fix(tools/put): ignore the retval of printf

[stephenkgu]

Description

Issue(s)

• Close/close/Fix/fix/Resolve/resolve: Issue Link
  https://project.feishu.cn/taosdata_td/defect/detail/6779898771

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a minor code quality improvement by modifying sprintf calls within tools/src/pub.c. The changes explicitly cast the return value of sprintf to void, signaling that the number of characters written is intentionally not used. This practice helps prevent compiler warnings and clarifies the code's intent for future maintainers. Additionally, a minor file formatting adjustment was made to ensure a consistent newline at the end of the file.

Highlights

• sprintf return value handling: Explicitly ignored the return value of sprintf calls by casting them to (void) in tools/src/pub.c to suppress potential compiler warnings.
• File formatting: Ensured the tools/src/pub.c file ends with a newline character.

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Changelog

• tools/src/pub.c
  • Ignored the return value of sprintf by casting it to (void) in error handling paths.
  • Added a missing newline character at the end of the file.

Activity

• No specific activity (comments, reviews, etc.) has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request aims to fix compiler warnings about unused return values from sprintf by casting the calls to (void). While this is a valid approach to suppress the warning, I've suggested replacing the sprintf calls with strcpy for better performance and clarity, as it's more suitable for copying string literals. The change to add a newline at the end of tools/src/pub.c is a good housekeeping fix.

_{Note: Security Review did not run due to the size of the PR.}

[gemini-code-assist]

While casting to (void) silences the compiler warning about the unused result, using sprintf with a static string is inefficient and generally unsafe due to potential buffer overflows. Although the risk is minimal here with a short string literal, it's a good practice to use safer and more direct functions.

A better approach is to use strcpy. It's more direct for this purpose, slightly more performant as it avoids format string parsing, and doesn't trigger the warn_unused_result warning in most compiler configurations.

         strcpy(error, "dsn invalid, not found \"://\" ");

[gemini-code-assist]

Similar to the other sprintf call, strcpy is more appropriate here for copying a string literal. It improves code clarity and efficiency.

         strcpy(error, "dsn invalid, found \"?\" but not found \"=\" ");