmd_line, cmd_length);
|
||
|
|
pg_name[cmd_length] = '\0';
|
||
|
|
|
||
|
|
if (strstr(pg_name, ".sh") != RT_NULL || strstr(pg_name, ".SH") != RT_NULL)
|
||
|
|
{
|
||
|
|
/* try to open program */
|
||
|
|
fd = open(pg_name, O_RDONLY, 0);
|
||
|
|
|
||
|
|
/* search in /bin path */
|
||
|
|
if (fd < 0)
|
||
|
|
{
|
||
|
|
rt_snprintf(pg_name, length - 1, "/bin/%.*s", cmd_length, cmd_line);
|
||
|
|
fd = open(pg_name, O_RDONLY, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_free(pg_name);
|
||
|
|
if (fd >= 0)
|
||
|
|
{
|
||
|
|
/* found script */
|
||
|
|
char *line_buf;
|
||
|
|
int length;
|
||
|
|
|
||
|
|
line_buf = (char *) rt_malloc(RT_CONSOLEBUF_SIZE);
|
||
|
|
if (line_buf == RT_NULL)
|
||
|
|
{
|
||
|
|
close(fd);
|
||
|
|
return -RT_ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* read line by line and then exec it */
|
||
|
|
do
|
||
|
|
{
|
||
|
|
length = msh_readline(fd, line_buf, RT_CONSOLEBUF_SIZE);
|
||
|
|
if (length > 0)
|
||
|
|
{
|
||
|
|
char ch = '\0';
|
||
|
|
int index;
|
||
|
|
|
||
|
|
for (index = 0; index < length; index ++)
|
||
|
|
{
|
||
|
|
ch = line_buf[index];
|
||
|
|
if (ch == ' ' || ch == '\t') continue;
|
||
|
|
else break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ch != '#') /* not a comment */
|
||
|
|
msh_exec(line_buf, length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (length > 0);
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
rt_free(line_buf);
|
||
|
|
|
||
|
|
ret = 0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ret = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef DFS_USING_WORKDIR
|
||
|
|
extern char working_directory[];
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static int cmd_ls(int argc, char **argv)
|
||
|
|
{
|
||
|
|
extern void ls(const char *pathname);
|
||
|
|
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
#ifdef DFS_USING_WORKDIR
|
||
|
|
ls(working_directory);
|
||
|
|
#else
|
||
|
|
ls("/");
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ls(argv[1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_ls, ls, List information about the FILEs.);
|
||
|
|
|
||
|
|
static int cmd_cp(int argc, char **argv)
|
||
|
|
{
|
||
|
|
void copy(const char *src, const char *dst);
|
||
|
|
|
||
|
|
if (argc != 3)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: cp SOURCE DEST\n");
|
||
|
|
rt_kprintf("Copy SOURCE to DEST.\n");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
copy(argv[1], argv[2]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_cp, cp, Copy SOURCE to DEST.);
|
||
|
|
|
||
|
|
static int cmd_mv(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc != 3)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: mv SOURCE DEST\n");
|
||
|
|
rt_kprintf("Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
char *dest = RT_NULL;
|
||
|
|
|
||
|
|
rt_kprintf("%s => %s\n", argv[1], argv[2]);
|
||
|
|
|
||
|
|
fd = open(argv[2], O_DIRECTORY, 0);
|
||
|
|
if (fd >= 0)
|
||
|
|
{
|
||
|
|
char *src;
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
|
||
|
|
/* it's a directory */
|
||
|
|
dest = (char *)rt_malloc(DFS_PATH_MAX);
|
||
|
|
if (dest == RT_NULL)
|
||
|
|
{
|
||
|
|
rt_kprintf("out of memory\n");
|
||
|
|
return -RT_ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
src = argv[1] + rt_strlen(argv[1]);
|
||
|
|
while (src != argv[1])
|
||
|
|
{
|
||
|
|
if (*src == '/') break;
|
||
|
|
src --;
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_snprintf(dest, DFS_PATH_MAX - 1, "%s/%s", argv[2], src);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
fd = open(argv[2], O_RDONLY, 0);
|
||
|
|
if (fd >= 0)
|
||
|
|
{
|
||
|
|
close(fd);
|
||
|
|
|
||
|
|
unlink(argv[2]);
|
||
|
|
}
|
||
|
|
|
||
|
|
dest = argv[2];
|
||
|
|
}
|
||
|
|
|
||
|
|
rename(argv[1], dest);
|
||
|
|
if (dest != RT_NULL && dest != argv[2]) rt_free(dest);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_mv, mv, Rename SOURCE to DEST.);
