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Fix #342: prevent certain commands at bootstrap and shutdown

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Over the years there have been multiple cases of invalid and/or unsafe
uses of signals and initctl commands at bootstrap and shutdown.  These
cases cannot be safely supported.  This commit locks down finit a bit
to avoid the most common cases.

If you run into this, please open a new discussion at GitHub and we'll
talk about it.  Maybe I've been overzealous or you have another use-case
that warrants opening up some or parts of the API.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg committed 2023-01-10 17:18:50 +01:00
1 parent 947d91acd5
commit a39ee0b44d
2 files changed
+39
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src/api.c
+19
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@@ -365,6 +365,25 @@ static void api_cb(uev_t *w, void *arg, int events)
break;
}
switch (rq.cmd) {
case INIT_CMD_RUNLVL:
case INIT_CMD_RELOAD:
case INIT_CMD_START_SVC:
case INIT_CMD_RESTART_SVC:
case INIT_CMD_STOP_SVC:
case INIT_CMD_RELOAD_SVC:
case INIT_CMD_REBOOT:
case INIT_CMD_HALT:
case INIT_CMD_POWEROFF:
case INIT_CMD_SUSPEND:
if (runlevel == 0 || runlevel == 6) {
warnx("Unsupported command in runlevel S and 6.");
return;
}
default:
break;
}
switch (rq.cmd) {
case INIT_CMD_RUNLVL:
switch (rq.runlevel) {