Rval ExpandDanglers(EvalContext *ctx, const char *ns, const char *scope, Rval rval, const Promise *pp)
{
assert(ctx);
assert(pp);
switch (rval.type)
{
case RVAL_TYPE_SCALAR:
if (IsCf3VarString(RvalScalarValue(rval)))
{
return EvaluateFinalRval(ctx, PromiseGetPolicy(pp), ns, scope, rval, false, pp);
}
else
{
return RvalCopy(rval);
}
break;
case RVAL_TYPE_LIST:
{
Rlist *result_list = RlistCopy(RvalRlistValue(rval));
RlistFlatten(ctx, &result_list);
return RvalNew(result_list, RVAL_TYPE_LIST);
}
break;
case RVAL_TYPE_CONTAINER:
case RVAL_TYPE_FNCALL:
case RVAL_TYPE_NOPROMISEE:
return RvalCopy(rval);
}
ProgrammingError("Unhandled Rval type");
}
static void Cf3ParseFiles()
{ struct Rlist *rp,*sl;
PARSING = true;
PROMISETIME = time(NULL);
Cf3ParseFile(VINPUTFILE);
// Expand any lists in this list now
HashVariables(NULL);
HashControls();
if (VINPUTLIST != NULL)
{
for (rp = VINPUTLIST; rp != NULL; rp=rp->next)
{
if (rp->type != CF_SCALAR)
{
CfOut(cf_error,"","Non-file object in inputs list\n");
}
else
{
struct Rval returnval;
if (strcmp(rp->item,CF_NULL_VALUE) == 0)
{
continue;
}
returnval = EvaluateFinalRval("sys",rp->item,rp->type,true,NULL);
switch (returnval.rtype)
{
case CF_SCALAR:
Cf3ParseFile((char *)returnval.item);
break;
case CF_LIST:
for (sl = (struct Rlist *)returnval.item; sl != NULL; sl=sl->next)
{
Cf3ParseFile((char *)sl->item);
}
break;
}
DeleteRvalItem(returnval.item,returnval.rtype);
}
HashVariables(NULL);
HashControls();
}
}
HashVariables(NULL);
PARSING = false;
}
static Policy *LoadPolicyInputFiles(EvalContext *ctx, GenericAgentConfig *config, const Rlist *inputs, StringSet *parsed_files_and_checksums, StringSet *failed_files)
{
Policy *policy = PolicyNew();
for (const Rlist *rp = inputs; rp; rp = rp->next)
{
if (rp->val.type != RVAL_TYPE_SCALAR)
{
Log(LOG_LEVEL_ERR, "Non-file object in inputs list");
continue;
}
const char *unresolved_input = RlistScalarValue(rp);
if (strcmp(CF_NULL_VALUE, unresolved_input) == 0)
{
continue;
}
if (IsExpandable(unresolved_input))
{
PolicyResolve(ctx, policy, config);
}
Rval resolved_input = EvaluateFinalRval(ctx, policy, NULL, "sys", rp->val, true, NULL);
Policy *aux_policy = NULL;
switch (resolved_input.type)
{
case RVAL_TYPE_SCALAR:
if (IsCf3VarString(RvalScalarValue(resolved_input)))
{
Log(LOG_LEVEL_ERR, "Unresolved variable '%s' in input list, cannot parse", RvalScalarValue(resolved_input));
break;
}
aux_policy = LoadPolicyFile(ctx, config, GenericAgentResolveInputPath(config, RvalScalarValue(resolved_input)), parsed_files_and_checksums, failed_files);
break;
case RVAL_TYPE_LIST:
aux_policy = LoadPolicyInputFiles(ctx, config, RvalRlistValue(resolved_input), parsed_files_and_checksums, failed_files);
break;
default:
ProgrammingError("Unknown type in input list for parsing: %d", resolved_input.type);
break;
}
if (aux_policy)
{
policy = PolicyMerge(policy, aux_policy);
}
RvalDestroy(resolved_input);
}
return policy;
}
Promise *ExpandDeRefPromise(EvalContext *ctx, const char *scopeid, const Promise *pp)
{
Promise *pcopy;
Rval returnval, final;
CfDebug("ExpandDerefPromise()\n");
pcopy = xcalloc(1, sizeof(Promise));
returnval = ExpandPrivateRval(ctx, "this", (Rval) {pp->promiser, RVAL_TYPE_SCALAR });
pcopy->promiser = (char *) returnval.item;
if (pp->promisee.item)
{
pcopy->promisee = EvaluateFinalRval(ctx, scopeid, pp->promisee, true, pp);
}
else
{
pcopy->promisee = (Rval) {NULL, RVAL_TYPE_NOPROMISEE };
}
if (pp->classes)
{
pcopy->classes = xstrdup(pp->classes);
}
else
{
pcopy->classes = xstrdup("any");
}
if (pcopy->promiser == NULL)
{
ProgrammingError("ExpandPromise returned NULL");
}
pcopy->parent_promise_type = pp->parent_promise_type;
pcopy->offset.line = pp->offset.line;
pcopy->comment = pp->comment ? xstrdup(pp->comment) : NULL;
pcopy->conlist = SeqNew(10, ConstraintDestroy);
pcopy->org_pp = pp->org_pp;
/* No further type checking should be necessary here, already done by CheckConstraintTypeMatch */
for (size_t i = 0; i < SeqLength(pp->conlist); i++)
{
Constraint *cp = SeqAt(pp->conlist, i);
Rval returnval;
if (ExpectedDataType(cp->lval) == DATA_TYPE_BUNDLE)
{
final = ExpandBundleReference(ctx, scopeid, cp->rval);
}
else
{
/* No further type checking should be necessary here, already done by CheckConstraintTypeMatch */
for (size_t i = 0; i < SeqLength(pp->conlist); i++)
{
Constraint *cp = SeqAt(pp->conlist, i);
Rval returnval;
if (ExpectedDataType(cp->lval) == DATA_TYPE_BUNDLE)
{
final = ExpandBundleReference(ctx, NULL, "this", cp->rval);
}
else
{
returnval = EvaluateFinalRval(ctx, NULL, "this", cp->rval, false, pp);
final = ExpandDanglers(ctx, NULL, "this", returnval, pp);
RvalDestroy(returnval);
}
if (IsDefinedClass(ctx, cp->classes, PromiseGetNamespace(pcopy)))
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, final, false);
cp_copy->offset = cp->offset;
}
if (strcmp(cp->lval, "comment") == 0)
{
if (final.type != RVAL_TYPE_SCALAR)
{
char err[CF_BUFSIZE];
static void ResolveControlBody(EvalContext *ctx, GenericAgentConfig *config, const Body *control_body)
{
const ConstraintSyntax *body_syntax = NULL;
Rval returnval;
assert(strcmp(control_body->name, "control") == 0);
for (int i = 0; CONTROL_BODIES[i].constraints != NULL; i++)
{
body_syntax = CONTROL_BODIES[i].constraints;
if (strcmp(control_body->type, CONTROL_BODIES[i].body_type) == 0)
{
break;
}
}
if (body_syntax == NULL)
{
FatalError(ctx, "Unknown agent");
}
char scope[CF_BUFSIZE];
snprintf(scope, CF_BUFSIZE, "%s_%s", control_body->name, control_body->type);
Log(LOG_LEVEL_DEBUG, "Initiate control variable convergence for scope '%s'", scope);
EvalContextStackPushBodyFrame(ctx, NULL, control_body, NULL);
for (size_t i = 0; i < SeqLength(control_body->conlist); i++)
{
Constraint *cp = SeqAt(control_body->conlist, i);
if (!IsDefinedClass(ctx, cp->classes))
{
continue;
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_BUNDLESEQUENCE].lval) == 0)
{
returnval = ExpandPrivateRval(ctx, NULL, scope, cp->rval.item, cp->rval.type);
}
else
{
returnval = EvaluateFinalRval(ctx, control_body->parent_policy, NULL, scope, cp->rval, true, NULL);
}
VarRef *ref = VarRefParseFromScope(cp->lval, scope);
EvalContextVariableRemove(ctx, ref);
if (!EvalContextVariablePut(ctx, ref, returnval.item, ConstraintSyntaxGetDataType(body_syntax, cp->lval), "source=promise"))
{
Log(LOG_LEVEL_ERR, "Rule from %s at/before line %zu", control_body->source_path, cp->offset.line);
}
VarRefDestroy(ref);
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_OUTPUT_PREFIX].lval) == 0)
{
strncpy(VPREFIX, returnval.item, CF_MAXVARSIZE);
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_DOMAIN].lval) == 0)
{
