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 CopyLocalizedReferencesToBundleScope(EvalContext *ctx,
const Bundle *bundle,
const Rlist *ref_names)
{
for (const Rlist *rp = ref_names; rp != NULL; rp = rp->next)
{
const char *mangled = RlistScalarValue(rp);
char *demangled = xstrdup(mangled);
DeMangleVarRefString(demangled, strlen(demangled));
if (strchr(RlistScalarValue(rp), CF_MAPPEDLIST))
{
VarRef *demangled_ref = VarRefParseFromBundle(demangled, bundle);
DataType value_type;
const void *value = EvalContextVariableGet(ctx, demangled_ref, &value_type);
if (!value)
{
ProgrammingError("Couldn't find extracted variable '%s'", mangled);
}
VarRef *mangled_ref = VarRefParseFromBundle(mangled, bundle);
switch (DataTypeToRvalType(value_type))
{
case RVAL_TYPE_LIST:
{
Rlist *list = RlistCopy(value);
RlistFlatten(ctx, &list);
EvalContextVariablePut(ctx, mangled_ref, list, value_type, "source=agent");
RlistDestroy(list);
}
break;
case RVAL_TYPE_CONTAINER:
case RVAL_TYPE_SCALAR:
EvalContextVariablePut(ctx, mangled_ref, value, value_type, "source=agent");
break;
case RVAL_TYPE_FNCALL:
case RVAL_TYPE_NOPROMISEE:
ProgrammingError("Illegal rval type in switch %d", DataTypeToRvalType(value_type));
}
VarRefDestroy(mangled_ref);
VarRefDestroy(demangled_ref);
}
free(demangled);
}
}
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;
}
Promise *DeRefCopyPromise(EvalContext *ctx, const Promise *pp)
{
Promise *pcopy;
Rval returnval;
pcopy = xcalloc(1, sizeof(Promise));
if (pp->promiser)
{
pcopy->promiser = xstrdup(pp->promiser);
}
if (pp->promisee.item)
{
pcopy->promisee = RvalCopy(pp->promisee);
if (pcopy->promisee.type == RVAL_TYPE_LIST)
{
Rlist *rval_list = RvalRlistValue(pcopy->promisee);
RlistFlatten(ctx, &rval_list);
pcopy->promisee.item = rval_list;
}
}
if (pp->classes)
{
pcopy->classes = xstrdup(pp->classes);
}
/* FIXME: may it happen? */
if ((pp->promisee.item != NULL && pcopy->promisee.item == NULL))
{
ProgrammingError("Unable to copy promise");
}
pcopy->parent_promise_type = pp->parent_promise_type;
pcopy->offset.line = pp->offset.line;
pcopy->comment = pp->comment ? xstrdup(pp->comment) : NULL;
pcopy->has_subbundles = pp->has_subbundles;
pcopy->conlist = SeqNew(10, ConstraintDestroy);
pcopy->org_pp = pp->org_pp;
pcopy->offset = pp->offset;
/* 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);
Body *bp = NULL;
FnCall *fp = NULL;
/* A body template reference could look like a scalar or fn to the parser w/w () */
const Policy *policy = PolicyFromPromise(pp);
Seq *bodies = policy ? policy->bodies : NULL;
char body_ns[CF_MAXVARSIZE] = "";
char body_name[CF_MAXVARSIZE] = "";
switch (cp->rval.type)
{
case RVAL_TYPE_SCALAR:
if (cp->references_body)
{
SplitScopeName(RvalScalarValue(cp->rval), body_ns, body_name);
if (EmptyString(body_ns))
{
strncpy(body_ns, PromiseGetNamespace(pp), CF_MAXVARSIZE);
}
bp = IsBody(bodies, body_ns, body_name);
}
fp = NULL;
break;
case RVAL_TYPE_FNCALL:
fp = RvalFnCallValue(cp->rval);
SplitScopeName(fp->name, body_ns, body_name);
if (EmptyString(body_ns))
{
strncpy(body_ns, PromiseGetNamespace(pp), CF_MAXVARSIZE);
}
bp = IsBody(bodies, body_ns, body_name);
break;
default:
bp = NULL;
fp = NULL;
break;
}
/* First case is: we have a body template to expand lval = body(args), .. */
if (bp)
{
EvalContextStackPushBodyFrame(ctx, pcopy, bp, fp ? fp->args : NULL);
if (strcmp(bp->type, cp->lval) != 0)
{
Log(LOG_LEVEL_ERR,
"Body type mismatch for body reference '%s' in promise at line %zu of file '%s', '%s' does not equal '%s'",
body_name, pp->offset.line, PromiseGetBundle(pp)->source_path, bp->type, cp->lval);
}
