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path: root/modules/mailutils/mod_mailutils.c
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/* wydawca - automatic release submission daemon
   Copyright (C) 2007-2013, 2017 Sergey Poznyakoff

   Wydawca is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 3 of the License, or (at your
   option) any later version.

   Wydawca 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.

   You should have received a copy of the GNU General Public License along
   with wydawca. If not, see <http://www.gnu.org/licenses/>. */

#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <gpgme.h>
#include "grecs.h"
#include <wydawca/wydawca.h>
#include <wydawca/cfg.h>
#include <mailutils/mailutils.h>

#define WY_MODULE mod_mailutils

static int mailer_opened;
static mu_mailer_t mailer;
static mu_address_t admin_address;
static mu_address_t from_address;
unsigned long mail_admin_mask;
unsigned long owner_notification_flags;

static char *admin_stat_message;
static char *admin_stat_sign_key;

struct message_template {
	char *name;
	char *text;
	/*  int mime; for future use */
};

static struct grecs_symtab *tmpl_table;

/* Register a template. */
void
register_message_template(const char *name, const char *text)
{
	struct message_template key, *tmpl;
	int install = 1;

	key.name = (char *)text;

	if (!tmpl_table) {
		tmpl_table = grecs_symtab_create_default(sizeof(key));
		if (!tmpl_table)
			grecs_alloc_die();
	}

	tmpl = grecs_symtab_lookup_or_install(tmpl_table, &key, &install);
	if (!tmpl)
		grecs_alloc_die();
	if (!install)
		grecs_warning(NULL, 0, "template %s already registered", text);
}

const char *
resolve_message_template(const char *name)
{
	if (name[0] == '@') {
		if (name[1] == '@')
			return name + 1;
		else if (!tmpl_table)
			return NULL;
		else {
			struct message_template *p, key;

			key.name = (char *)name + 1;
			p = grecs_symtab_lookup_or_install(tmpl_table, &key,
							   NULL);
			return p ? p->text : NULL;
		}
	}
	return name;
}

static int
cb_define_message(enum grecs_callback_command cmd, grecs_node_t *node,
		  void *varptr, void *cb_data)
{
	const char *ident;
	grecs_locus_t *locus = &node->locus;
	grecs_value_t *value = node->v.value;

	if (cmd != grecs_callback_set_value) {
		grecs_error(locus, 0, _("Unexpected block statement"));
		return 1;
	}
	if (!value || value->type != GRECS_TYPE_ARRAY || value->v.arg.c != 2) {
		grecs_error(locus, 0, _("expected two arguments"));
		return 1;
	}

	if (value->v.arg.v[0]->type != GRECS_TYPE_STRING) {
		grecs_error(&value->v.arg.v[0]->locus, 0,
			    _("first argument not a string"));
		return 1;
	}
	ident = value->v.arg.v[0]->v.string;

	if (value->v.arg.v[1]->type != GRECS_TYPE_STRING) {
		grecs_error(&value->v.arg.v[1]->locus, 0,
			    _("second argument not a string"));
		return 1;
	}

	register_message_template(ident, value->v.arg.v[1]->v.string);
	return 0;
}

static ssize_t
mu_stream_data_read_cb(void *handle, void *buffer, size_t size)
{
	mu_stream_t str = handle;
	size_t nread;
	int rc;

	rc = mu_stream_read(str, buffer, size, &nread);
	if (rc) {
		wy_log(LOG_ERR, "mu_stream_read: %s", mu_strerror(rc));
		errno = EIO;
		return -1;
	}
	return nread;
}

static int
check_sign_result(gpgme_sign_result_t result, gpgme_sig_mode_t type)
{
	gpgme_new_signature_t sign;

	if (result->invalid_signers) {
		wy_log(LOG_ERR, _("GPGME: invalid signer found: %s"),
		       result->invalid_signers->fpr);
		return 1;
	}

	if (!result->signatures) {
		wy_log(LOG_ERR, _("GPGME: no signatures created"));
		return 1;
	}

	for (sign = result->signatures; sign; sign = sign->next) {
		if (sign->type != type) {
			wy_log(LOG_ERR,
			       _("GPGME: wrong type of signature created"));
			return 1;
		}
	}
	/* FIXME: fingerprint? */
	return 0;
}

