oops

[citadel.git] / citadel / utils / setup.c

/*
 * Citadel setup utility
 *
 * Copyright (c) 1987-2019 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.
 */

#define SHOW_ME_VAPPEND_PRINTF
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <signal.h>
#include <netdb.h>
#include <errno.h>
#include <limits.h>
#include <pwd.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <assert.h>
#include <libcitadel.h>
#include "citadel.h"
#include "axdefs.h"
#include "sysdep.h"
#include "citadel_dirs.h"

#ifdef ENABLE_NLS
#ifdef HAVE_XLOCALE_H
#include <xlocale.h>
#endif
#include <libintl.h>
#include <locale.h>
#define _(string)       gettext(string)
#else
#define _(string)       (string)
#endif

#define UI_TEXT         0       /* Default setup type -- text only */
#define UI_DIALOG       2       /* Use the 'whiptail' or 'dialog' program */
#define UI_SILENT       3       /* Silent running, for use in scripts */

#define SERVICE_NAME    "citadel"
#define PROTO_NAME      "tcp"
#define NSSCONF         "/etc/nsswitch.conf"

typedef enum _SetupStep {
        eCitadelHomeDir = 0,
        eSysAdminName = 1,
        eSysAdminPW = 2,
        eUID = 3,
        eIP_ADDR = 4,
        eCTDL_Port = 5,
        eAuthType = 6,
        eLDAP_Host = 7,
        eLDAP_Port = 8,
        eLDAP_Base_DN = 9,
        eLDAP_Bind_DN = 10,
        eLDAP_Bind_PW = 11,
        eMaxQuestions = 12
} eSetupStep;

///"CREATE_XINETD_ENTRY";
/* Environment variables, don't translate! */
const char *EnvNames [eMaxQuestions] = {
        "HOME_DIRECTORY",
        "SYSADMIN_NAME",
        "SYSADMIN_PW",
        "CITADEL_UID",
        "IP_ADDR",
        "CITADEL_PORT",
        "ENABLE_UNIX_AUTH",
        "LDAP_HOST",
        "LDAP_PORT",
        "LDAP_BASE_DN",
        "LDAP_BIND_DN",
        "LDAP_BIND_PW"
};

int setup_type = (-1);
int enable_home = 1;
char admin_name[SIZ];
char admin_pass[SIZ];
char admin_cmd[SIZ];
int serv_sock = (-1) ;

const char *setup_titles[eMaxQuestions];
const char *setup_text[eMaxQuestions];

char *program_title;

void SetTitles(void)
{
        int have_run_dir;
#ifndef HAVE_RUN_DIR
        have_run_dir = 1;
#else
        have_run_dir = 0;
#endif

#ifdef ENABLE_NLS
        setlocale(LC_MESSAGES, getenv("LANG"));

        bindtextdomain("citadel-setup", LOCALEDIR"/locale");
        textdomain("citadel-setup");
        bind_textdomain_codeset("citadel-setup","UTF8");
#endif

        setup_titles[eCitadelHomeDir] = _("Citadel Home Directory");
        if (have_run_dir)
                setup_text[eCitadelHomeDir] = _(
"Enter the full pathname of the directory in which the Citadel\n"
"installation you are creating or updating resides.  If you\n"
"specify a directory other than the default, you will need to\n"
"specify the -h flag to the server when you start it up.\n");
        else
                setup_text[eCitadelHomeDir] = _(
"Enter the subdirectory name for an alternate installation of "
"Citadel. To do a default installation just leave it blank."
"If you specify a directory other than the default, you will need to\n"
"specify the -h flag to the server when you start it up.\n"
"note that it may not have a leading /");


        setup_titles[eSysAdminName] = _("Citadel administrator username:");
        setup_text[eSysAdminName] = _(
"Please enter the name of the Citadel user account that should be granted "
"administrative privileges once created. If using internal authentication "
"this user account will be created if it does not exist. For external "
"authentication this user account has to exist.");


        setup_titles[eSysAdminPW] = _("Administrator password:");
        setup_text[eSysAdminPW] = _(
"Enter a password for the system administrator. When setup\n"
"completes it will attempt to create the administrator user\n"
"and set the password specified here.\n");

        setup_titles[eUID] = _("Citadel User ID:");
        setup_text[eUID] = _(
"Citadel needs to run under its own user ID.  This would\n"
"typically be called \"citadel\", but if you are running Citadel\n"
"as a public site, you might also call it \"bbs\" or \"guest\".\n"
"The server will run under this user ID.  Please specify that\n"
"user ID here.  You may specify either a user name or a numeric\n"
"UID.\n");

