262     struct dirent *buf = NULL;  in shell_cmd_ls()  local
267         buf = readdir(dir);  in shell_cmd_ls()
268         if (buf == NULL)  in shell_cmd_ls()
272         if (buf->d_type == DT_DIR)  in shell_cmd_ls()
274         else if (buf->d_type == DT_REG)  in shell_cmd_ls()
276         else if (buf->d_type == DT_BLK || buf->d_type == DT_CHR)  in shell_cmd_ls()
281         sprintf(output_buf, "%s   ", buf->d_name);  in shell_cmd_ls()
333     char *buf = (char *)malloc(512);  in shell_cmd_cat()  local
337         memset(buf, 0, 512);  in shell_cmd_cat()
338         int l = read(fd, buf, 511);  in shell_cmd_cat()
344         buf[l] = '\0';  in shell_cmd_cat()
347         printf("%s", buf);  in shell_cmd_cat()
350     free(buf);  in shell_cmd_cat()
616 int parse_command(char *buf, int *argc, char ***argv)  in parse_command()  argument
621     while (index < INPUT_BUFFER_SIZE && buf[index] == ' ')  in parse_command()
624     if (!buf[index])  in parse_command()
631         if (!buf[i])  in parse_command()
633         if (buf[i] != ' ' && (buf[i + 1] == ' ' || buf[i + 1] == '\0'))  in parse_command()
646         *((*argv) + i) = &buf[index];  in parse_command()
647         while (index < (INPUT_BUFFER_SIZE - 1) && buf[index] && buf[index] != ' ')  in parse_command()
649         buf[index++] = '\0';  in parse_command()
652         while (index < INPUT_BUFFER_SIZE && buf[index] == ' ')  in parse_command()