/* Add a new, or restrict an existing, standard attribute from cnf file */
int
cnf_attribute_access(char *attrname, char *opts)
{
ATTR *a;
privbits flags = 0;
upcasestr(attrname);
if (!good_atr_name(attrname))
return 0;
if (strcasecmp(opts, "none")) {
flags = list_to_privs(attr_privs_set, opts, 0);
if (!flags)
return 0;
}
a = (ATTR *) ptab_find_exact(&ptab_attrib, attrname);
if (a) {
if (AF_Internal(a))
return 0;
} else {
a = (ATTR *) mush_malloc(sizeof(ATTR), "ATTR");
if (!a)
return 0;
AL_NAME(a) = strdup(attrname);
a->data = NULL_CHUNK_REFERENCE;
ptab_insert_one(&ptab_attrib, attrname, a);
}
AL_FLAGS(a) = flags;
AL_CREATOR(a) = GOD;
return 1;
}
/** Populate a ufun_attrib struct from an obj/attr pair.
* \verbatim Given an attribute [<object>/]<name> pair (which may include #lambda),
* fetch its value, owner (thing), and pe_flags, and store in the struct
* pointed to by ufun
* \endverbatim
* \param attrstring The obj/name of attribute.
* \param executor Dbref of the executing object.
* \param ufun Pointer to an allocated ufun_attrib struct to fill in.
* \param flags A bitwise or of desired UFUN_* flags.
* \return 0 on failure, true on success.
*/
bool
fetch_ufun_attrib(const char *attrstring, dbref executor, ufun_attrib * ufun,
int flags)
{
char *thingname, *attrname;
char astring[BUFFER_LEN];
ATTR *attrib;
if (!ufun)
return 0;
ufun->contents[0] = '\0';
ufun->errmess = (char *) "";
ufun->thing = executor;
ufun->pe_flags = PE_UDEFAULT;
ufun->ufun_flags = flags;
ufun->thing = executor;
thingname = NULL;
if (!attrstring)
return 0;
strncpy(astring, attrstring, BUFFER_LEN);
/* Split obj/attr */
if ((flags & UFUN_OBJECT) && ((attrname = strchr(astring, '/')) != NULL)) {
thingname = astring;
*(attrname++) = '\0';
} else {
attrname = astring;
}
if (thingname && (flags & UFUN_LAMBDA)
&& (strcasecmp(thingname, "#lambda") == 0
|| strncasecmp(thingname, "#apply", 6) == 0)) {
/* It's a lambda. */
ufun->ufun_flags &= ~UFUN_NAME;
ufun->thing = executor;
if (strcasecmp(thingname, "#lambda") == 0)
mush_strncpy(ufun->contents, attrname, BUFFER_LEN);
else { /* #apply */
char *ucb = ufun->contents;
unsigned nargs = 1, n;
thingname += 6;
if (*thingname)
nargs = parse_uinteger(thingname);
/* Limit between 1 and 10 arguments (%0-%9) */
if (nargs == 0)
nargs = 1;
if (nargs > 10)
nargs = 10;
safe_str(attrname, ufun->contents, &ucb);
safe_chr('(', ufun->contents, &ucb);
for (n = 0; n < nargs; n++) {
if (n > 0)
safe_chr(',', ufun->contents, &ucb);
safe_format(ufun->contents, &ucb, "%%%u", n);
}
safe_chr(')', ufun->contents, &ucb);
*ucb = '\0';
}
ufun->attrname[0] = '\0';
return 1;
}
if (thingname) {
/* Attribute is on something else. */
ufun->thing =
noisy_match_result(executor, thingname, NOTYPE, MAT_EVERYTHING);
if (!GoodObject(ufun->thing)) {
ufun->errmess = (char *) "#-1 INVALID OBJECT";
return 0;
}
}
attrib = (ATTR *) atr_get(ufun->thing, upcasestr(attrname));
if (attrib && AF_Internal(attrib)) {
/* Regardless of whether we're doing permission checks, we should
* never be showing internal attributes here */
attrib = NULL;
}
/* An empty attrib is the same as no attrib. */
if (attrib == NULL) {
if (flags & UFUN_REQUIRE_ATTR) {
if (!(flags & UFUN_IGNORE_PERMS) && !Can_Examine(executor, ufun->thing))
ufun->errmess = e_atrperm;
return 0;
} else {
