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dd: show warning when using 0x size multiplier

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Show a warning when a block size includes "0x" since this is
ambiguous: the user may have meant "multiply the next number by zero"
or they may have meant "the following characters should be interpreted
as a hexadecimal number".
This commit is contained in:
Jeffrey Finkelstein 2022-02-01 23:22:01 -05:00
parent 1f7c08d87b
commit fec662a623
2 changed files with 41 additions and 0 deletions
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33
tests/by-util/test_dd.rs
View file

@ -198,6 +198,39 @@ fn test_x_multiplier() {
.stdout_is("abcdef");
}
#[test]
fn test_zero_multiplier_warning() {
for arg in ["count", "seek", "skip"] {
new_ucmd!()
.args(&[format!("{}=00x1", arg).as_str(), "status=none"])
.pipe_in("")
.succeeds()
.no_stdout()
.no_stderr();
new_ucmd!()
.args(&[format!("{}=0x1", arg).as_str(), "status=none"])
.pipe_in("")
.succeeds()
.no_stdout()
.stderr_contains("warning: '0x' is a zero multiplier; use '00x' if that is intended");
new_ucmd!()
.args(&[format!("{}=0x0x1", arg).as_str(), "status=none"])
.pipe_in("")
.succeeds()
.no_stdout()
.stderr_is("dd: warning: '0x' is a zero multiplier; use '00x' if that is intended\ndd: warning: '0x' is a zero multiplier; use '00x' if that is intended\n");
new_ucmd!()
.args(&[format!("{}=1x0x1", arg).as_str(), "status=none"])
.pipe_in("")
.succeeds()
.no_stdout()
.stderr_contains("warning: '0x' is a zero multiplier; use '00x' if that is intended");
}
}
#[test]
fn test_final_stats_noxfer() {
new_ucmd!()