7
Bugs
- The history file path is not expanded from
~
to the full home directory path. read_history
andwrite_history
may encounter errors without handling them, e.g., file permissions or missing history file.- The check on
if(!(data || *data)){
inline_read()
might lead to a potential null pointer dereference ifreadline
returns null.
Optimizations
- Use
getenv("HOME")
orwordexp
to properly expand the tilde (~
) to the full path of the user's home directory. - Add error handling for
read_history
andwrite_history
calls. - Use
if(data == NULL || *data == '\0'){
inline_read()
to handle potential null addresses safely.
Good points
- Implements command completion which enhances user experience.
- Utilizes the
readline
library effectively for command-line interaction. - Code is modular and functions are appropriately separated by concerns.
Summary
The code provides a basic command-line interface with features for command completion and history storage using the readline
library. It does a commendable job on keeping possible commands and their completion minimalistic and straightforward. However, it encounters issues with the handling of user home directory paths in the context of a history file and lacks robust error handling concerning file operations for command history. Proper checks against null pointers need implementation to ensure more stable execution.
Open source alternatives
- GNU Readline: The library is already being used but reviewing the full set of its capabilities can further optimize command-line interaction with line editing and custom completers.
clap
: While mostly known for CLI parsing in Rust apps, its approach can inspire improvements in arguments handling.Linenoise
: A small, portable GNU Readline replacement for C.