/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 */

#define CORE_PRIVATE
#include "ap_config.h"
#include "httpd.h" 
#include "http_main.h" 
#include "http_log.h" 
#include "http_config.h"
#include "util_uri.h" 
#include "util_ebcdic.h"
#include "apr_getopt.h"
#include "ap_mpm.h"

/* WARNING: Win32 binds http_main.c dynamically to the server. Please place 
 *          extern functions and global data in another appropriate module.
 *
 * Most significant main() global data can be found in http_config.c
 */

/* XXX - We should be able to grab the per-MPM settings here too */
static void show_compile_settings(void)
{
    printf("Server version: %s\n", ap_get_server_version());
    printf("Server built:   %s\n", ap_get_server_built());
    printf("Server's Module Magic Number: %u:%u\n",
	   MODULE_MAGIC_NUMBER_MAJOR, MODULE_MAGIC_NUMBER_MINOR);
    printf("Server compiled with....\n");
#ifdef BIG_SECURITY_HOLE
    printf(" -D BIG_SECURITY_HOLE\n");
#endif
#ifdef SECURITY_HOLE_PASS_AUTHORIZATION
    printf(" -D SECURITY_HOLE_PASS_AUTHORIZATION\n");
#endif
#ifdef HAVE_MMAP
    printf(" -D HAVE_MMAP\n");
#endif
#ifdef HAVE_SHMGET
    printf(" -D HAVE_SHMGET\n");
#endif
#ifdef USE_MMAP_SCOREBOARD
    printf(" -D USE_MMAP_SCOREBOARD\n");
#endif
#ifdef USE_SHMGET_SCOREBOARD
    printf(" -D USE_SHMGET_SCOREBOARD\n");
#endif
#ifdef USE_OS2_SCOREBOARD
    printf(" -D USE_OS2_SCOREBOARD\n");
#endif
#ifdef USE_POSIX_SCOREBOARD
    printf(" -D USE_POSIX_SCOREBOARD\n");
#endif
#ifdef USE_MMAP_FILES
    printf(" -D USE_MMAP_FILES\n");
#ifdef MMAP_SEGMENT_SIZE
	printf(" -D MMAP_SEGMENT_SIZE=%ld\n",(long)MMAP_SEGMENT_SIZE);
#endif
#endif /*USE_MMAP_FILES*/
#ifdef NO_WRITEV
    printf(" -D NO_WRITEV\n");
#endif
#ifdef NO_LINGCLOSE
    printf(" -D NO_LINGCLOSE\n");
#endif
#ifdef USE_FCNTL_SERIALIZED_ACCEPT
    printf(" -D USE_FCNTL_SERIALIZED_ACCEPT\n");
#endif
#ifdef USE_FLOCK_SERIALIZED_ACCEPT
    printf(" -D USE_FLOCK_SERIALIZED_ACCEPT\n");
#endif
#ifdef USE_USLOCK_SERIALIZED_ACCEPT
    printf(" -D USE_USLOCK_SERIALIZED_ACCEPT\n");
#endif
#ifdef USE_SYSVSEM_SERIALIZED_ACCEPT
    printf(" -D USE_SYSVSEM_SERIALIZED_ACCEPT\n");
#endif
#ifdef USE_PTHREAD_SERIALIZED_ACCEPT
    printf(" -D USE_PTHREAD_SERIALIZED_ACCEPT\n");
#endif
#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
    printf(" -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT\n");
#endif
#ifdef APR_HAS_OTHER_CHILD
    printf(" -D APR_HAS_OTHER_CHILD\n");
#endif
#ifdef HAVE_RELIABLE_PIPED_LOGS
    printf(" -D HAVE_RELIABLE_PIPED_LOGS\n");
#endif
#ifdef BUFFERED_LOGS
    printf(" -D BUFFERED_LOGS\n");
#ifdef PIPE_BUF
	printf(" -D PIPE_BUF=%ld\n",(long)PIPE_BUF);
#endif
#endif
#ifdef CHARSET_EBCDIC
    printf(" -D CHARSET_EBCDIC\n");
#endif
#ifdef APACHE_XLATE
    printf(" -D APACHE_XLATE\n");
#endif
#ifdef NEED_HASHBANG_EMUL
    printf(" -D NEED_HASHBANG_EMUL\n");
#endif
#ifdef SHARED_CORE
    printf(" -D SHARED_CORE\n");
#endif