        setup_titles[eIP_ADDR] = _("Listening address for the Citadel server:");
        setup_text[eIP_ADDR] = _(
"Please specify the IP address which the server should be listening to. "
"You can name a specific IPv4 or IPv6 address, or you can specify\n"
"\"*\" for \"any address\", \"::\" for \"any IPv6 address\", or \"0.0.0.0\"\n"
"for \"any IPv4 address\". If you leave this blank, Citadel will\n"
"listen on all addresses. "
"This can usually be left to the default unless multiple instances of Citadel "
"are running on the same computer.");

        setup_titles[eCTDL_Port] = _("Server port number:");
        setup_text[eCTDL_Port] = _(
"Specify the TCP port number on which your server will run.\n"
"Normally, this will be port 504, which is the official port\n"
"assigned by the IANA for Citadel servers.  You will only need\n"
"to specify a different port number if you run multiple instances\n"
"of Citadel on the same computer and there is something else\n"
"already using port 504.\n");

        setup_titles[eAuthType] = _("Authentication method to use:");
        setup_text[eAuthType] = _(
"Please choose the user authentication mode. By default Citadel will use its "
"own internal user accounts database. If you choose Host, Citadel users will "
"have accounts on the host system, authenticated via /etc/passwd or a PAM "
"source. LDAP chooses an RFC 2307 compliant directory server, the last option "
"chooses the nonstandard MS Active Directory LDAP scheme."
"\n"
"Do not change this option unless you are sure it is required, since changing "
"back requires a full reinstall of Citadel."
"\n"
" 0. Self contained authentication\n"
" 1. Host system integrated authentication\n"
" 2. External LDAP - RFC 2307 POSIX schema\n"
" 3. External LDAP - MS Active Directory schema\n"
"\n"
"For help: http://www.citadel.org/doku.php/faq:installation:authmodes\n"
"\n"
"ANSWER \"0\" UNLESS YOU COMPLETELY UNDERSTAND THIS OPTION.\n");

        setup_titles[eLDAP_Host] = _("LDAP host:");
        setup_text[eLDAP_Host] = _(
"Please enter the host name or IP address of your LDAP server.\n");

        setup_titles[eLDAP_Port] = _("LDAP port number:");
        setup_text[eLDAP_Port] = _(
"Please enter the port number of the LDAP service (usually 389).\n");

        setup_titles[eLDAP_Base_DN] = _("LDAP base DN:");
        setup_text[eLDAP_Base_DN] = _(
"Please enter the Base DN to search for authentication\n"
"(for example: dc=example,dc=com)\n");

        setup_titles[eLDAP_Bind_DN] = _("LDAP bind DN:");
        setup_text[eLDAP_Bind_DN] = _(
"Please enter the DN of an account to use for binding to the LDAP server for "
"performing queries. The account does not require any other privileges. If "
"your LDAP server allows anonymous queries, you can leave this blank.\n");

        setup_titles[eLDAP_Bind_PW] = _("LDAP bind password:");
        setup_text[eLDAP_Bind_PW] = _(
"If you entered a Bind DN in the previous question, you must now enter\n"
"the password associated with that account.  Otherwise, you can leave this\n"
"blank.\n");

#if 0
// Debug loading of locales... Strace does a better job though.
        printf("Message catalog directory: %s\n", bindtextdomain("citadel-setup", LOCALEDIR"/locale"));
        printf("Text domain: %s\n", textdomain("citadel-setup"));
        printf("Text domain Charset: %s\n", bind_textdomain_codeset("citadel-setup","UTF8"));
        {
                int i;
                for (i = 0; i < eMaxQuestions; i++)
                        printf("%s - %s\n", setup_titles[i], _(setup_titles[i]));
                exit(0);
        }
#endif
}



void title(const char *text)
{
        if (setup_type == UI_TEXT) {
                printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n<%s>\n", text);
        }
}



int yesno(const char *question, int default_value)
{
        int i = 0;
        int answer = 0;
        char buf[SIZ];

        switch (setup_type) {

        case UI_TEXT:
                do {
                        printf("%s\n%s [%s] --> ",
                               question,
                               _("Yes/No"),
                               ( default_value ? _("Yes") : _("No") )
                        );
                        if (fgets(buf, sizeof buf, stdin))
                        {
                                answer = tolower(buf[0]);
                                if ((buf[0]==0) || (buf[0]==13) || (buf[0]==10)) {
                                        answer = default_value;
                                }
                                else if (answer == 'y') {
                                        answer = 1;
                                }
                                else if (answer == 'n') {
                                        answer = 0;
                                }
                        }
                } while ((answer < 0) || (answer > 1));
                break;

