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| author | Eric S. Raymond <esr@thyrsus.com> | 2011-08-19 04:04:42 -0400 |
|---|---|---|
| committer | Eric S. Raymond <esr@thyrsus.com> | 2011-08-19 04:04:42 -0400 |
| commit | 2551c7b16d4ff0abc1b33a995122d8c0cd20ff79 (patch) | |
| tree | b4c043a29552fa5a35de6b72f947c8a6321881de /gpsd.xml | |
| parent | db373d933decad0ba097cc89de4b3f2cc9218c95 (diff) | |
| download | gpsd-2551c7b16d4ff0abc1b33a995122d8c0cd20ff79.tar.gz | |
The -N option no longer drops privileges.
The price is that only devices specified on the gpsd commmand line will
do PPS, because the calls to set line discipline stop being available
after we drop privileges. In practice, this shouldn't be a problem,
as PPS devices ar RS232 ports that can't be hotplugged and thus *must*
be specified on the command line.
All regression tests pass.
Diffstat (limited to 'gpsd.xml')
| -rw-r--r-- | gpsd.xml | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -193,8 +193,8 @@ nonexistent in USB GPSes which lack a DTR line.)</para> </varlistentry> <varlistentry> <term>-N</term> -<listitem><para>Don't daemonize; run in foreground. Also suppresses -privilege-dropping. This switch is mainly useful for debugging.</para> +<listitem><para>Don't daemonize; run in foreground. +This switch is mainly useful for debugging.</para> </listitem> </varlistentry> <varlistentry> @@ -795,6 +795,12 @@ supported.</para> <para>The ISGPS used for RTCM2 and subframes decoder logic is sufficiently convoluted to confuse some compiler optimizers, notably in GCC 3.x at -O2, into generating bad code.</para> + +<para>Devices meant to to use PPS for high-precision timekeeping may +fail if they are specifed after startup by a control-socket command, +as opposed to on the daemon's original command line. (Root privileges +are dropped early, and some Unix varients require them in order to set +the PPS line discipline.)</para> </refsect1> <refsect1 id='files'><title>FILES</title> |