static int
gpg_sign(gpgme_data_t * output, gpgme_data_t input, const char *sign_keys)
{
	gpgme_ctx_t ctx;
	gpgme_error_t err = 0;
	gpgme_key_t key;
	int ret;

	err = gpgme_new(&ctx);
	if (err) {
		wy_log(LOG_ERR, _("GPGME: cannot create context: %s"),
		       gpgme_strerror(err));
		return 1;
	}

	err = gpgme_op_keylist_start(ctx, sign_keys, 0);
	if (!err) {
		while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
			err = gpgme_signers_add(ctx, key);
			gpgme_key_release(key);
		}
	}

	if (err && gpg_err_code(err) != GPG_ERR_EOF) {
		wy_log(LOG_ERR, _("GPGME: cannot list keys: %s"),
		       gpgme_strerror(err));
		gpgme_release(ctx);
		return 1;
	}

	err = gpgme_data_new(output);
	if (err) {
		wy_log(LOG_ERR, _("%s: GPGME error: %s"),
		       "gpgme_data_new", gpgme_strerror(err));
		gpgme_release(ctx);
		return 1;
	}

	/* FIXME: Passphrase */
	gpgme_set_textmode(ctx, 1);
	gpgme_set_armor(ctx, 1);

	err = gpgme_op_sign(ctx, input, *output, GPGME_SIG_MODE_CLEAR);
	if (err) {
		wy_log(LOG_ERR, _("%s: GPGME error: %s"),
		       "gpgme_op_sign", gpgme_strerror(err));
		ret = 1;
	} else {
		ret = check_sign_result(gpgme_op_sign_result(ctx),
					GPGME_SIG_MODE_CLEAR);
#if 0
		/* FIXME: */
		if (wy_debug_level > 1)
			gpgme_debug_info(ctx);
#endif
	}

	gpgme_release(ctx);
	return ret;
}

static int
sign_message(mu_message_t *pmsg, const char *key)
{
	mu_message_t msg = *pmsg;
	mu_message_t newmsg;
	mu_body_t body;
	mu_header_t hdr;
	mu_stream_t istr, ostr, bodystr;
	int rc;
	struct gpgme_data_cbs cbs;
	gpgme_data_t input, output;
	gpgme_error_t err;
	char *buf = NULL;
	size_t size = 0;
	size_t nread;

	wy_debug(1, (_("signing message as %s"), key));

	if (wy_gpg_homedir) {
		wy_debug(2, (_("setting GNUPG home directory: %s"),
			     wy_gpg_homedir));
		setenv("GNUPGHOME", wy_gpg_homedir, 1);
	}

	if ((rc = mu_message_get_body(msg, &body))) {
		wy_log(LOG_ERR, "mu_message_get_body: %s", mu_strerror(rc));
		return 1;
	}

	if ((rc = mu_body_get_streamref(body, &bodystr))) {
		wy_log(LOG_ERR, "mu_message_get_stream: %s", mu_strerror(rc));
		return 1;
	}

	memset(&cbs, 0, sizeof(cbs));
	cbs.read = mu_stream_data_read_cb;

	err = gpgme_data_new_from_cbs(&input, &cbs, &bodystr);
	if (err) {
		wy_log(LOG_ERR, "gpgme_data_new_from_cbs: %s",
		       gpgme_strerror(rc));
		return 1;
	}

	rc = gpg_sign(&output, input, key);
	mu_stream_unref(bodystr);
	if (rc)
		return 1;

	if (gpgme_data_seek(output, 0, SEEK_SET) == -1) {
		wy_log(LOG_ERR, "gpgme_data_seek: %s", strerror(errno));
		return 1;
	}

	mu_message_create(&newmsg, NULL);
	mu_message_get_streamref(newmsg, &ostr);

