/* 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;
}
/** Delete an attribute from the attribute table.
* \verbatim
* Top-level function for @attrib/delete.
* \endverbatim
* \param player the enactor.
* \param name the name of the attribute to delete.
*/
void
do_attribute_delete(dbref player, char *name)
{
ATTR *ap;
if (!name || !*name) {
notify(player, T("Which attribute do you mean?"));
return;
}
/* Is this attribute in the table? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (!ap) {
notify(player, T("That attribute isn't in the attribute table"));
return;
}
/* Free everything it uses. */
if (ap->data != NULL_CHUNK_REFERENCE) {
chunk_delete(ap->data);
}
/* Ok, take it out of the hash table */
ptab_delete(&ptab_attrib, name);
notify_format(player, T("Removed %s from attribute table."), name);
return;
}
static ATTR *
aname_find_exact(const char *name)
{
char atrname[BUFFER_LEN];
strcpy(atrname, name);
upcasestr(atrname);
return (ATTR *) ptab_find_exact(&ptab_attrib, atrname);
}
/** Attribute table lookup by name or alias.
* given an attribute name, look it up in the complete attribute table
* (real names plus aliases), and return the appropriate real attribute.
*/
ATTR *
aname_hash_lookup(const char *name)
{
ATTR *ap;
/* Exact matches always work */
if ((ap = (ATTR *) ptab_find_exact(&ptab_attrib, name)))
return ap;
/* Prefix matches work if the attribute is AF_PREFIXMATCH */
if ((ap = (ATTR *) ptab_find(&ptab_attrib, name)) && AF_Prefixmatch(ap))
return ap;
return NULL;
}
/** Rename an attribute in the attribute table.
* \verbatim
* Top-level function for @attrib/rename.
* \endverbatim
* \param player the enactor.
* \param old the name of the attribute to rename.
* \param newname the new name (surprise!)
*/
void
do_attribute_rename(dbref player, char *old, char *newname)
{
ATTR *ap;
if (!old || !*old || !newname || !*newname) {
notify(player, T("Which attributes do you mean?"));
return;
}
upcasestr(old);
upcasestr(newname);
/* Is the new name valid? */
if (!good_atr_name(newname)) {
notify(player, T("Invalid attribute name."));
return;
}
/* Is the new name already in use? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, newname);
if (ap) {
notify_format(player,
T("The name %s is already used in the attribute table."),
newname);
return;
}
/* Is the old name a real attribute? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, old);
if (!ap) {
notify(player, T("That attribute isn't in the attribute table"));
return;
}
/* Ok, take it out and put it back under the new name */
ptab_delete(&ptab_attrib, old);
/* This causes a slight memory leak if you rename an attribute
added via /access. But that doesn't happen often. Will fix
someday. */
AL_NAME(ap) = strdup(newname);
ptab_insert_one(&ptab_attrib, newname, ap);
notify_format(player,
T("Renamed %s to %s in attribute table."), old, newname);
return;
}
/** Add a new attribute. Called from db.c to add new attributes
* to older databases which have their own attr table.
* \param name name of attr to add
* \param flags attribute flags (AF_*)
*/
void
add_new_attr(char *name, uint32_t flags)
{
ATTR *ap;
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (ap || !good_atr_name(name))
return;
ap = (ATTR *) mush_malloc(sizeof(ATTR), "ATTR");
if (!ap) {
do_log(LT_ERR, 0, 0, "add_new_attr: unable to malloc ATTR");
return;
}
AL_NAME(ap) = strdup(name);
ap->data = NULL_CHUNK_REFERENCE;
AL_FLAGS(ap) = flags;
AL_CREATOR(ap) = 0;
ptab_insert_one(&ptab_attrib, name, ap);
}
/** Delete an attribute from the attribute table.
* \verbatim
* Top-level function for @attrib/delete.
* \endverbatim
* \param player the enactor.
* \param name the name of the attribute to delete.
*/
void
do_attribute_delete(dbref player, char *name)
{
ATTR *ap;
int count;
if (!name || !*name) {
notify(player, T("Which attribute do you mean?"));
return;
}
/* Is this attribute in the table? */
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (!ap) {
notify(player, T("That attribute isn't in the attribute table"));
return;
}
/* Display current attr info, for backup/safety reasons */
display_attr_info(player, ap);
/* Free all data, remove any aliases, and remove from the hash table */
count = free_standard_attr(ap, 1);
switch (count) {
case 0:
notify_format(player, T("Failed to remove %s from attribute table."), name);
break;
case 1:
notify_format(player, T("Removed %s from attribute table."), name);
break;
default:
notify_format(player,
T("Removed %s and %d alias(es) from attribute table."), name,
count - 1);
break;
}
return;
}
/** 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));
}
}
/** Check an attribute's value against /limit or /enum restrictions.
* \param player Player attempting to set the attribute. Used for notify()
* \param name the attribute name.
* \param value The desired attribute value.
* \retval The new value to set if valid, NULL if not.
*/
const char *
check_attr_value(dbref player, const char *name, const char *value)
{
/* Check for attribute limits and enums. */
ATTR *ap;
char *attrval;
pcre *re;
int subpatterns;
const char *errptr;
int erroffset;
char *ptr, *ptr2;
char delim;
int len;
static char buff[BUFFER_LEN];
char vbuff[BUFFER_LEN];
if (!name || !*name)
return value;
if (!value)
return value;
upcasestr((char *) name);
ap = (ATTR *) ptab_find_exact(&ptab_attrib, name);
if (!ap)
return value;
attrval = atr_value(ap);
if (!attrval) {
return value;
}
if (ap->flags & AF_RLIMIT) {
re = pcre_compile(remove_markup(attrval, NULL), PCRE_CASELESS,
&errptr, &erroffset, tables);
if (!re)
return value;
subpatterns = pcre_exec(re, default_match_limit(), value, strlen(value),
0, 0, NULL, 0);
free(re);
if (subpatterns >= 0) {
return value;
} else {
notify(player, T("Attribute value does not match the /limit regexp."));
return NULL;
}
} else if (ap->flags & AF_ENUM) {
/* Delimiter is always the first character of the enum string.
* and the value cannot have the delimiter in it. */
delim = *attrval;
if (!*value || strchr(value, delim)) {
notify_format(player,
T("Value for %s needs to be one of: %s"),
ap->name, display_attr_limit(ap));
return NULL;
}
/* We match the enum case-insensitively, BUT we use the case
* that is defined in the enum, so we copy the attr value
* to buff and use that. */
snprintf(buff, BUFFER_LEN, "%s", attrval);
upcasestr(buff);
len = strlen(value);
snprintf(vbuff, BUFFER_LEN, "%c%s%c", delim, value, delim);
upcasestr(vbuff);
ptr = strstr(buff, vbuff);
if (!ptr) {
*(vbuff + len + 1) = '\0'; /* Remove the second delim */
ptr = strstr(buff, vbuff);
}
/* Do we have a match? */
if (ptr) {
/* ptr is pointing at the delim before the value. */
ptr++;
ptr2 = strchr(ptr, delim);
if (!ptr2)
return NULL; /* Shouldn't happen, but sanity check. */
/* Now we need to copy over the _original case_ version of the
* enumerated string. Nasty pointer arithmetic. */
strncpy(buff, attrval + (ptr - buff), (int) (ptr2 - ptr));
buff[ptr2 - ptr] = '\0';
return buff;
} else {
notify_format(player,
T("Value for %s needs to be one of: %s"),
ap->name, display_attr_limit(ap));
return NULL;
}
}
return value;
}
