static SyntaxTypeMatch CheckParseOpts(const char *lval, const char *s, const char *range)
{
Item *split;
/* List/menu types are separated by comma str "a,b,c,..." */
CfDebug("\nCheckParseOpts(%s => %s/%s)\n", lval, s, range);
if (IsNakedVar(s, '@') || IsNakedVar(s, '$'))
{
return SYNTAX_TYPE_MATCH_ERROR_UNEXPANDED;
}
split = SplitString(range, ',');
if (!IsItemIn(split, s))
{
DeleteItemList(split);
return SYNTAX_TYPE_MATCH_ERROR_OPTS_OUT_OF_RANGE;
}
DeleteItemList(split);
return SYNTAX_TYPE_MATCH_OK;
}
static int CheckParseString(char *lval, char *s, const char *range)
{
char output[CF_BUFSIZE];
CfDebug("\nCheckParseString(%s => %s/%s)\n", lval, s, range);
if (s == NULL)
{
return true;
}
if (strlen(range) == 0)
{
return true;
}
if (IsNakedVar(s, '@') || IsNakedVar(s, '$'))
{
CfDebug("Validation: Unable to verify variable expansion of %s at this stage\n", s);
return false;
}
/* Deal with complex strings as special cases */
if (strcmp(lval, "mode") == 0 || strcmp(lval, "search_mode") == 0)
{
mode_t plus, minus;
if (!ParseModeString(s, &plus, &minus))
{
snprintf(output, CF_BUFSIZE, "Error parsing Unix permission string %s)", s);
ReportError(output);
return false;
}
}
if (FullTextMatch(range, s))
{
return true;
}
if (IsCf3VarString(s))
{
CfDebug("Validation: Unable to verify syntax of %s due to variable expansion at this stage\n", s);
}
else
{
snprintf(output, CF_BUFSIZE,
"Scalar item in %s => { %s } in rvalue is out of bounds (value should match pattern %s)", lval, s,
range);
ReportError(output);
return false;
}
return true;
}
static SyntaxTypeMatch CheckParseString(const char *lval, const char *s, const char *range)
{
if (s == NULL)
{
return SYNTAX_TYPE_MATCH_OK;
}
if (strlen(range) == 0)
{
return SYNTAX_TYPE_MATCH_OK;
}
if (IsNakedVar(s, '@') || IsNakedVar(s, '$'))
{
return SYNTAX_TYPE_MATCH_ERROR_UNEXPANDED;
}
/* Deal with complex strings as special cases */
if (strcmp(lval, "mode") == 0 || strcmp(lval, "search_mode") == 0)
{
mode_t plus, minus;
if (!ParseModeString(s, &plus, &minus))
{
return SYNTAX_TYPE_MATCH_ERROR_STRING_UNIX_PERMISSION;
}
}
/* FIXME: review this strcmp. Moved out from StringMatch */
if (!strcmp(range, s) || StringMatchFull(range, s))
{
return SYNTAX_TYPE_MATCH_OK;
}
if (IsCf3VarString(s))
{
return SYNTAX_TYPE_MATCH_ERROR_UNEXPANDED;
}
else if ('\0' == s[0])
{
return SYNTAX_TYPE_MATCH_ERROR_EMPTY_SCALAR_OUT_OF_RANGE;
}
else if (!strcmp(range, CF_ABSPATHRANGE))
{
return SYNTAX_TYPE_MATCH_ERROR_ABSOLUTE_PATH;
}
else
{
return SYNTAX_TYPE_MATCH_ERROR_SCALAR_OUT_OF_RANGE;
}
return SYNTAX_TYPE_MATCH_OK;
}
Rlist *ExpandList(EvalContext *ctx, const char *ns, const char *scope, const Rlist *list, int expandnaked)
{
Rlist *start = NULL;
Rval returnval;
for (const Rlist *rp = list; rp != NULL; rp = rp->next)
{
if (!expandnaked && (rp->val.type == RVAL_TYPE_SCALAR) && IsNakedVar(RlistScalarValue(rp), '@'))
{
returnval = RvalNew(RlistScalarValue(rp), RVAL_TYPE_SCALAR);
}
else if ((rp->val.type == RVAL_TYPE_SCALAR) && IsNakedVar(RlistScalarValue(rp), '@'))
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, RlistScalarValue(rp));
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParseFromScope(naked, scope);
DataType value_type = DATA_TYPE_NONE;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
if (value)
{
returnval = ExpandPrivateRval(ctx, ns, scope, value, DataTypeToRvalType(value_type));
}
else
{
returnval = ExpandPrivateRval(ctx, ns, scope, rp->val.item, rp->val.type);
