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Merge pull request #5218 from tertsdiepraam/echo-fix-octal-wrapping

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`echo`: fix wrapping behavior of octal sequences
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Daniel Hofstetter 2023-10-03 13:52:56 +02:00 • committed by GitHub
commit 139f205783
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2 changed files with 126 additions and 57 deletions
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44
tests/by-util/test_echo.rs
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@ -236,3 +236,47 @@ fn test_hyphen_values_between() {
.success()
.stdout_is("dumdum dum dum dum -e dum\n");
}
#[test]
fn wrapping_octal() {
// Some odd behavior of GNU. Values of \0400 and greater do not fit in the
// u8 that we write to stdout. So we test that it wraps:
//
// We give it this input:
// \o501 = 1_0100_0001 (yes, **9** bits)
// This should be wrapped into:
// \o101 = 'A' = 0100_0001,
// because we only write a single character
new_ucmd!()
.arg("-e")
.arg("\\0501")
.succeeds()
.stdout_is("A\n");
}
#[test]
fn old_octal_syntax() {
new_ucmd!()
.arg("-e")
.arg("\\1foo")
.succeeds()
.stdout_is("\x01foo\n");
new_ucmd!()
.arg("-e")
.arg("\\43foo")
.succeeds()
.stdout_is("#foo\n");
new_ucmd!()
.arg("-e")
.arg("\\101 foo")
.succeeds()
.stdout_is("A foo\n");
new_ucmd!()
.arg("-e")
.arg("\\1011")
.succeeds()
.stdout_is("A1\n");
}