fix dlen
[citadel.git] / citadel / user_ops.c
diff --git a/citadel/user_ops.c b/citadel/user_ops.c
deleted file mode 100644 (file)
index 607f16b..0000000
+++ /dev/null
@@ -1,1263 +0,0 @@
-/* 
- * Server functions which perform operations on user objects.
- *
- * Copyright (c) 1987-2018 by the citadel.org team
- *
- * This program is open source software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <stdlib.h>
-#include <unistd.h>
-#include "sysdep.h"
-#include <stdio.h>
-#include <sys/stat.h>
-#include <libcitadel.h>
-#include "control.h"
-#include "support.h"
-#include "citserver.h"
-#include "config.h"
-#include "citadel_ldap.h"
-#include "ctdl_module.h"
-#include "user_ops.h"
-#include "internet_addressing.h"
-
-/* These pipes are used to talk to the chkpwd daemon, which is forked during startup */
-int chkpwd_write_pipe[2];
-int chkpwd_read_pipe[2];
-
-
-/*
- * CtdlGetUser()       retrieve named user into supplied buffer.
- *                     returns 0 on success
- */
-int CtdlGetUser(struct ctdluser *usbuf, char *name)
-{
-       char usernamekey[USERNAME_SIZE];
-       struct cdbdata *cdbus;
-       long len = cutuserkey(name);
-
-       if (usbuf != NULL) {
-               memset(usbuf, 0, sizeof(struct ctdluser));
-       }
-
-       makeuserkey(usernamekey, name, len);
-       cdbus = cdb_fetch(CDB_USERS, usernamekey, strlen(usernamekey));
-
-       if (cdbus == NULL) {    /* user not found */
-               return(1);
-       }
-       if (usbuf != NULL) {
-               memcpy(usbuf, cdbus->ptr, ((cdbus->len > sizeof(struct ctdluser)) ?  sizeof(struct ctdluser) : cdbus->len));
-       }
-       cdb_free(cdbus);
-       return(0);
-}
-
-
-int CtdlLockGetCurrentUser(void)
-{
-       CitContext *CCC = CC;
-       return CtdlGetUser(&CCC->user, CCC->curr_user);
-}
-
-
-/*
- * CtdlGetUserLock()  -  same as getuser() but locks the record
- */
-int CtdlGetUserLock(struct ctdluser *usbuf, char *name)
-{
-       int retcode;
-
-       retcode = CtdlGetUser(usbuf, name);
-       if (retcode == 0) {
-               begin_critical_section(S_USERS);
-       }
-       return(retcode);
-}
-
-
-/*
- * CtdlPutUser()  -  write user buffer into the correct place on disk
- */
-void CtdlPutUser(struct ctdluser *usbuf)
-{
-       char usernamekey[USERNAME_SIZE];
-
-       makeuserkey(usernamekey, usbuf->fullname, cutuserkey(usbuf->fullname));
-       usbuf->version = REV_LEVEL;
-       cdb_store(CDB_USERS, usernamekey, strlen(usernamekey), usbuf, sizeof(struct ctdluser));
-}
-
-
-void CtdlPutCurrentUserLock()
-{
-       CtdlPutUser(&CC->user);
-}
-
-
-/*
- * CtdlPutUserLock()  -  same as putuser() but locks the record
- */
-void CtdlPutUserLock(struct ctdluser *usbuf)
-{
-       CtdlPutUser(usbuf);
-       end_critical_section(S_USERS);
-}
-
-
-/*
- * rename_user()  -  this is tricky because the user's display name is the database key
- *
- * Returns 0 on success or nonzero if there was an error...
- *
- */
-int rename_user(char *oldname, char *newname) {
-       int retcode = RENAMEUSER_OK;
-       struct ctdluser usbuf;
-
-       char oldnamekey[USERNAME_SIZE];
-       char newnamekey[USERNAME_SIZE];
-
-       /* Create the database keys... */
-       makeuserkey(oldnamekey, oldname, cutuserkey(oldname));
-       makeuserkey(newnamekey, newname, cutuserkey(newname));
-
-       /* Lock up and get going */
-       begin_critical_section(S_USERS);
-
-       /* We cannot rename a user who is currently logged in */
-       if (CtdlIsUserLoggedIn(oldname)) {
-               end_critical_section(S_USERS);
-               return RENAMEUSER_LOGGED_IN;
-       }
-
-       if (CtdlGetUser(&usbuf, newname) == 0) {
-               retcode = RENAMEUSER_ALREADY_EXISTS;
-       }
-       else {
-
-               if (CtdlGetUser(&usbuf, oldname) != 0) {
-                       retcode = RENAMEUSER_NOT_FOUND;
-               }
-
-               else {          /* Sanity checks succeeded.  Now rename the user. */
-                       if (usbuf.usernum == 0)
-                       {
-                               syslog(LOG_DEBUG, "user_ops: can not rename user \"Citadel\".");
-                               retcode = RENAMEUSER_NOT_FOUND;
-                       } else {
-                               syslog(LOG_DEBUG, "user_ops: renaming <%s> to <%s>", oldname, newname);
-                               cdb_delete(CDB_USERS, oldnamekey, strlen(oldnamekey));
-                               safestrncpy(usbuf.fullname, newname, sizeof usbuf.fullname);
-                               CtdlPutUser(&usbuf);
-                               cdb_store(CDB_USERSBYNUMBER, &usbuf.usernum, sizeof(long), usbuf.fullname, strlen(usbuf.fullname)+1 );
-                               retcode = RENAMEUSER_OK;
-                       }
-               }
-       
-       }
-
-       end_critical_section(S_USERS);
-       return(retcode);
-}
-
-
-/*
- * Index-generating function used by Ctdl[Get|Set]Relationship
- */
-int GenerateRelationshipIndex(char *IndexBuf,
-                             long RoomID,
-                             long RoomGen,
-                             long UserID)
-{
-
-       struct {
-               long iRoomID;
-               long iRoomGen;
-               long iUserID;
-       } TheIndex;
-
-       TheIndex.iRoomID = RoomID;
-       TheIndex.iRoomGen = RoomGen;
-       TheIndex.iUserID = UserID;
-
-       memcpy(IndexBuf, &TheIndex, sizeof(TheIndex));
-       return(sizeof(TheIndex));
-}
-
-
-/*
- * Back end for CtdlSetRelationship()
- */
-void put_visit(visit *newvisit)
-{
-       char IndexBuf[32];
-       int IndexLen = 0;
-
-       memset (IndexBuf, 0, sizeof (IndexBuf));
-       /* Generate an index */
-       IndexLen = GenerateRelationshipIndex(IndexBuf, newvisit->v_roomnum, newvisit->v_roomgen, newvisit->v_usernum);
-
-       /* Store the record */
-       cdb_store(CDB_VISIT, IndexBuf, IndexLen,
-                 newvisit, sizeof(visit)
-       );
-}
-
-
-/*
- * Define a relationship between a user and a room
- */
-void CtdlSetRelationship(visit *newvisit,
-                        struct ctdluser *rel_user,
-                        struct ctdlroom *rel_room)
-{
-       /* We don't use these in Citadel because they're implicit by the
-        * index, but they must be present if the database is exported.
