/* Remove all aliases for a standard attr. */
static int
free_standard_attr_aliases(ATTR *a)
{
bool found_alias;
ATTR *curr;
const char *aliasname;
int count = 0;
/* Annoyingly convoluted because the ptab_delete will screw with the
* counter used by ptab_nextextry_new */
do {
found_alias = 0;
curr = ptab_firstentry_new(&ptab_attrib, &aliasname);
for (; curr; curr = ptab_nextentry_new(&ptab_attrib, &aliasname)) {
if (!strcmp(AL_NAME(curr), AL_NAME(a)) &&
strcmp(AL_NAME(curr), aliasname)) {
found_alias = 1;
ptab_delete(&ptab_attrib, aliasname);
count++;
break;
}
}
} while (found_alias);
return count;
}
/** Free all memory used by a standard attribute, and remove it from the hash
* table if necessary.
* \param a attr to remove
* \param inserted has the attr been inserted into the hash table already?
* \retval number of entries (including aliases) removed from the hash table
*/
static int
free_standard_attr(ATTR *a, bool inserted)
{
int count = 0;
if (!a) {
return count;
}
/* If the attr has no name, there's no way it can be in the hash table */
if (AL_NAME(a)) {
if (inserted) {
count = free_standard_attr_aliases(a) + 1;
ptab_delete(&ptab_attrib, AL_NAME(a));
}
free((char *) AL_NAME(a));
}
if (a->data != NULL_CHUNK_REFERENCE) {
chunk_delete(a->data);
}
mush_free(a, "ATTR");
return count;
}
/** Return a list of standard attributes.
* This functions returns the list of standard attributes, separated by
* spaces, in a statically allocated buffer.
*/
char *
list_attribs(void)
{
ATTR *ap;
const char *ptrs[BUFFER_LEN / 2];
static char buff[BUFFER_LEN];
char *bp;
const char *name;
int nptrs = -1, i;
for (ap = ptab_firstentry_new(&ptab_attrib, &name);
ap; ap = ptab_nextentry_new(&ptab_attrib, &name)) {
if (strcmp(name, AL_NAME(ap)))
continue;
ptrs[++nptrs] = AL_NAME(ap);
}
bp = buff;
if (nptrs >= 0)
safe_str(ptrs[0], buff, &bp);
for (i = 1; i < nptrs; i++) {
safe_chr(' ', buff, &bp);
safe_str(ptrs[i], buff, &bp);
}
*bp = '\0';
return buff;
}
/** Decompile the standard attribute table, as per \@attribute/decompile
* \param player The enactor
* \param pattern Wildcard pattern of attrnames to decompile
* \param retroactive Include the /retroactive switch?
*/
void
do_decompile_attribs(dbref player, char *pattern, int retroactive)
{
ATTR *ap;
const char *name;
notify(player, T("@@ Standard Attributes:"));
for (ap = ptab_firstentry_new(&ptab_attrib, &name);
ap; ap = ptab_nextentry_new(&ptab_attrib, &name)) {
if (strcmp(name, AL_NAME(ap)))
continue;
if (pattern && *pattern && !quick_wild(pattern, AL_NAME(ap)))
continue;
notify_format(player, "@attribute/access%s %s=%s",
(retroactive ? "/retroactive" : ""),
AL_NAME(ap), privs_to_string(attr_privs_view, AL_FLAGS(ap)));
if (ap->flags & AF_RLIMIT) {
notify_format(player, "@attribute/limit %s=%s", AL_NAME(ap),
display_attr_limit(ap));
} else if (ap->flags & AF_ENUM) {
notify_format(player, "@attribute/enum %s=%s", AL_NAME(ap),
display_attr_limit(ap));
}
}
}
/** Display information on an attribute from the table.
* \verbatim
* Top-level function for @attribute.
* \endverbatim
* \param player the enactor.
* \param name the name of the attribute.
