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eventscript: check that internal script events are being invoked correctly

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This is not as good as a compile-time check, but at least we count the
number of arguments are correct.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>


(This used to be ctdb commit 83b7b233cb4707e826f6ba260bd630c8bc8f1e76)
This commit is contained in:
Rusty Russell 2009-11-24 11:23:13 +10:30
parent 534c709cba
commit 0b4b83aea0
1 changed files with 45 additions and 0 deletions
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45
ctdb/server/eventscript.c
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@ -744,6 +744,45 @@ static int event_script_destructor(struct ctdb_event_script_state *state)
return 0;
}
static unsigned int count_words(const char *options)
{
unsigned int words = 0;
options += strspn(options, " \t");
while (*options) {
words++;
options += strcspn(options, " \t");
options += strspn(options, " \t");
}
return words;
}
static bool check_options(enum ctdb_eventscript_call call, const char *options)
{
switch (call) {
/* These all take no arguments. */
case CTDB_EVENT_STARTUP:
case CTDB_EVENT_START_RECOVERY:
case CTDB_EVENT_RECOVERED:
case CTDB_EVENT_STOPPED:
case CTDB_EVENT_MONITOR:
case CTDB_EVENT_STATUS:
case CTDB_EVENT_SHUTDOWN:
return count_words(options) == 0;
case CTDB_EVENT_TAKE_IP: /* interface, IP address, netmask bits. */
case CTDB_EVENT_RELEASE_IP:
return count_words(options) == 3;
case CTDB_EVENT_UNKNOWN:
return true;
default:
DEBUG(DEBUG_ERR,(__location__ "Unknown ctdb_eventscript_call %u\n", call));
return false;
}
}
/*
run the event script in the background, calling the callback when
finished
@ -804,6 +843,12 @@ static int ctdb_event_script_callback_v(struct ctdb_context *ctdb,
talloc_free(state);
return -1;
}
if (!check_options(state->call, state->options)) {
DEBUG(DEBUG_ERR, ("Bad eventscript options '%s' for %s\n",
call_names[state->call], state->options));
talloc_free(state);
return -1;
}
DEBUG(DEBUG_INFO,(__location__ " Starting eventscript %s %s\n",
call_names[state->call], state->options));