From 05dedace84ef8c93fea5309c3ac55f889011429b Mon Sep 17 00:00:00 2001
From: CVS to git conversion script <webmaster@postgresql.org>
Date: Thu, 20 Jun 2002 20:29:55 +0000
Subject: This commit was manufactured by cvs2git to create branch
 'ecpg_big_bison'.

Sprout from master 2002-06-20 20:29:54 UTC Bruce Momjian <bruce@momjian.us> 'Update copyright to 2002.'
Delete:
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    HISTORY
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    src/test/regress/sql/create_view.sql
    src/test/regress/sql/date.sql
    src/test/regress/sql/domain.sql
    src/test/regress/sql/drop.sql
    src/test/regress/sql/errors.sql
    src/test/regress/sql/euc_cn.sql
    src/test/regress/sql/euc_jp.sql
    src/test/regress/sql/euc_kr.sql
    src/test/regress/sql/euc_tw.sql
    src/test/regress/sql/float4.sql
    src/test/regress/sql/float8.sql
    src/test/regress/sql/foreign_key.sql
    src/test/regress/sql/geometry.sql
    src/test/regress/sql/hash_index.sql
    src/test/regress/sql/horology.sql
    src/test/regress/sql/inet.sql
    src/test/regress/sql/inherit.sql
    src/test/regress/sql/insert.sql
    src/test/regress/sql/int2.sql
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    src/test/regress/sql/int8.sql
    src/test/regress/sql/interval.sql
    src/test/regress/sql/join.sql
    src/test/regress/sql/limit.sql
    src/test/regress/sql/lseg.sql
    src/test/regress/sql/mule_internal.sql
    src/test/regress/sql/name.sql
    src/test/regress/sql/numeric.sql
    src/test/regress/sql/numeric_big.sql
    src/test/regress/sql/numerology.sql
    src/test/regress/sql/oid.sql
    src/test/regress/sql/oidjoins.sql
    src/test/regress/sql/opr_sanity.sql
    src/test/regress/sql/path.sql
    src/test/regress/sql/plpgsql.sql
    src/test/regress/sql/point.sql
    src/test/regress/sql/polygon.sql
    src/test/regress/sql/portals.sql
    src/test/regress/sql/portals_p2.sql
    src/test/regress/sql/privileges.sql
    src/test/regress/sql/random.sql
    src/test/regress/sql/reltime.sql
    src/test/regress/sql/rules.sql
    src/test/regress/sql/sanity_check.sql
    src/test/regress/sql/select.sql
    src/test/regress/sql/select_distinct.sql
    src/test/regress/sql/select_distinct_on.sql
    src/test/regress/sql/select_having.sql
    src/test/regress/sql/select_implicit.sql
    src/test/regress/sql/select_into.sql
    src/test/regress/sql/select_views.sql
    src/test/regress/sql/sql_ascii.sql
    src/test/regress/sql/strings.sql
    src/test/regress/sql/subselect.sql
    src/test/regress/sql/temp.sql
    src/test/regress/sql/text.sql
    src/test/regress/sql/time.sql
    src/test/regress/sql/timestamp.sql
    src/test/regress/sql/timestamptz.sql
    src/test/regress/sql/timetz.sql
    src/test/regress/sql/tinterval.sql
    src/test/regress/sql/transactions.sql
    src/test/regress/sql/triggers.sql
    src/test/regress/sql/type_sanity.sql
    src/test/regress/sql/union.sql
    src/test/regress/sql/varchar.sql
    src/tools/RELEASE_CHANGES
    src/tools/backend/README
    src/tools/backend/backend_dirs.html
    src/tools/backend/flow.fig
    src/tools/backend/flow.gif
    src/tools/backend/index.html
    src/tools/ccsym
    src/tools/copyright
    src/tools/entab/Makefile
    src/tools/entab/entab.c
    src/tools/entab/entab.man
    src/tools/entab/halt.c
    src/tools/find_badmacros
    src/tools/find_static
    src/tools/find_typedef
    src/tools/make_ctags
    src/tools/make_diff/README
    src/tools/make_diff/cporig
    src/tools/make_diff/difforig
    src/tools/make_diff/rmorig
    src/tools/make_etags
    src/tools/make_keywords
    src/tools/make_mkid
    src/tools/pgcvslog
    src/tools/pginclude/README
    src/tools/pginclude/pgcompinclude
    src/tools/pginclude/pgdefine
    src/tools/pginclude/pgfixinclude
    src/tools/pginclude/pgrminclude
    src/tools/pgindent/README
    src/tools/pgindent/indent.bsd.patch
    src/tools/pgindent/pgcppindent