strcpy(VDOMAIN, cp->rval.item);
Log(LOG_LEVEL_VERBOSE, "SET domain = %s", VDOMAIN);
EvalContextVariableRemoveSpecial(ctx, SPECIAL_SCOPE_SYS, "domain");
EvalContextVariableRemoveSpecial(ctx, SPECIAL_SCOPE_SYS, "fqhost");
snprintf(VFQNAME, CF_MAXVARSIZE, "%s.%s", VUQNAME, VDOMAIN);
EvalContextVariablePutSpecial(ctx, SPECIAL_SCOPE_SYS, "fqhost", VFQNAME, DATA_TYPE_STRING, "inventory,source=agent,group=Host name");
EvalContextVariablePutSpecial(ctx, SPECIAL_SCOPE_SYS, "domain", VDOMAIN, DATA_TYPE_STRING, "source=agent");
EvalContextClassPutHard(ctx, VDOMAIN, "source=agent");
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_IGNORE_MISSING_INPUTS].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET ignore_missing_inputs %s", RvalScalarValue(cp->rval));
config->ignore_missing_inputs = BooleanFromString(cp->rval.item);
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_IGNORE_MISSING_BUNDLES].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET ignore_missing_bundles %s", RvalScalarValue(cp->rval));
config->ignore_missing_bundles = BooleanFromString(cp->rval.item);
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_CACHE_SYSTEM_FUNCTIONS].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET cache_system_functions %s", RvalScalarValue(cp->rval));
bool cache_system_functions = BooleanFromString(RvalScalarValue(cp->rval));
EvalContextSetEvalOption(ctx, EVAL_OPTION_CACHE_SYSTEM_FUNCTIONS,
cache_system_functions);
}
if (strcmp(cp->lval, CFG_CONTROLBODY[COMMON_CONTROL_GOALPATTERNS].lval) == 0)
{
/* Ignored */
continue;
}
RvalDestroy(returnval);
}
EvalContextStackPopFrame(ctx);
}
/**
* Evaluate the relevant control body, and set the
* relevant fields in #ctx and #config.
*/
static void ResolveControlBody(EvalContext *ctx, GenericAgentConfig *config,
const Body *control_body)
{
const char *filename = control_body->source_path;
assert(CFG_CONTROLBODY[COMMON_CONTROL_MAX].lval == NULL);
const ConstraintSyntax *body_syntax = NULL;
for (int i = 0; CONTROL_BODIES[i].constraints != NULL; i++)
{
body_syntax = CONTROL_BODIES[i].constraints;
if (strcmp(control_body->type, CONTROL_BODIES[i].body_type) == 0)
{
break;
}
}
if (body_syntax == NULL)
{
FatalError(ctx, "Unknown control body: %s", control_body->type);
}
char *scope;
assert(strcmp(control_body->name, "control") == 0);
xasprintf(&scope, "control_%s", control_body->type);
Log(LOG_LEVEL_DEBUG, "Initiate control variable convergence for scope '%s'", scope);
EvalContextStackPushBodyFrame(ctx, NULL, control_body, NULL);
for (size_t i = 0; i < SeqLength(control_body->conlist); i++)
{
const char *lval;
Rval evaluated_rval;
size_t lineno;
/* Use nested scope to constrain cp. */
{
Constraint *cp = SeqAt(control_body->conlist, i);
lval = cp->lval;
lineno = cp->offset.line;
if (!IsDefinedClass(ctx, cp->classes))
{
continue;
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_BUNDLESEQUENCE].lval) == 0)
{
evaluated_rval = ExpandPrivateRval(ctx, NULL, scope,
cp->rval.item, cp->rval.type);
}
else
{
evaluated_rval = EvaluateFinalRval(ctx, control_body->parent_policy,
NULL, scope, cp->rval,
true, NULL);
}
} /* Close scope: assert we only use evaluated_rval, not cp->rval. */
VarRef *ref = VarRefParseFromScope(lval, scope);
EvalContextVariableRemove(ctx, ref);
DataType rval_proper_datatype =
ConstraintSyntaxGetDataType(body_syntax, lval);
if (evaluated_rval.type != DataTypeToRvalType(rval_proper_datatype))
{
Log(LOG_LEVEL_ERR,
"Attribute '%s' in %s:%zu is of wrong type, skipping",
lval, filename, lineno);
VarRefDestroy(ref);
RvalDestroy(evaluated_rval);
continue;
}
bool success = EvalContextVariablePut(
ctx, ref, evaluated_rval.item, rval_proper_datatype,
"source=promise");
if (!success)
{
Log(LOG_LEVEL_ERR,
"Attribute '%s' in %s:%zu can't be added, skipping",
lval, filename, lineno);
VarRefDestroy(ref);
RvalDestroy(evaluated_rval);
continue;
}
VarRefDestroy(ref);
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_OUTPUT_PREFIX].lval) == 0)
{
strlcpy(VPREFIX, RvalScalarValue(evaluated_rval),
sizeof(VPREFIX));
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_DOMAIN].lval) == 0)
{
strlcpy(VDOMAIN, RvalScalarValue(evaluated_rval),
sizeof(VDOMAIN));
Log(LOG_LEVEL_VERBOSE, "SET domain = %s", VDOMAIN);
EvalContextVariableRemoveSpecial(ctx, SPECIAL_SCOPE_SYS, "domain");
EvalContextVariableRemoveSpecial(ctx, SPECIAL_SCOPE_SYS, "fqhost");
snprintf(VFQNAME, CF_MAXVARSIZE, "%s.%s", VUQNAME, VDOMAIN);
EvalContextVariablePutSpecial(ctx, SPECIAL_SCOPE_SYS, "fqhost",
VFQNAME, CF_DATA_TYPE_STRING,
"inventory,source=agent,attribute_name=Host name");
EvalContextVariablePutSpecial(ctx, SPECIAL_SCOPE_SYS, "domain",
VDOMAIN, CF_DATA_TYPE_STRING,
"source=agent");
EvalContextClassPutHard(ctx, VDOMAIN, "source=agent");
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_IGNORE_MISSING_INPUTS].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET ignore_missing_inputs %s",
RvalScalarValue(evaluated_rval));
config->ignore_missing_inputs = BooleanFromString(
RvalScalarValue(evaluated_rval));
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_IGNORE_MISSING_BUNDLES].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET ignore_missing_bundles %s",
RvalScalarValue(evaluated_rval));
config->ignore_missing_bundles = BooleanFromString(
RvalScalarValue(evaluated_rval));
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_CACHE_SYSTEM_FUNCTIONS].lval) == 0)
{
Log(LOG_LEVEL_VERBOSE, "SET cache_system_functions %s",
RvalScalarValue(evaluated_rval));
bool cache_system_functions = BooleanFromString(
RvalScalarValue(evaluated_rval));
EvalContextSetEvalOption(ctx, EVAL_OPTION_CACHE_SYSTEM_FUNCTIONS,
cache_system_functions);
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_PROTOCOL_VERSION].lval) == 0)
{
config->protocol_version = ProtocolVersionParse(
RvalScalarValue(evaluated_rval));
Log(LOG_LEVEL_VERBOSE, "SET common protocol_version: %s",
PROTOCOL_VERSION_STRING[config->protocol_version]);
}
/* Those are package_inventory and package_module common control body options */
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_PACKAGE_INVENTORY].lval) == 0)
{
AddDefaultInventoryToContext(ctx, RvalRlistValue(evaluated_rval));
Log(LOG_LEVEL_VERBOSE, "SET common package_inventory list");
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_PACKAGE_MODULE].lval) == 0)
{
AddDefaultPackageModuleToContext(ctx, RvalScalarValue(evaluated_rval));
Log(LOG_LEVEL_VERBOSE, "SET common package_module: %s",
RvalScalarValue(evaluated_rval));
}
if (strcmp(lval, CFG_CONTROLBODY[COMMON_CONTROL_GOALPATTERNS].lval) == 0)
{
/* Ignored */
}
RvalDestroy(evaluated_rval);
}
EvalContextStackPopFrame(ctx);
free(scope);