}
VarRefDestroy(ref);
}
else
{
returnval = ExpandPrivateRval(ctx, ns, scope, rp->val.item, rp->val.type);
}
}
else
{
returnval = ExpandPrivateRval(ctx, ns, scope, rp->val.item, rp->val.type);
}
RlistAppend(&start, returnval.item, returnval.type);
RvalDestroy(returnval);
}
return start;
}
static Rval ExpandListEntry(EvalContext *ctx,
const char *ns, const char *scope,
int expandnaked, Rval entry)
{
if (entry.type == RVAL_TYPE_SCALAR &&
IsNakedVar(entry.item, '@'))
{
if (expandnaked)
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, entry.item);
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParseFromScope(naked, scope);
DataType value_type = CF_DATA_TYPE_NONE;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value)
{
return ExpandPrivateRval(ctx, ns, scope, value,
DataTypeToRvalType(value_type));
}
}
}
else
{
return RvalNew(entry.item, RVAL_TYPE_SCALAR);
}
}
return ExpandPrivateRval(ctx, ns, scope, entry.item, entry.type);
}
static SyntaxTypeMatch CheckParseString(const char *lval, const char *s, const char *range)
{
CfDebug("\nCheckParseString(%s => %s/%s)\n", lval, s, range);
if (s == NULL)
{
return SYNTAX_TYPE_MATCH_OK;
}
if (strlen(range) == 0)
{
return SYNTAX_TYPE_MATCH_OK;
}
if (IsNakedVar(s, '@') || IsNakedVar(s, '$'))
{
return SYNTAX_TYPE_MATCH_ERROR_UNEXPANDED;
}
/* Deal with complex strings as special cases */
if (strcmp(lval, "mode") == 0 || strcmp(lval, "search_mode") == 0)
{
mode_t plus, minus;
if (!ParseModeString(s, &plus, &minus))
{
return SYNTAX_TYPE_MATCH_ERROR_STRING_UNIX_PERMISSION;
}
}
if (FullTextMatch(range, s))
{
return SYNTAX_TYPE_MATCH_OK;
}
if (IsCf3VarString(s))
{
return SYNTAX_TYPE_MATCH_ERROR_UNEXPANDED;
}
else
{
return SYNTAX_TYPE_MATCH_ERROR_SCALAR_OUT_OF_RANGE;
}
return SYNTAX_TYPE_MATCH_OK;
}
static void CheckParseOpts(char *lval, char *s, const char *range)
{
Item *split;
int err = false;
char output[CF_BUFSIZE];
/* List/menu types are separated by comma str "a,b,c,..." */
CfDebug("\nCheckParseOpts(%s => %s/%s)\n", lval, s, range);
if (s == NULL)
{
return;
}
if (IsNakedVar(s, '@') || IsNakedVar(s, '$'))
{
CfDebug("Validation: Unable to verify variable expansion of %s at this stage\n", s);
return;
}
split = SplitString(range, ',');
if (!IsItemIn(split, s))
{
snprintf(output, CF_BUFSIZE,
"Selection on rhs of lval \'%s\' given as \'%s\' is out of bounds, should be in [%s]", lval, s, range);
ReportError(output);
err = true;
}
DeleteItemList(split);
if (!err)
{
CfDebug("CheckParseOpts - syntax verified\n\n");
}
}
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
for (Rlist *rp = *list; rp != NULL;)
{
if (rp->val.type != RVAL_TYPE_SCALAR)
{
rp = rp->next;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(RlistScalarValue(rp), '@'))
{
GetNaked(naked, RlistScalarValue(rp));
if (!IsExpandable(naked))
{
Rval rv;
VarRef *ref = VarRefParse(naked);
bool var_found = EvalContextVariableGet(ctx, ref, &rv, NULL);
VarRefDestroy(ref);
if (var_found)
{
switch (rv.type)
{
case RVAL_TYPE_LIST:
for (const Rlist *srp = rv.item; srp != NULL; srp = srp->next)
{
RlistAppendRval(list, RvalCopy(srp->val));
}
Rlist *next = rp->next;
RlistDestroyEntry(list, rp);
rp = next;
continue;
default:
ProgrammingError("List variable does not resolve to a list");
RlistAppendRval(list, RvalCopy(rp->val));
break;
}
}
}
}
rp = rp->next;
}
}
static Rval ExpandListEntry(EvalContext *ctx,
const char *ns, const char *scope,
int expandnaked, Rval entry)