    src/tools/pgindent/pgindent
    src/tools/pgindent/pgjindent
    src/tutorial/Makefile
    src/tutorial/README
    src/tutorial/advanced.source
    src/tutorial/basics.source
    src/tutorial/beard.c
    src/tutorial/complex.c
    src/tutorial/complex.source
    src/tutorial/funcs.c
    src/tutorial/funcs.source
    src/tutorial/funcs_new.c
    src/tutorial/syscat.source
    src/utils/Makefile
    src/utils/README
    src/utils/dllinit.c
    src/utils/getopt.c
    src/utils/strdup.c
    src/win32.mak
---
 src/interfaces/libpq/fe-connect.c | 2816 -------------------------------------
 1 file changed, 2816 deletions(-)
 delete mode 100644 src/interfaces/libpq/fe-connect.c

(limited to 'src/interfaces/libpq/fe-connect.c')

diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
deleted file mode 100644
index 2380d0b0551..00000000000
--- a/src/interfaces/libpq/fe-connect.c
+++ /dev/null
@@ -1,2816 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * fe-connect.c
- *	  functions related to setting up a connection to the backend
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.188 2002/06/20 20:29:53 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-
-#include "postgres_fe.h"
-
-#include <sys/types.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <ctype.h>
-
-#include "libpq-fe.h"
-#include "libpq-int.h"
-#include "fe-auth.h"
-
-#ifdef WIN32
-#include "win32.h"
-#else
-#include <sys/socket.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-#include <arpa/inet.h>
-#endif
-
-#ifndef HAVE_STRDUP
-#include "strdup.h"
-#endif
-#ifdef HAVE_CRYPT_H
-#include <crypt.h>
-#endif
-
-#ifdef MULTIBYTE
-#include "mb/pg_wchar.h"
-#endif
-
-#ifdef WIN32
-static int
-inet_aton(const char *cp, struct in_addr * inp)
-{
-	unsigned long a = inet_addr(cp);
-
-	if (a == -1)
-		return 0;
-	inp->s_addr = a;
-	return 1;
-}
-#endif
-
-
-#define NOTIFYLIST_INITIAL_SIZE 10
-#define NOTIFYLIST_GROWBY 10
-
-
-/* ----------
- * Definition of the conninfo parameters and their fallback resources.
- *
- * If Environment-Var and Compiled-in are specified as NULL, no
- * fallback is available. If after all no value can be determined
- * for an option, an error is returned.
- *
- * The values for dbname and user are treated specially in conninfo_parse.
- * If the Compiled-in resource is specified as a NULL value, the
- * user is determined by fe_getauthname() and for dbname the user
- * name is copied.
- *
- * The Label and Disp-Char entries are provided for applications that
- * want to use PQconndefaults() to create a generic database connection
- * dialog. Disp-Char is defined as follows:
- *		""		Normal input field
- *		"*"		Password field - hide value
- *		"D"		Debug option - don't show by default
- *
- * PQconninfoOptions[] is a constant static array that we use to initialize
- * a dynamically allocated working copy.  All the "val" fields in
- * PQconninfoOptions[] *must* be NULL.	In a working copy, non-null "val"
- * fields point to malloc'd strings that should be freed when the working
- * array is freed (see PQconninfoFree).
- * ----------
- */
-static const PQconninfoOption PQconninfoOptions[] = {
-	/*
-	 * "authtype" is no longer used, so mark it "don't show".  We keep it
-	 * in the array so as not to reject conninfo strings from old apps
-	 * that might still try to set it.
-	 */
-	{"authtype", "PGAUTHTYPE", DefaultAuthtype, NULL,
-	"Database-Authtype", "D", 20},
-
-	{"service", "PGSERVICE", NULL, NULL,
-	"Database-Service", "", 20},
-
-	{"user", "PGUSER", NULL, NULL,
-	"Database-User", "", 20},
-
-	{"password", "PGPASSWORD", DefaultPassword, NULL,
-	"Database-Password", "*", 20},
-
-	{"dbname", "PGDATABASE", NULL, NULL,
-	"Database-Name", "", 20},
-
-	{"host", "PGHOST", NULL, NULL,
-	"Database-Host", "", 40},
-
-	{"hostaddr", "PGHOSTADDR", NULL, NULL,
-	"Database-Host-IPv4-Address", "", 15},		/* Room for
-												 * abc.def.ghi.jkl */
-
-	{"port", "PGPORT", DEF_PGPORT_STR, NULL,
-	"Database-Port", "", 6},