mush_strncpy(ufun->attrname, attrname, ATTRIBUTE_NAME_LIMIT + 1);
return 1;
}
}
if (!(flags & UFUN_IGNORE_PERMS)
&& !Can_Read_Attr(executor, ufun->thing, attrib)) {
ufun->errmess = e_atrperm;
return 0;
}
if (!(flags & UFUN_IGNORE_PERMS)
&& !CanEvalAttr(executor, ufun->thing, attrib)) {
ufun->errmess = e_perm;
return 0;
}
/* DEBUG attributes */
if (AF_NoDebug(attrib))
ufun->pe_flags |= PE_NODEBUG; /* No_Debug overrides Debug */
else if (AF_Debug(attrib))
ufun->pe_flags |= PE_DEBUG;
if (flags & UFUN_NAME) {
if (attrib->flags & AF_NONAME)
ufun->ufun_flags &= ~UFUN_NAME;
else if (attrib->flags & AF_NOSPACE)
ufun->ufun_flags |= UFUN_NAME_NOSPACE;
}
/* Populate the ufun object */
mush_strncpy(ufun->contents, atr_value(attrib), BUFFER_LEN);
mush_strncpy(ufun->attrname, AL_NAME(attrib), ATTRIBUTE_NAME_LIMIT + 1);
/* We're good */
return 1;
}
/** Add new standard attributes, or change permissions on them.
* \verbatim
* Given the name and permission string for an attribute, add it to
* the attribute table (or modify the permissions if it's already
* there). Permissions may be changed retroactively, which modifies
* permissions on any copies of that attribute set on objects in the
* database. This is the top-level code for @attribute/access.
* \endverbatim
* \param player the enactor.
* \param name the attribute name.
* \param perms a string of attribute permissions, space-separated.
* \param retroactive if true, apply the permissions retroactively.
*/
void
do_attribute_access(dbref player, char *name, char *perms, int retroactive)
{
ATTR *ap, *ap2;
privbits flags = 0;
int i;
int insert = 0;
/* Parse name and perms */
if (!name || !*name) {
notify(player, T("Which attribute do you mean?"));
return;
}
if (strcasecmp(perms, "none")) {
flags = list_to_privs(attr_privs_set, perms, 0);
if (!flags) {
notify(player, T("I don't understand those permissions."));
return;
}
}
upcasestr(name);
/* Is this attribute already in the table? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (ap) {
if (AF_Internal(ap)) {
/* Don't muck with internal attributes */
notify(player, T("That attribute's permissions can not be changed."));
return;
}
} else {
/* Create fresh if the name is ok */
if (!good_atr_name(name)) {
notify(player, T("Invalid attribute name."));
return;
}
insert = 1;
ap = (ATTR *) mush_malloc(sizeof(ATTR), "ATTR");
if (!ap) {
notify(player, T("Critical memory failure - Alert God!"));
do_log(LT_ERR, 0, 0, "do_attribute_access: unable to malloc ATTR");
return;
}
AL_NAME(ap) = strdup(name);
ap->data = NULL_CHUNK_REFERENCE;
}
AL_FLAGS(ap) = flags;
AL_CREATOR(ap) = player;
/* Only insert when it's not already in the table */
if (insert) {
ptab_insert_one(&ptab_attrib, name, ap);
}
/* Ok, now we need to see if there are any attributes of this name
* set on objects in the db. If so, and if we're retroactive, set
* perms/creator
*/
if (retroactive) {
for (i = 0; i < db_top; i++) {
if ((ap2 = atr_get_noparent(i, name))) {
if (AL_FLAGS(ap2) & AF_ROOT)
AL_FLAGS(ap2) = flags | AF_ROOT;
else
AL_FLAGS(ap2) = flags;
AL_CREATOR(ap2) = player;
}
}
}
notify_format(player, T("%s -- Attribute permissions now: %s"), name,
privs_to_string(attr_privs_view, flags));
}
/** Limit an attribute's possible values, using either an enum or a
* regexp /limit.
