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pread.2: BUGS: Note O_APPEND + pwrite() does the wrong thing 

See https://bugzilla.kernel.org/show_bug.cgi?id=43178

Reported-by: Kasper Dupont <kasperd@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2012-04-30 07:47:27 +12:00
parent 927ad1fb59
commit c3ee1c5d6a
1 changed files with 13 additions and 1 deletions
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14
man2/pread.2
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@ -20,7 +20,7 @@
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.TH PREAD 2 2010-11-21 "Linux" "Linux Programmer's Manual"
.TH PREAD 2 2012-04-30 "Linux" "Linux Programmer's Manual"
.SH NAME
pread, pwrite \- read from or write to a file descriptor at a given offset
.SH SYNOPSIS
@ -128,6 +128,18 @@ The glibc
and
.BR pwrite ()
wrapper functions transparently deal with the change.
.SH BUGS
POSIX requires that opening a file with the
.BR O_APPEND
flag should have no affect on the location at which
.BR pwrite ()
writes data.
However, on Linux, if a file is opened with
.\" FIXME https://bugzilla.kernel.org/show_bug.cgi?id=43178
.BR O_APPEND ,
.BR pwrite ()
appends data to the end of the file, regardless of the value of
.IR offset .
.SH "SEE ALSO"
.BR lseek (2),
.BR read (2),