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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/pread.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/pread.2')
| -rw-r--r-- | man2/pread.2 | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/man2/pread.2 b/man2/pread.2 index 9a97633235..5d4e0969ab 100644 --- a/man2/pread.2 +++ b/man2/pread.2 @@ -88,27 +88,16 @@ to any error specified for .BR write (2) or .BR lseek (2). -.SH VERSIONS -The -.BR pread () -and -.BR pwrite () -system calls were added in Linux 2.1.60; +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001. +.PP +Added in Linux 2.1.60; the entries in the i386 system call table were added in Linux 2.1.69. C library support (including emulation using .BR lseek (2) on older kernels without the system calls) was added in glibc 2.1. -.SH STANDARDS -POSIX.1-2001, POSIX.1-2008. -.SH NOTES -The -.BR pread () -and -.BR pwrite () -system calls are especially useful in multithreaded applications. -They allow multiple threads to perform I/O on the same file descriptor -without being affected by changes to the file offset by other threads. -.\" .SS C library/kernel differences On Linux, the underlying system calls were renamed in Linux 2.6: @@ -130,6 +119,14 @@ On some 32-bit architectures, the calling signature for these system calls differ, for the reasons described in .BR syscall (2). +.SH NOTES +The +.BR pread () +and +.BR pwrite () +system calls are especially useful in multithreaded applications. +They allow multiple threads to perform I/O on the same file descriptor +without being affected by changes to the file offset by other threads. .SH BUGS POSIX requires that opening a file with the .B O_APPEND |