	/* Copy headers */
	mu_message_get_header(msg, &hdr);
	mu_header_get_streamref(hdr, &istr);

	rc = mu_stream_copy(ostr, istr, 0, NULL);
	if (rc)
		wy_log(LOG_ERR, "mu_stream_copy: %s", mu_strerror(rc));
	else {
		while ((nread = gpgme_data_read(output, buf, size)) > 0) {
			rc = mu_stream_write(ostr, buf, nread, NULL);
			if (rc) {
				wy_log(LOG_ERR, "mu_stream_write: %s",
				       mu_strerror(rc));
				break;
			}
		}

		if (rc == 0) {
			mu_message_destroy(&msg, mu_message_get_owner(msg));
			*pmsg = newmsg;
		}
	}
	mu_stream_unref(istr);
	mu_stream_unref(ostr);

	if (rc)
		mu_message_destroy(&newmsg, mu_message_get_owner(msg));
	gpgme_data_release(output);
	free(buf);

	return rc;
}

static void
mail_send_message(mu_address_t rcpt, const char *text, const char *signer_key)
{
	int rc;
	mu_message_t msg;
	mu_stream_t stream = NULL;
	mu_header_t hdr;
	const char *sval;

	mu_static_memory_stream_create(&stream, text, strlen(text));
	rc = mu_stream_to_message(stream, &msg);
	mu_stream_unref(stream);
	if (rc) {
		wy_log(LOG_CRIT, _("cannot create message: %s"),
		       mu_strerror(rc));
		return;
	}
	mu_message_get_header(msg, &hdr);
	mu_header_append(hdr, "X-Mailer", wy_version);

	if (rcpt) {
		const char *s;

		if (mu_address_sget_printable(rcpt, &s) == 0)
			mu_header_set_value(hdr, "To", s, 1);

		if (from_address && mu_header_sget_value(hdr, "From", &sval)) {
			if (mu_address_sget_printable(from_address, &s) == 0)
				mu_header_set_value(hdr, "From", s, 1);
		}
	}

	if (wy_debug_level > 1) {
		mu_debug_level_t level;

		mu_debug_get_category_level(MU_DEBCAT_MAILER, &level);
		level |= MU_DEBUG_LEVEL_MASK(MU_DEBUG_TRACE0) |
		    MU_DEBUG_LEVEL_MASK(MU_DEBUG_PROT);
		if (wy_debug_level > 2)
			level |= MU_DEBUG_LEVEL_MASK(MU_DEBUG_TRACE7);
		mu_debug_set_category_level(MU_DEBCAT_MAILER, level);
	}

	if (!mailer_opened) {
		if ((rc = mu_mailer_open(mailer, 0))) {
			mu_url_t url = NULL;
			mu_mailer_get_url(mailer, &url);
			wy_log(LOG_CRIT, _("opening mailer `%s' failed: %s"),
			       url ? mu_url_to_string(url) : "(unknown URL)",
			       mu_strerror(rc));
			return;
		}
		mailer_opened = 1;
	}

	if (signer_key)
		sign_message(&msg, signer_key);

	if (!wy_dry_run) {
		rc = mu_mailer_send_message(mailer, msg, from_address, rcpt);
		if (rc)
			wy_log(LOG_CRIT, _("cannot send message: %s"),
			       mu_strerror(rc));
	}

	mu_message_destroy(&msg, mu_message_get_owner(msg));
}

static int
cb_mailer(enum grecs_callback_command cmd, grecs_node_t *node,
	  void *varptr, void *cb_data)
{
	int rc;
	grecs_locus_t *locus = &node->locus;
	grecs_value_t *value = node->v.value;
	
	if (wy_assert_string_arg(locus, cmd, value))
		return 1;
	rc = mu_mailer_create(&mailer, value->v.string);
	if (rc)
		grecs_error(&value->locus, 0,
			    _("cannot create mailer `%s': %s"),
			    value->v.string,
			    mu_strerror(rc));
	return rc;
}

static int
cb_email_address(enum grecs_callback_command cmd, grecs_node_t *node,
		 void *varptr, void *cb_data)
{
	int rc = 1;
	mu_address_t addr = NULL;
	grecs_locus_t *locus = &node->locus;
	grecs_value_t *value = node->v.value;
	struct grecs_list_entry *ep;

	switch (value->type) {
	case GRECS_TYPE_STRING:
		rc = mu_address_create(&addr, value->v.string);
		if (rc) {
			grecs_error(&value->locus, 0,
				    _("%s: invalid email address: %s"),
				    value->v.string, mu_strerror(rc));
			return rc;
		}
		break;