{
if (entry.type == RVAL_TYPE_SCALAR &&
IsNakedVar(entry.item, '@'))
{
if (expandnaked)
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, entry.item);
if (IsExpandable(naked))
{
char *exp = ExpandScalar(ctx, ns, scope, naked, NULL);
strlcpy(naked, exp, sizeof(naked)); /* TODO err */
free(exp);
}
/* Check again, it might have changed. */
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParseFromScope(naked, scope);
DataType value_type;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value_type != CF_DATA_TYPE_NONE) /* variable found? */
{
return ExpandPrivateRval(ctx, ns, scope, value,
DataTypeToRvalType(value_type));
}
}
}
else
{
return RvalNew(entry.item, RVAL_TYPE_SCALAR);
}
}
return ExpandPrivateRval(ctx, ns, scope, entry.item, entry.type);
}
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
for (Rlist *rp = *list; rp != NULL;)
{
if (rp->type != RVAL_TYPE_SCALAR)
{
rp = rp->next;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(rp->item, '@'))
{
GetNaked(naked, rp->item);
Rval rv;
if (EvalContextVariableGet(ctx, (VarRef) { NULL, ScopeGetCurrent()->scope, naked }, &rv, NULL))
{
switch (rv.type)
{
case RVAL_TYPE_LIST:
for (const Rlist *srp = rv.item; srp != NULL; srp = srp->next)
{
RlistAppend(list, srp->item, srp->type);
}
Rlist *next = rp->next;
RlistDestroyEntry(list, rp);
rp = next;
continue;
default:
ProgrammingError("List variable does not resolve to a list");
RlistAppend(list, rp->item, rp->type);
break;
}
}
}
rp = rp->next;
}
}
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
Rlist *prev = NULL, *next;
for (Rlist *rp = *list; rp != NULL; rp = next)
{
next = rp->next;
if (rp->val.type != RVAL_TYPE_SCALAR)
{
prev = rp;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(RlistScalarValue(rp), '@'))
{
GetNaked(naked, RlistScalarValue(rp));
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParse(naked);
DataType value_type = CF_DATA_TYPE_NONE;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value)
{
switch (DataTypeToRvalType(value_type))
{
case RVAL_TYPE_LIST:
{
RlistDestroyEntry(list, rp);
for (const Rlist *srp = value; srp != NULL; srp = srp->next)
{
Rlist *nrp = xmalloc(sizeof(Rlist));
nrp->val = RvalCopy(srp->val);
nrp->next = next;
if (prev)
{
prev->next = nrp;
}
else
{
*list = nrp;
}
prev = nrp;
}
}
continue;
default:
Log(LOG_LEVEL_WARNING, "Attempted to dereference variable '%s' using @ but variable did not resolve to a list",
RlistScalarValue(rp));
break;
}
}
}
}
prev = rp;
}
}
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;
}
void ScopeAugment(EvalContext *ctx, const Bundle *bp, const Rlist *arguments)
{
if (RlistLen(bp->args) != RlistLen(arguments))
{
CfOut(OUTPUT_LEVEL_ERROR, "", "While constructing scope \"%s\"\n", bp->name);
fprintf(stderr, "Formal = ");
RlistShow(stderr, bp->args);
fprintf(stderr, ", Actual = ");
RlistShow(stderr, arguments);
fprintf(stderr, "\n");
FatalError(ctx, "Augment scope, formal and actual parameter mismatch is fatal");
}
for (const Rlist *rpl = bp->args, *rpr = arguments; rpl != NULL; rpl = rpl->next, rpr = rpr->next)
{
const char *lval = rpl->item;
CfOut(OUTPUT_LEVEL_VERBOSE, "", " ? Augment scope %s with %s (%c)\n", bp->name, lval, rpr->type);
// CheckBundleParameters() already checked that there is no namespace collision
// By this stage all functions should have been expanded, so we only have scalars left
if (IsNakedVar(rpr->item, '@'))
{
DataType vtype;
char qnaked[CF_MAXVARSIZE];