}
void VerifyVarPromise(EvalContext *ctx, const Promise *pp, bool allow_duplicates)
{
ConvergeVariableOptions opts = CollectConvergeVariableOptions(ctx, pp, allow_duplicates);
if (!opts.should_converge)
{
return;
}
char *scope = NULL;
if (strcmp("meta", pp->parent_promise_type->name) == 0)
{
scope = StringConcatenate(2, PromiseGetBundle(pp)->name, "_meta");
}
else
{
scope = xstrdup(PromiseGetBundle(pp)->name);
}
//More consideration needs to be given to using these
//a.transaction = GetTransactionConstraints(pp);
Attributes a = { {0} };
a.classes = GetClassDefinitionConstraints(ctx, pp);
Rval existing_var_rval;
DataType existing_var_type = DATA_TYPE_NONE;
EvalContextVariableGet(ctx, (VarRef) { NULL, scope, pp->promiser }, &existing_var_rval, &existing_var_type);
Buffer *qualified_scope = BufferNew();
int result = 0;
if (strcmp(PromiseGetNamespace(pp), "default") == 0)
{
result = BufferSet(qualified_scope, scope, strlen(scope));
if (result < 0)
{
/*
* Even though there will be no problems with memory allocation, there
* might be other problems.
*/
UnexpectedError("Problems writing to buffer");
free(scope);
BufferDestroy(&qualified_scope);
return;
}
}
else
{
if (strchr(scope, ':') == NULL)
{
result = BufferPrintf(qualified_scope, "%s:%s", PromiseGetNamespace(pp), scope);
if (result < 0)
{
/*
* Even though there will be no problems with memory allocation, there
* might be other problems.
*/
UnexpectedError("Problems writing to buffer");
free(scope);
BufferDestroy(&qualified_scope);
return;
}
}
else
{
result = BufferSet(qualified_scope, scope, strlen(scope));
if (result < 0)
{
/*
* Even though there will be no problems with memory allocation, there
* might be other problems.
*/
UnexpectedError("Problems writing to buffer");
free(scope);
BufferDestroy(&qualified_scope);
return;
}
}
}
PromiseResult promise_result;
Rval rval = opts.cp_save->rval;
if (rval.item != NULL)
{
FnCall *fp = (FnCall *) rval.item;
if (opts.cp_save->rval.type == RVAL_TYPE_FNCALL)
{
if (existing_var_type != DATA_TYPE_NONE)
{
// Already did this
free(scope);
BufferDestroy(&qualified_scope);
return;
}
FnCallResult res = FnCallEvaluate(ctx, fp, pp);
if (res.status == FNCALL_FAILURE)
{
/* We do not assign variables to failed fn calls */
RvalDestroy(res.rval);
free(scope);
BufferDestroy(&qualified_scope);
return;
}
else
{
rval = res.rval;
}
}
else
{
Buffer *conv = BufferNew();
if (strcmp(opts.cp_save->lval, "int") == 0)
{
result = BufferPrintf(conv, "%ld", IntFromString(opts.cp_save->rval.item));
if (result < 0)
{
/*
* Even though there will be no problems with memory allocation, there
* might be other problems.
*/
UnexpectedError("Problems writing to buffer");
free(scope);
BufferDestroy(&qualified_scope);
BufferDestroy(&conv);
return;
}
rval = RvalCopy((Rval) {(char *)BufferData(conv), opts.cp_save->rval.type});
}
else if (strcmp(opts.cp_save->lval, "real") == 0)
{
double real_value = 0.0;
if (DoubleFromString(opts.cp_save->rval.item, &real_value))
{
result = BufferPrintf(conv, "%lf", real_value);
}
else
{
result = BufferPrintf(conv, "(double conversion error)");
}
if (result < 0)
{
/*
* Even though there will be no problems with memory allocation, there
* might be other problems.
*/
UnexpectedError("Problems writing to buffer");
free(scope);
BufferDestroy(&conv);
BufferDestroy(&qualified_scope);
return;
}
rval = RvalCopy((Rval) {(char *)BufferData(conv), opts.cp_save->rval.type});
}
else
{
rval = RvalCopy(opts.cp_save->rval);
}
if (rval.type == RVAL_TYPE_LIST)
{
Rlist *rval_list = RvalRlistValue(rval);
RlistFlatten(ctx, &rval_list);
rval.item = rval_list;
}
BufferDestroy(&conv);
}
if (Epimenides(ctx, PromiseGetBundle(pp)->name, pp->promiser, rval, 0))
{
Log(LOG_LEVEL_ERR, "Variable \"%s\" contains itself indirectly - an unkeepable promise", pp->promiser);
exit(1);
}
else
{
/* See if the variable needs recursively expanding again */
Rval returnval = EvaluateFinalRval(ctx, BufferData(qualified_scope), rval, true, pp);
RvalDestroy(rval);
// freed before function exit
rval = returnval;
}
if (existing_var_type != DATA_TYPE_NONE)
{
if (opts.ok_redefine) /* only on second iteration, else we ignore broken promises */
{
ScopeDeleteVariable(BufferData(qualified_scope), pp->promiser);
}
else if ((THIS_AGENT_TYPE == AGENT_TYPE_COMMON) && (CompareRval(existing_var_rval, rval) == false))
{
switch (rval.type)
{
case RVAL_TYPE_SCALAR:
Log(LOG_LEVEL_VERBOSE, "Redefinition of a constant scalar \"%s\" (was %s now %s)",
pp->promiser, RvalScalarValue(existing_var_rval), RvalScalarValue(rval));
PromiseRef(LOG_LEVEL_VERBOSE, pp);
break;
case RVAL_TYPE_LIST:
{
Log(LOG_LEVEL_VERBOSE, "Redefinition of a constant list \"%s\".", pp->promiser);
Writer *w = StringWriter();
RlistWrite(w, existing_var_rval.item);
char *oldstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, "Old value: %s", oldstr);
free(oldstr);
w = StringWriter();
RlistWrite(w, rval.item);
char *newstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, " New value: %s", newstr);
free(newstr);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
}
break;
default:
break;
}
}
}
if (IsCf3VarString(pp->promiser))
{
// Unexpanded variables, we don't do anything with
RvalDestroy(rval);
free(scope);
BufferDestroy(&qualified_scope);
return;
}
if (!FullTextMatch("[a-zA-Z0-9_\200-\377.]+(\\[.+\\])*", pp->promiser))
{
Log(LOG_LEVEL_ERR, "Variable identifier contains illegal characters");
PromiseRef(LOG_LEVEL_ERR, pp);
RvalDestroy(rval);
free(scope);
BufferDestroy(&qualified_scope);
return;
}
if (opts.drop_undefined && rval.type == RVAL_TYPE_LIST)
{
for (Rlist *rp = rval.item; rp != NULL; rp = rp->next)
{
if (IsNakedVar(rp->item, '@'))
{
free(rp->item);
rp->item = xstrdup(CF_NULL_VALUE);
}
}
}
if (!EvalContextVariablePut(ctx, (VarRef) { NULL, BufferData(qualified_scope), pp->promiser }, rval, DataTypeFromString(opts.cp_save->lval)))
{
Log(LOG_LEVEL_VERBOSE, "Unable to converge %s.%s value (possibly empty or infinite regression)", BufferData(qualified_scope), pp->promiser);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
promise_result = PROMISE_RESULT_FAIL;
}
else
{
promise_result = PROMISE_RESULT_CHANGE;
}
}
else
{
Log(LOG_LEVEL_ERR, "Variable %s has no promised value", pp->promiser);
Log(LOG_LEVEL_ERR, "Rule from %s at/before line %zu", PromiseGetBundle(pp)->source_path, opts.cp_save->offset.line);
promise_result = PROMISE_RESULT_FAIL;
}
/*
* FIXME: Variable promise are exempt from normal evaluation logic still, so
* they are not pushed to evaluation stack before being evaluated. Due to
* this reason, we cannot call cfPS here to set classes, as it will error
* out with ProgrammingError.