-        */
-       newvisit->v_roomnum = rel_room->QRnumber;
-       newvisit->v_roomgen = rel_room->QRgen;
-       newvisit->v_usernum = rel_user->usernum;
-
-       put_visit(newvisit);
-}
-
-
-/*
- * Locate a relationship between a user and a room
- */
-void CtdlGetRelationship(visit *vbuf,
-                        struct ctdluser *rel_user,
-                        struct ctdlroom *rel_room)
-{
-       char IndexBuf[32];
-       int IndexLen;
-       struct cdbdata *cdbvisit;
-
-       /* Generate an index */
-       IndexLen = GenerateRelationshipIndex(IndexBuf, rel_room->QRnumber, rel_room->QRgen, rel_user->usernum);
-
-       /* Clear out the buffer */
-       memset(vbuf, 0, sizeof(visit));
-
-       cdbvisit = cdb_fetch(CDB_VISIT, IndexBuf, IndexLen);
-       if (cdbvisit != NULL) {
-               memcpy(vbuf, cdbvisit->ptr, ((cdbvisit->len > sizeof(visit)) ?  sizeof(visit) : cdbvisit->len));
-               cdb_free(cdbvisit);
-       }
-       else {
-               /* If this is the first time the user has seen this room,
-                * set the view to be the default for the room.
-                */
-               vbuf->v_view = rel_room->QRdefaultview;
-       }
-
-       /* Set v_seen if necessary */
-       if (vbuf->v_seen[0] == 0) {
-               snprintf(vbuf->v_seen, sizeof vbuf->v_seen, "*:%ld", vbuf->v_lastseen);
-       }
-}
-
-
-void CtdlMailboxName(char *buf, size_t n, const struct ctdluser *who, const char *prefix)
-{
-       snprintf(buf, n, "%010ld.%s", who->usernum, prefix);
-}
-
-
-void MailboxName(char *buf, size_t n, const struct ctdluser *who, const char *prefix)
-{
-       snprintf(buf, n, "%010ld.%s", who->usernum, prefix);
-}
-
-
-/*
- * Check to see if the specified user has Internet mail permission
- * (returns nonzero if permission is granted)
- */
-int CtdlCheckInternetMailPermission(struct ctdluser *who) {
-
-       /* Do not allow twits to send Internet mail */
-       if (who->axlevel <= AxProbU) return(0);
-
-       /* Globally enabled? */
-       if (CtdlGetConfigInt("c_restrict") == 0) return(1);
-
-       /* User flagged ok? */
-       if (who->flags & US_INTERNET) return(2);
-
-       /* Admin level access? */
-       if (who->axlevel >= AxAideU) return(3);
-
-       /* No mail for you! */
-       return(0);
-}
-
-
-/*
- * Convenience function.
- */
-int CtdlAccessCheck(int required_level)
-{
-       if (CC->internal_pgm) return(0);
-       if (required_level >= ac_internal) {
-               cprintf("%d This is not a user-level command.\n", ERROR + HIGHER_ACCESS_REQUIRED);
-               return(-1);
-       }
-
-       if ((required_level >= ac_logged_in_or_guest) && (CC->logged_in == 0) && (CtdlGetConfigInt("c_guest_logins") == 0)) {
-               cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
-               return(-1);
-       }
-
-       if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
-               cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
-               return(-1);
-       }
-
-       if (CC->user.axlevel >= AxAideU) return(0);
-       if (required_level >= ac_aide) {
-               cprintf("%d This command requires Admin access.\n",
-                       ERROR + HIGHER_ACCESS_REQUIRED);
-               return(-1);
-       }
-
-       if (is_room_aide()) return(0);
-       if (required_level >= ac_room_aide) {
-               cprintf("%d This command requires Admin or Room Admin access.\n",
-                       ERROR + HIGHER_ACCESS_REQUIRED);
-               return(-1);
-       }
-
-       /* shhh ... succeed quietly */
-       return(0);
-}
-
-
-/*
- * Is the user currently logged in an Admin?