char naked[CF_BUFSIZE];
GetNaked(naked, rpr->item);
if (IsQualifiedVariable(naked) && strchr(naked, CF_NS) == NULL)
{
snprintf(qnaked, CF_MAXVARSIZE, "%s%c%s", bp->ns, CF_NS, naked);
}
Rval retval;
EvalContextVariableGet(ctx, (VarRef) { NULL, bp->name, qnaked }, &retval, &vtype);
switch (vtype)
{
case DATA_TYPE_STRING_LIST:
case DATA_TYPE_INT_LIST:
case DATA_TYPE_REAL_LIST:
ScopeNewList(ctx, (VarRef) { NULL, bp->name, lval }, RvalCopy((Rval) { retval.item, RVAL_TYPE_LIST}).item, DATA_TYPE_STRING_LIST);
break;
default:
CfOut(OUTPUT_LEVEL_ERROR, "", " !! List parameter \"%s\" not found while constructing scope \"%s\" - use @(scope.variable) in calling reference", qnaked, bp->name);
ScopeNewScalar(ctx, (VarRef) { NULL, bp->name, lval }, rpr->item, DATA_TYPE_STRING);
break;
}
}
else
{
switch(rpr->type)
{
case RVAL_TYPE_SCALAR:
ScopeNewScalar(ctx, (VarRef) { NULL, bp->name, lval }, rpr->item, DATA_TYPE_STRING);
break;
case RVAL_TYPE_FNCALL:
{
FnCall *subfp = rpr->item;
Promise *pp = NULL; // This argument should really get passed down.
Rval rval = FnCallEvaluate(ctx, subfp, pp).rval;
if (rval.type == RVAL_TYPE_SCALAR)
{
ScopeNewScalar(ctx, (VarRef) { NULL, bp->name, lval }, rval.item, DATA_TYPE_STRING);
}
else
{
CfOut(OUTPUT_LEVEL_ERROR, "", "Only functions returning scalars can be used as arguments");
}
}
break;
default:
ProgrammingError("An argument neither a scalar nor a list seemed to appear. Impossible");
}
}
}
/* Check that there are no danglers left to evaluate in the hash table itself */
{
Scope *ptr = ScopeGet(bp->name);
AssocHashTableIterator i = HashIteratorInit(ptr->hashtable);
CfAssoc *assoc = NULL;
while ((assoc = HashIteratorNext(&i)))
{
Rval retval = ExpandPrivateRval(ctx, bp->name, assoc->rval);
// Retain the assoc, just replace rval
RvalDestroy(assoc->rval);
assoc->rval = retval;
}
}
return;
}
void ScopeAugment(EvalContext *ctx, const Bundle *bp, const Promise *pp, const Rlist *arguments)
{
if (RlistLen(bp->args) != RlistLen(arguments))
{
Log(LOG_LEVEL_ERR, "While constructing scope '%s'", bp->name);
fprintf(stderr, "Formal = ");
RlistShow(stderr, bp->args);
fprintf(stderr, ", Actual = ");
RlistShow(stderr, arguments);
fprintf(stderr, "\n");
FatalError(ctx, "Augment scope, formal and actual parameter mismatch is fatal");
}
const Bundle *pbp = NULL;
if (pp != NULL)
{
pbp = PromiseGetBundle(pp);
}
for (const Rlist *rpl = bp->args, *rpr = arguments; rpl != NULL; rpl = rpl->next, rpr = rpr->next)
{
const char *lval = rpl->item;
Log(LOG_LEVEL_VERBOSE, "Augment scope '%s' with variable '%s' (type: %c)", bp->name, lval, rpr->type);
// CheckBundleParameters() already checked that there is no namespace collision
// By this stage all functions should have been expanded, so we only have scalars left
if (IsNakedVar(rpr->item, '@'))
{
DataType vtype;
char naked[CF_BUFSIZE];
GetNaked(naked, rpr->item);
Rval retval;
if (pbp != NULL)
{
VarRef *ref = VarRefParseFromBundle(naked, pbp);
EvalContextVariableGet(ctx, ref, &retval, &vtype);
VarRefDestroy(ref);
}
else
{
VarRef *ref = VarRefParseFromBundle(naked, bp);
EvalContextVariableGet(ctx, ref, &retval, &vtype);
VarRefDestroy(ref);
}
switch (vtype)
{
case DATA_TYPE_STRING_LIST:
case DATA_TYPE_INT_LIST:
case DATA_TYPE_REAL_LIST:
{
VarRef *ref = VarRefParseFromBundle(lval, bp);
EvalContextVariablePut(ctx, ref, (Rval) { retval.item, RVAL_TYPE_LIST}, DATA_TYPE_STRING_LIST);
VarRefDestroy(ref);
}
break;
default:
{