	case GRECS_TYPE_LIST:
		for (ep = value->v.list->head; ep; ep = ep->next) {
			const grecs_value_t *vp = ep->data;
			mu_address_t a;
			if (wy_assert_string_arg(locus, cmd, vp))
				return 1;

			rc = mu_address_create(&a, vp->v.string);
			if (rc == 0)
				rc = mu_address_union(&addr, a);
			else {
				grecs_error(&value->locus, 0,
					    _("%s: invalid email address: %s"),
					    vp->v.string,
					    mu_strerror(rc));
			}
			mu_address_destroy(&a);
			if (rc)
				break;
		}
		break;

	case GRECS_TYPE_ARRAY:
		grecs_error(locus, 0, _("too many arguments"));
		return 1;
	}
	
	*(mu_address_t *) varptr = addr;
	return rc;
}

static struct grecs_keyword mail_statistics_kw[] = {
	{ "message", N_("text"),
	  N_("Message text"),
	  grecs_type_string, GRECS_DFLT, &admin_stat_message },
	{ "statistics", N_("items"),
	  N_("Send mail if one or more of these items are set"),
	  grecs_type_string, GRECS_DFLT, &mail_admin_mask, 0,
	  wy_cb_statistics },
	{ "gpg-sign",
	  N_("key"), N_("Sign message with this key"),
	  grecs_type_string, GRECS_DFLT, &admin_stat_sign_key },
	{ NULL }
};

static struct grecs_keyword mail_kw[] = {
	{ "mailer", N_("url"), N_("Set mailer URL"),
	  grecs_type_string, GRECS_DFLT, &mailer, 0, cb_mailer },
	{ "admin-address", N_("email"), N_("Set admin email address"),
	  grecs_type_string, GRECS_DFLT, &admin_address, 0, cb_email_address },
	{ "from-address", N_("email"), N_("Set sender email address"),
	  grecs_type_string, GRECS_DFLT, &from_address, 0, cb_email_address },
	{ "define-message", N_("ident: string> <text: string"),
	  N_("Define message text"),
	  grecs_type_string, GRECS_DFLT, NULL, 0, cb_define_message },
	{ "mail-statistics", NULL, N_("Send statistics"),
	  grecs_type_section, GRECS_DFLT, NULL, 0, NULL, NULL,
	  mail_statistics_kw },

	{ NULL }
};

int
wy_open(grecs_node_t *node)
{
	int rc = 0;

        mu_register_all_mailer_formats();
	mu_stdstream_setup(MU_STDSTREAM_RESET_NONE);
	mu_log_tag = wy_syslog_tag;
	mu_log_facility = wy_log_facility;
	mu_stdstream_strerr_setup(wy_log_to_stderr ?
				  MU_STRERR_STDERR : MU_STRERR_SYSLOG);

	if (node) {
		rc = grecs_tree_process(node->down, mail_kw);
		if (rc)
			return rc;
	}
	if (!mailer && (rc = mu_mailer_create(&mailer, NULL))) {
		const char *url = NULL;
		mu_mailer_get_url_default(&url);
		wy_log(LOG_ERR,
		       _("cannot create default mailer `%s': %s"), url,
		       mu_strerror(rc));
	}
	return rc;
}	

/* Replaces enum notification_target */
enum ntfrcpt {
	notify_read,		/* Read recipients from the message headers */
	notify_admin,		/* System administrator */
	notify_owner,		/* Project admin */
	notify_user		/* User (uploader) */
};
struct mailevt {
	enum ntfrcpt rcpt;      /* whom to notify */
	const char *msg;        /* message template */  
	const char *sign_keys;  /* GPG keys to sign the message with */
};

static struct mu_kwd target_tab[] = {
	{ "read",    notify_read },    /* Read recipients from the message
					  headers */
	{ "message", notify_read },
	{ "admin",   notify_admin },   /* System administrator */
	{ "owner",   notify_owner },   /* Project admin */
	{ "user",    notify_user },    /* User (uploader) */
	{ NULL }
};

static const char *
ntfrcpt_str(enum ntfrcpt tgt)
{
	const char *ret;
	
	if (mu_kwd_xlat_tok(target_tab, tgt, &ret)) {
		grecs_error(NULL, 0,
			    _("INTERNAL ERROR: "
			      "unknown notification target number: %d"),
			    tgt);
		return NULL;
	}
	return ret;
}