/* Keep the referent body type as a boolean for convenience when checking later */
if (IsDefinedClass(ctx, cp->classes, PromiseGetNamespace(pcopy)))
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, (Rval) {xstrdup("true"), RVAL_TYPE_SCALAR }, false);
cp_copy->offset = cp->offset;
}
if (bp->args != NULL)
{
/* There are arguments to insert */
if (fp == NULL || fp->args == NULL)
{
Log(LOG_LEVEL_ERR, "Argument mismatch for body reference '%s' in promise at line %zu of file '%s'",
body_name, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
for (size_t k = 0; k < SeqLength(bp->conlist); k++)
{
Constraint *scp = SeqAt(bp->conlist, k);
returnval = ExpandPrivateRval(ctx, NULL, "body", scp->rval.item, scp->rval.type);
if (IsDefinedClass(ctx, scp->classes, PromiseGetNamespace(pcopy)))
{
Constraint *scp_copy = PromiseAppendConstraint(pcopy, scp->lval, returnval, false);
scp_copy->offset = scp->offset;
}
}
}
else
{
/* No arguments to deal with or body undeclared */
if (fp != NULL)
{
Log(LOG_LEVEL_ERR,
"An apparent body \"%s()\" was undeclared or could have incorrect args, but used in a promise near line %zu of %s (possible unquoted literal value)",
body_name, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
else
{
for (size_t k = 0; k < SeqLength(bp->conlist); k++)
{
Constraint *scp = SeqAt(bp->conlist, k);
Rval newrv = RvalCopy(scp->rval);
if (newrv.type == RVAL_TYPE_LIST)
{
Rlist *new_list = RvalRlistValue(newrv);
RlistFlatten(ctx, &new_list);
newrv.item = new_list;
}
if (IsDefinedClass(ctx, scp->classes, PromiseGetNamespace(pcopy)))
{
Constraint *scp_copy = PromiseAppendConstraint(pcopy, scp->lval, newrv, false);
scp_copy->offset = scp->offset;
}
}
}
}
EvalContextStackPopFrame(ctx);
}
else
{
const Policy *policy = PolicyFromPromise(pp);
if (cp->references_body && !IsBundle(policy->bundles, EmptyString(body_ns) ? NULL : body_ns, body_name))
{
Log(LOG_LEVEL_ERR,
"Apparent body \"%s()\" was undeclared, but used in a promise near line %zu of %s (possible unquoted literal value)",
body_name, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
Rval newrv = RvalCopy(cp->rval);
if (newrv.type == RVAL_TYPE_LIST)
{
Rlist *new_list = RvalRlistValue(newrv);
RlistFlatten(ctx, &new_list);
newrv.item = new_list;
}
if (IsDefinedClass(ctx, cp->classes, PromiseGetNamespace(pcopy)))
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, newrv, false);
cp_copy->offset = cp->offset;
}
}
}
return pcopy;
}
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);
}
Promise *DeRefCopyPromise(EvalContext *ctx, const Promise *pp)
{
Promise *pcopy;
Rval returnval;
if (pp->promisee.item)
{
CfDebug("CopyPromise(%s->", pp->promiser);
if (DEBUG)
{
RvalShow(stdout, pp->promisee);
}
CfDebug("\n");
}
else
{
CfDebug("CopyPromise(%s->)\n", pp->promiser);
}
pcopy = xcalloc(1, sizeof(Promise));
if (pp->promiser)
{
pcopy->promiser = xstrdup(pp->promiser);
}
if (pp->promisee.item)
{
pcopy->promisee = RvalCopy(pp->promisee);
if (pcopy->promisee.type == RVAL_TYPE_LIST)
{
Rlist *rval_list = RvalRlistValue(pcopy->promisee);
RlistFlatten(ctx, &rval_list);
pcopy->promisee.item = rval_list;
}
}
if (pp->classes)
{
pcopy->classes = xstrdup(pp->classes);
}
/* FIXME: may it happen? */
if ((pp->promisee.item != NULL && pcopy->promisee.item == NULL))
{
ProgrammingError("Unable to copy promise");
}
pcopy->parent_promise_type = pp->parent_promise_type;
pcopy->offset.line = pp->offset.line;
pcopy->comment = pp->comment ? xstrdup(pp->comment) : NULL;
pcopy->has_subbundles = pp->has_subbundles;
pcopy->conlist = SeqNew(10, ConstraintDestroy);
pcopy->org_pp = pp->org_pp;
pcopy->offset = pp->offset;
CfDebug("Copying promise constraints\n\n");