Log(LOG_LEVEL_ERR, "List parameter '%s' not found while constructing scope '%s' - use @(scope.variable) in calling reference", naked, bp->name);
VarRef *ref = VarRefParseFromBundle(lval, bp);
EvalContextVariablePut(ctx, ref, (Rval) { rpr->item, RVAL_TYPE_SCALAR }, DATA_TYPE_STRING);
VarRefDestroy(ref);
}
break;
}
}
else
{
switch(rpr->type)
{
case RVAL_TYPE_SCALAR:
{
VarRef *ref = VarRefParseFromBundle(lval, bp);
EvalContextVariablePut(ctx, ref, (Rval) { rpr->item, RVAL_TYPE_SCALAR }, DATA_TYPE_STRING);
VarRefDestroy(ref);
}
break;
case RVAL_TYPE_FNCALL:
{
FnCall *subfp = rpr->item;
Rval rval = FnCallEvaluate(ctx, subfp, pp).rval;
if (rval.type == RVAL_TYPE_SCALAR)
{
VarRef *ref = VarRefParseFromBundle(lval, bp);
EvalContextVariablePut(ctx, ref, (Rval) { rval.item, RVAL_TYPE_SCALAR }, DATA_TYPE_STRING);
VarRefDestroy(ref);
}
else
{
Log(LOG_LEVEL_ERR, "Only functions returning scalars can be used as arguments");
}
}
break;
default:
ProgrammingError("An argument neither a scalar nor a list seemed to appear. Impossible");
}
}
}
/* Check that there are no danglers left to evaluate in the hash table itself */
return;
}
/**
* @brief Flattens an Rlist by expanding naked scalar list-variable
* members. Flattening is only one-level deep.
*/
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
Rlist *next;
for (Rlist *rp = *list; rp != NULL; rp = next)
{
next = rp->next;
if (rp->val.type == RVAL_TYPE_SCALAR &&
IsNakedVar(RlistScalarValue(rp), '@'))
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, RlistScalarValue(rp));
/* Make sure there are no inner expansions to take place, like if
* rp was "@{blah_$(blue)}". */
if (!IsExpandable(naked))
{
Log(LOG_LEVEL_DEBUG,
"Flattening slist: %s", RlistScalarValue(rp));
VarRef *ref = VarRefParse(naked);
DataType value_type;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value_type == CF_DATA_TYPE_NONE)
{
assert(value == NULL);
continue; /* undefined variable */
}
if (DataTypeToRvalType(value_type) != RVAL_TYPE_LIST)
{
Log(LOG_LEVEL_WARNING,
"'%s' failed - variable is not list but %s",
RlistScalarValue(rp), DataTypeToString(value_type));
continue;
}
/* NOTE: Remember that value can be NULL as an empty Rlist. */
/* at_node: just a mnemonic name for the
list node with @{blah}. */
Rlist *at_node = rp;
Rlist *insert_after = at_node;
for (const Rlist *rp2 = value; rp2 != NULL; rp2 = rp2->next)
{
assert(insert_after != NULL);
RlistInsertAfter(insert_after, RvalCopy(rp2->val));
insert_after = insert_after->next;
}
/* Make sure we won't miss any element. */
assert(insert_after->next == next);
RlistDestroyEntry(list, at_node); /* Delete @{blah} entry */
char *list_s = RlistToString(*list);
Log(LOG_LEVEL_DEBUG, "Flattened slist: %s", list_s);
free(list_s);
}
}
}
}
Rval EvaluateFinalRval(EvalContext *ctx, const Policy *policy, const char *ns, const char *scope,
Rval rval, bool forcelist, const Promise *pp)
{
assert(ctx);
assert(policy);
Rval returnval, newret;
if ((rval.type == RVAL_TYPE_SCALAR) && IsNakedVar(rval.item, '@')) /* Treat lists specially here */
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, rval.item);
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParseFromScope(naked, scope);
DataType value_type = DATA_TYPE_NONE;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
if (!value || DataTypeToRvalType(value_type) != RVAL_TYPE_LIST)
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
else
{
returnval.item = ExpandList(ctx, ns, scope, value, true);