        case UI_DIALOG:
                snprintf(buf, sizeof buf, "exec %s --backtitle '%s' %s --yesno '%s' 15 75",
                        getenv("CTDL_DIALOG"),
                        program_title,
                        ( default_value ? "" : "--defaultno" ),
                        question);
                i = system(buf);
                if (i == 0) {
                        answer = 1;
                }
                else {
                        answer = 0;
                }
                break;
        case UI_SILENT:
                break;
        }
        return (answer);
}


void important_message(const char *title, const char *msgtext)
{
        char buf[SIZ];

        switch (setup_type) {

        case UI_TEXT:
                printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
                printf("       %s \n\n%s\n\n", title, msgtext);
                printf("%s", _("Press return to continue..."));
                if (fgets(buf, sizeof buf, stdin))
                {;}
                break;

        case UI_DIALOG:
                snprintf(buf, sizeof buf, "exec %s --backtitle '%s' --msgbox '%s' 19 72",
                        getenv("CTDL_DIALOG"),
                        program_title,
                        msgtext);
                int rv = system(buf);
                if (rv != 0) {
                        fprintf(stderr, _("failed to run the dialog command\n"));
                }
                break;
        case UI_SILENT:
                fprintf(stderr, "%s\n", msgtext);
                break;
        }
}

void important_msgnum(int msgnum)
{
        important_message(_("Important Message"), setup_text[msgnum]);
}

void display_error(char *error_message_format, ...)
{
        StrBuf *Msg;
        va_list arg_ptr;

        Msg = NewStrBuf();
        va_start(arg_ptr, error_message_format);
        StrBufVAppendPrintf(Msg, error_message_format, arg_ptr);
        va_end(arg_ptr);

        important_message(_("Error"), ChrPtr(Msg));
        FreeStrBuf(&Msg);
}

void progress(char *text, long int curr, long int cmax)
{
        static long dots_printed = 0L;
        long a = 0;
        static FILE *fp = NULL;
        char buf[SIZ];

        switch (setup_type) {

        case UI_TEXT:
                if (curr == 0) {
                        printf("%s\n", text);
                        printf("....................................................");
                        printf("..........................\r");
                        dots_printed = 0;
                } else if (curr == cmax) {
                        printf("\r%79s\n", "");
                } else {
                        a = (curr * 100) / cmax;
                        a = a * 78;
                        a = a / 100;
                        while (dots_printed < a) {
                                printf("*");
                                ++dots_printed;
                        }
                }
                fflush(stdout);
                break;

        case UI_DIALOG:
                if (curr == 0) {
                        snprintf(buf, sizeof buf, "exec %s --backtitle '%s' --gauge '%s' 7 72 0",
                                getenv("CTDL_DIALOG"),
                                program_title,
                                text);
                        fp = popen(buf, "w");
                        if (fp != NULL) {
                                fprintf(fp, "0\n");
                                fflush(fp);
                        }
                } 
                else if (curr == cmax) {
                        if (fp != NULL) {
                                fprintf(fp, "100\n");
                                pclose(fp);
                                fp = NULL;
                        }
                }
                else {
                        a = (curr * 100) / cmax;
                        if (fp != NULL) {
                                fprintf(fp, "%ld\n", a);
                                fflush(fp);
                        }
                }
                break;
        case UI_SILENT:
                break;

        default:
                assert(1==0);   /* If we got here then the developer is a moron */
        }
}


int uds_connectsock(char *sockpath)
{
        int s;
        struct sockaddr_un addr;

        memset(&addr, 0, sizeof(addr));
        addr.sun_family = AF_UNIX;
        strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);

        s = socket(AF_UNIX, SOCK_STREAM, 0);
        if (s < 0) {
                return(-1);
        }

        if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
                close(s);
                return(-1);
        }

        return s;
}


/*
 * input binary data from socket
 */
void serv_read(char *buf, int bytes)
{
        int len, rlen;

        len = 0;
        while (len < bytes) {
                rlen = read(serv_sock, &buf[len], bytes - len);
                if (rlen < 1) {
                        return;
                }
                len = len + rlen;
        }
}


