The file referenced by
.I fd
must be capable of seeking.
-.SH "RETURN VALUE"
+.SH RETURN VALUE
On success, the number of bytes read or written is returned (zero
indicates that nothing was written, in the case of
.BR pwrite (),
C library support (including emulation using
.BR lseek (2)
on older kernels without the system calls) was added in glibc 2.1.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
POSIX.1-2001.
.SH NOTES
On Linux, the underlying system calls were renamed
.BR pwrite ()
appends data to the end of the file, regardless of the value of
.IR offset .
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR lseek (2),
.BR read (2),
.BR readv (2),