- */
-int is_aide(void)
-{
-       if (CC->user.axlevel >= AxAideU)
-               return(1);
-       else
-               return(0);
-}
-
-
-/*
- * Is the user currently logged in an Admin *or* the room Admin for this room?
- */
-int is_room_aide(void)
-{
-
-       if (!CC->logged_in) {
-               return(0);
-       }
-
-       if ((CC->user.axlevel >= AxAideU) || (CC->room.QRroomaide == CC->user.usernum)) {
-               return(1);
-       } else {
-               return(0);
-       }
-}
-
-
-/*
- * CtdlGetUserByNumber() -     get user by number
- *                     returns 0 if user was found
- *
- * Note: fetching a user this way requires one additional database operation.
- */
-int CtdlGetUserByNumber(struct ctdluser *usbuf, long number)
-{
-       struct cdbdata *cdbun;
-       int r;
-
-       cdbun = cdb_fetch(CDB_USERSBYNUMBER, &number, sizeof(long));
-       if (cdbun == NULL) {
-               syslog(LOG_INFO, "user_ops: %ld not found", number);
-               return(-1);
-       }
-
-       syslog(LOG_INFO, "user_ops: %ld maps to %s", number, cdbun->ptr);
-       r = CtdlGetUser(usbuf, cdbun->ptr);
-       cdb_free(cdbun);
-       return(r);
-}
-
-
-/*
- * Helper function for rebuild_usersbynumber()
- */
-void rebuild_ubn_for_user(struct ctdluser *usbuf, void *data) {
-
-       struct ubnlist {
-               struct ubnlist *next;
-               char username[USERNAME_SIZE];
-               long usernum;
-       };
-
-       static struct ubnlist *u = NULL;
-       struct ubnlist *ptr = NULL;
-
-       /* Lazy programming here.  Call this function as a ForEachUser backend
-        * in order to queue up the room names, or call it with a null user
-        * to make it do the processing.
-        */
-       if (usbuf != NULL) {
-               ptr = (struct ubnlist *) malloc(sizeof (struct ubnlist));
-               if (ptr == NULL) return;
-
-               ptr->usernum = usbuf->usernum;
-               safestrncpy(ptr->username, usbuf->fullname, sizeof ptr->username);
-               ptr->next = u;
-               u = ptr;
-               return;
-       }
-
-       while (u != NULL) {
-               syslog(LOG_DEBUG, "user_ops: rebuilding usersbynumber index %10ld : %s", u->usernum, u->username);
-               cdb_store(CDB_USERSBYNUMBER, &u->usernum, sizeof(long), u->username, strlen(u->username)+1);
-               ptr = u;
-               u = u->next;
-               free(ptr);
-       }
-}
-
-
-/*
- * Rebuild the users-by-number index
- */
-void rebuild_usersbynumber(void) {
-       cdb_trunc(CDB_USERSBYNUMBER);                   /* delete the old indices */
-       ForEachUser(rebuild_ubn_for_user, NULL);        /* enumerate the users */
-       rebuild_ubn_for_user(NULL, NULL);               /* and index them */
-}
-
-
-/*
- * getuserbyuid()      Get user by system uid (for PAM mode authentication)
- *                     Returns 0 if user was found
- *                     This now uses an extauth index.
- */
-int getuserbyuid(struct ctdluser *usbuf, uid_t number)
-{
-       struct cdbdata *cdbextauth;
-       long usernum = 0;
-       StrBuf *claimed_id;
-
-       claimed_id = NewStrBuf();
-       StrBufPrintf(claimed_id, "uid:%d", number);
-       cdbextauth = cdb_fetch(CDB_EXTAUTH, ChrPtr(claimed_id), StrLength(claimed_id));
-       FreeStrBuf(&claimed_id);
-       if (cdbextauth == NULL) {
-               return(-1);
-       }
-
-       memcpy(&usernum, cdbextauth->ptr, sizeof(long));
-       cdb_free(cdbextauth);
-
-       if (!CtdlGetUserByNumber(usbuf, usernum)) {
-               return(0);
-       }
-
-       return(-1);
-}
-
-
-/*
- * Back end for cmd_user() and its ilk
- *
- * NOTE: "authname" should only be used if we are attempting to use the "master user" feature
- */
-int CtdlLoginExistingUser(char *authname, const char *trythisname)
-{
-       char username[SIZ];
-       int found_user;
-
-       syslog(LOG_DEBUG, "user_ops: CtdlLoginExistingUser(%s, %s)", authname, trythisname);
-
-       if ((CC->logged_in)) {
-               return login_already_logged_in;
-       }
-
-       if (trythisname == NULL) return login_not_found;
-       
-       if (!strncasecmp(trythisname, "SYS_", 4))
-       {
-               syslog(LOG_DEBUG, "user_ops: system user \"%s\" is not allowed to log in.", trythisname);
-               return login_not_found;
-       }
-
-       /* If a "master user" is defined, handle its authentication if specified */
-       CC->is_master = 0;
-       if (    (!IsEmptyStr(CtdlGetConfigStr("c_master_user"))) && 
-               (!IsEmptyStr(CtdlGetConfigStr("c_master_pass"))) &&
-               (authname != NULL) &&
-               (!strcasecmp(authname, CtdlGetConfigStr("c_master_user"))) )
-       {
-               CC->is_master = 1;
-       }
-
-       /* Continue attempting user validation... */
-       safestrncpy(username, trythisname, sizeof (username));
-       striplt(username);
-
-       if (IsEmptyStr(username)) {
-               return login_not_found;
-       }
-
-       if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
-
-               /* host auth mode */
-
-               struct passwd pd;
-               struct passwd *tempPwdPtr;
-               char pwdbuffer[256];
-       
-               syslog(LOG_DEBUG, "user_ops: asking host about <%s>", username);
-#ifdef HAVE_GETPWNAM_R
-#ifdef SOLARIS_GETPWUID
-               syslog(LOG_DEBUG, "user_ops: calling getpwnam_r()");
-               tempPwdPtr = getpwnam_r(username, &pd, pwdbuffer, sizeof pwdbuffer);
-#else // SOLARIS_GETPWUID
-               syslog(LOG_DEBUG, "user_ops: calling getpwnam_r()");
