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Merge pull request #4189 from jfinkels/dd-stdin-from-file-descriptor

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dd: open stdin from file descriptor when possible
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Terts Diepraam 2023-03-18 01:30:31 +01:00 • committed by GitHub
commit e3aab307fe
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2 changed files with 59 additions and 4 deletions
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14
tests/by-util/test_dd.rs
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@ -1514,3 +1514,17 @@ fn test_skip_input_fifo() {
assert!(output.stdout.is_empty());
assert_eq!(&output.stderr, b"1+0 records in\n1+0 records out\n");
}
/// Test for reading part of stdin from each of two child processes.
#[cfg(all(not(windows), feature = "printf"))]
#[test]
fn test_multiple_processes_reading_stdin() {
// TODO Investigate if this is possible on Windows.
let printf = format!("{TESTS_BINARY} printf 'abcdef\n'");
let dd_skip = format!("{TESTS_BINARY} dd bs=1 skip=3 count=0");
let dd = format!("{TESTS_BINARY} dd");
UCommand::new()
.arg(format!("{printf} | ( {dd_skip} && {dd} ) 2> /dev/null"))
.succeeds()
.stdout_only("def\n");
}