-
-	{"tty", "PGTTY", DefaultTty, NULL,
-	"Backend-Debug-TTY", "D", 40},
-
-	{"options", "PGOPTIONS", DefaultOption, NULL,
-	"Backend-Debug-Options", "D", 40},
-
-#ifdef USE_SSL
-	{"requiressl", "PGREQUIRESSL", "0", NULL,
-	"Require-SSL", "", 1},
-#endif
-
-	/* Terminating entry --- MUST BE LAST */
-	{NULL, NULL, NULL, NULL,
-	NULL, NULL, 0}
-};
-
-static const struct EnvironmentOptions
-{
-	const char *envName,
-			   *pgName;
-}	EnvironmentOptions[] =
-
-{
-	/* common user-interface settings */
-	{
-		"PGDATESTYLE", "datestyle"
-	},
-	{
-		"PGTZ", "timezone"
-	},
-#ifdef MULTIBYTE
-	{
-		"PGCLIENTENCODING", "client_encoding"
-	},
-#endif
-	/* internal performance-related settings */
-	{
-		"PGGEQO", "geqo"
-	},
-	{
-		NULL, NULL
-	}
-};
-
-
-static int	connectDBStart(PGconn *conn);
-static int	connectDBComplete(PGconn *conn);
-static bool PQsetenvStart(PGconn *conn);
-static PostgresPollingStatusType PQsetenvPoll(PGconn *conn);
-static PGconn *makeEmptyPGconn(void);
-static void freePGconn(PGconn *conn);
-static void closePGconn(PGconn *conn);
-static PQconninfoOption *conninfo_parse(const char *conninfo,
-			   PQExpBuffer errorMessage);
-static char *conninfo_getval(PQconninfoOption *connOptions,
-				const char *keyword);
-static void defaultNoticeProcessor(void *arg, const char *message);
-static int parseServiceInfo(PQconninfoOption *options,
-				 PQExpBuffer errorMessage);
-
-/*
- *		Connecting to a Database
- *
- * There are now four different ways a user of this API can connect to the
- * database.  Two are not recommended for use in new code, because of their
- * lack of extensibility with respect to the passing of options to the
- * backend.  These are PQsetdb and PQsetdbLogin (the former now being a macro
- * to the latter).
- *
- * If it is desired to connect in a synchronous (blocking) manner, use the
- * function PQconnectdb.
- *
- * To connect in an asychronous (non-blocking) manner, use the functions
- * PQconnectStart, and PQconnectPoll.
- *
- * Internally, the static functions connectDBStart, connectDBComplete
- * are part of the connection procedure.
- */
-
-/*
- *		PQconnectdb
- *
- * establishes a connection to a postgres backend through the postmaster
- * using connection information in a string.
- *
- * The conninfo string is a white-separated list of
- *
- *	   option = value
- *
- * definitions. Value might be a single value containing no whitespaces or
- * a single quoted string. If a single quote should appear anywhere in
- * the value, it must be escaped with a backslash like \'
- *
- * Returns a PGconn* which is needed for all subsequent libpq calls, or NULL
- * if a memory allocation failed.
- * If the status field of the connection returned is CONNECTION_BAD,
- * then some fields may be null'ed out instead of having valid values.
- *
- * You should call PQfinish (if conn is not NULL) regardless of whether this
- * call succeeded.
- */
-PGconn *
-PQconnectdb(const char *conninfo)
-{
-	PGconn	   *conn = PQconnectStart(conninfo);
-
-	if (conn && conn->status != CONNECTION_BAD)
-		(void) connectDBComplete(conn);
-
-	return conn;
-}
-
-/*
- *		PQconnectStart
- *
- * Begins the establishment of a connection to a postgres backend through the
- * postmaster using connection information in a string.
- *
- * See comment for PQconnectdb for the definition of the string format.
- *
- * Returns a PGconn*.  If NULL is returned, a malloc error has occurred, and
- * you should not attempt to proceed with this connection.	If the status
- * field of the connection returned is CONNECTION_BAD, an error has
- * occurred. In this case you should call PQfinish on the result, (perhaps
- * inspecting the error message first).  Other fields of the structure may not
- * be valid if that occurs.  If the status field is not CONNECTION_BAD, then
- * this stage has succeeded - call PQconnectPoll, using select(2) to see when
- * this is necessary.
- *
- * See PQconnectPoll for more info.