/*
 * send binary to server
 */
void serv_write(char *buf, int nbytes)
{
        int bytes_written = 0;
        int retval;
        while (bytes_written < nbytes) {
                retval = write(serv_sock, &buf[bytes_written], nbytes - bytes_written);
                if (retval < 1) {
                        return;
                }
                bytes_written = bytes_written + retval;
        }
}



/*
 * input string from socket - implemented in terms of serv_read()
 */
void serv_gets(char *buf)
{
        int i;

        /* Read one character at a time.
         */
        for (i = 0;; i++) {
                serv_read(&buf[i], 1);
                if (buf[i] == '\n' || i == (SIZ-1))
                        break;
        }

        /* If we got a long line, discard characters until the newline.
         */
        if (i == (SIZ-1)) {
                while (buf[i] != '\n') {
                        serv_read(&buf[i], 1);
                }
        }

        /* Strip all trailing nonprintables (crlf)
         */
        buf[i] = 0;
}


/*
 * send line to server - implemented in terms of serv_write()
 */
void serv_puts(char *buf)
{
        serv_write(buf, strlen(buf));
        serv_write("\n", 1);
}


/*
 * Convenience functions to get/set system configuration entries
 */
void getconf_str(char *buf, char *key)
{
        char cmd[SIZ];
        char ret[SIZ];

        sprintf(cmd, "CONF GETVAL|%s", key);
        serv_puts(cmd);
        serv_gets(ret);
        if (ret[0] == '2') {
                extract_token(buf, &ret[4], 0, '|', SIZ);
        }
        else {
                strcpy(buf, "");
        }
}

int getconf_int(char *key)
{
        char buf[SIZ];
        getconf_str(buf, key);
        return atoi(buf);
}

void setconf_str(char *key, char *val)
{
        char buf[SIZ];

        sprintf(buf, "CONF PUTVAL|%s|%s", key, val);
        serv_puts(buf);
        serv_gets(buf);
}


void setconf_int(char *key, int val)
{
        char buf[SIZ];

        sprintf(buf, "CONF PUTVAL|%s|%d", key, val);
        serv_puts(buf);
        serv_gets(buf);
}





/*
 * On systems which use xinetd, see if we can offer to install Citadel as
 * the default telnet target.
 */
void check_xinetd_entry(void)
{
        char *filename = "/etc/xinetd.d/telnet";
        FILE *fp;
        char buf[SIZ];
        int already_citadel = 0;
        int rv;

        fp = fopen(filename, "r+");
        if (fp == NULL) return;         /* Not there.  Oh well... */

        while (fgets(buf, sizeof buf, fp) != NULL) {
                if (strstr(buf, "/citadel") != NULL) {
                        already_citadel = 1;
                }
        }
        fclose(fp);
        if (already_citadel) return;    /* Already set up this way. */

        /* Otherwise, prompt the user to create an entry. */
        if (getenv("CREATE_XINETD_ENTRY") != NULL) {
                if (strcasecmp(getenv("CREATE_XINETD_ENTRY"), "yes")) {
                        return;
                }
        }
        else {
                snprintf(buf, sizeof buf,
                         _("Setup can configure the \"xinetd\" service to automatically\n"
                           "connect incoming telnet sessions to Citadel, bypassing the\n"
                           "host system login: prompt.  Would you like to do this?\n"
                         )
                );
                if (yesno(buf, 1) == 0) {
                        return;
                }
        }

        fp = fopen(filename, "w");
        fprintf(fp,
                "# description: telnet service for Citadel users\n"
                "service telnet\n"
                "{\n"
                "       disable = no\n"
                "       flags           = REUSE\n"
                "       socket_type     = stream\n"
                "       wait            = no\n"
                "       user            = root\n"
                "       server          = /usr/sbin/in.telnetd\n"
                "       server_args     = -h -L %s/citadel\n"
                "       log_on_failure  += USERID\n"
                "}\n",
                ctdl_bin_dir
        );
        fclose(fp);