*
* In order to support 'classes' body for variables as well, we call
* ClassAuditLog explicitly.
*/
ClassAuditLog(ctx, pp, a, promise_result);
free(scope);
BufferDestroy(&qualified_scope);
RvalDestroy(rval);
}
/* No further type checking should be necessary here, already done by CheckConstraintTypeMatch */
for (size_t i = 0; i < SeqLength(pp->conlist); i++)
{
Constraint *cp = SeqAt(pp->conlist, i);
Rval returnval;
if (ExpectedDataType(cp->lval) == DATA_TYPE_BUNDLE)
{
final = ExpandBundleReference(ctx, scopeid, cp->rval);
}
else
{
returnval = EvaluateFinalRval(ctx, scopeid, cp->rval, false, pp);
final = ExpandDanglers(ctx, scopeid, returnval, pp);
RvalDestroy(returnval);
}
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, final, cp->classes, false);
cp_copy->offset = cp->offset;
}
if (strcmp(cp->lval, "comment") == 0)
{
if (final.type != RVAL_TYPE_SCALAR)
{
char err[CF_BUFSIZE];
static bool EvalClassExpression(EvalContext *ctx, Constraint *cp, const Promise *pp)
{
assert(pp);
if (cp == NULL) // ProgrammingError ? We'll crash RSN anyway ...
{
Log(LOG_LEVEL_ERR,
"EvalClassExpression internal diagnostic discovered an ill-formed condition");
}
if (!IsDefinedClass(ctx, pp->classes))
{
return false;
}
if (IsDefinedClass(ctx, pp->promiser))
{
if (PromiseGetConstraintAsInt(ctx, "persistence", pp) == 0)
{
Log(LOG_LEVEL_VERBOSE,
" ?> Cancelling cached persistent class %s",
pp->promiser);
EvalContextHeapPersistentRemove(pp->promiser);
}
return false;
}
switch (cp->rval.type)
{
Rval rval;
FnCall *fp;
case RVAL_TYPE_FNCALL:
fp = RvalFnCallValue(cp->rval);
/* Special expansion of functions for control, best effort only: */
FnCallResult res = FnCallEvaluate(ctx, PromiseGetPolicy(pp), fp, pp);
FnCallDestroy(fp);
cp->rval = res.rval;
break;
case RVAL_TYPE_LIST:
for (Rlist *rp = cp->rval.item; rp != NULL; rp = rp->next)
{
rval = EvaluateFinalRval(ctx, PromiseGetPolicy(pp), NULL,
"this", rp->val, true, pp);
RvalDestroy(rp->val);
rp->val = rval;
}
break;
default:
rval = ExpandPrivateRval(ctx, NULL, "this", cp->rval.item, cp->rval.type);
RvalDestroy(cp->rval);
cp->rval = rval;
break;
}
if (strcmp(cp->lval, "expression") == 0)
{
return (cp->rval.type == RVAL_TYPE_SCALAR &&
IsDefinedClass(ctx, RvalScalarValue(cp->rval)));
}
if (strcmp(cp->lval, "not") == 0)
{
return (cp->rval.type == RVAL_TYPE_SCALAR &&
!IsDefinedClass(ctx, RvalScalarValue(cp->rval)));
}
/* If we get here, anything remaining on the RHS must be a clist */
if (cp->rval.type != RVAL_TYPE_LIST)
{
Log(LOG_LEVEL_ERR, "RHS of promise body attribute '%s' is not a list", cp->lval);
PromiseRef(LOG_LEVEL_ERR, pp);
return true;
}
// Class selection
if (strcmp(cp->lval, "select_class") == 0)
{
return SelectClass(ctx, cp->rval.item, pp);
}
// Class distributions
if (strcmp(cp->lval, "dist") == 0)
{
return DistributeClass(ctx, cp->rval.item, pp);
}
/* Combine with and/or/xor: */
if (strcmp(cp->lval, "or") == 0)
{
return EvalBoolCombination(ctx, cp->rval.item, c_or);
}
else if (strcmp(cp->lval, "and") == 0)
{
return EvalBoolCombination(ctx, cp->rval.item, c_and);
}
else if (strcmp(cp->lval, "xor") == 0)
{
return EvalBoolCombination(ctx, cp->rval.item, c_xor);
}
return false;
}
int NewPromiseProposals()
{ struct Rlist *rp,*sl;
struct stat sb;
int result = false;
char filename[CF_MAXVARSIZE];
if (MINUSF)
{
snprintf(filename,CF_MAXVARSIZE,"%s/state/validated_%s",CFWORKDIR,CanonifyName(VINPUTFILE));
MapName(filename);
}
else
{
snprintf(filename,CF_MAXVARSIZE,"%s/masterfiles/cf_promises_validated",CFWORKDIR);
MapName(filename);
}
if (stat(filename,&sb) != -1)
{
PROMISETIME = sb.st_mtime;
}
else
{
PROMISETIME = 0;
}
// sanity check
if(PROMISETIME > time(NULL))
{
CfOut(cf_inform, "", "!! Clock seems to have jumped back in time - mtime of %s is newer than current time - touching it", filename);
if(utime(filename,NULL) == -1)
{
CfOut(cf_error, "utime", "!! Could not touch %s", filename);
}
PROMISETIME = 0;
return true;
}
if (cfstat(InputLocation(VINPUTFILE),&sb) == -1)
{
CfOut(cf_verbose,"stat","There is no readable input file at %s",VINPUTFILE);
return true;
}
if (sb.st_mtime > PROMISETIME)
{
CfOut(cf_verbose,""," -> Promises seem to change");
return true;
}
// Check the directories first for speed and because non-input/data files should trigger an update
snprintf(filename,CF_MAXVARSIZE,"%s/inputs",CFWORKDIR);
MapName(filename);
if (IsNewerFileTree(filename,PROMISETIME))
{
CfOut(cf_verbose,""," -> Quick search detected file changes");
return true;
}
// Check files in case there are any abs paths
if (VINPUTLIST != NULL)
{
for (rp = VINPUTLIST; rp != NULL; rp=rp->next)
{
if (rp->type != CF_SCALAR)
{
CfOut(cf_error,"","Non file object %s in list\n",(char *)rp->item);
}
else
{
struct Rval returnval = EvaluateFinalRval("sys",rp->item,rp->type,true,NULL);
switch (returnval.rtype)
{
case CF_SCALAR:
if (cfstat(InputLocation((char *)returnval.item),&sb) == -1)
{
CfOut(cf_error,"stat","Unreadable promise proposals at %s",(char *)returnval.item);
result = true;
break;
}
if (sb.st_mtime > PROMISETIME)
{
result = true;
}
break;
case CF_LIST:
for (sl = (struct Rlist *)returnval.item; sl != NULL; sl=sl->next)
{
if (cfstat(InputLocation((char *)sl->item),&sb) == -1)
{
CfOut(cf_error,"stat","Unreadable promise proposals at %s",(char *)sl->item);
result = true;
break;
}
if (sb.st_mtime > PROMISETIME)
{
result = true;
break;
}
}
break;
}
DeleteRvalItem(returnval.item,returnval.rtype);
if (result)
{
break;
}
}
}
}
// did policy server change (used in $(sys.policy_hub))?