-               getpwnam_r(username, &pd, pwdbuffer, sizeof pwdbuffer, &tempPwdPtr);
-#endif // SOLARIS_GETPWUID
-#else // HAVE_GETPWNAM_R
-               syslog(LOG_DEBUG, "user_ops: SHOULD NEVER GET HERE!!!");
-               tempPwdPtr = NULL;
-#endif // HAVE_GETPWNAM_R
-               if (tempPwdPtr == NULL) {
-                       syslog(LOG_DEBUG, "user_ops: no such user <%s>", username);
-                       return login_not_found;
-               }
-       
-               /* Locate the associated Citadel account.  If not found, make one attempt to create it. */
-               found_user = getuserbyuid(&CC->user, pd.pw_uid);
-               if (found_user != 0) {
-                       create_user(username, CREATE_USER_DO_NOT_BECOME_USER, pd.pw_uid);
-                       found_user = getuserbyuid(&CC->user, pd.pw_uid);
-               }
-               syslog(LOG_DEBUG, "user_ops: found it: uid=%ld, gecos=%s here: %d", (long)pd.pw_uid, pd.pw_gecos, found_user);
-
-       }
-
-#ifdef HAVE_LDAP
-       else if ((CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP) || (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD)) {
-       
-               /* LDAP auth mode */
-
-               uid_t ldap_uid;
-               char ldap_cn[256];
-               char ldap_dn[256];
-
-               found_user = CtdlTryUserLDAP(username, ldap_dn, sizeof ldap_dn, ldap_cn, sizeof ldap_cn, &ldap_uid);
-               if (found_user != 0) {
-                       return login_not_found;
-               }
-
-               found_user = getuserbyuid(&CC->user, ldap_uid);
-               if (found_user != 0) {
-                       create_user(ldap_cn, CREATE_USER_DO_NOT_BECOME_USER, ldap_uid);
-                       found_user = getuserbyuid(&CC->user, ldap_uid);
-               }
-
-               if (found_user == 0) {
-                       if (CC->ldap_dn != NULL) free(CC->ldap_dn);
-                       CC->ldap_dn = strdup(ldap_dn);
-               }
-
-       }
-#endif
-
-       else {
-               /* native auth mode */
-
-               recptypes *valid = NULL;
-       
-               /* First, try to log in as if the supplied name is a display name */
-               found_user = CtdlGetUser(&CC->user, username);
-       
-               /* If that didn't work, try to log in as if the supplied name * is an e-mail address */
-               if (found_user != 0) {
-                       valid = validate_recipients(username, NULL, 0);
-                       if (valid != NULL) {
-                               if (valid->num_local == 1) {
-                                       found_user = CtdlGetUser(&CC->user, valid->recp_local);
-                               }
-                               free_recipients(valid);
-                       }
-               }
-       }
-
-       /* Did we find something? */
-       if (found_user == 0) {
-               if (((CC->nologin)) && (CC->user.axlevel < AxAideU)) {
-                       return login_too_many_users;
-               } else {
-                       safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
-                       return login_ok;
-               }
-       }
-       return login_not_found;
-}
-
-
-/*
- * session startup code which is common to both cmd_pass() and cmd_newu()
- */
-void do_login(void)
-{
-       CC->logged_in = 1;
-       syslog(LOG_NOTICE, "user_ops: <%s> logged in", CC->curr_user);
-
-       CtdlGetUserLock(&CC->user, CC->curr_user);
-       ++(CC->user.timescalled);
-       CC->previous_login = CC->user.lastcall;
-       time(&CC->user.lastcall);
-
-       /* If this user's name is the name of the system administrator
-        * (as specified in setup), automatically assign access level 6.
-        */
-       if ( (!IsEmptyStr(CtdlGetConfigStr("c_sysadm"))) && (!strcasecmp(CC->user.fullname, CtdlGetConfigStr("c_sysadm"))) ) {
-               CC->user.axlevel = AxAideU;
-       }
-
-       /* If we're authenticating off the host system, automatically give root the highest level of access. */
-       if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
-               if (CC->user.uid == 0) {
-                       CC->user.axlevel = AxAideU;
-               }
-       }
-       CtdlPutUserLock(&CC->user);
-
-       /* If we are using LDAP authentication, extract the user's email addresses from the directory. */
-#ifdef HAVE_LDAP
-       if ((CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP) || (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD)) {
-               char new_emailaddrs[512];
-               if (CtdlGetConfigInt("c_ldap_sync_email_addrs") > 0) {
-                       if (extract_email_addresses_from_ldap(CC->ldap_dn, new_emailaddrs) == 0) {
-                               CtdlSetEmailAddressesForUser(CC->user.fullname, new_emailaddrs);
-                       }
-               }
-       }
-#endif
-
-       /* If the user does not have any email addresses assigned, generate one. */
-       if (IsEmptyStr(CC->user.emailaddrs)) {
-               AutoGenerateEmailAddressForUser(&CC->user);
-       }
-
-       /*
-        * Populate cs_inet_email and cs_inet_other_emails with valid email addresses from the user record
-        */
-       strcpy(CC->cs_inet_email, CC->user.emailaddrs);
-       char *firstsep = strstr(CC->cs_inet_email, "|");
-       if (firstsep) {
-               strcpy(CC->cs_inet_other_emails, firstsep+1);
-               *firstsep = 0;
-       }
-       else {
-               CC->cs_inet_other_emails[0] = 0;
-       }
-
-       /* Create any personal rooms required by the system.
