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Code Issues Activity

fixup! dd: support the [io]flag=nocache option

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This commit is contained in:
Jeffrey Finkelstein 2023-05-07 16:33:21 -04:00
parent bd18a2a344
commit 4ff318aee1
2 changed files with 7 additions and 1 deletions
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2
src/uu/dd/src/dd.rs
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@ -793,6 +793,7 @@ fn dd_copy(mut i: Input, mut o: Output) -> std::io::Result<()> {
// TODO Better error handling for overflowing `len`.
if i.settings.iflags.nocache {
let offset = 0;
#[allow(clippy::useless_conversion)]
let len = i.src.len()?.try_into().unwrap();
i.discard_cache(offset, len);
}
@ -801,6 +802,7 @@ fn dd_copy(mut i: Input, mut o: Output) -> std::io::Result<()> {
// TODO Better error handling for overflowing `len`.
if i.settings.oflags.nocache {
let offset = 0;
#[allow(clippy::useless_conversion)]
let len = o.dst.len()?.try_into().unwrap();
o.discard_cache(offset, len);
}

6
tests/by-util/test_dd.rs
View file

@ -1541,11 +1541,15 @@ fn test_multiple_processes_reading_stdin() {
#[test]
#[cfg(target_os = "linux")]
fn test_nocache_stdin_error() {
#[cfg(not(target_env = "musl"))]
let detail = "Illegal seek";
#[cfg(target_env = "musl")]
let detail = "Invalid seek";
new_ucmd!()
.args(&["iflag=nocache", "count=0", "status=noxfer"])
.fails()
.code_is(1)
.stderr_only("dd: failed to discard cache for: 'standard input': Illegal seek\n0+0 records in\n0+0 records out\n");
.stderr_only(format!("dd: failed to discard cache for: 'standard input': {detail}\n0+0 records in\n0+0 records out\n"));
}
/// Test for discarding system file cache.