/* 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);
Body *bp = NULL;
FnCall *fp = NULL;
char *bodyname = NULL;
/* A body template reference could look like a scalar or fn to the parser w/w () */
Policy *policy = PolicyFromPromise(pp);
Seq *bodies = policy ? policy->bodies : NULL;
switch (cp->rval.type)
{
case RVAL_TYPE_SCALAR:
bodyname = (char *) cp->rval.item;
if (cp->references_body)
{
bp = IsBody(bodies, PromiseGetNamespace(pp), bodyname);
}
fp = NULL;
break;
case RVAL_TYPE_FNCALL:
fp = (FnCall *) cp->rval.item;
bodyname = fp->name;
bp = IsBody(bodies, PromiseGetNamespace(pp), bodyname);
break;
default:
bp = NULL;
fp = NULL;
bodyname = NULL;
break;
}
/* First case is: we have a body template to expand lval = body(args), .. */
if (bp)
{
EvalContextStackPushBodyFrame(ctx, bp);
if (strcmp(bp->type, cp->lval) != 0)
{
Log(LOG_LEVEL_ERR,
"Body type mismatch for body reference \"%s\" in promise at line %zu of %s (%s != %s)\n",
bodyname, pp->offset.line, PromiseGetBundle(pp)->source_path, bp->type, cp->lval);
}
/* Keep the referent body type as a boolean for convenience when checking later */
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, (Rval) {xstrdup("true"), RVAL_TYPE_SCALAR }, cp->classes, false);
cp_copy->offset = cp->offset;
}
CfDebug("Handling body-lval \"%s\"\n", cp->lval);
if (bp->args != NULL)
{
/* There are arguments to insert */
if (fp == NULL || fp->args == NULL)
{
Log(LOG_LEVEL_ERR, "Argument mismatch for body reference \"%s\" in promise at line %zu of %s",
bodyname, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
if (fp && bp && fp->args && bp->args && !ScopeMapBodyArgs(ctx, "body", fp->args, bp->args))
{
Log(LOG_LEVEL_ERR,
"Number of arguments does not match for body reference \"%s\" in promise at line %zu of %s\n",
bodyname, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
for (size_t k = 0; k < SeqLength(bp->conlist); k++)
{
Constraint *scp = SeqAt(bp->conlist, k);
CfDebug("Doing arg-mapped sublval = %s (promises.c)\n", scp->lval);
returnval = ExpandPrivateRval(ctx, "body", scp->rval);
{
Constraint *scp_copy = PromiseAppendConstraint(pcopy, scp->lval, returnval, scp->classes, false);
scp_copy->offset = scp->offset;
}
}
ScopeClear("body");
}
else
{
/* No arguments to deal with or body undeclared */
if (fp != NULL)
{
Log(LOG_LEVEL_ERR,
"An apparent body \"%s()\" was undeclared or could have incorrect args, but used in a promise near line %zu of %s (possible unquoted literal value)",
bodyname, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
else
{
for (size_t k = 0; k < SeqLength(bp->conlist); k++)
{
Constraint *scp = SeqAt(bp->conlist, k);
CfDebug("Doing sublval = %s (promises.c)\n", scp->lval);
Rval newrv = RvalCopy(scp->rval);
if (newrv.type == RVAL_TYPE_LIST)
{
Rlist *new_list = RvalRlistValue(newrv);
RlistFlatten(ctx, &new_list);
newrv.item = new_list;
}
{
Constraint *scp_copy = PromiseAppendConstraint(pcopy, scp->lval, newrv, scp->classes, false);
scp_copy->offset = scp->offset;
}
}
}
}
EvalContextStackPopFrame(ctx);
}
else
{
Policy *policy = PolicyFromPromise(pp);
if (cp->references_body && !IsBundle(policy->bundles, bodyname))
{
Log(LOG_LEVEL_ERR,
"Apparent body \"%s()\" was undeclared, but used in a promise near line %zu of %s (possible unquoted literal value)",
bodyname, pp->offset.line, PromiseGetBundle(pp)->source_path);
}
Rval newrv = RvalCopy(cp->rval);
if (newrv.type == RVAL_TYPE_LIST)
{
Rlist *new_list = RvalRlistValue(newrv);
RlistFlatten(ctx, &new_list);
newrv.item = new_list;
}
{
Constraint *cp_copy = PromiseAppendConstraint(pcopy, cp->lval, newrv, cp->classes, false);
cp_copy->offset = cp->offset;
}
}
}
return pcopy;
}