-        * (Technically, MAILROOM should be there already, but just in case...)
-        */
-       CtdlCreateRoom(MAILROOM, 4, "", 0, 1, 0, VIEW_MAILBOX);
-       CtdlCreateRoom(SENTITEMS, 4, "", 0, 1, 0, VIEW_MAILBOX);
-       CtdlCreateRoom(USERTRASHROOM, 4, "", 0, 1, 0, VIEW_MAILBOX);
-       CtdlCreateRoom(USERDRAFTROOM, 4, "", 0, 1, 0, VIEW_MAILBOX);
-
-       /* Run any startup routines registered by loadable modules */
-       PerformSessionHooks(EVT_LOGIN);
-
-       /* Enter the lobby */
-       CtdlUserGoto(CtdlGetConfigStr("c_baseroom"), 0, 0, NULL, NULL, NULL, NULL);
-}
-
-
-void logged_in_response(void)
-{
-       cprintf("%d %s|%d|%ld|%ld|%u|%ld|%ld\n",
-               CIT_OK, CC->user.fullname, CC->user.axlevel,
-               CC->user.timescalled, CC->user.posted,
-               CC->user.flags, CC->user.usernum,
-               CC->previous_login
-       );
-}
-
-
-void CtdlUserLogout(void)
-{
-       CitContext *CCC = MyContext();
-
-       syslog(LOG_DEBUG, "user_ops: CtdlUserLogout() logging out <%s> from session %d", CCC->curr_user, CCC->cs_pid);
-
-       /* Run any hooks registered by modules... */
-       PerformSessionHooks(EVT_LOGOUT);
-       
-       /*
-        * Clear out some session data.  Most likely, the CitContext for this
-        * session is about to get nuked when the session disconnects, but
-        * since it's possible to log in again without reconnecting, we cannot
-        * make that assumption.
-        */
-       strcpy(CCC->fake_username, "");
-       strcpy(CCC->fake_hostname, "");
-       strcpy(CCC->fake_roomname, "");
-       CCC->logged_in = 0;
-
-       /* Check to see if the user was deleted whilst logged in and purge them if necessary */
-       if ((CCC->user.axlevel == AxDeleted) && (CCC->user.usernum)) {
-               purge_user(CCC->user.fullname);
-       }
-
-       /* Clear out the user record in memory so we don't behave like a ghost */
-       memset(&CCC->user, 0, sizeof(struct ctdluser));
-       CCC->curr_user[0] = 0;
-       CCC->is_master = 0;
-       CCC->cs_inet_email[0] = 0;
-       CCC->cs_inet_other_emails[0] = 0;
-       CCC->cs_inet_fn[0] = 0;
-       CCC->fake_username[0] = 0;
-       CCC->fake_hostname[0] = 0;
-       CCC->fake_roomname[0] = 0;
-
-       /* Free any output buffers */
-       unbuffer_output();
-}
-
-
-/*
- * Validate a password on the host unix system by talking to the chkpwd daemon
- */
-static int validpw(uid_t uid, const char *pass)
-{
-       char buf[256];
-       int rv = 0;
-
-       if (IsEmptyStr(pass)) {
-               syslog(LOG_DEBUG, "user_ops: refusing to chkpwd for uid=%d with empty password", uid);
-               return 0;
-       }
-
-       syslog(LOG_DEBUG, "user_ops: validating password for uid=%d using chkpwd...", uid);
-
-       begin_critical_section(S_CHKPWD);
-       rv = write(chkpwd_write_pipe[1], &uid, sizeof(uid_t));
-       if (rv == -1) {
-               syslog(LOG_ERR, "user_ops: communication with chkpwd broken: %m");
-               end_critical_section(S_CHKPWD);
-               return 0;
-       }
-       rv = write(chkpwd_write_pipe[1], pass, 256);
-       if (rv == -1) {
-               syslog(LOG_ERR, "user_ops: communication with chkpwd broken: %m");
-               end_critical_section(S_CHKPWD);
-               return 0;
-       }
-       rv = read(chkpwd_read_pipe[0], buf, 4);
-       if (rv == -1) {
-               syslog(LOG_ERR, "user_ops: ommunication with chkpwd broken: %m");
-               end_critical_section(S_CHKPWD);
-               return 0;
-       }
-       end_critical_section(S_CHKPWD);
-
-       if (!strncmp(buf, "PASS", 4)) {
-               syslog(LOG_DEBUG, "user_ops: chkpwd pass");
-               return(1);
-       }
-
-       syslog(LOG_DEBUG, "user_ops: chkpwd fail");
-       return 0;
-}
-
-
-/* 
- * Start up the chkpwd daemon so validpw() has something to talk to
- */
-void start_chkpwd_daemon(void) {
-       pid_t chkpwd_pid;
-       struct stat filestats;
-       int i;
-
-       syslog(LOG_DEBUG, "user_ops: starting chkpwd daemon for host authentication mode");
-
-       if ((stat(file_chkpwd, &filestats)==-1) || (filestats.st_size==0)) {
-               syslog(LOG_ERR, "user_ops: %s: %m", file_chkpwd);
-               abort();
-       }
-       if (pipe(chkpwd_write_pipe) != 0) {
-               syslog(LOG_ERR, "user_ops: unable to create pipe for chkpwd daemon: %m");
-               abort();
-       }
-       if (pipe(chkpwd_read_pipe) != 0) {
-               syslog(LOG_ERR, "user_ops: unable to create pipe for chkpwd daemon: %m");
-               abort();
-       }
-
-       chkpwd_pid = fork();
-       if (chkpwd_pid < 0) {
-               syslog(LOG_ERR, "user_ops: unable to fork chkpwd daemon: %m");