        /* Now try to restart the service.  This will not have the intended effect on Solaris, but who the hell uses Solaris anymore? */
        rv = system("systemctl restart xinetd >/dev/null 2>&1");
        if (rv != 0) {
                rv = system("service xinetd restart >/dev/null 2>&1");
        }
        if (rv != 0) {
                display_error(_("failed to restart xinetd.\n"));
        }
}


void disable_other_mtas(void)
{
        if ((getenv("ACT_AS_MTA") == NULL) || (getenv("ACT_AS_MTA") && strcasecmp(getenv("ACT_AS_MTA"), "yes") == 0)) {
                /* Offer to disable other MTA's on the system. */
                /* FIXME this has to be rewritten to work in the new systemd-based world. */
        }
}


void strprompt(const char *prompt_title, const char *prompt_text, char *Target, char *DefValue)
{
        char buf[SIZ] = "";
        char setupmsg[SIZ];
        char dialog_result[PATH_MAX];
        FILE *fp = NULL;
        int rv;

        strcpy(setupmsg, "");

        switch (setup_type) {
        case UI_TEXT:
                title(prompt_title);
                printf("\n%s\n", prompt_text);
                printf("%s\n%s\n", _("This is currently set to:"), Target);
                printf("%s\n", _("Enter new value or press return to leave unchanged:"));
                if (fgets(buf, sizeof buf, stdin)) {
                        buf[strlen(buf) - 1] = 0;
                }
                if (!IsEmptyStr(buf))
                        strcpy(Target, buf);
                break;

        case UI_DIALOG:
                CtdlMakeTempFileName(dialog_result, sizeof dialog_result);
                snprintf(buf, sizeof buf, "exec %s --backtitle '%s' --nocancel --inputbox '%s' 19 72 '%s' 2>%s",
                        getenv("CTDL_DIALOG"),
                        program_title,
                        prompt_text,
                        Target,
                        dialog_result);
                rv = system(buf);
                if (rv != 0) {
                        fprintf(stderr, "failed to run whiptail or dialog\n");
                }
                
                fp = fopen(dialog_result, "r");
                if (fp != NULL) {
                        if (fgets(Target, sizeof buf, fp)) {
                                if (Target[strlen(Target)-1] == 10) {
                                        Target[strlen(Target)-1] = 0;
                                }
                        }
                        fclose(fp);
                        unlink(dialog_result);
                }
                break;
        case UI_SILENT:
                if (*DefValue != '\0')
                        strcpy(Target, DefValue);
                break;
        }
}

void set_bool_val(int msgpos, int *ip, char *DefValue) 
{
        title(setup_titles[msgpos]);
        *ip = yesno(setup_text[msgpos], *ip);
}

void set_str_val(int msgpos, char *Target, char *DefValue) 
{
        strprompt(setup_titles[msgpos], 
                  setup_text[msgpos], 
                  Target, 
                  DefValue
        );
}

/* like set_str_val() but for numeric values */
void set_int_val(int msgpos, int *target, char *default_value)
{
        char buf[32];
        sprintf(buf, "%d", *target);
        do {
                set_str_val(msgpos, buf, default_value);
        } while ( (strcmp(buf, "0")) && (atoi(buf) == 0) );
        *target = atoi(buf);
}


void edit_value(int curr)
{
        struct passwd *pw = NULL;
        char ctdluidname[256];
        char buf[SIZ];
        char *default_value = NULL;
        int ctdluid = 0;
        int portnum = 0;
        int auth = 0;
        int lportnum = 0;

        if (setup_type == UI_SILENT)
        {
                default_value = getenv(EnvNames[curr]);
        }
        if (default_value == NULL) {
                default_value = "";
        }

        switch (curr) {

        case eSysAdminName:
                getconf_str(admin_name, "c_sysadm");
                set_str_val(curr, admin_name, default_value);
                setconf_str("c_sysadm", admin_name);
                break;

        case eSysAdminPW:
                set_str_val(curr, admin_pass, default_value);
                break;
        
        case eUID:
                ctdluid = getconf_int("c_ctdluid");
                if (setup_type == UI_SILENT)
                {               
                        if (default_value) {
                                ctdluid = atoi(default_value);
                        }                                       
                }
                else
                {
                        pw = getpwuid(ctdluid);
                        if (pw == NULL) {
                                set_int_val(curr, &ctdluid, default_value);
                        }
                        else {
                                strcpy(ctdluidname, pw->pw_name);
                                set_str_val(curr, ctdluidname, default_value);
                                pw = getpwnam(ctdluidname);
                                if (pw != NULL) {
                                        ctdluid = pw->pw_uid;
                                }
                                else if (atoi(ctdluidname) > 0) {
                                        ctdluid = atoi(ctdluidname);
                                }
                        }
#endif
                }
                setconf_int("c_ctdluid", ctdluid);
                break;

        case eIP_ADDR:
                getconf_str(buf, "c_ip_addr");
                set_str_val(curr, buf, default_value);
                setconf_str("c_ip_addr", buf);
                break;

        case eCTDL_Port:
                portnum = getconf_int("c_port_number");
                set_int_val(curr, &portnum, default_value);
                setconf_int("c_port_number", portnum);
                break;

