251     struct dirent *buf = NULL;  in shell_cmd_ls()  local
256         buf = readdir(dir);  in shell_cmd_ls()
257         if (buf == NULL)  in shell_cmd_ls()
261         if (buf->d_type & VFS_IF_DIR)  in shell_cmd_ls()
263         else if (buf->d_type & VFS_IF_FILE)  in shell_cmd_ls()
265         else if (buf->d_type & VFS_IF_DEVICE)  in shell_cmd_ls()
270         sprintf(output_buf, "%s   ", buf->d_name);  in shell_cmd_ls()
317     char *buf = (char *)malloc(512);  in shell_cmd_cat()  local
318     memset(buf, 0, 512);  in shell_cmd_cat()
321         int l = read(fd, buf, 511);  in shell_cmd_cat()
322         buf[l] = '\0';  in shell_cmd_cat()
325         printf("%s", buf);  in shell_cmd_cat()
328     free(buf);  in shell_cmd_cat()
595 int parse_command(char *buf, int *argc, char ***argv)  in parse_command()  argument
600     while (index < INPUT_BUFFER_SIZE && buf[index] == ' ')  in parse_command()
607         if (!buf[i])  in parse_command()
609         if (buf[i] != ' ' && (buf[i + 1] == ' ' || buf[i + 1] == '\0'))  in parse_command()
622         *((*argv) + i) = &buf[index];  in parse_command()
623         while (index < (INPUT_BUFFER_SIZE - 1) && buf[index] && buf[index] != ' ')  in parse_command()
625         buf[index++] = '\0';  in parse_command()
628         while (index < INPUT_BUFFER_SIZE && buf[index] == ' ')  in parse_command()