*/
void
do_attribute_info(dbref player, char *name)
{
ATTR *ap;
if (!name || !*name) {
notify(player, T("Which attribute do you mean?"));
return;
}
/* Is this attribute in the table? */
if (*name == '@')
name++;
ap = aname_hash_lookup(name);
if (!ap) {
notify(player, T("That attribute isn't in the attribute table"));
return;
}
notify_format(player, "%9s: %s", T("Attribute"), AL_NAME(ap));
if (ap->flags & AF_RLIMIT) {
notify_format(player, "%9s: %s", T("Limit"), display_attr_limit(ap));
} else if (ap->flags & AF_ENUM) {
notify_format(player, "%9s: %s", T("Enum"), display_attr_limit(ap));
}
notify_format(player,
"%9s: %s", T("Flags"), privs_to_string(attr_privs_view,
AL_FLAGS(ap)));
notify_format(player, "%9s: %s", T("Creator"), unparse_dbref(AL_CREATOR(ap)));
return;
}
/* 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;
}
static void
grep_add_attr(char *buff, char **bp, dbref player, int count, ATTR *attr,
char *atrval)
{
if (buff) {
if (count)
safe_chr(' ', buff, bp);
safe_str(AL_NAME(attr), buff, bp);
} else {
notify_format(player, "%s%s [#%d%s]:%s %s",
ANSI_HILITE, AL_NAME(attr),
Owner(AL_CREATOR(attr)),
privs_to_letters(attr_privs_view, AL_FLAGS(attr)),
ANSI_END, atrval);
}
}
void
attr_write_all(PENNFILE *f)
{
int attrcount = 0, aliascount = 0;
ATTR *a;
const char *attrname;
char *data;
for (a = ptab_firstentry_new(&ptab_attrib, &attrname); a;
a = ptab_nextentry_new(&ptab_attrib, &attrname)) {
if (!strcmp(attrname, AL_NAME(a)))
attrcount++;
else
aliascount++;
}
db_write_labeled_int(f, "attrcount", attrcount);
for (a = ptab_firstentry_new(&ptab_attrib, &attrname); a;
a = ptab_nextentry_new(&ptab_attrib, &attrname)) {
if (strcmp(attrname, AL_NAME(a)))
continue; /* skip aliases */
db_write_labeled_string(f, " name", AL_NAME(a));
db_write_labeled_string(f, " flags",
privs_to_string(attr_privs_db, AL_FLAGS(a)));
db_write_labeled_dbref(f, " creator", AL_CREATOR(a));
data = atr_value(a);
db_write_labeled_string(f, " data", data);
}
db_write_labeled_int(f, "attraliascount", aliascount);
for (a = ptab_firstentry_new(&ptab_attrib, &attrname); a;
a = ptab_nextentry_new(&ptab_attrib, &attrname)) {
if (!strcmp(attrname, AL_NAME(a)))
continue; /* skip non-aliases */
db_write_labeled_string(f, " name", AL_NAME(a));
db_write_labeled_string(f, " alias", attrname);
}
}
static void
display_attr_info(dbref player, ATTR *ap)
{
notify_format(player, "%9s: %s", T("Attribute"), AL_NAME(ap));
if (ap->flags & AF_RLIMIT) {
notify_format(player, "%9s: %s", T("Limit"), display_attr_limit(ap));
} else if (ap->flags & AF_ENUM) {
notify_format(player, "%9s: %s", T("Enum"), display_attr_limit(ap));
}
notify_format(player,
"%9s: %s", T("Flags"), privs_to_string(attr_privs_view,
AL_FLAGS(ap)));
notify_format(player, "%9s: %s", T("Creator"), unparse_dbref(AL_CREATOR(ap)));
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);
}
/** 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;
}
/** Return a list of standard attributes.
* This functions returns the list of standard attributes, separated by
* spaces, in a statically allocated buffer.
