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New: Errors in sendfile man page

Bug 86001 bugzilla-daemon-590EEB7GvNiWaY/[email protected] 1 participant 5 messages Oct 10, 2014 – Mar 11, 2016 1 message not in the archive Man-pages: manual pages for Linux -- Sections 2, 3, 4, 5, and 7

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#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=86001

Bug ID: 86001
Summary: Errors in sendfile man page
Product: Documentation
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: man-pages
Assignee: documentation_man-pages-ztI5WcYan/[email protected]
Reporter: safinaskar-JGs/[email protected]
Regression: No

Current "man sendfile" (git commit 36ad6ae0b4b6252a921a91dbd785de8fd88a364b) from kernel man pages contradicts to itself. The section "DESCRIPTION" says:
"In Linux kernels before 2.6.33, out_fd must refer to a socket. Since Linux 2.6.33 it can be any file", and AFAIK this is right current info. But the section "NOTES" says: "In Linux 2.4 and earlier, out_fd could also refer to a regular file" and this confuses. Also, the "NOTES" says: "The Linux-specific splice(2) call supports transferring data between arbitrary files (e.g., a pair of sockets)". This is wrong, because one splice call cannot splice together two sockets. So, please fix the man. Probably you should double-check whole man and make sure that whole man is up-to-date

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A message that is not in the archive (sent off-list or not yet received): bug-86001-11311-3bo0kxnWaOQUvHkbgXJLS5sdmw4N0Rt+2LY78lusg7I@public.gmane.org/

#2 lore raw

[Bug 86001] Errors in sendfile man page

https://bugzilla.kernel.org/show_bug.cgi?id=86001

Michael Kerrisk <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
                 CC|                            |[email protected]
         Resolution|---                         |CODE_FIX

--- Comment #1 from Michael Kerrisk <[email protected]> --- I changed the text in NOTES to

[[
In Linux 2.4 and earlier,
.I out_fd
could also refer to a regular file;
this possibility went away in the Linux 2.6.x kernel series, but was restored in Linux 2.6.33.
]]

Thanks,

Michael

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#3 lore raw

[Bug 86001] Errors in sendfile man page

In reply to a message not in the archive

https://bugzilla.kernel.org/show_bug.cgi?id=86001

Askar Safin <safinaskar-JGs/[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|RESOLVED                    |REOPENED
         Resolution|CODE_FIX                    |---

--- Comment #2 from Askar Safin <safinaskar-JGs/[email protected]> --- "The Linux-specific splice(2) call supports transferring data between arbitrary files (e.g., a pair of sockets)"

"pair of sockets" part is wrong. See splice(2). Also, I just tested this, splice doesn't work on pair of sockets (tested on Linux 3.16). So, please, change this phrase to (for example):

"The Linux-specific splice(2) call supports transferring data between arbitrary file descriptors provided one of them (or both) is a pipe".

(Also, where is your change? I don't see it in current head [
https://git.kernel.org/cgit/docs/man-pages/man-pages.git/tree/man2/sendfile.2?id=beb9356fdc3d377f27eec6fd2cb07b97bb1927d4
])

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#4 lore raw

[Bug 86001] Errors in sendfile man page

In reply to a message not in the archive

https://bugzilla.kernel.org/show_bug.cgi?id=86001

Michael Kerrisk <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|REOPENED                    |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #3 from Michael Kerrisk <[email protected]> --- (In reply to Askar Safin from comment #2)

Quoted 9 lines

"The Linux-specific splice(2) call supports transferring data between arbitrary files (e.g., a pair of sockets)"

"pair of sockets" part is wrong. See splice(2). Also, I just tested this, splice doesn't work on pair of sockets (tested on Linux 3.16). So, please, change this phrase to (for example):

"The Linux-specific splice(2) call supports transferring data between arbitrary file descriptors provided one of them (or both) is a pipe".

Thanks, Askar.

Changed as you suggest (but not yet pushed).

Cheers,

Michael

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#5 lore raw

[Bug 86001] Errors in sendfile man page

In reply to a message not in the archive

https://bugzilla.kernel.org/show_bug.cgi?id=86001

--- Comment #4 from Askar Safin <safinaskar-JGs/[email protected]> --- Thanks :)

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