snprintf(filename,CF_MAXVARSIZE,"%s/policy_server.dat",CFWORKDIR);
MapName(filename);
if ((cfstat(filename,&sb) != -1) && (sb.st_mtime > PROMISETIME))
{
result = true;
}
return result | ALWAYS_VALIDATE;
}
static void CheckControlPromises(char *scope,char *agent,struct Constraint *controllist)
{ struct Constraint *cp;
struct BodySyntax *bp = NULL;
struct Rlist *rp;
int i = 0;
struct Rval returnval;
char rettype;
void *retval;
Debug("CheckControlPromises(%s)\n",agent);
for (i = 0; CF_ALL_BODIES[i].bs != NULL; i++)
{
bp = CF_ALL_BODIES[i].bs;
if (strcmp(agent,CF_ALL_BODIES[i].btype) == 0)
{
break;
}
}
if (bp == NULL)
{
FatalError("Unknown agent");
}
for (cp = controllist; cp != NULL; cp=cp->next)
{
if (IsExcluded(cp->classes))
{
continue;
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_bundlesequence].lval) == 0)
{
returnval = ExpandPrivateRval(CONTEXTID,cp->rval,cp->type);
}
else
{
returnval = EvaluateFinalRval(CONTEXTID,cp->rval,cp->type,true,NULL);
}
DeleteVariable(scope,cp->lval);
if (!AddVariableHash(scope,cp->lval,returnval.item,returnval.rtype,GetControlDatatype(cp->lval,bp),cp->audit->filename,cp->lineno))
{
CfOut(cf_error,""," !! Rule from %s at/before line %d\n",cp->audit->filename,cp->lineno);
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_output_prefix].lval) == 0)
{
strncpy(VPREFIX,returnval.item,CF_MAXVARSIZE);
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_domain].lval) == 0)
{
strcpy(VDOMAIN,cp->rval);
CfOut(cf_verbose,"","SET domain = %s\n",VDOMAIN);
DeleteScalar("sys","domain");
DeleteScalar("sys","fqhost");
snprintf(VFQNAME,CF_MAXVARSIZE,"%s.%s",VUQNAME,VDOMAIN);
NewScalar("sys","fqhost",VFQNAME,cf_str);
NewScalar("sys","domain",VDOMAIN,cf_str);
DeleteClass("undefined_domain");
NewClass(VDOMAIN);
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_ignore_missing_inputs].lval) == 0)
{
CfOut(cf_verbose,"","SET ignore_missing_inputs %s\n",cp->rval);
IGNORE_MISSING_INPUTS = GetBoolean(cp->rval);
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_ignore_missing_bundles].lval) == 0)
{
CfOut(cf_verbose,"","SET ignore_missing_bundles %s\n",cp->rval);
IGNORE_MISSING_BUNDLES = GetBoolean(cp->rval);
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_goalpatterns].lval) == 0)
{
GOALS = NULL;
for (rp = (struct Rlist *)returnval.item; rp != NULL; rp=rp->next)
{
PrependRScalar(&GOALS,rp->item,CF_SCALAR);
}
CfOut(cf_verbose,"","SET goal_patterns list\n");
continue;
}
if (strcmp(cp->lval,CFG_CONTROLBODY[cfg_goalcategories].lval) == 0)
{
GOALCATEGORIES = NULL;
for (rp = (struct Rlist *)returnval.item; rp != NULL; rp=rp->next)
{
PrependRScalar(&GOALCATEGORIES,rp->item,CF_SCALAR);
}
CfOut(cf_verbose,"","SET goal_categories list\n");
continue;
}
DeleteRvalItem(returnval.item,returnval.rtype);
}
}
static int EvalClassExpression(EvalContext *ctx, Constraint *cp, const Promise *pp)
{
assert(pp);
int result_and = true;
int result_or = false;
int result_xor = 0;
int result = 0, total = 0;
char buffer[CF_MAXVARSIZE];
Rlist *rp;
if (cp == NULL) // ProgrammingError ? We'll crash RSN anyway ...
{
Log(LOG_LEVEL_ERR, "EvalClassExpression internal diagnostic discovered an ill-formed condition");
}
if (!IsDefinedClass(ctx, pp->classes))
{
return false;
}
if (IsDefinedClass(ctx, pp->promiser))
{
if (PromiseGetConstraintAsInt(ctx, "persistence", pp) == 0)
{
Log(LOG_LEVEL_VERBOSE, " ?> Cancelling cached persistent class %s", pp->promiser);
EvalContextHeapPersistentRemove(pp->promiser);
}
return false;
}
switch (cp->rval.type)
{
Rval rval;
FnCall *fp;
case RVAL_TYPE_FNCALL:
fp = RvalFnCallValue(cp->rval);
/* Special expansion of functions for control, best effort only: */
FnCallResult res = FnCallEvaluate(ctx, PromiseGetPolicy(pp), fp, pp);
FnCallDestroy(fp);
cp->rval = res.rval;
break;
case RVAL_TYPE_LIST:
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
rval = EvaluateFinalRval(ctx, PromiseGetPolicy(pp), NULL, "this", rp->val, true, pp);
RvalDestroy(rp->val);
rp->val = rval;
}
break;
default:
rval = ExpandPrivateRval(ctx, NULL, "this", cp->rval.item, cp->rval.type);
RvalDestroy(cp->rval);
cp->rval = rval;
break;
}
if (strcmp(cp->lval, "expression") == 0)
{
return (cp->rval.type == RVAL_TYPE_SCALAR &&
IsDefinedClass(ctx, RvalScalarValue(cp->rval)));
}
if (strcmp(cp->lval, "not") == 0)
{
return (cp->rval.type == RVAL_TYPE_SCALAR &&
!IsDefinedClass(ctx, RvalScalarValue(cp->rval)));
}
// Class selection
if (strcmp(cp->lval, "select_class") == 0)
{
char splay[CF_MAXVARSIZE];
int i, n;
double hash;
total = 0;
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
total++;
}
if (total == 0)
{
Log(LOG_LEVEL_ERR, "No classes to select on RHS");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
snprintf(splay, CF_MAXVARSIZE, "%s+%s+%ju", VFQNAME, VIPADDRESS, (uintmax_t)getuid());
hash = (double) StringHash(splay, 0, CF_HASHTABLESIZE);
n = (int) (total * hash / (double) CF_HASHTABLESIZE);
for (rp = (Rlist *) cp->rval.item, i = 0; rp != NULL; rp = rp->next, i++)
{
if (i == n)
{
EvalContextClassPutSoft(ctx, RlistScalarValue(rp), CONTEXT_SCOPE_NAMESPACE, "source=promise");
return true;
}
}
}
/* If we get here, anything remaining on the RHS must be a clist */
if (cp->rval.type != RVAL_TYPE_LIST)
{
Log(LOG_LEVEL_ERR, "RHS of promise body attribute '%s' is not a list", cp->lval);
PromiseRef(LOG_LEVEL_ERR, pp);
return true;
}
// Class distributions
if (strcmp(cp->lval, "dist") == 0)
{
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
result = IntFromString(RlistScalarValue(rp));
if (result < 0)
{
Log(LOG_LEVEL_ERR, "Non-positive integer in class distribution");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
total += result;
}
if (total == 0)
{
Log(LOG_LEVEL_ERR, "An empty distribution was specified on RHS");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
double fluct = drand48();
double cum = 0.0;
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
double prob = ((double) IntFromString(RlistScalarValue(rp))) / ((double) total);
cum += prob;
if (fluct < cum)
{
break;
}
}
snprintf(buffer, CF_MAXVARSIZE - 1, "%s_%s", pp->promiser, RlistScalarValue(rp));
if (strcmp(PromiseGetBundle(pp)->type, "common") == 0)