- */
-PGconn *
-PQconnectStart(const char *conninfo)
-{
-	PGconn	   *conn;
-	PQconninfoOption *connOptions;
-	char	   *tmp;
-
-	/*
-	 * Allocate memory for the conn structure
-	 */
-
-	conn = makeEmptyPGconn();
-	if (conn == NULL)
-		return (PGconn *) NULL;
-
-	/*
-	 * Parse the conninfo string
-	 */
-	connOptions = conninfo_parse(conninfo, &conn->errorMessage);
-	if (connOptions == NULL)
-	{
-		conn->status = CONNECTION_BAD;
-		/* errorMessage is already set */
-		return conn;
-	}
-
-	/*
-	 * Move option values into conn structure
-	 */
-	tmp = conninfo_getval(connOptions, "hostaddr");
-	conn->pghostaddr = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "host");
-	conn->pghost = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "port");
-	conn->pgport = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "tty");
-	conn->pgtty = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "options");
-	conn->pgoptions = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "dbname");
-	conn->dbName = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "user");
-	conn->pguser = tmp ? strdup(tmp) : NULL;
-	tmp = conninfo_getval(connOptions, "password");
-	conn->pgpass = tmp ? strdup(tmp) : NULL;
-#ifdef USE_SSL
-	tmp = conninfo_getval(connOptions, "requiressl");
-	if (tmp && tmp[0] == '1')
-		conn->require_ssl = true;
-#endif
-
-	/*
-	 * Free the option info - all is in conn now
-	 */
-	PQconninfoFree(connOptions);
-
-	/*
-	 * Allow unix socket specification in the host name
-	 */
-	if (conn->pghost && conn->pghost[0] == '/')
-	{
-		if (conn->pgunixsocket)
-			free(conn->pgunixsocket);
-		conn->pgunixsocket = conn->pghost;
-		conn->pghost = NULL;
-	}
-
-	/*
-	 * Connect to the database
-	 */
-	if (!connectDBStart(conn))
-	{
-		/* Just in case we failed to set it in connectDBStart */
-		conn->status = CONNECTION_BAD;
-	}
-
-	return conn;
-}
-
-/*
- *		PQconndefaults
- *
- * Parse an empty string like PQconnectdb() would do and return the
- * working connection options array.
- *
- * Using this function, an application may determine all possible options
- * and their current default values.
- *
- * NOTE: as of PostgreSQL 7.0, the returned array is dynamically allocated
- * and should be freed when no longer needed via PQconninfoFree().	(In prior
- * versions, the returned array was static, but that's not thread-safe.)
- * Pre-7.0 applications that use this function will see a small memory leak
- * until they are updated to call PQconninfoFree.
- */
-PQconninfoOption *
-PQconndefaults(void)
-{
-	PQExpBufferData errorBuf;
-	PQconninfoOption *connOptions;
-
-	initPQExpBuffer(&errorBuf);
-	connOptions = conninfo_parse("", &errorBuf);
-	termPQExpBuffer(&errorBuf);
-	return connOptions;
-}
-
-/* ----------------
- *		PQsetdbLogin
- *
- * establishes a connection to a postgres backend through the postmaster
- * at the specified host and port.
- *
- * returns a PGconn* which is needed for all subsequent libpq calls
- * if the status field of the connection returned is CONNECTION_BAD,
- * then some fields may be null'ed out instead of having valid values
- *
- *	Uses these environment variables:
- *
- *	  PGHOST	   identifies host to which to connect if <pghost> argument
- *				   is NULL or a null string.
- *
- *	  PGPORT	   identifies TCP port to which to connect if <pgport> argument
- *				   is NULL or a null string.
- *
- *	  PGTTY		   identifies tty to which to send messages if <pgtty> argument
- *				   is NULL or a null string.
- *
- *	  PGOPTIONS    identifies connection options if <pgoptions> argument is
- *				   NULL or a null string.
- *
- *	  PGUSER	   Postgres username to associate with the connection.
- *
- *	  PGPASSWORD   The user's password.
- *
- *	  PGDATABASE   name of database to which to connect if <pgdatabase>
- *				   argument is NULL or a null string
- *
- *	  None of the above need be defined.  There are defaults for all of them.
- *
- * To support "delimited identifiers" for database names, only convert
- * the database name to lower case if it is not surrounded by double quotes.
- * Otherwise, strip the double quotes but leave the reset of the string intact.
- * - thomas 1997-11-08
- * ----------------
- */
-PGconn *
-PQsetdbLogin(const char *pghost, const char *pgport, const char *pgoptions,
-			 const char *pgtty, const char *dbName, const char *login,
-			 const char *pwd)
-{
-	PGconn	   *conn;
-	char	   *tmp;			/* An error message from some service we
-								 * call. */
-	bool		error = FALSE;	/* We encountered an error. */
-
-	conn = makeEmptyPGconn();
-	if (conn == NULL)
-		return (PGconn *) NULL;
-
-	if (pghost)
-		conn->pghost = strdup(pghost);
-	else if ((tmp = getenv("PGHOST")) != NULL)
-		conn->pghost = strdup(tmp);
-
-	if (pgport == NULL || pgport[0] == '\0')
-	{
-		tmp = getenv("PGPORT");
-		if (tmp == NULL || tmp[0] == '\0')
-			tmp = DEF_PGPORT_STR;
-		conn->pgport = strdup(tmp);
-	}
-	else
-		conn->pgport = strdup(pgport);
-
-	/*
-	 * We don't allow unix socket path as a function parameter. This
-	 * allows unix socket specification in the host name.
