Re: [PATCH] process_vm_{read,write}v(3): initial man pages

On Tue, 20 Mar 2012 19:30:29 +1300
"Michael Kerrisk (man-pages)" [off-list ref] wrote:

And another question about a different part of the page:

quoted

+.SH "RETURN VALUE"
+On success,
+.BR process_vm_readv ()
+returns the number of bytes read while
+.BR process_vm_writev ()
+returns the number of bytes written.
+
+On error, the number of bytes read or written is returned, or -1 is
+returned if it was unable to read/write any bytes; in either case,
+.I errno
+is set appropriately.

Is that last piece really true? On error, how does the syscall return
number of bytes read or written *and* set errno?

Sorry the original was badly written on my part.

On error, one of two things will happen:
  - number of bytes read or written returned if a partial read/write
    occurred OR
  - -1 returned and errno set appropriately

Regards,

Chris

-- 
cyeoh-hXjcm30GF6XQT0dZR+AlfA@public.gmane.org

--
To unsubscribe from this list: send the line "unsubscribe linux-man" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html