        case eAuthType:
                auth = getconf_int("c_auth_mode");
                if (setup_type == UI_SILENT)
                {
                        if ( (default_value) && (!strcasecmp(default_value, "yes")) ) auth = AUTHMODE_HOST;
                        if ( (default_value) && (!strcasecmp(default_value, "host")) ) auth = AUTHMODE_HOST;
                        if ( (default_value) && (!strcasecmp(default_value, "ldap")) ) auth = AUTHMODE_LDAP;
                        if ( (default_value) && (!strcasecmp(default_value, "ldap_ad")) ) auth = AUTHMODE_LDAP_AD;
                        if ( (default_value) && (!strcasecmp(default_value, "active directory")) ) auth = AUTHMODE_LDAP_AD;
                }
                else {
                        set_int_val(curr, &auth, default_value);
                }
                setconf_int("c_auth_mode", auth);
                break;

        case eLDAP_Host:
                getconf_str(buf, "c_ldap_host");
                if (IsEmptyStr(buf)) {
                        strcpy(buf, "localhost");
                }
                set_str_val(curr, buf, default_value);
                setconf_str("c_ldap_host", buf);
                break;

        case eLDAP_Port:
                lportnum = getconf_int("c_ldap_port");
                if (lportnum == 0) {
                        lportnum = 389;
                }
                set_int_val(curr, &lportnum, default_value);
                setconf_int("c_ldap_port", lportnum);
                break;

        case eLDAP_Base_DN:
                getconf_str(buf, "c_ldap_base_dn");
                set_str_val(curr, buf, default_value);
                setconf_str("c_ldap_base_dn", buf);
                break;

        case eLDAP_Bind_DN:
                getconf_str(buf, "c_ldap_bind_dn");
                set_str_val(curr, buf, default_value);
                setconf_str("c_ldap_bind_dn", buf);
                break;

        case eLDAP_Bind_PW:
                getconf_str(buf, "c_ldap_bind_pw");
                set_str_val(curr, buf, default_value);
                setconf_str("c_ldap_bind_pw", buf);
                break;
        }
}



/*
 * Figure out what type of user interface we're going to use
 */
int discover_ui(void)
{

        /* Use "whiptail" or "dialog" if we have it */
        if (getenv("CTDL_DIALOG") != NULL) {
                return UI_DIALOG;
        }
                
        return UI_TEXT;
}



/*
 * Strip "db" entries out of /etc/nsswitch.conf
 */
void fixnss(void) {
        FILE *fp_read;
        int fd_write;
        char buf[256];
        char buf_nc[256];
        char question[512];
        int i;
        int file_changed = 0;
        char new_filename[64];
        int rv;

        fp_read = fopen(NSSCONF, "r");
        if (fp_read == NULL) {
                return;
        }

        strcpy(new_filename, "/tmp/ctdl_fixnss_XXXXXX");
        fd_write = mkstemp(new_filename);
        if (fd_write < 0) {
                fclose(fp_read);
                return;
        }

        while (fgets(buf, sizeof buf, fp_read) != NULL) {
                strcpy(buf_nc, buf);
                for (i=0; buf_nc[i]; ++i) {
                        if (buf_nc[i] == '#') {
                                buf_nc[i] = 0;
                                break;
                        }
                }
                for (i=0; i<strlen(buf_nc); ++i) {
                        if (!strncasecmp(&buf_nc[i], "db", 2)) {
                                if (i > 0) {
                                        if ((isspace(buf_nc[i+2])) || (buf_nc[i+2]==0)) {
                                                file_changed = 1;
                                                strcpy(&buf_nc[i], &buf_nc[i+2]);
                                                strcpy(&buf[i], &buf[i+2]);
                                                if (buf[i]==32) {
                                                        strcpy(&buf_nc[i], &buf_nc[i+1]);
                                                        strcpy(&buf[i], &buf[i+1]);
                                                }
                                        }
                                }
                        }
                }
                long buflen = strlen(buf);
                if (write(fd_write, buf, buflen) != buflen) {
                        fclose(fp_read);
                        close(fd_write);
                        unlink(new_filename);
                        return;
                }
        }

        fclose(fp_read);
        
        if (!file_changed) {
                unlink(new_filename);
                return;
        }

        snprintf(question, sizeof question,
                 _(
                         "\n"
                         "/etc/nsswitch.conf is configured to use the 'db' module for\n"
                         "one or more services.  This is not necessary on most systems,\n"
                         "and it is known to crash the Citadel server when delivering\n"
                         "mail to the Internet.\n"
                         "\n"
                         "Do you want this module to be automatically disabled?\n"
                         "\n"
                         )
        );

        if (yesno(question, 1)) {
                snprintf(buf, sizeof buf, "/bin/mv -f %s %s", new_filename, NSSCONF);
                rv = system(buf);
                if (rv != 0) {
                        fprintf(stderr, "failed to edit %s.\n", NSSCONF);
                }
                chmod(NSSCONF, 0644);
        }
        unlink(new_filename);
}