-               abort();
-       }
-       if (chkpwd_pid == 0) {
-               dup2(chkpwd_write_pipe[0], 0);
-               dup2(chkpwd_read_pipe[1], 1);
-               for (i=2; i<256; ++i) close(i);
-               execl(file_chkpwd, file_chkpwd, NULL);
-               syslog(LOG_ERR, "user_ops: unable to exec chkpwd daemon: %m");
-               abort();
-               exit(errno);
-       }
-}
-
-
-int CtdlTryPassword(const char *password, long len)
-{
-       int code;
-       CitContext *CCC = CC;
-
-       if ((CCC->logged_in)) {
-               syslog(LOG_WARNING, "user_ops: CtdlTryPassword: already logged in");
-               return pass_already_logged_in;
-       }
-       if (!strcmp(CCC->curr_user, NLI)) {
-               syslog(LOG_WARNING, "user_ops: CtdlTryPassword: no user selected");
-               return pass_no_user;
-       }
-       if (CtdlGetUser(&CCC->user, CCC->curr_user)) {
-               syslog(LOG_ERR, "user_ops: CtdlTryPassword: internal error");
-               return pass_internal_error;
-       }
-       if (password == NULL) {
-               syslog(LOG_INFO, "user_ops: CtdlTryPassword: NULL password string supplied");
-               return pass_wrong_password;
-       }
-
-       if (CCC->is_master) {
-               code = strcmp(password, CtdlGetConfigStr("c_master_pass"));
-       }
-
-       else if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
-
-               /* host auth mode */
-
-               if (validpw(CCC->user.uid, password)) {
-                       code = 0;
-
-                       /*
-                        * sooper-seekrit hack: populate the password field in the
-                        * citadel database with the password that the user typed,
-                        * if it's correct.  This allows most sites to convert from
-                        * host auth to native auth if they want to.  If you think
-                        * this is a security hazard, comment it out.
-                        */
-
-                       CtdlGetUserLock(&CCC->user, CCC->curr_user);
-                       safestrncpy(CCC->user.password, password, sizeof CCC->user.password);
-                       CtdlPutUserLock(&CCC->user);
-
-                       /*
-                        * (sooper-seekrit hack ends here)
-                        */
-               }
-               else {
-                       code = (-1);
-               }
-       }
-
-#ifdef HAVE_LDAP
-       else if ((CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP) || (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD)) {
-
-               /* LDAP auth mode */
-
-               if ((CCC->ldap_dn) && (!CtdlTryPasswordLDAP(CCC->ldap_dn, password))) {
-                       code = 0;
-               }
-               else {
-                       code = (-1);
-               }
-       }
-#endif
-
-       else {
-
-               /* native auth mode */
-               char *pw;
-
-               pw = (char*) malloc(len + 1);
-               memcpy(pw, password, len + 1);
-               strproc(pw);
-               strproc(CCC->user.password);
-               code = strcasecmp(CCC->user.password, pw);
-               if (code != 0) {
-                       strproc(pw);
-                       strproc(CCC->user.password);
-                       code = strcasecmp(CCC->user.password, pw);
-               }
-               free (pw);
-       }
-
-       if (!code) {
-               do_login();
-               return pass_ok;
-       }
-       else {
-               syslog(LOG_WARNING, "user_ops: bad password specified for <%s> Service <%s> Port <%ld> Remote <%s / %s>",
-                       CCC->curr_user,
-                       CCC->ServiceName,
-                       CCC->tcp_port,
-                       CCC->cs_host,
-                       CCC->cs_addr
-               );
-               return pass_wrong_password;
-       }
-}
-
-
-/*
- * Delete a user record *and* all of its related resources.
- */
-int purge_user(char pname[])
-{
-       struct ctdluser usbuf;
-       char usernamekey[USERNAME_SIZE];
-
-       makeuserkey(usernamekey, pname, cutuserkey(pname));
-
-       /* If the name is empty we can't find them in the DB any way so just return */
-       if (IsEmptyStr(pname))
-               return(ERROR + NO_SUCH_USER);
-
-       if (CtdlGetUser(&usbuf, pname) != 0) {
-               syslog(LOG_ERR, "user_ops: cannot purge user <%s> - not found", pname);
-               return(ERROR + NO_SUCH_USER);
-       }
-
-       /* Don't delete a user who is currently logged in.  Instead, just
-        * set the access level to 0, and let the account get swept up
-        * during the next purge.