*/
char *
list_attribs(void)
{
ATTR *ap;
const char *ptrs[BUFFER_LEN / 2];
static char buff[BUFFER_LEN];
char *bp;
int nptrs = 0, i;
ap = (ATTR *) ptab_firstentry(&ptab_attrib);
ptrs[0] = "";
while (ap) {
ptrs[nptrs++] = AL_NAME(ap);
ap = (ATTR *) ptab_nextentry(&ptab_attrib);
}
bp = buff;
safe_str(ptrs[0], buff, &bp);
for (i = 1; i < nptrs; i++) {
safe_chr(' ', buff, &bp);
safe_str(ptrs[i], buff, &bp);
}
*bp = '\0';
return buff;
}
/** 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));
}
void
attr_read_all(PENNFILE *f)
{
ATTR *a;
int c, found, count = 0;
char alias[BUFFER_LEN];
/* Clear existing attributes */
ptab_free(&ptab_attrib);
ptab_start_inserts(&ptab_attrib);
db_read_this_labeled_int(f, "attrcount", &count);
for (found = 0;;) {
c = penn_fgetc(f);
penn_ungetc(c, f);
if (c != ' ')
break;
found++;
if ((a = attr_read(f)))
ptab_insert(&ptab_attrib, a->name, a);
}
ptab_end_inserts(&ptab_attrib);
if (found != count)
do_rawlog(LT_ERR,
"WARNING: Actual number of attrs (%d) different than expected count (%d).",
found, count);
/* Assumes we'll always have at least one alias */
db_read_this_labeled_int(f, "attraliascount", &count);
for (found = 0;;) {
c = penn_fgetc(f);
penn_ungetc(c, f);
if (c != ' ')
break;
found++;
if ((a = attr_alias_read(f, alias))) {
upcasestr(alias);
if (!good_atr_name(alias)) {
do_rawlog(LT_ERR, "Bad attribute name on alias '%s' in db.", alias);
} else if (aname_find_exact(strupper(alias))) {
do_rawlog(LT_ERR,
"Unable to alias attribute '%s' to '%s' in db: alias already in use.",
AL_NAME(a), alias);
} else if (!alias_attribute(AL_NAME(a), alias)) {
do_rawlog(LT_ERR, "Unable to alias attribute '%s' to '%s' in db.",
AL_NAME(a), alias);
}
}
}
if (found != count)
do_rawlog(LT_ERR,
"WARNING: Actual number of attr aliases (%d) different than expected count (%d).",
found, count);
return;
}
static ATTR *
attr_read(PENNFILE *f)
{
ATTR *a;
char *tmp;
dbref d = GOD;
privbits flags = 0;
a = (ATTR *) mush_malloc(sizeof(ATTR), "ATTR");
if (!a) {
mush_panic("Not enough memory to add attribute in attr_read()!");
return NULL;
}
AL_NAME(a) = NULL;
a->data = NULL_CHUNK_REFERENCE;
AL_FLAGS(a) = 0;
AL_CREATOR(a) = GOD;
a->next = NULL;
db_read_this_labeled_string(f, "name", &tmp);
if (!good_atr_name(tmp)) {
do_rawlog(LT_ERR, "Invalid attribute name '%s' in db.", tmp);
(void) getstring_noalloc(f); /* flags */
(void) getstring_noalloc(f); /* creator */
(void) getstring_noalloc(f); /* data */
free_standard_attr(a, 0);
return NULL;
}
AL_NAME(a) = strdup(tmp);
db_read_this_labeled_string(f, "flags", &tmp);
if (tmp && *tmp && strcasecmp(tmp, "none")) {
flags = list_to_privs(attr_privs_db, tmp, 0);
if (!flags) {
do_rawlog(LT_ERR, "Invalid attribute flags for '%s' in db.", AL_NAME(a));
free((char *) AL_NAME(a));
(void) getstring_noalloc(f); /* creator */
(void) getstring_noalloc(f); /* data */
free_standard_attr(a, 0);
return NULL;
}
}
AL_FLAGS(a) = flags;
db_read_this_labeled_dbref(f, "creator", &d);
AL_CREATOR(a) = d;
db_read_this_labeled_string(f, "data", &tmp);
if (!tmp || !*tmp || !(AL_FLAGS(a) & (AF_ENUM | AF_RLIMIT))) {
a->data = NULL_CHUNK_REFERENCE;
} else if (AL_FLAGS(a) & AF_ENUM) {
/* Store string as it is */
char *t = compress(tmp);
a->data = chunk_create(t, strlen(t), 0);
free(t);
} else if (AL_FLAGS(a) & AF_RLIMIT) {
/* Need to validate regexp */
char *t;
pcre *re;
const char *errptr;
int erroffset;
re = pcre_compile(tmp, PCRE_CASELESS, &errptr, &erroffset, tables);
if (!re) {
do_rawlog(LT_ERR, "Invalid regexp in limit for attribute '%s' in db.",
AL_NAME(a));
free_standard_attr(a, 0);
return NULL;
}
pcre_free(re); /* don't need it, just needed to check it */
t = compress(tmp);
a->data = chunk_create(t, strlen(t), 0);
free(t);
}
return a;
}
