improve log (#554)

[lidaobing]

/close #554

Summary by Sourcery

Improve logging format. Use pthread instead of std::thread to get thread name. Simplify the log level output to a single character. Shorten the file name in the log output. Change the timestamp format to only include time and milliseconds.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR improves the logging mechanism by modifying how logs are formatted and generated. The implementation replaces C++ thread identification with pthread functions, changes log level representation from strings to single characters, and adjusts both timestamp and filename formatting in log outputs.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated thread identification method	Replaced C++ this_thread::get_id() with pthread_self() Added inclusion of <pthread.h> for accessing pthread functions	src/iptux-utils/output.cpp
Modified log level representation	Changed the log level function from returning strings to single character codes Mapped log level values (DEBUG, INFO, MESSAGE, WARNING, ERROR, default) to 'D', 'I', 'M', 'W', 'E', and 'U' respectively	src/iptux-utils/output.cpp
Adjusted timestamp format in logs	Updated timestamp formatting to exclude the date, showing only hour, minute, and second Changed the strftime format string from '%Y-%m-%d %H:%M:%S' to '%H:%M:%S'	src/iptux-utils/output.cpp
Refactored filename extraction for logging	Modified the logic in pretty_fname to use the last occurrence of '/' instead of '/src/' Updated the substring offset from +5 to +1 for extracting the filename	src/iptux-utils/output.cpp
Updated logging format output	Adjusted the fprintf format string to accommodate the new log level single character and thread id formatting Removed the inclusion of and added <unistd.h> for system functions	src/iptux-utils/output.cpp

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#554	Remove date from timestamp and add microseconds	✅
#554	Shorten thread identifier to max 4 chars	❌	The PR uses the full thread ID from pthread_self(), which is not shortened to 4 characters
#554	Reduce log level from full word to single character	✅
#554	Remove full path from log message, keep only filename and align	✅

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[sourcery-ai]

Hey @lidaobing - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider verifying that using pthread_self() instead of std::this_thread::get_id() produces an easily readable thread identifier on all target platforms.
• Review whether representing log levels with a single character provides enough clarity for future debugging.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[github-actions]

Test Results

66 tests  ±0   66 ✅ ±0   2s ⏱️ ±0s
32 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 8266485. ± Comparison against base commit ec45ec3.

[codecov]

Codecov Report

Attention: Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.

Project coverage is 52.47%. Comparing base (ec45ec3) to head (8266485).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/iptux-utils/output.cpp	69.23%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #657      +/-   ##
==========================================
- Coverage   52.48%   52.47%   -0.02%     
==========================================
  Files          64       64              
  Lines        8558     8558              
==========================================
- Hits         4492     4491       -1     
- Misses       4066     4067       +1     

☔ View full report in Codecov by Sentry.
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