|
||
|
|
|
||
|
|
static int cmd_cat(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int index;
|
||
|
|
extern void cat(const char *filename);
|
||
|
|
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: cat [FILE]...\n");
|
||
|
|
rt_kprintf("Concatenate FILE(s)\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (index = 1; index < argc; index ++)
|
||
|
|
{
|
||
|
|
cat(argv[index]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_cat, cat, Concatenate FILE(s));
|
||
|
|
|
||
|
|
static void directory_delete_for_msh(const char *pathname, char f, char v)
|
||
|
|
{
|
||
|
|
DIR *dir = NULL;
|
||
|
|
struct dirent *dirent = NULL;
|
||
|
|
char *full_path;
|
||
|
|
|
||
|
|
if (pathname == RT_NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
full_path = (char *)rt_malloc(DFS_PATH_MAX);
|
||
|
|
if (full_path == RT_NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
dir = opendir(pathname);
|
||
|
|
if (dir == RT_NULL)
|
||
|
|
{
|
||
|
|
if (f == 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("cannot remove '%s'\n", pathname);
|
||
|
|
}
|
||
|
|
rt_free(full_path);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
dirent = readdir(dir);
|
||
|
|
if (dirent == RT_NULL)
|
||
|
|
break;
|
||
|
|
if (rt_strcmp(".", dirent->d_name) != 0 &&
|
||
|
|
rt_strcmp("..", dirent->d_name) != 0)
|
||
|
|
{
|
||
|
|
rt_sprintf(full_path, "%s/%s", pathname, dirent->d_name);
|
||
|
|
if (dirent->d_type == DT_REG)
|
||
|
|
{
|
||
|
|
if (unlink(full_path) != 0)
|
||
|
|
{
|
||
|
|
if (f == 0)
|
||
|
|
rt_kprintf("cannot remove '%s'\n", full_path);
|
||
|
|
}
|
||
|
|
else if (v)
|
||
|
|
{
|
||
|
|
rt_kprintf("removed '%s'\n", full_path);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (dirent->d_type == DT_DIR)
|
||
|
|
{
|
||
|
|
directory_delete_for_msh(full_path, f, v);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
closedir(dir);
|
||
|
|
rt_free(full_path);
|
||
|
|
if (unlink(pathname) != 0)
|
||
|
|
{
|
||
|
|
if (f == 0)
|
||
|
|
rt_kprintf("cannot remove '%s'\n", pathname);
|
||
|
|
}
|
||
|
|
else if (v)
|
||
|
|
{
|
||
|
|
rt_kprintf("removed directory '%s'\n", pathname);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cmd_rm(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int index, n;
|
||
|
|
char f = 0, r = 0, v = 0;
|
||
|
|
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: rm option(s) FILE...\n");
|
||
|
|
rt_kprintf("Remove (unlink) the FILE(s).\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (argv[1][0] == '-')
|
||
|
|
{
|
||
|
|
for (n = 0; argv[1][n]; n++)
|
||
|
|
{
|
||
|
|
switch (argv[1][n])
|
||
|
|
{
|
||
|
|
case 'f':
|
||
|
|
f = 1;
|
||
|
|
break;
|
||
|
|
case 'r':
|
||
|
|
r = 1;
|
||
|
|
break;
|
||
|
|
case 'v':
|
||
|
|
v = 1;
|
||
|
|
break;
|
||
|
|
case '-':
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
rt_kprintf("Error: Bad option: %c\n", argv[1][n]);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
argc -= 1;
|
||
|
|
argv = argv + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (index = 1; index < argc; index ++)
|
||
|
|
{
|
||
|
|
struct stat s;
|
||
|
|
if (stat(argv[index], &s) == 0)
|
||
|
|
{
|
||
|
|
if (s.st_mode & S_IFDIR)
|
||
|
|
{
|
||
|
|
if (r == 0)
|
||
|
|
rt_kprintf("cannot remove '%s': Is a directory\n", argv[index]);
|
||
|
|
else
|
||
|
|
directory_delete_for_msh(argv[index], f, v);
|
||
|
|
}
|
||
|
|
else if (s.st_mode & S_IFREG)
|
||
|
|
{
|
||
|
|
if (unlink(argv[index]) != 0)
|
||
|
|
{
|
||
|
|
if (f == 0)
|
||
|
|
rt_kprintf("cannot remove '%s'\n", argv[index]);
|
||
|
|
}
|
||
|
|
else if (v)
|
||
|
|
{
|
||
|
|
rt_kprintf("removed '%s'\n", argv[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (f == 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("cannot remove '%s': No such file or directory\n", argv[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_rm, rm, Remove(unlink) the FILE(s).);
