linux: Add sendfile(2)

[kamalmarhubi]

No description provided.

[kamalmarhubi]

r? @arcnmx
since why not

[kamalmarhubi]

@homu r? @arcnmx

[kamalmarhubi]

hrm

[kamalmarhubi]

Oh, r? is part of rust-highfive I think.

[kamalmarhubi]

r+

[kamalmarhubi]

@homu r+

[homu]

📌 Commit 191c506 has been approved by kamalmarhubi

[kamalmarhubi]

@homu r-

[homu]

⌛ Testing commit 191c506 with merge 77f3355...

[kamalmarhubi]

woo it works

[kamalmarhubi]

@arcnmx would you mind taking a look? :-)

[arcnmx]

Where's test_sendfile? o:

[kamalmarhubi]

oh dear rebase fail

[kamalmarhubi]

@arcnmx fixed

[arcnmx]

Pretty straightforward, looks good! My only comment is that the test would deadlock on a system without buffered pipes, but that's not the case on Linux so..!

@homu r+

[homu]

📌 Commit 4680d50 has been approved by arcnmx

[homu]

⚡ Test exempted - status

[arcnmx]

Fancy, it used an older test result o:

[kamalmarhubi]

Cool!

@arcnmx out of curiosity, what common systems don't have buffered pipes?

[arcnmx]

No idea, probably none, but it's not specified so it's somewhat like relying on implementation details.

Applications should not rely on a particular capacity: an application should be designed so that a reading process consumes data as soon as it is available, so that a writing process does not remain blocked.