* \verbatim
* Given a name, restriction type and string for an attribute,
* set its data value to said data and set a flag for limit or
* enum.
*
* For an enum, the attr's data will be set to
* <delim><pattern><delim>, so a simple strstr() can be used when
* matching the pattern.
*
* An optional delimiter can be provided on the left hand side by using
* @attr/enum <delim> <attrname>=<enum list>
* \endverbatim
* \param player the enactor.
* \param name the attribute name.
* \param type AF_RLIMIT for regexp, AF_ENUM for enum.
* \param pattern The allowed pattern for the attribute.
*/
void
do_attribute_limit(dbref player, char *name, int type, char *pattern)
{
ATTR *ap;
char buff[BUFFER_LEN];
char *ptr, *bp;
char delim = ' ';
pcre *re;
const char *errptr;
int erroffset;
int unset = 0;
if (pattern && *pattern) {
if (type == AF_RLIMIT) {
/* Compile to regexp. */
re = pcre_compile(remove_markup(pattern, NULL), PCRE_CASELESS,
&errptr, &erroffset, tables);
if (!re) {
notify(player, T("Invalid Regular Expression."));
return;
}
/* We only care if it's valid, we're not using it. */
free(re);
/* Copy it to buff to be placed into ap->data. */
snprintf(buff, BUFFER_LEN, "%s", pattern);
} else if (type == AF_ENUM) {
ptr = name;
/* Check for a delimiter: @attr/enum | attrname=foo */
if ((name = strchr(ptr, ' ')) != NULL) {
*(name++) = '\0';
if (strlen(ptr) > 1) {
notify(player, T("Delimiter must be one character."));
return;
}
delim = *ptr;
} else {
name = ptr;
delim = ' ';
}
/* For speed purposes, we require the pattern to begin and end with
* a delimiter. */
snprintf(buff, BUFFER_LEN, "%c%s%c", delim, pattern, delim);
buff[BUFFER_LEN - 1] = '\0';
/* For sanity's sake, we'll enforce a properly delimited enum
* with a quick and dirty squish().
* We already know we start with a delim, hence the +1 =). */
for (ptr = buff + 1, bp = buff + 1; *ptr; ptr++) {
if (!(*ptr == delim && *(ptr - 1) == delim)) {
*(bp++) = *ptr;
}
}
*bp = '\0';
} else {
/* Err, we got called with the wrong limit type? */
notify(player, T("Unknown limit type?"));
return;
}
} else {
unset = 1;
}
/* Parse name and perms */
if (!name || !*name) {
notify(player, T("Which attribute do you mean?"));
return;
}
upcasestr(name);
if (*name == '@')
name++;
/* Is this attribute already in the table? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (!ap) {
notify(player,
T
("I don't know that attribute. Please use @attribute/access to create it, first."));
return;
}
if (AF_Internal(ap)) {
/* Don't muck with internal attributes */
notify(player, T("That attribute's permissions cannot be changed."));
return;
}
/* All's good, set the data and the AF_RLIMIT or AF_ENUM flag. */
if (ap->data != NULL_CHUNK_REFERENCE) {
chunk_delete(ap->data);
}
/* Clear any extant rlimit or enum flags */
ap->flags &= ~(AF_RLIMIT | AF_ENUM);
if (unset) {
if (ap->data != NULL_CHUNK_REFERENCE) {
ap->data = NULL_CHUNK_REFERENCE;
notify_format(player, T("%s -- Attribute limit or enum unset."), name);
} else {
notify_format(player,
T("%s -- Attribute limit or enum already unset."), name);
}
} else {
unsigned char *t = compress(buff);
ap->data = chunk_create(t, u_strlen(t), 0);
free(t);
ap->flags |= type;
notify_format(player,
T("%s -- Attribute %s set to: %s"), name,
type == AF_RLIMIT ? "limit" : "enum", display_attr_limit(ap));
}
}
