The single-request option was introduced with glibc-2.10. Also, a note is added to resolver(3) that many of the options are actually described in resolv.conf(5). Signed-off-by: Petr Baudis <pasky@xxxxxxx> --- Ping, what about the other patches? ;-) diff --git a/man3/resolver.3 b/man3/resolver.3 index eabc1a4..181468a 100644 --- a/man3/resolver.3 +++ b/man3/resolver.3 @@ -232,6 +232,9 @@ domain and in parent domains. This option is used by .BR gethostbyname (3). [Enabled by default]. +.PP +This list is not complete. You can find some other flags described in +.BR resolv.conf (5). .SH "RETURN VALUE" The .BR res_init () diff --git a/man5/resolv.conf.5 b/man5/resolv.conf.5 index 4d67c75..2a2c694 100644 --- a/man5/resolv.conf.5 +++ b/man5/resolv.conf.5 @@ -231,6 +231,19 @@ sets in .IR _res.options . This enables support for the DNS extensions described in RFC\ 2671. +.TP +.BR single-request " (since glibc 2.10)" +sets +.BR RES_SNGLKUP +in +.IR _res.options . +By default, glibc performs IPv4 and IPv6 lookups in parallel since +version 2.9 (though many distribution packages of glibc are known +to disable that behavior in this version). Some appliance DNS servers +cannot handle these queries properly and make the requests time out. +This option disables the behavior and makes glibc perform the IPv6 +and IPv4 requests sequentially (at the cost of some slowdown of the +resolving process). .RE .LP The \fIdomain\fP and \fIsearch\fP keywords are mutually exclusive. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