{
EvalContextClassPutSoft(ctx, buffer, CONTEXT_SCOPE_NAMESPACE, "source=promise");
}
else
{
EvalContextClassPutSoft(ctx, buffer, CONTEXT_SCOPE_BUNDLE, "source=promise");
}
return true;
}
/* and/or/xor expressions */
enum {
c_or = 0, c_and, c_xor
} logic;
if (strcmp(cp->lval, "or") == 0)
{
logic = c_or;
}
else if (strcmp(cp->lval, "and") == 0)
{
logic = c_and;
}
else if (strcmp(cp->lval, "xor") == 0)
{
logic = c_xor;
}
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
// tolerate unexpanded entries here and interpret as "class not set"
if (rp->val.type != RVAL_TYPE_SCALAR)
{
result = false;
}
else
{
result = IsDefinedClass(ctx, RlistScalarValue(rp));
}
// shortcut and and or
switch (logic)
{
case c_or:
if (result)
{
return true;
}
break;
case c_and:
if (!result)
{
return false;
}
break;
default:
break;
}
result_and = result_and && result;
result_or = result_or || result;
result_xor ^= result;
}
// Class combinations
switch (logic)
{
case c_or:
return result_or;
case c_xor:
return result_xor == 1;
case c_and:
return result_and;
}
return false;
}
PromiseResult VerifyVarPromise(EvalContext *ctx, const Promise *pp, bool allow_duplicates)
{
ConvergeVariableOptions opts = CollectConvergeVariableOptions(ctx, pp, allow_duplicates);
if (!opts.should_converge)
{
return PROMISE_RESULT_NOOP;
}
Attributes a = { {0} };
// More consideration needs to be given to using these
//a.transaction = GetTransactionConstraints(pp);
a.classes = GetClassDefinitionConstraints(ctx, pp);
VarRef *ref = VarRefParseFromBundle(pp->promiser, PromiseGetBundle(pp));
if (strcmp("meta", pp->parent_promise_type->name) == 0)
{
VarRefSetMeta(ref, true);
}
DataType existing_value_type = CF_DATA_TYPE_NONE;
const void *const existing_value =
IsExpandable(pp->promiser) ? NULL : EvalContextVariableGet(ctx, ref, &existing_value_type);
PromiseResult result = PROMISE_RESULT_NOOP;
Rval rval = opts.cp_save->rval;
if (rval.item != NULL)
{
DataType data_type = DataTypeFromString(opts.cp_save->lval);
if (opts.cp_save->rval.type == RVAL_TYPE_FNCALL)
{
FnCall *fp = RvalFnCallValue(rval);
const FnCallType *fn = FnCallTypeGet(fp->name);
if (!fn)
{
assert(false && "Canary: should have been caught before this point");
FatalError(ctx, "While setting variable '%s' in bundle '%s', unknown function '%s'",
pp->promiser, PromiseGetBundle(pp)->name, fp->name);
}
if (fn->dtype != DataTypeFromString(opts.cp_save->lval))
{
FatalError(ctx, "While setting variable '%s' in bundle '%s', variable declared type '%s' but function '%s' returns type '%s'",
pp->promiser, PromiseGetBundle(pp)->name, opts.cp_save->lval,
fp->name, DataTypeToString(fn->dtype));
}
if (existing_value_type != CF_DATA_TYPE_NONE)
{
// Already did this
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
FnCallResult res = FnCallEvaluate(ctx, PromiseGetPolicy(pp), fp, pp);
if (res.status == FNCALL_FAILURE)
{
/* We do not assign variables to failed fn calls */
RvalDestroy(res.rval);
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
else
{
rval = res.rval;
}
}
else
{
Buffer *conv = BufferNew();
bool malformed = false, misprint = false;
if (strcmp(opts.cp_save->lval, "int") == 0)
{
long int asint = IntFromString(opts.cp_save->rval.item);
if (asint == CF_NOINT)
{
malformed = true;
}
else if (0 > BufferPrintf(conv, "%ld", asint))
{
misprint = true;
}
else
{
rval = RvalNew(BufferData(conv), opts.cp_save->rval.type);
}
}
else if (strcmp(opts.cp_save->lval, "real") == 0)
{
double real_value;
if (!DoubleFromString(opts.cp_save->rval.item, &real_value))
{
malformed = true;
}
else if (0 > BufferPrintf(conv, "%lf", real_value))
{
misprint = true;
}
else
{
rval = RvalNew(BufferData(conv), opts.cp_save->rval.type);
}
}
else
{
rval = RvalCopy(opts.cp_save->rval);
}
BufferDestroy(conv);
if (malformed)
{
/* Arises when opts->cp_save->rval.item isn't yet expanded. */
/* Has already been logged by *FromString */
VarRefDestroy(ref);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
else if (misprint)
{
/* Even though no problems with memory allocation can
* get here, there might be other problems. */
UnexpectedError("Problems writing to buffer");
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
else if (rval.type == RVAL_TYPE_LIST)
{
Rlist *rval_list = RvalRlistValue(rval);
RlistFlatten(ctx, &rval_list);
rval.item = rval_list;
}
}
if (Epimenides(ctx, PromiseGetBundle(pp)->ns, PromiseGetBundle(pp)->name, pp->promiser, rval, 0))
{
Log(LOG_LEVEL_ERR, "Variable '%s' contains itself indirectly - an unkeepable promise", pp->promiser);
exit(EXIT_FAILURE);
}
else
{
/* See if the variable needs recursively expanding again */
Rval returnval = EvaluateFinalRval(ctx, PromiseGetPolicy(pp), ref->ns, ref->scope, rval, true, pp);
RvalDestroy(rval);
// freed before function exit
rval = returnval;
}
if (existing_value_type != CF_DATA_TYPE_NONE)
{
if (!opts.ok_redefine) /* only on second iteration, else we ignore broken promises */
{
if (THIS_AGENT_TYPE == AGENT_TYPE_COMMON &&
!CompareRval(existing_value, DataTypeToRvalType(existing_value_type),
rval.item, rval.type))
{
switch (rval.type)
{
case RVAL_TYPE_SCALAR:
Log(LOG_LEVEL_VERBOSE, "Redefinition of a constant scalar '%s', was '%s' now '%s'",
pp->promiser, (const char *)existing_value, RvalScalarValue(rval));
PromiseRef(LOG_LEVEL_VERBOSE, pp);
break;
case RVAL_TYPE_LIST:
{
Log(LOG_LEVEL_VERBOSE, "Redefinition of a constant list '%s'", pp->promiser);
Writer *w = StringWriter();
RlistWrite(w, existing_value);
char *oldstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, "Old value '%s'", oldstr);
free(oldstr);
w = StringWriter();
RlistWrite(w, rval.item);
char *newstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, " New value '%s'", newstr);
free(newstr);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
}
break;
case RVAL_TYPE_CONTAINER:
case RVAL_TYPE_FNCALL:
case RVAL_TYPE_NOPROMISEE:
break;
}
}
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
}
if (IsCf3VarString(pp->promiser))
{
// Unexpanded variables, we don't do anything with
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
if (!IsValidVariableName(pp->promiser))
{
Log(LOG_LEVEL_ERR, "Variable identifier contains illegal characters");
