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8 Commits

Author SHA1 Message Date
Nicholas J. Kain
170f87c0e7 Propagate returns through ifchange_(deconfig|bind). 
While doing so remove unnecessary argument null checks and
make sure not to alter the stored interface state if the
ifch requests failed.
 2015-02-14 19:10:23 -05:00
Nicholas J. Kain
44175bd77c Make ifch requests synchronous just like sockd requests. 
This change paves the way for allowing ifch to notify the core ndhc
about failures.  It would be far too difficult to reason about the
state machine if the requests to ifch were asynchronous.

Currently ndhc assumes that ifch requests never fail, but this
is not always true because of eg, rfkill.
 2015-02-14 16:49:50 -05:00
Nicholas J. Kain
702d8b0c5b Mark pointer arguments that cannot ever be null as [static 1]. 
Also constify some cases, too.
 2015-02-13 23:14:08 -05:00
Nicholas J. Kain
cc806acc0b Indicate that client_state_t and client_config_t pointer args 
cannot ever be null.

Could possibly improve code generation, and makes the intention clear.
 2015-02-13 22:29:03 -05:00
Nicholas J. Kain
c58a071f52 Update copyright dates. 2015-02-13 01:54:57 -05:00
Nicholas J. Kain
b00444ab8b Bound the subprocess lifetime using prctl(PR_SET_PDEATHSIG, ...). 
The pipes wouldn't do this job anymore because they were unused and thus
never performed writes that would generate SIGPIPEs, so the pipes are
removed, too.
 2014-04-15 18:01:01 -04:00
Nicholas J. Kain
5fa2030bab Use a socketpair rather than a pair of pipes for communication between 
ndhc and ifch, similar to sockd.  A single pipe is also maintained so
that SIGPIPE can bound the lifetime of an orphaned ifch process.
 2014-04-07 03:44:02 -04:00
Nicholas J. Kain
b761889025 Move source from ndhc/ to src/ since ifchd is no longer a separate program. 2014-04-06 16:57:06 -04:00