|
||
|
|
|
||
|
|
#ifdef DFS_USING_WORKDIR
|
||
|
|
static int cmd_cd(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
rt_kprintf("%s\n", working_directory);
|
||
|
|
}
|
||
|
|
else if (argc == 2)
|
||
|
|
{
|
||
|
|
if (chdir(argv[1]) != 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("No such directory: %s\n", argv[1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_cd, cd, Change the shell working directory.);
|
||
|
|
|
||
|
|
static int cmd_pwd(int argc, char **argv)
|
||
|
|
{
|
||
|
|
rt_kprintf("%s\n", working_directory);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_pwd, pwd, Print the name of the current working directory.);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static int cmd_mkdir(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: mkdir [OPTION] DIRECTORY\n");
|
||
|
|
rt_kprintf("Create the DIRECTORY, if they do not already exist.\n");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
mkdir(argv[1], 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_mkdir, mkdir, Create the DIRECTORY.);
|
||
|
|
|
||
|
|
static int cmd_mkfs(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int result = 0;
|
||
|
|
char *type = "elm"; /* use the default file system type as 'fatfs' */
|
||
|
|
|
||
|
|
if (argc == 2)
|
||
|
|
{
|
||
|
|
result = dfs_mkfs(type, argv[1]);
|
||
|
|
}
|
||
|
|
else if (argc == 4)
|
||
|
|
{
|
||
|
|
if (strcmp(argv[1], "-t") == 0)
|
||
|
|
{
|
||
|
|
type = argv[2];
|
||
|
|
result = dfs_mkfs(type, argv[3]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: mkfs [-t type] device\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (result != RT_EOK)
|
||
|
|
{
|
||
|
|
rt_kprintf("mkfs failed, result=%d\n", result);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_mkfs, mkfs, format disk with file system);
|
||
|
|
|
||
|
|
extern struct dfs_filesystem filesystem_table[];
|
||
|
|
static int cmd_mount(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc == 1)
|
||
|
|
{
|
||
|
|
struct dfs_filesystem *iter;
|
||
|
|
|
||
|
|
/* display the mount history */
|
||
|
|
rt_kprintf("filesystem device mountpoint\n");
|
||
|
|
rt_kprintf("---------- ------ ----------\n");
|
||
|
|
for (iter = &filesystem_table[0];
|
||
|
|
iter < &filesystem_table[DFS_FILESYSTEMS_MAX]; iter++)
|
||
|
|
{
|
||
|
|
if ((iter != NULL) && (iter->path != NULL))
|
||
|
|
{
|
||
|
|
rt_kprintf("%-10s %-6s %-s\n",
|
||
|
|
iter->ops->name, iter->dev_id->parent.name, iter->path);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
else if (argc == 4)
|
||
|
|
{
|
||
|
|
char *device = argv[1];
|
||
|
|
char *path = argv[2];
|
||
|
|
char *fstype = argv[3];
|
||
|
|
|
||
|
|
/* mount a filesystem to the specified directory */
|
||
|
|
rt_kprintf("mount device %s(%s) onto %s ... ", device, fstype, path);
|
||
|
|
if (dfs_mount(device, path, fstype, 0, 0) == 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("succeed!\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("failed!\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: mount <device> <mountpoint> <fstype>.\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_mount, mount, mount <device> <mountpoint> <fstype>);
|
||
|
|
|
||
|
|
/* unmount the filesystem from the specified mountpoint */
|
||
|
|
static int cmd_umount(int argc, char **argv)
|
||
|
|
{
|
||
|
|
char *path = argv[1];
|
||
|
|
|
||
|
|
if (argc != 2)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: unmount <mountpoint>.\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_kprintf("unmount %s ... ", path);
|
||
|
|
if (dfs_unmount(path) < 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("failed!\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("succeed!\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_umount, umount, Unmount device from file system);
|
||
|
|
|
||