PromiseRef(LOG_LEVEL_ERR, pp);
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
if (rval.type == RVAL_TYPE_LIST)
{
if (opts.drop_undefined)
{
for (Rlist *rp = RvalRlistValue(rval); rp; rp = rp->next)
{
if (IsNakedVar(RlistScalarValue(rp), '@'))
{
free(rp->val.item);
rp->val.item = xstrdup(CF_NULL_VALUE);
}
}
}
for (const Rlist *rp = RvalRlistValue(rval); rp; rp = rp->next)
{
switch (rp->val.type)
{
case RVAL_TYPE_SCALAR:
break;
default:
// Cannot assign variable because value is a list containing a non-scalar item
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
}
}
if (ref->num_indices > 0)
{
if (data_type == CF_DATA_TYPE_CONTAINER)
{
char *lval_str = VarRefToString(ref, true);
Log(LOG_LEVEL_ERR, "Cannot assign a container to an indexed variable name '%s'. Should be assigned to '%s' instead",
lval_str, ref->lval);
free(lval_str);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
else
{
DataType existing_type = CF_DATA_TYPE_NONE;
VarRef *base_ref = VarRefCopyIndexless(ref);
if (EvalContextVariableGet(ctx, ref, &existing_type) && existing_type == CF_DATA_TYPE_CONTAINER)
{
char *lval_str = VarRefToString(ref, true);
char *base_ref_str = VarRefToString(base_ref, true);
Log(LOG_LEVEL_ERR, "Cannot assign value to indexed variable name '%s', because a container is already assigned to the base name '%s'",
lval_str, base_ref_str);
free(lval_str);
free(base_ref_str);
VarRefDestroy(base_ref);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
VarRefDestroy(base_ref);
}
}
DataType required_datatype = DataTypeFromString(opts.cp_save->lval);
if (rval.type != DataTypeToRvalType(required_datatype))
{
char *ref_str = VarRefToString(ref, true);
char *value_str = RvalToString(rval);
Log(LOG_LEVEL_ERR, "Variable '%s' expected a variable of type '%s', but was given incompatible value '%s'",
ref_str, DataTypeToString(required_datatype), value_str);
PromiseRef(LOG_LEVEL_ERR, pp);
free(ref_str);
free(value_str);
VarRefDestroy(ref);
RvalDestroy(rval);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
if (!EvalContextVariablePut(ctx, ref, rval.item, required_datatype, "source=promise"))
{
Log(LOG_LEVEL_VERBOSE,
"Unable to converge %s.%s value (possibly empty or infinite regression)",
ref->scope, pp->promiser);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
else
{
Rlist *promise_meta = PromiseGetConstraintAsList(ctx, "meta", pp);
if (promise_meta)
{
StringSet *class_meta = EvalContextVariableTags(ctx, ref);
Buffer *print;
for (const Rlist *rp = promise_meta; rp; rp = rp->next)
{
StringSetAdd(class_meta, xstrdup(RlistScalarValue(rp)));
print = StringSetToBuffer(class_meta, ',');
Log(LOG_LEVEL_DEBUG,
"Added tag %s to class %s, tags now [%s]",
RlistScalarValue(rp), pp->promiser, BufferData(print));
BufferDestroy(print);
}
}
}
}
else
{
Log(LOG_LEVEL_ERR, "Variable %s has no promised value", pp->promiser);
Log(LOG_LEVEL_ERR, "Rule from %s at/before line %llu",
PromiseGetBundle(pp)->source_path,
(unsigned long long)opts.cp_save->offset.line);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
/*
* FIXME: Variable promise are exempt from normal evaluation logic still, so
* they are not pushed to evaluation stack before being evaluated. Due to
* this reason, we cannot call cfPS here to set classes, as it will error
* out with ProgrammingError.
*
* In order to support 'classes' body for variables as well, we call
* ClassAuditLog explicitly.
*/
ClassAuditLog(ctx, pp, a, result);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
pcopy->org_pp = pp->org_pp;
/* No further type checking should be necessary here, already done by CheckConstraintTypeMatch */
for (size_t i = 0; i < SeqLength(pp->conlist); i++)
{
Constraint *cp = SeqAt(pp->conlist, i);
Rval final;
if (ExpectedDataType(cp->lval) == CF_DATA_TYPE_BUNDLE)
{
final = ExpandBundleReference(ctx, NULL, "this", cp->rval);
}
else
{
Rval returnval = EvaluateFinalRval(ctx, PromiseGetPolicy(pp), NULL, "this", cp->rval, false, pp);
final = ExpandDanglers(ctx, NULL, "this", returnval, pp);
RvalDestroy(returnval);
}
bool kill_final = true;
if (IsDefinedClass(ctx, cp->classes))
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, final, false);
cp_copy->offset = cp->offset;
kill_final = false;
}
if (strcmp(cp->lval, "comment") == 0)
{
if (final.type != RVAL_TYPE_SCALAR)
static int EvalClassExpression(EvalContext *ctx, Constraint *cp, Promise *pp)
{
int result_and = true;
int result_or = false;
int result_xor = 0;
int result = 0, total = 0;
char buffer[CF_MAXVARSIZE];
Rlist *rp;
FnCall *fp;
Rval rval;
if (cp == NULL)
{
Log(LOG_LEVEL_ERR, "EvalClassExpression internal diagnostic discovered an ill-formed condition");
}
if (!IsDefinedClass(ctx, pp->classes, PromiseGetNamespace(pp)))
{
return false;
}
if (EvalContextPromiseIsDone(ctx, pp))
{
return false;
}
if (IsDefinedClass(ctx, pp->promiser, PromiseGetNamespace(pp)))
{
if (PromiseGetConstraintAsInt(ctx, "persistence", pp) == 0)
{
Log(LOG_LEVEL_VERBOSE, " ?> Cancelling cached persistent class %s", pp->promiser);
EvalContextHeapPersistentRemove(pp->promiser);
}
return false;
}
switch (cp->rval.type)
{
case RVAL_TYPE_FNCALL:
fp = (FnCall *) cp->rval.item; /* Special expansion of functions for control, best effort only */
FnCallResult res = FnCallEvaluate(ctx, fp, pp);
FnCallDestroy(fp);
cp->rval = res.rval;
break;
case RVAL_TYPE_LIST:
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
rval = EvaluateFinalRval(ctx, "this", (Rval) {rp->item, rp->type}, true, pp);
RvalDestroy((Rval) {rp->item, rp->type});
rp->item = rval.item;
rp->type = rval.type;
}
break;
default:
rval = ExpandPrivateRval(ctx, "this", cp->rval);
RvalDestroy(cp->rval);
cp->rval = rval;
break;
}
if (strcmp(cp->lval, "expression") == 0)
{
if (cp->rval.type != RVAL_TYPE_SCALAR)
{
return false;
}
if (IsDefinedClass(ctx, (char *) cp->rval.item, PromiseGetNamespace(pp)))
{
return true;
}
else
{
return false;
}
}
if (strcmp(cp->lval, "not") == 0)
{
if (cp->rval.type != RVAL_TYPE_SCALAR)
{
return false;
}
if (IsDefinedClass(ctx, (char *) cp->rval.item, PromiseGetNamespace(pp)))
{
return false;
}
else
{
return true;
}
}
// Class selection
