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| author | Alejandro Colomar <alx@kernel.org> | 2023-03-17 17:08:01 +0100 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2023-03-30 15:14:55 +0200 |
| commit | 4131356cdab8d37fc395ca5466a0401c8573380c (patch) | |
| tree | 8c4c6f1c3172358b735b481cbbfdd9cc04b00ed9 /man2/poll.2 | |
| parent | fd00f831b52d61a91d59cb3b46182869145d9700 (diff) | |
| download | man-pages-4131356cdab8.tar.gz | |
man*/, man-pages.7: VERSIONS, STANDARDS, HISTORY: Reorganize sections
- Add a new HISTORY section that covers the history of an API, both
regarding implementations and regarding old standards. This was
previously covered in VERSIONS, and in some cases in STANDARDS.
- Repurpose VERSIONS to cover differing implementations in _current_
systems.
- STANDARDS is reduced to only cover current versions of standards.
That basically means only C11 (C99 has been superseeded by C11; C17
is just a bugfix of C11, so not really a new version), and
POSIX.1-2008 (*-2001 was superseeded by *-2008; *-2017 was just a
bugfix for *-2008). The section also mentions for example 'Linux',
'GNU' or 'BSD' when a non-standard API is Linux- or GNU-only or if
it's (de-facto) standard in the BSDs.
- In some cases content that should go into one of these sections was
in NOTES. Move it from there to where it corresponds.
- In the SYNOPSIS, I added [[deprecated]] in some functions that I
found are deprecated by the relevant standards.
- A few other related changes...
Cc: Oskari Pirhonen <xxc3ncoredxx@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Diffstat (limited to 'man2/poll.2')
| -rw-r--r-- | man2/poll.2 | 77 |
1 files changed, 39 insertions, 38 deletions
diff --git a/man2/poll.2 b/man2/poll.2 index be6de06076..4e26e62d40 100644 --- a/man2/poll.2 +++ b/man2/poll.2 @@ -358,39 +358,6 @@ is invalid (negative). .B ENOMEM Unable to allocate memory for kernel data structures. .SH VERSIONS -The -.BR poll () -system call was introduced in Linux 2.1.23. -On older kernels that lack this system call, -the glibc -.BR poll () -wrapper function provides emulation using -.BR select (2). -.PP -The -.BR ppoll () -system call was added in Linux 2.6.16. -The -.BR ppoll () -library call was added in glibc 2.4. -.SH STANDARDS -.BR poll () -conforms to POSIX.1-2001 and POSIX.1-2008. -.BR ppoll () -is Linux-specific. -.\" FIXME . -.\" ppoll() is proposed for inclusion in POSIX: -.\" https://www.austingroupbugs.net/view.php?id=1263 -.\" NetBSD 3.0 has a pollts() which is like Linux ppoll(). -.SH NOTES -The operation of -.BR poll () -and -.BR ppoll () -is not affected by the -.B O_NONBLOCK -flag. -.PP On some other UNIX systems, .\" Darwin, according to a report by Jeremy Sequoia, relayed by Josh Triplett .BR poll () @@ -412,11 +379,6 @@ with the value \-1 for use as a for .BR poll (). This constant is not provided in glibc. -.PP -For a discussion of what may happen if a file descriptor being monitored by -.BR poll () -is closed in another thread, see -.BR select (2). .SS C library/kernel differences The Linux .BR ppoll () @@ -448,6 +410,45 @@ See .BR sigprocmask (2) for a discussion on the differences between the kernel and the libc notion of the sigset. +.SH STANDARDS +.TP +.BR poll () +POSIX.1-2008. +.TP +.BR ppoll () +Linux. +.\" FIXME . +.\" ppoll() is proposed for inclusion in POSIX: +.\" https://www.austingroupbugs.net/view.php?id=1263 +.\" NetBSD 3.0 has a pollts() which is like Linux ppoll(). +.SH HISTORY +.TP +.BR poll () +POSIX.1-2001. +Linux 2.1.23. +.IP +On older kernels that lack this system call, +the glibc +.BR poll () +wrapper function provides emulation using +.BR select (2). +.TP +.BR ppoll () +Linux 2.6.16, +glibc 2.4. +.SH NOTES +The operation of +.BR poll () +and +.BR ppoll () +is not affected by the +.B O_NONBLOCK +flag. +.PP +For a discussion of what may happen if a file descriptor being monitored by +.BR poll () +is closed in another thread, see +.BR select (2). .SH BUGS See the discussion of spurious readiness notifications under the BUGS section of |