|
|
extern int df(const char *path);
|
||
|
|
static int cmd_df(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc != 2)
|
||
|
|
{
|
||
|
|
df("/");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if ((strcmp(argv[1], "--help") == 0) || (strcmp(argv[1], "-h") == 0))
|
||
|
|
{
|
||
|
|
rt_kprintf("df [path]\n");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
df(argv[1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_df, df, disk free);
|
||
|
|
|
||
|
|
static int cmd_echo(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc == 2)
|
||
|
|
{
|
||
|
|
rt_kprintf("%s\n", argv[1]);
|
||
|
|
}
|
||
|
|
else if (argc == 3)
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
|
||
|
|
fd = open(argv[2], O_RDWR | O_APPEND | O_CREAT, 0);
|
||
|
|
if (fd >= 0)
|
||
|
|
{
|
||
|
|
write(fd, argv[1], strlen(argv[1]));
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("open file:%s failed!\n", argv[2]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: echo \"string\" [filename]\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_echo, echo, echo string to file);
|
||
|
|
|
||
|
|
static int cmd_tail(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
char c = RT_NULL;
|
||
|
|
char *file_name = RT_NULL;
|
||
|
|
rt_uint32_t total_lines = 0;
|
||
|
|
rt_uint32_t target_line = 0;
|
||
|
|
rt_uint32_t current_line = 0;
|
||
|
|
rt_uint32_t required_lines = 0;
|
||
|
|
rt_uint32_t start_line = 0;
|
||
|
|
|
||
|
|
if (argc < 2)
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: tail [-n numbers] <filename>\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
else if (argc == 2)
|
||
|
|
{
|
||
|
|
required_lines = 10; /* default: 10 lines from tail */
|
||
|
|
file_name = argv[1];
|
||
|
|
}
|
||
|
|
else if (rt_strcmp(argv[1], "-n") == 0)
|
||
|
|
{
|
||
|
|
if (argv[2][0] != '+')
|
||
|
|
{
|
||
|
|
required_lines = atoi(argv[2]);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
start_line = atoi(&argv[2][1]); /* eg: +100, to get the 100 */
|
||
|
|
}
|
||
|
|
file_name = argv[3];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("Usage: tail [-n numbers] <filename>\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
fd = open(file_name, O_RDONLY);
|
||
|
|
if (fd < 0)
|
||
|
|
{
|
||
|
|
rt_kprintf("File doesn't exist\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
while ((read(fd, &c, sizeof(char))) > 0)
|
||
|
|
{
|
||
|
|
if(total_lines == 0)
|
||
|
|
{
|
||
|
|
total_lines++;
|
||
|
|
}
|
||
|
|
if (c == '\n')
|
||
|
|
{
|
||
|
|
total_lines++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_kprintf("\nTotal Number of lines:%d\n", total_lines);
|
||
|
|
|
||
|
|
if (start_line != 0)
|
||
|
|
{
|
||
|
|
if (total_lines >= start_line)
|
||
|
|
{
|
||
|
|
required_lines = total_lines - start_line + 1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rt_kprintf("\nError:Required lines are more than total number of lines\n");
|
||
|
|
close(fd);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (required_lines > total_lines)
|
||
|
|
{
|
||
|
|
rt_kprintf("\nError:Required lines are more than total number of lines\n");
|
||
|
|
close(fd);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
rt_kprintf("Required Number of lines:%d\n", required_lines);
|
||
|
|
|
||
|
|
target_line = total_lines - required_lines;
|
||
|
|
lseek(fd, 0, SEEK_SET); /* back to head */
|
||
|
|
|
||
|
|
while ((read(fd, &c, sizeof(char))) > 0)
|
||
|
|
{
|
||
|
|
if (current_line >= target_line)
|
||
|
|
{
|
||
|
|
rt_kprintf("%c", c);
|
||
|
|
}
|
||
|
|
if (c == '\n')
|
||
|
|
{
|
||
|
|
current_line++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
rt_kprintf("\n");
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
MSH_CMD_EXPORT_ALIAS(cmd_tail, tail, print the last N - lines data of the given file);
|
||
|
|
|
||
|
|
#endif /* defined(RT_USING_FINSH) && defined(DFS_USING_POSIX) */
|