-	 */
-	if (conn->pghost && conn->pghost[0] == '/')
-	{
-		if (conn->pgunixsocket)
-			free(conn->pgunixsocket);
-		conn->pgunixsocket = conn->pghost;
-		conn->pghost = NULL;
-	}
-
-	if (pgtty == NULL)
-	{
-		if ((tmp = getenv("PGTTY")) == NULL)
-			tmp = DefaultTty;
-		conn->pgtty = strdup(tmp);
-	}
-	else
-		conn->pgtty = strdup(pgtty);
-
-	if (pgoptions == NULL)
-	{
-		if ((tmp = getenv("PGOPTIONS")) == NULL)
-			tmp = DefaultOption;
-		conn->pgoptions = strdup(tmp);
-	}
-	else
-		conn->pgoptions = strdup(pgoptions);
-
-	if (login)
-		conn->pguser = strdup(login);
-	else if ((tmp = getenv("PGUSER")) != NULL)
-		conn->pguser = strdup(tmp);
-	else
-	{
-		/* fe-auth.c has not been fixed to support PQExpBuffers, so: */
-		conn->pguser = fe_getauthname(conn->errorMessage.data);
-		conn->errorMessage.len = strlen(conn->errorMessage.data);
-	}
-
-	if (conn->pguser == NULL)
-	{
-		error = TRUE;
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("could not determine the PostgreSQL user name to use\n"));
-	}
-
-	if (pwd)
-		conn->pgpass = strdup(pwd);
-	else if ((tmp = getenv("PGPASSWORD")) != NULL)
-		conn->pgpass = strdup(tmp);
-	else
-		conn->pgpass = strdup(DefaultPassword);
-
-	if (dbName == NULL)
-	{
-		if ((tmp = getenv("PGDATABASE")) != NULL)
-			conn->dbName = strdup(tmp);
-		else if (conn->pguser)
-			conn->dbName = strdup(conn->pguser);
-	}
-	else
-		conn->dbName = strdup(dbName);
-
-
-#ifdef USE_SSL
-	if ((tmp = getenv("PGREQUIRESSL")) != NULL)
-		conn->require_ssl = (tmp[0] == '1') ? true : false;
-#endif
-
-	if (error)
-		conn->status = CONNECTION_BAD;
-	else
-	{
-		if (connectDBStart(conn))
-			(void) connectDBComplete(conn);
-	}
-
-	return conn;
-}
-
-
-#ifdef NOT_USED					/* because it's broken */
-/*
- * update_db_info -
- * get all additional info out of dbName
- *
- */
-static int
-update_db_info(PGconn *conn)
-{
-	char	   *tmp,
-			   *tmp2,
-			   *old = conn->dbName;
-
-	if (strchr(conn->dbName, '@') != NULL)
-	{
-		/* old style: dbname[@server][:port] */
-		tmp = strrchr(conn->dbName, ':');
-		if (tmp != NULL)		/* port number given */
-		{
-			if (conn->pgport)
-				free(conn->pgport);
-			conn->pgport = strdup(tmp + 1);
-			*tmp = '\0';
-		}
-
-		tmp = strrchr(conn->dbName, '@');
-		if (tmp != NULL)		/* host name given */
-		{
-			if (conn->pghost)
-				free(conn->pghost);
-			conn->pghost = strdup(tmp + 1);
-			*tmp = '\0';
-		}
-
-		conn->dbName = strdup(old);
-		free(old);
-	}
-	else
-	{
-		int			offset;
-
-		/*
-		 * only allow protocols tcp and unix
-		 */
-		if (strncmp(conn->dbName, "tcp:", 4) == 0)
-			offset = 4;
-		else if (strncmp(conn->dbName, "unix:", 5) == 0)
-			offset = 5;
-		else
-			return 0;
-
-		if (strncmp(conn->dbName + offset, "postgresql://", strlen("postgresql://")) == 0)
-		{
-
-			/*-------
-			 * new style:
-			 *	<tcp|unix>:postgresql://server[:port|:/unixsocket/path:]
-			 *	[/db name][?options]
-			 *-------
-			 */
-			offset += strlen("postgresql://");
-
-			tmp = strrchr(conn->dbName + offset, '?');
-			if (tmp != NULL)	/* options given */
-			{
-				if (conn->pgoptions)
-					free(conn->pgoptions);
-				conn->pgoptions = strdup(tmp + 1);
-				*tmp = '\0';
-			}
-
-			tmp = strrchr(conn->dbName + offset, '/');
-			if (tmp != NULL)	/* database name given */
-			{
-				if (conn->dbName)
-					free(conn->dbName);
-				conn->dbName = strdup(tmp + 1);
-				*tmp = '\0';
-			}
-			else
-			{
-				/*
-				 * Why do we default only this value from the environment
-				 * again?
