But this does mean that since 5.12 supports (5.12 has ISREG|ISBLK, this actually matches 6.0 semantics): any -> pipe via splice seekable -> any Also, there are many seekable files which aren't regular, and the offset is updated regardless. This is obvious, but the wording is clumsy. Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx> --- man2/sendfile.2 | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/man2/sendfile.2 b/man2/sendfile.2 index 24de71072..a385949c1 100644 --- a/man2/sendfile.2 +++ b/man2/sendfile.2 @@ -91,12 +91,21 @@ .SH DESCRIPTION .BR mmap (2)-like operations (i.e., it cannot be a socket). +Except since Linux 5.12 +.\" commit b964bf53e540262f2d12672b3cca10842c0172e7 +and if +.I out_fd +is a pipe, in which case +.BR sendfile () +desugars to a +.BR splice (2) +and its restrictions apply. .P Before Linux 2.6.33, .I out_fd must refer to a socket. Since Linux 2.6.33 it can be any file. -If it is a regular file, then +If it's seekable, then .BR sendfile () changes the file offset appropriately. .SH RETURN VALUE -- 2.39.2
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