/*
 * Messages that are no longer in use.
 * We keep them here so we don't lose the translations if we need them later.
 */
void niu_messages() {
important_message(_("Setup finished"),
_("Setup of the Citadel server is complete.\n"
"If you will be using WebCit, please run its\n"
"setup program now; otherwise, run './citadel'\n"
"to log in.\n"));
important_message(_("Setup failed"),
_("Setup is finished, but the Citadel server failed to start.\n"
"Go back and check your configuration.\n");
important_message(_("Setup finished"),
_("Setup is finished.  You may now start the server."));
}


int main(int argc, char *argv[])
{
        int a, i;
        int curr;
        char buf[1024]; 
        char aaa[128];
        int relh = 0;
        int home = 0;
        char relhome[PATH_MAX]="";
        char ctdldir[PATH_MAX]=CTDLDIR;
        struct passwd *pw;
        gid_t gid;
        char *activity = NULL;
        
        /* Keep a mild groove on */
        program_title = _("Citadel setup program");

        /* set an invalid setup type */
        setup_type = (-1);

        /* parse command line args */
        for (a = 0; a < argc; ++a) {
                if (!strncmp(argv[a], "-u", 2)) {
                        strcpy(aaa, argv[a]);
                        strcpy(aaa, &aaa[2]);
                        setup_type = atoi(aaa);
                }
                else if (!strcmp(argv[a], "-q")) {
                        setup_type = UI_SILENT;
                }
                else if (!strncmp(argv[a], "-h", 2)) {
                        relh=argv[a][2]!='/';
                        if (!relh) {
                                safestrncpy(ctdl_home_directory, &argv[a][2], sizeof ctdl_home_directory);
                        } else {
                                safestrncpy(relhome, &argv[a][2], sizeof relhome);
                        }
                        home = 1;
                }

        }

        calc_dirs_n_files(relh, home, relhome, ctdldir, 0);
        SetTitles();

        /* If a setup type was not specified, try to determine automatically
         * the best one to use out of all available types.
         */
        if (setup_type < 0) {
                setup_type = discover_ui();
        }

        enable_home = ( relh | home );

        if (chdir(ctdl_run_dir) != 0) {
                display_error("%s: [%s]\n", _("The directory you specified does not exist"), ctdl_run_dir);
                exit(errno);
        }


        /*
         * Connect to the running Citadel server.
         */
        char *connectingmsg = _("Connecting to Citadel server");
        for (i=0; ((i<30) && (serv_sock < 0)) ; ++i) {          /* wait for server to start up */
                progress(connectingmsg, i, 30);
                serv_sock = uds_connectsock(file_citadel_admin_socket);
                sleep(1);
        }
        progress(connectingmsg, 30, 30);

        if (serv_sock < 0) { 
                display_error(
                        "%s: %s %s\n", 
                        _("Setup could not connect to a running Citadel server."),
                        strerror(errno), file_citadel_admin_socket
                );
                exit(1);
        }

        /*
         * read the server greeting
         */
        serv_gets(buf);
        if (buf[0] != '2') {
                display_error("%s\n", buf);
                exit(2);
        }

        /*
         * Are we connected to the correct Citadel server?
         */
        serv_puts("INFO");
        serv_gets(buf);
        if (buf[0] != '1') {
                display_error("%s\n", buf);
                exit(3);
        }
        a = 0;
        while (serv_gets(buf), strcmp(buf, "000")) {
                if (a == 5) {
                        if (atoi(buf) != REV_LEVEL) {
                                display_error("%s\n",
                                _("Your setup program and Citadel server are from different versions.")
                                );
                                exit(4);
                        }
                }
                ++a;
        }

        /*
         * Now begin.
         */


        if (setup_type == UI_TEXT) {
                printf("\n\n\n         *** %s ***\n\n", program_title);
        }

        if (setup_type == UI_DIALOG) {
                system("clear 2>/dev/null");
        }