-				 */
-				if ((tmp = getenv("PGDATABASE")) != NULL)
-				{
-					if (conn->dbName)
-						free(conn->dbName);
-					conn->dbName = strdup(tmp);
-				}
-				else if (conn->pguser)
-				{
-					if (conn->dbName)
-						free(conn->dbName);
-					conn->dbName = strdup(conn->pguser);
-				}
-			}
-
-			tmp = strrchr(old + offset, ':');
-			if (tmp != NULL)	/* port number or Unix socket path given */
-			{
-				*tmp = '\0';
-				if ((tmp2 = strchr(tmp + 1, ':')) != NULL)
-				{
-					if (strncmp(old, "unix:", 5) != 0)
-					{
-						printfPQExpBuffer(&conn->errorMessage,
-										  "connectDBStart() -- "
-								"socket name can only be specified with "
-										  "non-TCP\n");
-						return 1;
-					}
-					*tmp2 = '\0';
-					if (conn->pgunixsocket)
-						free(conn->pgunixsocket);
-					conn->pgunixsocket = strdup(tmp + 1);
-				}
-				else
-				{
-					if (conn->pgport)
-						free(conn->pgport);
-					conn->pgport = strdup(tmp + 1);
-					if (conn->pgunixsocket)
-						free(conn->pgunixsocket);
-					conn->pgunixsocket = NULL;
-				}
-			}
-
-			if (strncmp(old, "unix:", 5) == 0)
-			{
-				if (conn->pghost)
-					free(conn->pghost);
-				conn->pghost = NULL;
-				if (strcmp(old + offset, "localhost") != 0)
-				{
-					printfPQExpBuffer(&conn->errorMessage,
-									  "connectDBStart() -- "
-									  "non-TCP access only possible on "
-									  "localhost\n");
-					return 1;
-				}
-			}
-			else
-			{
-				if (conn->pghost)
-					free(conn->pghost);
-				conn->pghost = strdup(old + offset);
-			}
-			free(old);
-		}
-	}
-
-	return 0;
-}
-#endif   /* NOT_USED */
-
-
-/* ----------
- * connectMakeNonblocking -
- * Make a connection non-blocking.
- * Returns 1 if successful, 0 if not.
- * ----------
- */
-static int
-connectMakeNonblocking(PGconn *conn)
-{
-#if defined(WIN32) || defined(__BEOS__)
-	int			on = 1;
-#endif
-
-#if defined(WIN32)
-	if (ioctlsocket(conn->sock, FIONBIO, &on) != 0)
-#elif defined(__BEOS__)
-		if (ioctl(conn->sock, FIONBIO, &on) != 0)
-#else
-	if (fcntl(conn->sock, F_SETFL, O_NONBLOCK) < 0)
-#endif
-	{
-		printfPQExpBuffer(&conn->errorMessage,
-		libpq_gettext("could not set socket to non-blocking mode: %s\n"),
-						  SOCK_STRERROR(SOCK_ERRNO));
-		return 0;
-	}
-
-	return 1;
-}
-
-/* ----------
- * connectNoDelay -
- * Sets the TCP_NODELAY socket option.
- * Returns 1 if successful, 0 if not.
- * ----------
- */
-static int
-connectNoDelay(PGconn *conn)
-{
-	int			on = 1;
-
-	if (setsockopt(conn->sock, IPPROTO_TCP, TCP_NODELAY,
-				   (char *) &on,
-				   sizeof(on)) < 0)
-	{
-		printfPQExpBuffer(&conn->errorMessage,
-		libpq_gettext("could not set socket to TCP no delay mode: %s\n"),
-						  SOCK_STRERROR(SOCK_ERRNO));
-		return 0;
-	}
-
-	return 1;
-}
-
-
-/* ----------
- * connectFailureMessage -
- * create a friendly error message on connection failure.
- * ----------
- */
-static void
-connectFailureMessage(PGconn *conn, int errorno)
-{
-	if (conn->raddr.sa.sa_family == AF_UNIX)
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext(
-									  "could not connect to server: %s\n"
-						"\tIs the server running locally and accepting\n"
-						  "\tconnections on Unix domain socket \"%s\"?\n"
-										),
-						  SOCK_STRERROR(errorno),
-						  conn->raddr.un.sun_path);
-	else
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext(
-									  "could not connect to server: %s\n"
-					 "\tIs the server running on host %s and accepting\n"
-									 "\tTCP/IP connections on port %s?\n"
-										),
-						  SOCK_STRERROR(errorno),
-						  conn->pghost
-						  ? conn->pghost
-						  : (conn->pghostaddr
-							 ? conn->pghostaddr
-							 : "???"),
-						  conn->pgport);
-}
-
-
-/* ----------
- * connectDBStart -
- * Start to make a connection to the backend so it is ready to receive
- * queries.
- * Returns 1 if successful, 0 if not.