/* This list displays the compiled in default paths: */
#ifdef HTTPD_ROOT
    printf(" -D HTTPD_ROOT=\"" HTTPD_ROOT "\"\n");
#endif
#ifdef SUEXEC_BIN
    printf(" -D SUEXEC_BIN=\"" SUEXEC_BIN "\"\n");
#endif
#if defined(SHARED_CORE) && defined(SHARED_CORE_DIR)
    printf(" -D SHARED_CORE_DIR=\"" SHARED_CORE_DIR "\"\n");
#endif
#ifdef DEFAULT_PIDLOG
    printf(" -D DEFAULT_PIDLOG=\"" DEFAULT_PIDLOG "\"\n");
#endif
#ifdef DEFAULT_SCOREBOARD
    printf(" -D DEFAULT_SCOREBOARD=\"" DEFAULT_SCOREBOARD "\"\n");
#endif
#ifdef DEFAULT_LOCKFILE
    printf(" -D DEFAULT_LOCKFILE=\"" DEFAULT_LOCKFILE "\"\n");
#endif
#ifdef DEFAULT_XFERLOG
    printf(" -D DEFAULT_XFERLOG=\"" DEFAULT_XFERLOG "\"\n");
#endif
#ifdef DEFAULT_ERRORLOG
    printf(" -D DEFAULT_ERRORLOG=\"" DEFAULT_ERRORLOG "\"\n");
#endif
#ifdef TYPES_CONFIG_FILE
    printf(" -D TYPES_CONFIG_FILE=\"" TYPES_CONFIG_FILE "\"\n");
#endif
#ifdef SERVER_CONFIG_FILE
    printf(" -D SERVER_CONFIG_FILE=\"" SERVER_CONFIG_FILE "\"\n");
#endif
}

static void destroy_and_exit_process(process_rec *process, int process_exit_value)
{
    ap_destroy_pool(process->pool); /* and destroy all descendent pools */
    ap_terminate();
    exit(process_exit_value);
}

static process_rec *create_process(int argc, char *const *argv)
{
    process_rec *process;
    
    {
	ap_pool_t *cntx;
        ap_status_t stat;

	stat = ap_create_pool(&cntx, NULL);
        if (stat != APR_SUCCESS) {
            ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, NULL,
                         "ap_create_pool() failed to create "
                         "initial context");
            ap_terminate();
            exit(1);
        }

	process = ap_palloc(cntx, sizeof(process_rec));
	process->pool = cntx;
    }
    ap_create_pool(&process->pconf, process->pool);
    process->argc = argc;
    process->argv = argv;
    process->short_name = ap_filename_of_pathname(argv[0]);
    return process;
}

static void usage(process_rec *process)
{
    const char *bin = process->argv[0];
    char pad[MAX_STRING_LEN];
    unsigned i;

    for (i = 0; i < strlen(bin); i++)
	pad[i] = ' ';
    pad[i] = '\0';
#ifdef SHARED_CORE
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0,NULL , "Usage: %s [-R directory] [-D name] [-d directory] [-f file]", bin);
#else
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "Usage: %s [-D name] [-d directory] [-f file]", bin);
#endif
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "       %s [-C \"directive\"] [-c \"directive\"]", pad);
#ifdef WIN32
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "       %s [-k restart|shutdown|start]", pad);
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "       %s [-n service_name]", pad);
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "       %s [-i] [-u]", pad);
#endif
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "       %s [-v] [-V] [-h] [-l] [-L] [-S] [-t] [-T]", pad);
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "Options:");
#ifdef SHARED_CORE
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -R directory     : specify an alternate location for shared object files");
#endif
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -D name          : define a name for use in <IfDefine name> directives");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -d directory     : specify an alternate initial ServerRoot");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -f file          : specify an alternate ServerConfigFile");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -C \"directive\"   : process directive before reading config files");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -c \"directive\"   : process directive after  reading config files");
#ifdef WIN32
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -n name          : set service name and use its ServerConfigFile");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -k shutdown      : tell running Apache to shutdown");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -k restart       : tell running Apache to do a graceful restart");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -k start         : tell Apache to start");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -i               : install an Apache service");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -u               : uninstall an Apache service");
#endif
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -v               : show version number");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -V               : show compile settings");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -h               : list available command line options (this page)");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -l               : list compiled in modules");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -L               : list available configuration directives");
    /* TODOC: -S has been replaced by '-t -D DUMP_VHOSTS' */
    /* ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -S               : show parsed settings (currently only vhost settings)"); */
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -t               : run syntax check for config files (with docroot check)");
    ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "  -T               : run syntax check for config files (without docroot check)");
    /* TODOC: -X goes away, expect MPMs to use -D options */
    destroy_and_exit_process(process, 1);
}

#ifdef WIN32
int apache_main(int argc, char *argv[])
#else
API_EXPORT(int)        main(int argc, char *argv[])
#endif
{
    int c;
    int configtestonly = 0;
    const char *confname = SERVER_CONFIG_FILE;
    const char *def_server_root = HTTPD_ROOT;
    process_rec *process;
    server_rec *server_conf;
    ap_pool_t *pglobal;
    ap_pool_t *pconf;
    ap_pool_t *plog; /* Pool of log streams, reset _after_ each read of conf */
    ap_pool_t *ptemp; /* Pool for temporary config stuff, reset often */
    ap_pool_t *pcommands; /* Pool for -D, -C and -c switches */
    module **mod;
    ap_directive_t *conftree = NULL;

