/* * 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) */