- * ----------
- */
-static int
-connectDBStart(PGconn *conn)
-{
-	int			portno,
-				family;
-
-#ifdef USE_SSL
-	StartupPacket np;			/* Used to negotiate SSL connection */
-	char		SSLok;
-#endif
-
-	if (!conn)
-		return 0;
-
-#ifdef NOT_USED
-
-	/*
-	 * parse dbName to get all additional info in it, if any
-	 */
-	if (update_db_info(conn) != 0)
-		goto connect_errReturn;
-#endif
-
-	/* Ensure our buffers are empty */
-	conn->inStart = conn->inCursor = conn->inEnd = 0;
-	conn->outCount = 0;
-
-	/*
-	 * Set up the connection to postmaster/backend. Note that this
-	 * supports IPv4 and UDP only.
-	 */
-
-	MemSet((char *) &conn->raddr, 0, sizeof(conn->raddr));
-
-	if (conn->pghostaddr != NULL && conn->pghostaddr[0] != '\0')
-	{
-		/* Using pghostaddr avoids a hostname lookup */
-		/* Note that this supports IPv4 only */
-		struct in_addr addr;
-
-		if (!inet_aton(conn->pghostaddr, &addr))
-		{
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid host address: %s\n"),
-							  conn->pghostaddr);
-			goto connect_errReturn;
-		}
-
-		family = AF_INET;
-
-		memmove((char *) &(conn->raddr.in.sin_addr),
-				(char *) &addr, sizeof(addr));
-	}
-	else if (conn->pghost != NULL && conn->pghost[0] != '\0')
-	{
-		/* Using pghost, so we have to look-up the hostname */
-		struct hostent *hp;
-
-		hp = gethostbyname(conn->pghost);
-		if ((hp == NULL) || (hp->h_addrtype != AF_INET))
-		{
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("unknown host name: %s\n"),
-							  conn->pghost);
-			goto connect_errReturn;
-		}
-		family = AF_INET;
-
-		memmove((char *) &(conn->raddr.in.sin_addr),
-				(char *) hp->h_addr,
-				hp->h_length);
-	}
-	else
-	{
-		/* pghostaddr and pghost are NULL, so use Unix domain socket */
-		family = AF_UNIX;
-	}
-
-	/* Set family */
-	conn->raddr.sa.sa_family = family;
-
-	/* Set port number */
-	if (conn->pgport != NULL && conn->pgport[0] != '\0')
-		portno = atoi(conn->pgport);
-	else
-		portno = DEF_PGPORT;
-
-	if (family == AF_INET)
-	{
-		conn->raddr.in.sin_port = htons((unsigned short) (portno));
-		conn->raddr_len = sizeof(struct sockaddr_in);
-	}
-#ifdef HAVE_UNIX_SOCKETS
-	else
-	{
-		UNIXSOCK_PATH(conn->raddr.un, portno, conn->pgunixsocket);
-		conn->raddr_len = UNIXSOCK_LEN(conn->raddr.un);
-#ifdef USE_SSL
-		/* Don't bother requesting SSL over a Unix socket */
-		conn->allow_ssl_try = false;
-		conn->require_ssl = false;
-#endif
-	}
-#endif
-
-	/* Open a socket */
-	if ((conn->sock = socket(family, SOCK_STREAM, 0)) < 0)
-	{
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("could not create socket: %s\n"),
-						  SOCK_STRERROR(SOCK_ERRNO));
-		goto connect_errReturn;
-	}
-
-	/*
-	 * Set the right options. Normally, we need nonblocking I/O, and we
-	 * don't want delay of outgoing data for AF_INET sockets.  If we are
-	 * using SSL, then we need the blocking I/O (XXX Can this be fixed?).
-	 */
-
-	if (family == AF_INET)
-	{
-		if (!connectNoDelay(conn))
-			goto connect_errReturn;
-	}
-
-#if !defined(USE_SSL)
-	if (connectMakeNonblocking(conn) == 0)
-		goto connect_errReturn;
-#endif
-
-	/* ----------
-	 * Start / make connection.  We are hopefully in non-blocking mode
-	 * now, but it is possible that:
-	 *	 1. Older systems will still block on connect, despite the
-	 *		non-blocking flag. (Anyone know if this is true?)
-	 *	 2. We are using SSL.
-	 * Thus, we have to make arrangements for all eventualities.
-	 * ----------
-	 */
-retry1:
-	if (connect(conn->sock, &conn->raddr.sa, conn->raddr_len) < 0)
-	{
-		if (SOCK_ERRNO == EINTR)
-			/* Interrupted system call - we'll just try again */
-			goto retry1;
-
-		if (SOCK_ERRNO == EINPROGRESS || SOCK_ERRNO == EWOULDBLOCK || SOCK_ERRNO == 0)
-		{
-			/*
-			 * This is fine - we're in non-blocking mode, and the
-			 * connection is in progress.
