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pread.2: pread() and pwrite() are especially useful in multithreaded applications 

Reported-by: Марк Коренберг <socketpair@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2013-06-21 12:30:25 +02:00
parent 04aa92829d
commit 2857d3ff8a
1 changed files with 9 additions and 1 deletions
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man2/pread.2
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@ -22,7 +22,7 @@
.\" the source, must acknowledge the copyright and authors of this work.
.\" %%%LICENSE_END
.\"
.TH PREAD 2 2013-04-01 "Linux" "Linux Programmer's Manual"
.TH PREAD 2 2013-06-21 "Linux" "Linux Programmer's Manual"
.SH NAME
pread, pwrite \- read from or write to a file descriptor at a given offset
.SH SYNOPSIS
@ -115,6 +115,14 @@ on older kernels without the system calls) was added in glibc 2.1.
.SH CONFORMING TO
POSIX.1-2001.
.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.
On Linux, the underlying system calls were renamed
in kernel 2.6:
.BR pread ()