On 12/11/2012 06:35 AM, Tom H wrote:
You probably looked at the ifup script and not its man page because
the latter's pretty bare. "/usr/share/doc/initscripts-*/sysconfig.txt"
is more or less complete but I've found it lacking from time to time -
and then it catches up. For example, in initscripts-9.03.31 (and
perhaps in an earlier version too) it documents "NM_CONTROLLED".
In double-checking, no, I can grok it from just the man page. Quoting:
The ifup and ifdown commands may be used to configure (or,
respec-
tively, deconfigure) network interfaces based on interface
definitions
in the files /etc/sysconfig/network and
/etc/sysconfig/network-
scripts/ifcfg-<configuration>
Reading between the lines, yes, but even a cursory reading of the config
files is enough to make me ask 'hmm, can I set a variable in
/etc/sysconfig/network that is normally defined in the ifcfg file, and
which definition will override?' Obviously, the actual scripts'
behavior documented by the script itself trumps it, but reading the
source isn't necessary; of course, that assumes that the documentation
really is correct.
At least with NM_CONTROLLED it actually does work that way. Other items
could obvoiusly be special-cased in the scripts' sources, of course.