if (strcmp(cp->lval, "select_class") == 0)
{
char splay[CF_MAXVARSIZE];
int i, n;
double hash;
total = 0;
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
total++;
}
if (total == 0)
{
Log(LOG_LEVEL_ERR, "No classes to select on RHS");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
snprintf(splay, CF_MAXVARSIZE, "%s+%s+%ju", VFQNAME, VIPADDRESS, (uintmax_t)getuid());
hash = (double) OatHash(splay, CF_HASHTABLESIZE);
n = (int) (total * hash / (double) CF_HASHTABLESIZE);
for (rp = (Rlist *) cp->rval.item, i = 0; rp != NULL; rp = rp->next, i++)
{
if (i == n)
{
EvalContextHeapAddSoft(ctx, rp->item, PromiseGetNamespace(pp));
return true;
}
}
}
/* If we get here, anything remaining on the RHS must be a clist */
if (cp->rval.type != RVAL_TYPE_LIST)
{
Log(LOG_LEVEL_ERR, "RHS of promise body attribute '%s' is not a list", cp->lval);
PromiseRef(LOG_LEVEL_ERR, pp);
return true;
}
// Class distributions
if (strcmp(cp->lval, "dist") == 0)
{
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
result = IntFromString(rp->item);
if (result < 0)
{
Log(LOG_LEVEL_ERR, "Non-positive integer in class distribution");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
total += result;
}
if (total == 0)
{
Log(LOG_LEVEL_ERR, "An empty distribution was specified on RHS");
PromiseRef(LOG_LEVEL_ERR, pp);
return false;
}
double fluct = drand48();
double cum = 0.0;
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
double prob = ((double) IntFromString(rp->item)) / ((double) total);
cum += prob;
if (fluct < cum)
{
break;
}
}
snprintf(buffer, CF_MAXVARSIZE - 1, "%s_%s", pp->promiser, (char *) rp->item);
/* FIXME: figure why explicit mark and get rid of it */
EvalContextMarkPromiseDone(ctx, pp);
if (strcmp(PromiseGetBundle(pp)->type, "common") == 0)
{
EvalContextHeapAddSoft(ctx, buffer, PromiseGetNamespace(pp));
}
else
{
EvalContextStackFrameAddSoft(ctx, buffer);
}
return true;
}
/* and/or/xor expressions */
for (rp = (Rlist *) cp->rval.item; rp != NULL; rp = rp->next)
{
if (rp->type != RVAL_TYPE_SCALAR)
{
return false;
}
result = IsDefinedClass(ctx, (char *) (rp->item), PromiseGetNamespace(pp));
result_and = result_and && result;
result_or = result_or || result;
result_xor ^= result;
}
// Class combinations
if (strcmp(cp->lval, "or") == 0)
{
return result_or;
}
if (strcmp(cp->lval, "xor") == 0)
{
return (result_xor == 1) ? true : false;
}
if (strcmp(cp->lval, "and") == 0)
{
return result_and;
}
return false;
}
static int EvalClassExpression(struct Constraint *cp,struct Promise *pp)
{ int result_and = true;
int result_or = false;
int result_xor = 0;
int result = 0,total = 0;
char buffer[CF_MAXVARSIZE];
struct Rlist *rp;
double prob,cum = 0,fluct;
struct Rval newret;
struct FnCall *fp;
if (cp == NULL)
{
CfOut(cf_error,""," !! EvalClassExpression internal diagnostic discovered an ill-formed condition");
}
if (!IsDefinedClass(pp->classes))
{
return false;
}
if (pp->done)
{
return false;
}
if (IsDefinedClass(pp->promiser))
{
return false;
}
switch (cp->type)
{
case CF_FNCALL:
fp = (struct FnCall *)cp->rval; /* Special expansion of functions for control, best effort only */
newret = EvaluateFunctionCall(fp,pp);
DeleteFnCall(fp);
cp->rval = newret.item;
cp->type = newret.rtype;
break;
case CF_LIST:
for (rp = (struct Rlist *)cp->rval; rp != NULL; rp = rp->next)
{
newret = EvaluateFinalRval("this",rp->item,rp->type,true,pp);
DeleteRvalItem(rp->item,rp->type);
rp->item = newret.item;
rp->type = newret.rtype;
}
break;
default:
newret = ExpandPrivateRval("this",cp->rval,cp->type);
DeleteRvalItem(cp->rval,cp->type);
cp->rval = newret.item;
cp->type = newret.rtype;
break;
}
if (strcmp(cp->lval,"expression") == 0)
{
if (cp->type != CF_SCALAR)
{
return false;
}
if (IsDefinedClass((char *)cp->rval))
{
return true;
}
else
{
return false;
}
}
if (strcmp(cp->lval,"not") == 0)
{
if (cp->type != CF_SCALAR)
{
return false;
}
if (IsDefinedClass((char *)cp->rval))
{
return false;
}
else
{
return true;
}
}
// Class selection
if (strcmp(cp->lval,"select_class") == 0)
{
char splay[CF_MAXVARSIZE];
int i,n;
double hash;
total = 0;
for (rp = (struct Rlist *)cp->rval; rp != NULL; rp = rp->next)
{
total++;
}
if (total == 0)
{
CfOut(cf_error,""," !! No classes to select on RHS");
PromiseRef(cf_error,pp);
return false;
}
snprintf(splay,CF_MAXVARSIZE,"%s+%s+%d",VFQNAME,VIPADDRESS,getuid());
hash = (double)GetHash(splay);
n = (int)(total*hash/(double)CF_HASHTABLESIZE);
for (rp = (struct Rlist *)cp->rval,i = 0; rp != NULL; rp = rp->next,i++)
{
if (i == n)
{
NewClass(rp->item);
return true;
}
}
}
// Class distributions
if (strcmp(cp->lval,"dist") == 0)
{
for (rp = (struct Rlist *)cp->rval; rp != NULL; rp = rp->next)
{
result = Str2Int(rp->item);
if (result < 0)
{
CfOut(cf_error,""," !! Non-positive integer in class distribution");
PromiseRef(cf_error,pp);
return false;
}
total += result;
}
if (total == 0)
{
CfOut(cf_error,""," !! An empty distribution was specified on RHS");
PromiseRef(cf_error,pp);
return false;
}
}
fluct = drand48(); /* Get random number 0-1 */
cum = 0.0;
/* If we get here, anything remaining on the RHS must be a clist */
if (cp->type != CF_LIST)
{
CfOut(cf_error,""," !! RHS of promise body attribute \"%s\" is not a list\n",cp->lval);
PromiseRef(cf_error,pp);
return true;
}
for (rp = (struct Rlist *)cp->rval; rp != NULL; rp = rp->next)
{
if (rp->type != CF_SCALAR)
{
return false;
}
result = IsDefinedClass((char *)(rp->item));
result_and = result_and && result;
result_or = result_or || result;
result_xor ^= result;
if (total > 0) // dist class
{
prob = ((double)Str2Int(rp->item))/((double)total);
cum += prob;
if ((fluct < cum) || rp->next == NULL)
{
snprintf(buffer,CF_MAXVARSIZE-1,"%s_%s",pp->promiser,rp->item);
*(pp->donep) = true;
if (strcmp(pp->bundletype,"common") == 0)
{
NewClass(buffer);
}
else
{
NewBundleClass(buffer,pp->bundle);
}
Debug(" ?? \'Strategy\' distribution class interval -> %s\n",buffer);
return true;
}
}
}
// Class combinations
if (strcmp(cp->lval,"or") == 0)
{
return result_or;
}
if (strcmp(cp->lval,"xor") == 0)
{
return (result_xor == 1) ? true : false;
}
if (strcmp(cp->lval,"and") == 0)
{
return result_and;
}
return false;
}