[Logic769]

Problem

cksum - (an explicit - operand) printed the checksum without the file name, while GNU cksum prints - as the file name for an explicit operand. Only an implicit stdin (no operands) omits the name.

Change

Track whether the - operand was given explicitly on the command line and print the file name in that case. Added a regression test.

Closes #15984

[codspeed]

Merging this PR will degrade performance by 4.54%

1 warning, 1 note

⚠️ 125 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

ℹ️ 1 benchmark has no flamegraph

The flamegraph wasn't generated: most of the time was spent in runtime internals, which would leave nothing useful to analyze.

See affected benchmarks

❌ 1 regressed benchmark
✅ 400 untouched benchmarks
⏩ 70 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	CPU Simulation	df_deep_directory	888.9 µs	931.1 µs	-4.54%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing Logic769:cksum-explicit-stdin-filename (5a67d7b) with main (8e267ce)²}

Footnotes

1. 70 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (19f6602) during the generation of this report, so 8e267ce was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/misc/usage_vs_getopt (fails in this run but passes in the 'main' branch)