returnval.type = RVAL_TYPE_LIST;
}
VarRefDestroy(ref);
}
else
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
}
else
{
if (forcelist) /* We are replacing scalar @(name) with list */
{
returnval = ExpandPrivateRval(ctx, ns, scope, rval.item, rval.type);
}
else
{
if (FnCallIsBuiltIn(rval))
{
returnval = RvalCopy(rval);
}
else
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
}
}
switch (returnval.type)
{
case RVAL_TYPE_SCALAR:
case RVAL_TYPE_CONTAINER:
break;
case RVAL_TYPE_LIST:
for (Rlist *rp = RvalRlistValue(returnval); rp; rp = rp->next)
{
if (rp->val.type == RVAL_TYPE_FNCALL)
{
FnCall *fp = RlistFnCallValue(rp);
FnCallResult res = FnCallEvaluate(ctx, policy, fp, pp);
FnCallDestroy(fp);
rp->val = res.rval;
}
else
{
if (EvalContextStackCurrentPromise(ctx))
{
if (IsCf3VarString(RlistScalarValue(rp)))
{
newret = ExpandPrivateRval(ctx, NULL, "this", rp->val.item, rp->val.type);
free(rp->val.item);
rp->val.item = newret.item;
}
}
}
/* returnval unchanged */
}
break;
case RVAL_TYPE_FNCALL:
if (FnCallIsBuiltIn(returnval))
{
FnCall *fp = RvalFnCallValue(returnval);
returnval = FnCallEvaluate(ctx, policy, fp, pp).rval;
FnCallDestroy(fp);
}
break;
default:
returnval.item = NULL;
returnval.type = RVAL_TYPE_NOPROMISEE;
break;
}
return returnval;
}
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);
}
Rval EvaluateFinalRval(EvalContext *ctx, const Policy *policy,
const char *ns, const char *scope,
Rval rval, bool forcelist, const Promise *pp)
{
assert(ctx);
assert(policy);
Rval returnval;
/* Treat lists specially. */
if (rval.type == RVAL_TYPE_SCALAR && IsNakedVar(rval.item, '@'))
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, rval.item);
if (IsExpandable(naked)) /* example: @(blah_$(blue)) */
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
else
{
VarRef *ref = VarRefParseFromScope(naked, scope);
DataType value_type;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (DataTypeToRvalType(value_type) == RVAL_TYPE_LIST)
{
returnval.item = ExpandList(ctx, ns, scope, value, true);
returnval.type = RVAL_TYPE_LIST;
}
else
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
}
}
else if (forcelist) /* We are replacing scalar @(name) with list */
{
returnval = ExpandPrivateRval(ctx, ns, scope, rval.item, rval.type);
}
else if (FnCallIsBuiltIn(rval))
{
returnval = RvalCopy(rval);
}
else
{
returnval = ExpandPrivateRval(ctx, NULL, "this", rval.item, rval.type);
}
switch (returnval.type)
{
case RVAL_TYPE_SCALAR:
case RVAL_TYPE_CONTAINER:
break;
case RVAL_TYPE_LIST:
for (Rlist *rp = RvalRlistValue(returnval); rp; rp = rp->next)
{
switch (rp->val.type)
{
case RVAL_TYPE_FNCALL:
{
FnCall *fp = RlistFnCallValue(rp);
rp->val = FnCallEvaluate(ctx, policy, fp, pp).rval;
FnCallDestroy(fp);
break;
}
case RVAL_TYPE_SCALAR:
if (EvalContextStackCurrentPromise(ctx) &&
IsCf3VarString(RlistScalarValue(rp)))
{
void *prior = rp->val.item;
rp->val = ExpandPrivateRval(ctx, NULL, "this",
prior, RVAL_TYPE_SCALAR);
free(prior);
}
/* else: returnval unchanged. */
break;
default:
assert(!"Bad type for entry in Rlist");
}
}
break;
case RVAL_TYPE_FNCALL:
if (FnCallIsBuiltIn(returnval))
{
FnCall *fp = RvalFnCallValue(returnval);
returnval = FnCallEvaluate(ctx, policy, fp, pp).rval;
FnCallDestroy(fp);
}
break;
default:
assert(returnval.item == NULL); /* else we're leaking it */
returnval.item = NULL;
returnval.type = RVAL_TYPE_NOPROMISEE;
break;
}
return returnval;
}