#ifndef WIN32 /* done in main_win32.c */
    ap_initialize();
#endif
    process = create_process(argc, (char *const *)argv);
    pglobal = process->pool;
    pconf = process->pconf;
    ap_server_argv0 = process->short_name;

#ifdef CHARSET_EBCDIC
    if (ap_init_ebcdic(pglobal) != APR_SUCCESS) {
        destroy_and_exit_process(process, 1);
    }
#endif

    ap_util_uri_init();

    ap_setup_prelinked_modules(process);

    ap_create_pool(&pcommands, pglobal);
    ap_server_pre_read_config  = ap_make_array(pcommands, 1, sizeof(char *));
    ap_server_post_read_config = ap_make_array(pcommands, 1, sizeof(char *));
    ap_server_config_defines   = ap_make_array(pcommands, 1, sizeof(char *));

    ap_run_rewrite_args(process);

    /* Maintain AP_SERVER_BASEARGS list in http_main.h to allow the MPM 
     * to safely pass on our args from its rewrite_args() handler.
     */
    while (ap_getopt(process->argc, process->argv, 
                     AP_SERVER_BASEARGS, &c, pcommands) 
            == APR_SUCCESS) {
        char **new;
        switch (c) {
 	case 'c':
	    new = (char **)ap_push_array(ap_server_post_read_config);
	    *new = ap_pstrdup(pcommands, ap_optarg);
	    break;
	case 'C':
	    new = (char **)ap_push_array(ap_server_pre_read_config);
	    *new = ap_pstrdup(pcommands, ap_optarg);
	    break;
	case 'd':
	    def_server_root = ap_optarg;
	    break;
	case 'D':
	    new = (char **)ap_push_array(ap_server_config_defines);
	    *new = ap_pstrdup(pcommands, ap_optarg);
	    break;
	case 'f':
	    confname = ap_optarg;
	    break;
	case 'v':
	    printf("Server version: %s\n", ap_get_server_version());
	    printf("Server built:   %s\n", ap_get_server_built());
	    destroy_and_exit_process(process, 0);
	case 'V':
	    show_compile_settings();
	    destroy_and_exit_process(process, 0);
	case 'l':
	    ap_show_modules();
	    destroy_and_exit_process(process, 0);
	case 'L':
	    ap_show_directives();
	    destroy_and_exit_process(process, 0);
	case 't':
	    configtestonly = 1;
	    break;
	case '?':
	case 'h':
	    usage(process);
	}
    }

    ap_create_pool(&plog, pglobal);
    ap_create_pool(&ptemp, pconf);

    /* Note that we preflight the config file once
       before reading it _again_ in the main loop.
       This allows things, log files configuration 
       for example, to settle down. */

    ap_server_root = def_server_root;
    server_conf = ap_read_config(process, ptemp, confname, &conftree);
    ap_run_pre_config(pconf, plog, ptemp);
    ap_process_config_tree(server_conf, conftree, process->pconf, ptemp); 
    if (configtestonly) {
	ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "Syntax OK\n");
	destroy_and_exit_process(process, 0);
    }
    ap_clear_pool(plog);
    ap_run_open_logs(pconf, plog, ptemp, server_conf);
    ap_post_config_hook(pconf, plog, ptemp, server_conf);
    ap_destroy_pool(ptemp);

    for (;;) {
	ap_hook_deregister_all();
	ap_clear_pool(pconf);
	for (mod = ap_prelinked_modules; *mod != NULL; mod++) {
		ap_register_hooks(*mod);
	}
        /* This is a hack until we finish the code so that it only reads
         * the config file once and just operates on the tree already in
         * memory.  rbb
         */
        conftree = NULL;
	ap_create_pool(&ptemp, pconf);
	ap_server_root = def_server_root;
        server_conf = ap_read_config(process, ptemp, confname, &conftree);
	ap_run_pre_config(pconf, plog, ptemp);
        ap_process_config_tree(server_conf, conftree, process->pconf, ptemp); 
	ap_clear_pool(plog);
	ap_run_open_logs(pconf, plog, ptemp, server_conf);
	ap_post_config_hook(pconf, plog, ptemp, server_conf);
	ap_destroy_pool(ptemp);

	if (ap_mpm_run(pconf, plog, server_conf)) break;
    }
    destroy_and_exit_process(process, 0);
    return 0; /* Supress compiler warning. */
}

/* force Expat to be linked into the server executable */
#if defined(USE_EXPAT) && !defined(SHARED_CORE_BOOTSTRAP)
#include "xmlparse.h"
const XML_LChar *suck_in_expat(void);
const XML_LChar *suck_in_expat(void)
{
    return XML_ErrorString(XML_ERROR_NONE);
}
#endif /* USE_EXPAT */

#ifndef SHARED_CORE_BOOTSTRAP
/*
 * Force ap_validate_password() into the image so that modules like
 * mod_auth can use it even if they're dynamically loaded.
 */
void suck_in_ap_validate_password(void);
void suck_in_ap_validate_password(void)
{
    ap_validate_password("a", "b");
}
#endif