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https://github.com/troglobit/finit.git
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Joachim Wiberg
a58002588e
The code refactored in this commit has long been an eyesore. The
hand-over, from the sequential main() function, to the event loop
was clumsy at best and was very difficult to debug.
Instead of using a series of workers we now delegate everything to
the big state machine by introducing a new SM_BOOTSRTAP_WAIT_STATE.
Both the runparts and rc.local scripts now run in the background, no
longer blocking the event loop from responding to initctl calls. To
ensure they run at the same point in time two things have been done:
1. A new <int/bootstrap> condition has been added which triggers
runparts, which now is a regular task created by conf_init()
2. /etc/rc.local is started from SM_RUNLEVEL_WAIT_STATE when we
transition from runlevel S to any other runlevel.
Fixes #356
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
/* Finit state machine
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*
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* Copyright (c) 2016 Jonas Johansson <jonas.johansson@westermo.se>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef FINIT_SM_H_
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#define FINIT_SM_H_
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typedef enum {
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SM_BOOTSTRAP_STATE = 0, /* Init state, bootstrap services */
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SM_BOOTSTRAP_WAIT_STATE, /* Waiting for bootstrap to complete */
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SM_RUNNING_STATE, /* Normal state, services running */
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SM_RUNLEVEL_CHANGE_STATE, /* A runlevel change has occurred */
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SM_RUNLEVEL_WAIT_STATE, /* Waiting for all stopped runlevel processes to be halted */
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SM_RELOAD_CHANGE_STATE, /* A reload event has occurred */
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SM_RELOAD_WAIT_STATE, /* Waiting for all stopped reload processes to be halted */
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} sm_state_t;
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typedef struct sm {
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sm_state_t state; /* Running, Changed, Waiting, ... */
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int newlevel; /* Set on runlevel change to new runlevel, -1 if not change */
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int reload; /* Set on reload event, else 0 */
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int in_teardown; /* Set when waiting for all processes to be halted */
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} sm_t;
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extern sm_t sm;
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void sm_init(sm_t *sm);
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void sm_step(sm_t *sm);
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void sm_set_runlevel(sm_t *sm, int newlevel);
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void sm_set_reload(sm_t *sm);
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int sm_is_in_teardown(sm_t *sm);
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#endif /* FINIT_SM_H_ */
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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