Author: ian Date: Fri Jul 20 16:06:44 2018 New Revision: 336553 URL: https://svnweb.freebsd.org/changeset/base/336553
Log: Apply some late-arriving markup suggestions from the phab review, and add a paragraph that mentions the possibility of starting ntpd as a non-root user rather than starting it as root and using its '-u' option to drop root privs after startup. Differential Revision: https://reviews.freebsd.org/D16281 Modified: head/share/man/man4/mac_ntpd.4 Modified: head/share/man/man4/mac_ntpd.4 ============================================================================== --- head/share/man/man4/mac_ntpd.4 Fri Jul 20 15:37:29 2018 (r336552) +++ head/share/man/man4/mac_ntpd.4 Fri Jul 20 16:06:44 2018 (r336553) @@ -23,7 +23,7 @@ .\" .\" $FreeBSD$ .\" -.Dd June 28, 2018 +.Dd July 20, 2018 .Dt MAC_NTPD 4 .Os .Sh NAME @@ -45,8 +45,9 @@ place the following line in your kernel configuration .Pp and in .Xr loader.conf 5 : -.Pp -.Dl "mac_ntpd_load=""YES""" +.Bd -literal -offset indent +mac_ntpd_load="YES" +.Ed .Sh DESCRIPTION The .Nm @@ -58,30 +59,28 @@ system time, and to (re-)bind to the privileged NTP po When .Xr ntpd 8 is started with -.Sq -u\ <user> +.Sq Fl u Ar <user>[:group] on the command line, it performs all initializations requiring root privileges, then drops root privileges by switching to the given user id. From that point on, the only privileges it requires are the ability to manipulate system time, and the ability to re-bind a UDP socket to the NTP port (port 123) after a network interface change. -By default, -.Fx -starts -.Xr ntpd 8 -with -.Sq -u\ ntpd:ntpd -on the command line, if the mac_ntpd policy is available to grant -the required privileges. .Pp +With the +.Nm +policy active, it may also be possible to start ntpd as a non-root user, +because the default ntpd options don't require any additional root +privileges beyond those granted by the policy. +.Pp .Ss Privileges Granted The exact set of kernel privileges granted to any process running with the configured uid is: .Bl -inset -compact -offset indent -.It PRIV_ADJTIME -.It PRIV_CLOCK_SETTIME -.It PRIV_NTP_ADJTIME -.It PRIV_NETINET_RESERVEDPORT -.It PRIV_NETINET_REUSEPORT +.It Dv PRIV_ADJTIME +.It Dv PRIV_CLOCK_SETTIME +.It Dv PRIV_NTP_ADJTIME +.It Dv PRIV_NETINET_RESERVEDPORT +.It Dv PRIV_NETINET_REUSEPORT .El .Pp .Ss Runtime Configuration _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