        /* Go through a series of dialogs prompting for config info */
        for (curr = 1; curr < eMaxQuestions; ++curr) {
                edit_value(curr);

                if (    (curr == eAuthType)
                        && (getconf_int("c_auth_mode") != AUTHMODE_LDAP)
                        && (getconf_int("c_auth_mode") != AUTHMODE_LDAP_AD)
                ) {
                        curr += 5;      /* skip LDAP questions if we're not authenticating against LDAP */
                }

                if (curr == eSysAdminName) {
                        if (getconf_int("c_auth_mode") == AUTHMODE_NATIVE) {
                                                /* for native auth mode, fetch the admin's existing pw */
                                snprintf(buf, sizeof buf, "AGUP %s", admin_name);
                                serv_puts(buf);
                                serv_gets(buf);
                                if (buf[0] == '2') {
                                        extract_token(admin_pass, &buf[4], 1, '|', sizeof admin_pass);
                                }
                        }
                        else {
                                ++curr;         /* skip the password question for non-native auth modes */
                        }
                }
        }

        if ((pw = getpwuid( getconf_int("c_ctdluid") )) == NULL) {
                gid = getgid();
        } else {
                gid = pw->pw_gid;
        }

        if (create_run_directories(getconf_int("c_ctdluid"), gid) != 0) {
                display_error("%s\n", _("failed to create directories"));
        }
                
        activity = _("Reconfiguring Citadel server");
        progress(activity, 0, 5);
        sleep(1);                                       /* Let the message appear briefly */

        /*
         * Create the administrator account.  It's ok if the command fails if this user already exists.
         */
        if (getconf_int("c_auth_mode") == AUTHMODE_NATIVE) {
                progress(activity, 1, 5);
                snprintf(buf, sizeof buf, "CREU %s|%s", admin_name, admin_pass);
                serv_puts(buf);
                progress(activity, 2, 5);
                serv_gets(buf);
        }
        progress(activity, 3, 5);

        /*
         * Assign the desired password and access level to the administrator account.
         */
        if (getconf_int("c_auth_mode") == AUTHMODE_NATIVE) {
                snprintf(buf, sizeof buf, "AGUP %s", admin_name);
                serv_puts(buf);
                progress(activity, 4, 5);
                serv_gets(buf);
                if (buf[0] == '2') {
                        int admin_flags = extract_int(&buf[4], 2);
                        int admin_times_called = extract_int(&buf[4], 3);
                        int admin_msgs_posted = extract_int(&buf[4], 4);
                        snprintf(buf, sizeof buf, "ASUP %s|%s|%d|%d|%d|6",
                                admin_name, admin_pass, admin_flags, admin_times_called, admin_msgs_posted
                        );
                        serv_puts(buf);
                        serv_gets(buf);
                }
        }
        progress(activity, 5, 5);

#ifndef __CYGWIN__
        check_xinetd_entry();   /* Check /etc/xinetd.d/telnet */
        disable_other_mtas();   /* Offer to disable other MTAs */
        fixnss();               /* Check for the 'db' nss and offer to disable it */
#endif

        /*
         * Restart citserver
         */
        activity = _("Restarting Citadel server to apply changes");
        progress(activity, 0, 51);

        serv_puts("TIME");
        serv_gets(buf);
        long original_start_time = extract_long(&buf[4], 3);

        progress(activity, 1, 51);
        serv_puts("DOWN 1");
        progress(activity, 2, 51);
        serv_gets(buf);
        if (buf[0] != '2') {
                display_error("%s\n", buf);
                exit(6);
        }

        close(serv_sock);
        serv_sock = (-1);

        for (i=3; i<=6; ++i) {                                  /* wait for server to shut down */
                progress(activity, i, 51);
                sleep(1);
        }

        for (i=7; ((i<=48) && (serv_sock < 0)) ; ++i) {         /* wait for server to start up */
                progress(activity, i, 51);
                serv_sock = uds_connectsock(file_citadel_admin_socket);
                sleep(1);
        }

        progress(activity, 49, 51);
        serv_gets(buf);

        progress(activity, 50, 51);
        serv_puts("TIME");
        serv_gets(buf);
        long new_start_time = extract_long(&buf[4], 3);

        close(serv_sock);
        progress(activity, 51, 51);

        if (    (original_start_time == new_start_time)
                || (new_start_time <= 0)
        ) {
                display_error("%s\n", _("Setup failed to restart Citadel server.  Please restart it manually."));
                exit(7);
        }

        exit(0);
        return 0;
}