static int
string_to_ntfrcpt(grecs_locus_t *locus, const char *val, enum ntfrcpt *pret)
{
	int res;
	if (mu_kwd_xlat_name(target_tab, val, &res)) {
		grecs_error(locus, 0,
			    _("unknown notification target: %s"), val);
		return 1;
	}
	*pret = res;
	return 0;
}

static int
cb_recipient(enum grecs_callback_command cmd, grecs_node_t *node,
	     void *varptr, void *cb_data)
{
	enum ntfrcpt *tgt = varptr;
	grecs_locus_t *locus = &node->locus;
	grecs_value_t *value = node->v.value;

	if (wy_assert_string_arg(locus, cmd, value))
		return 1;
	string_to_ntfrcpt(&value->locus, value->v.string, tgt);
	return 0;
}

static struct grecs_keyword notify_event_kw[] = {
	{ "recipient", N_("who"), N_("Notify this recipient"),
	  grecs_type_string, GRECS_DFLT,
	  NULL, offsetof(struct mailevt, rcpt),
	  cb_recipient },
	{ "gpg-sign", N_("key"),
	  N_("Sign message with this key"),
	  grecs_type_string, GRECS_DFLT,
	  NULL, offsetof(struct mailevt, sign_keys) },
	{ "message", N_("text-or-id"),
	  N_("Text of the notification or identifier of a defined "
	     "message template"),
	  grecs_type_string, GRECS_DFLT,
	  NULL, offsetof(struct mailevt, msg) },	
	{ NULL }
};

void *
wy_config(grecs_node_t *node)
{
	int i;
	struct mailevt *evt = grecs_zalloc(sizeof(*evt));

        for (i = 0; notify_event_kw[i].ident; i++)
                notify_event_kw[i].varptr = evt;
	if (grecs_tree_process(node->down, notify_event_kw)) {
		free(evt);
		evt = NULL;
	}
	return evt;	
}
	
void
wy_flush()
{
	if (mailer_opened) {
		mu_mailer_close(mailer);
		mailer_opened = 0;
	}
}

static mu_address_t
get_uploader_email(wy_triplet_t trp, const char **errp)
{
	struct wy_user const *info = wy_triplet_get_uploader(trp);
	mu_address_t addr;
	mu_address_t rcpt = NULL;
	int rc;
	
	if (!info)
		return NULL;
	rc = mu_address_create(&addr, info->email);
	if (rc) {
		*errp = mu_strerror(rc);
		return NULL;
	}

	mu_address_set_personal(addr, 1, info->realname);

	/* This hack makes sure that mu_address_to_string (rcpt) will
	   return full email address (with personal part) */
	mu_address_union(&rcpt, addr);
	mu_address_destroy(&addr);

	return rcpt;
}

static mu_address_t
get_owner_address(wy_triplet_t trp)
{
	struct wy_user *wp;
	mu_address_t rcpt = NULL;

	for (wp = wy_triplet_get_admins(trp); wp; wp = wp->next) {
		mu_address_t addr;
		if (mu_address_create(&addr, wp->email))
			continue;
		if (wp->realname)
			mu_address_set_personal(addr, 1, wp->realname);

		mu_address_union(&rcpt, addr);
		mu_address_destroy(&addr);
	}

	return rcpt;
}

static const char *
expand_email_admin(struct wy_metadef *def, void *data)
{
	if (mu_address_aget_printable(admin_address, &def->storage) == 0)
		def->value = def->storage;
	else
		def->value = "";
	return def->value;
}

static const char *
expand_email_owner(struct wy_metadef *def, void *data)
{
	wy_triplet_t trp = data;
	mu_address_t addr;

	addr = get_owner_address(trp);
	if (!addr) {
		wy_log(LOG_ERR, _("cannot get email of the %s's owner"),
		       wy_triplet_project(trp));
		def->value = "";
	} else {
		if (mu_address_aget_printable(addr, &def->storage) == 0)
			def->value = def->storage;
		else
			def->value = "";
		mu_address_destroy(&addr);
	}
	return def->value;
}