-        */
-       if (CtdlIsUserLoggedInByNum(usbuf.usernum)) {
-               syslog(LOG_WARNING, "user_ops: <%s> is logged in; not deleting", pname);
-               usbuf.axlevel = AxDeleted;
-               CtdlPutUser(&usbuf);
-               return(1);
-       }
-
-       syslog(LOG_NOTICE, "user_ops: deleting <%s>", pname);
-
-       /* Perform any purge functions registered by server extensions */
-       PerformUserHooks(&usbuf, EVT_PURGEUSER);
-
-       /* delete any existing user/room relationships */
-       cdb_delete(CDB_VISIT, &usbuf.usernum, sizeof(long));
-
-       /* delete the users-by-number index record */
-       cdb_delete(CDB_USERSBYNUMBER, &usbuf.usernum, sizeof(long));
-
-       /* delete the userlog entry */
-       cdb_delete(CDB_USERS, usernamekey, strlen(usernamekey));
-
-       return(0);
-}
-
-
-int internal_create_user(char *username, struct ctdluser *usbuf, uid_t uid)
-{
-       if (!CtdlGetUser(usbuf, username)) {
-               return(ERROR + ALREADY_EXISTS);
-       }
-
-       /* Go ahead and initialize a new user record */
-       memset(usbuf, 0, sizeof(struct ctdluser));
-       safestrncpy(usbuf->fullname, username, sizeof usbuf->fullname);
-       strcpy(usbuf->password, "");
-       usbuf->uid = uid;
-
-       /* These are the default flags on new accounts */
-       usbuf->flags = US_LASTOLD | US_DISAPPEAR | US_PAGINATOR | US_FLOORS;
-
-       usbuf->timescalled = 0;
-       usbuf->posted = 0;
-       usbuf->axlevel = CtdlGetConfigInt("c_initax");
-       usbuf->lastcall = time(NULL);
-
-       /* fetch a new user number */
-       usbuf->usernum = get_new_user_number();
-
-       /* add user to the database */
-       CtdlPutUser(usbuf);
-       cdb_store(CDB_USERSBYNUMBER, &usbuf->usernum, sizeof(long), usbuf->fullname, strlen(usbuf->fullname)+1);
-
-       /* If non-native auth, index by uid */
-       if ((usbuf->uid > 0) && (usbuf->uid != NATIVE_AUTH_UID)) {
-               StrBuf *claimed_id = NewStrBuf();
-               StrBufPrintf(claimed_id, "uid:%d", usbuf->uid);
-               attach_extauth(usbuf, claimed_id);
-               FreeStrBuf(&claimed_id);
-       }
-
-       return(0);
-}
-
-
-/*
- * create_user()  -  back end processing to create a new user
- *
- * Set 'newusername' to the desired account name.
- * Set 'become_user' to CREATE_USER_BECOME_USER if this is self-service account creation and we want to
- *                   actually log in as the user we just created, otherwise set it to CREATE_USER_DO_NOT_BECOME_USER
- * Set 'uid' to some uid_t value to associate the account with an external auth user, or (-1) for native auth
- */
-int create_user(char *username, int become_user, uid_t uid)
-{
-       struct ctdluser usbuf;
-       struct ctdlroom qrbuf;
-       char mailboxname[ROOMNAMELEN];
-       char buf[SIZ];
-       int retval;
-
-       strproc(username);
-       if ((retval = internal_create_user(username, &usbuf, uid)) != 0) {
-               return retval;
-       }
-
-       /*
-        * Give the user a private mailbox and a configuration room.
-        * Make the latter an invisible system room.
-        */
-       CtdlMailboxName(mailboxname, sizeof mailboxname, &usbuf, MAILROOM);
-       CtdlCreateRoom(mailboxname, 5, "", 0, 1, 1, VIEW_MAILBOX);
-
-       CtdlMailboxName(mailboxname, sizeof mailboxname, &usbuf, USERCONFIGROOM);
-       CtdlCreateRoom(mailboxname, 5, "", 0, 1, 1, VIEW_BBS);
-       if (CtdlGetRoomLock(&qrbuf, mailboxname) == 0) {
-               qrbuf.QRflags2 |= QR2_SYSTEM;
-               CtdlPutRoomLock(&qrbuf);
-       }
-
-       /* Perform any create functions registered by server extensions */
-       PerformUserHooks(&usbuf, EVT_NEWUSER);
-
-       /* Everything below this line can be bypassed if administratively
-        * creating a user, instead of doing self-service account creation
-        */
-
-       if (become_user == CREATE_USER_BECOME_USER) {
-               /* Now become the user we just created */
-               memcpy(&CC->user, &usbuf, sizeof(struct ctdluser));
-               safestrncpy(CC->curr_user, username, sizeof CC->curr_user);
-               do_login();
-       
-               /* Check to make sure we're still who we think we are */
-               if (CtdlGetUser(&CC->user, CC->curr_user)) {
-                       return(ERROR + INTERNAL_ERROR);
-               }
-       }
-       
-       snprintf(buf, SIZ, 
-               "New user account <%s> has been created, from host %s [%s].\n",
-               username,
-               CC->cs_host,
-               CC->cs_addr
-       );
-       CtdlAideMessage(buf, "User Creation Notice");
-       syslog(LOG_NOTICE, "user_ops: <%s> created", username);
-       return(0);
-}
-
-
-/*
- * set password - back end api code
- */
-void CtdlSetPassword(char *new_pw)
-{
-       CtdlGetUserLock(&CC->user, CC->curr_user);
-       safestrncpy(CC->user.password, new_pw, sizeof(CC->user.password));
-       CtdlPutUserLock(&CC->user);
-       syslog(LOG_INFO, "user_ops: password changed for <%s>", CC->curr_user);
-       PerformSessionHooks(EVT_SETPASS);
-}
-
-
-/*
- * API function for cmd_invt_kick() and anything else that needs to
- * invite or kick out a user to/from a room.
