logstorage: Use correct fd for fsync on gzip log files

[minminlittleshrimp]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes a file synchronization issue in the DLT offline log storage system. The change corrects the file descriptor used for fsync operations when dealing with gzip-compressed log files.

• Replaces fsync(fileno(config->log)) with fsync(config->fd) for proper file synchronization
• Adds validation to ensure the file descriptor is valid before attempting fsync
• Improves error handling with appropriate error messages for invalid file descriptors

Comments suppressed due to low confidence (1)

src/offlinelogstorage/dlt_offline_logstorage_behavior.c:1125

• [nitpick] The error message could be more descriptive by including the actual file descriptor value to aid in debugging. Consider: "invalid file descriptor (%d) for log file sync"

                            dlt_vlog(LOG_ERR, "%s: invalid file descriptor for log file sync\n", __func__);

[minminlittleshrimp]

Kindly review @lti9hc

[minminlittleshrimp]

Correct commit msg and commit title -> no gzip related

[alexmohr]

As the project was referenced automatically anyway but github, I wanted to share the dlt rust wrapper we just open sourced.
https://crates.io/crates/dlt-rs (wrapper only) and https://crates.io/crates/tracing-dlt (tracing sink)

Rust is more and more used in the automative world, so I was wondering if you're interested in linking the dlt crates I posted above somewhere in docs or readme.md?
It's a thin type safe rust wrapper around libdlt, so it makes sure that all communication with the daemon is done via the c library and no custom dlt logic is implemented in rust.

[LocutusOfBorg]

Hello please also check the content of #788 and integrate it, there are some improvements too