static void
t_notify(struct mailevt *evt, int ev, wy_triplet_t trp)
{
	mu_address_t rcpt = NULL;
	const char *errp;
	char *text;
	const char *msg;
	static struct wy_metadef email_meta[] = {
		{ "email:admin", NULL, expand_email_admin, NULL },
		{ "email:owner", NULL, expand_email_owner, NULL },
		{ NULL }
	};

	switch (evt->rcpt) {
	case notify_read:
		rcpt = NULL;
		break;

	case notify_admin:
		rcpt = mu_address_dup(admin_address);
		break;

	case notify_user:
		rcpt = get_uploader_email(trp, &errp);
		if (!rcpt) {
			wy_log(LOG_ERR,
			       _("not notifying %s (project %s) about %s: %s"),
			       ntfrcpt_str(evt->rcpt),
			       wy_triplet_project(trp),
			       wy_event_str(ev),
			       gettext(errp));
			return;
		}
		break;

	case notify_owner:
		rcpt = get_owner_address(trp);
		if (!rcpt) {
			wy_log(LOG_ERR,
			       _("not notifying %s (project %s) about %s"),
			       ntfrcpt_str(evt->rcpt),
			       wy_triplet_project(trp),
			       wy_event_str(ev));
			return;
		}
	}

	if (wy_debug_level) {
		if (rcpt) {
			const char *s;

			if (mu_address_sget_printable(rcpt, &s) == 0)
				wy_log(LOG_DEBUG,
				       _("notifying %s (project %s) about %s"),
				       s, wy_triplet_project(trp),
				       wy_event_str(ev));
		} else
			wy_log(LOG_DEBUG,
			       _("notifying message recipients (project %s) "
				 "about %s"),
			       wy_triplet_project(trp),
			       wy_event_str(ev));
	}

	msg = resolve_message_template(evt->msg);
	if (!msg)
		wy_log(LOG_ERR, _("undefined message reference: %s"),
		       evt->msg);
	else {
		text = wy_triplet_expand_param(msg, trp, email_meta);
		mail_send_message(rcpt, text, evt->sign_keys);
		free(text);
	}
	
	mu_address_destroy(&rcpt);
}


static void
mail_stats(struct mailevt *evt)
{
	const char *tmpl;
	char *text;

	if (!admin_stat_message || !wy_stat_mask_p(mail_admin_mask) || !mailer)
		return;

	if (!admin_address) {
		wy_log(LOG_ERR,
		       _("cannot mail statistics: admin-address not defined"));
		return;
	}

	if (wy_debug_level) {
		const char *s;

		if (mu_address_sget_printable(admin_address, &s) == 0)
			wy_log(LOG_DEBUG, _("sending stats to %s"), s);
	}

	tmpl = resolve_message_template(admin_stat_message);
	if (!tmpl) {
		wy_log(LOG_ERR, _("undefined message reference: %s"),
		       admin_stat_message);
		return;
	}
	text = wy_expand_stats(tmpl);
	
	mail_send_message(admin_address, text, admin_stat_sign_key);

	free(text);
}

void
wy_notify(void *data, int ev, wy_triplet_t trp)
{
	struct mailevt *evt = data;

	if (trp)
		t_notify(evt, ev, trp);
	else if (ev == wy_ev_statistics)
		mail_stats(evt);
}

void
wy_help(void)
{
	static char *docstring = "\n\
Mod_mailutils sends notifications about various Wydawca events\n\
via electronic mail.\n";
		
	static struct grecs_keyword init_top[] = {
		{ "module-init", "'mailutils",
		  "module initialization",
		  grecs_type_section, GRECS_INAC, NULL, 0, NULL, NULL,
		  mail_kw },
		{ NULL }
	};
	
	static struct grecs_keyword config_top[] = {
		{ "module-config", NULL,
		  "module configuration",
		  grecs_type_section, GRECS_INAC, NULL, 0, NULL, NULL,
		  notify_event_kw },
		{ NULL }
	};

	puts(docstring);
	printf("Configuration statements:\n\n");
	grecs_print_statement_array(init_top, 1, 0, stdout);

	printf("\n\n# Usage in notify-event statement:\n");
	printf("notify-event {\n  ...");
	grecs_print_statement_array(config_top, 1, 1, stdout);
	printf("}\n");
}

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