- * 
- * Set iuser to the name of the user, and op to 1=invite or 0=kick
- */
-int CtdlInvtKick(char *iuser, int op) {
-       struct ctdluser USscratch;
-       visit vbuf;
-       char bbb[SIZ];
-
-       if (CtdlGetUser(&USscratch, iuser) != 0) {
-               return(1);
-       }
-
-       CtdlGetRelationship(&vbuf, &USscratch, &CC->room);
-       if (op == 1) {
-               vbuf.v_flags = vbuf.v_flags & ~V_FORGET & ~V_LOCKOUT;
-               vbuf.v_flags = vbuf.v_flags | V_ACCESS;
-       }
-       if (op == 0) {
-               vbuf.v_flags = vbuf.v_flags & ~V_ACCESS;
-               vbuf.v_flags = vbuf.v_flags | V_FORGET | V_LOCKOUT;
-       }
-       CtdlSetRelationship(&vbuf, &USscratch, &CC->room);
-
-       /* post a message in Aide> saying what we just did */
-       snprintf(bbb, sizeof bbb, "%s has been %s \"%s\" by %s.\n",
-               iuser,
-               ((op == 1) ? "invited to" : "kicked out of"),
-               CC->room.QRname,
-               (CC->logged_in ? CC->user.fullname : "an administrator")
-       );
-       CtdlAideMessage(bbb,"User Admin Message");
-       return(0);
-}
-
-
-/*
- * Forget (Zap) the current room (API call)
- * Returns 0 on success
- */
-int CtdlForgetThisRoom(void) {
-       visit vbuf;
-
-       /* On some systems, Admins are not allowed to forget rooms */
-       if (is_aide() && (CtdlGetConfigInt("c_aide_zap") == 0)
-          && ((CC->room.QRflags & QR_MAILBOX) == 0)  ) {
-               return(1);
-       }
-
-       CtdlGetUserLock(&CC->user, CC->curr_user);
-       CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
-
-       vbuf.v_flags = vbuf.v_flags | V_FORGET;
-       vbuf.v_flags = vbuf.v_flags & ~V_ACCESS;
-
-       CtdlSetRelationship(&vbuf, &CC->user, &CC->room);
-       CtdlPutUserLock(&CC->user);
-
-       /* Return to the Lobby, so we don't end up in an undefined room */
-       CtdlUserGoto(CtdlGetConfigStr("c_baseroom"), 0, 0, NULL, NULL, NULL, NULL);
-       return(0);
-}
-
-
-/* 
- *  Traverse the user file...
- */
-void ForEachUser(void (*CallBack) (struct ctdluser * EachUser, void *out_data),
-                void *in_data)
-{
-       struct ctdluser usbuf;
-       struct cdbdata *cdbus;
-
-       cdb_rewind(CDB_USERS);
-
-       while (cdbus = cdb_next_item(CDB_USERS), cdbus != NULL) {
-               memset(&usbuf, 0, sizeof(struct ctdluser));
-               memcpy(&usbuf, cdbus->ptr,
-                      ((cdbus->len > sizeof(struct ctdluser)) ?
-                       sizeof(struct ctdluser) : cdbus->len));
-               cdb_free(cdbus);
-               (*CallBack) (&usbuf, in_data);
-       }
-}
-
-
-/*
- * List one user (this works with cmd_list)
- */
-void ListThisUser(struct ctdluser *usbuf, void *data)
-{
-       char *searchstring;
-
-       searchstring = (char *)data;
-       if (bmstrcasestr(usbuf->fullname, searchstring) == NULL) {
-               return;
-       }
-
-       if (usbuf->axlevel > AxDeleted) {
-               if ((CC->user.axlevel >= AxAideU)
-                   || ((usbuf->flags & US_UNLISTED) == 0)
-                   || ((CC->internal_pgm))) {
-                       cprintf("%s|%d|%ld|%ld|%ld|%ld||\n",
-                               usbuf->fullname,
-                               usbuf->axlevel,
-                               usbuf->usernum,
-                               (long)usbuf->lastcall,
-                               usbuf->timescalled,
-                               usbuf->posted);
-               }
-       }
-}
-
-
-/*
- * Count the number of new mail messages the user has
- */
-int NewMailCount()
-{
-       int num_newmsgs = 0;
-       num_newmsgs = CC->newmail;
-       CC->newmail = 0;
-       return(num_newmsgs);
-}
-
-
-/*
- * Count the number of new mail messages the user has
- */
-int InitialMailCheck()
-{
-       int num_newmsgs = 0;
-       int a;
-       char mailboxname[ROOMNAMELEN];
-       struct ctdlroom mailbox;
-       visit vbuf;
-       struct cdbdata *cdbfr;
-       long *msglist = NULL;
-       int num_msgs = 0;
-
-       CtdlMailboxName(mailboxname, sizeof mailboxname, &CC->user, MAILROOM);
-       if (CtdlGetRoom(&mailbox, mailboxname) != 0)
-               return(0);
-       CtdlGetRelationship(&vbuf, &CC->user, &mailbox);
-
-       cdbfr = cdb_fetch(CDB_MSGLISTS, &mailbox.QRnumber, sizeof(long));
-
-       if (cdbfr != NULL) {
-               msglist = malloc(cdbfr->len);
-               memcpy(msglist, cdbfr->ptr, cdbfr->len);
-               num_msgs = cdbfr->len / sizeof(long);
-               cdb_free(cdbfr);
-       }
-       if (num_msgs > 0)
-               for (a = 0; a < num_msgs; ++a) {
-                       if (msglist[a] > 0L) {
-                               if (msglist[a] > vbuf.v_lastseen) {
-                                       ++num_newmsgs;
-                               }
-                       }
-               }
-       if (msglist != NULL)
-               free(msglist);
-
-       return(num_newmsgs);
-}