-			 */
-			conn->status = CONNECTION_STARTED;
-		}
-		else
-		{
-			/* Something's gone wrong */
-			connectFailureMessage(conn, SOCK_ERRNO);
-			goto connect_errReturn;
-		}
-	}
-	else
-	{
-		/* We're connected already */
-		conn->status = CONNECTION_MADE;
-	}
-
-#ifdef USE_SSL
-	/* Attempt to negotiate SSL usage */
-	if (conn->allow_ssl_try)
-	{
-		memset((char *) &np, 0, sizeof(np));
-		np.protoVersion = htonl(NEGOTIATE_SSL_CODE);
-		if (pqPacketSend(conn, (char *) &np, sizeof(StartupPacket)) != STATUS_OK)
-		{
-			printfPQExpBuffer(&conn->errorMessage,
-			libpq_gettext("could not send SSL negotiation packet: %s\n"),
-							  SOCK_STRERROR(SOCK_ERRNO));
-			goto connect_errReturn;
-		}
-retry2:
-		/* Now receive the postmasters response */
-		if (recv(conn->sock, &SSLok, 1, 0) != 1)
-		{
-			if (SOCK_ERRNO == EINTR)
-				/* Interrupted system call - we'll just try again */
-				goto retry2;
-
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("could not receive server response to SSL negotiation packet: %s\n"),
-							  SOCK_STRERROR(SOCK_ERRNO));
-			goto connect_errReturn;
-		}
-		if (SSLok == 'S')
-		{
-			if (pqsecure_initialize(conn) == -1 ||
-				pqsecure_open_client(conn) == -1)
-			{
-				goto connect_errReturn;
-			}
-			/* SSL connection finished. Continue to send startup packet */
-		}
-		else if (SSLok == 'E')
-		{
-			/* Received error - probably protocol mismatch */
-			if (conn->Pfdebug)
-				fprintf(conn->Pfdebug, "Postmaster reports error, attempting fallback to pre-7.0.\n");
-			pqsecure_close(conn);
-#ifdef WIN32
-			closesocket(conn->sock);
-#else
-			close(conn->sock);
-#endif
-			conn->sock = -1;
-			conn->allow_ssl_try = FALSE;
-			return connectDBStart(conn);
-		}
-		else if (SSLok != 'N')
-		{
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("received invalid response to SSL negotiation: %c\n"),
-							  SSLok);
-			goto connect_errReturn;
-		}
-	}
-	if (conn->require_ssl && !conn->ssl)
-	{
-		/* Require SSL, but server does not support/want it */
-		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("server does not support SSL, but SSL was required\n"));
-		goto connect_errReturn;
-	}
-#endif
-
-
-	/*
-	 * This makes the connection non-blocking, for all those cases which
-	 * forced us not to do it above.
-	 */
-#if defined(USE_SSL)
-	if (connectMakeNonblocking(conn) == 0)
-		goto connect_errReturn;
-#endif
-
-	return 1;
-
-connect_errReturn:
-	if (conn->sock >= 0)
-	{
-		pqsecure_close(conn);
-#ifdef WIN32
-		closesocket(conn->sock);
-#else
-		close(conn->sock);
-#endif
-		conn->sock = -1;
-	}
-	conn->status = CONNECTION_BAD;
-
-	return 0;
-}
-
-
-/*
- *		connectDBComplete
- *
- * Block and complete a connection.
- *
- * Returns 1 on success, 0 on failure.
- */
-static int
-connectDBComplete(PGconn *conn)
-{
-	PostgresPollingStatusType flag = PGRES_POLLING_WRITING;
-
-	if (conn == NULL || conn->status == CONNECTION_BAD)
-		return 0;
-
-	for (;;)
-	{
-		/*
-		 * Wait, if necessary.	Note that the initial state (just after
-		 * PQconnectStart) is to wait for the socket to select for
-		 * writing.
-		 */
-		switch (flag)
-		{
-			case PGRES_POLLING_ACTIVE:
-				break;
-
-			case PGRES_POLLING_OK:
-				return 1;		/* success! */
-
-			case PGRES_POLLING_READING:
-				if (pqWait(1, 0, conn))
-				{
-					conn->status = CONNECTION_BAD;
-					return 0;
-				}
-				break;
-
-			case PGRES_POLLING_WRITING:
-				if (pqWait(0, 1, conn))
-				{
-					conn->status = CONNECTION_BAD;
-					return 0;
-				}
-				break;
-
-			default:
-				/* Just in case we failed to set it in PQconnectPoll */
-				conn->status = CONNECTION_BAD;
-				return 0;
-		}
-
-		/*
-		 * Now try to advance the state machine.
-		 */
-		flag = PQconnectPoll(conn);
-	}
-}
-
-/* ----------------
- *		PQconnectPoll
- *
- * Poll an asynchronous connection.
- *
- * Returns a PostgresPollingStatusType.
- * Before calling this function, use select(2) to determine when data arrive.
- *
- * You must call PQfinish whether or not this fails.
- *
- * This function and PQconnectStart are intended to allow connections to be
- * made without blocking the execution of your program on remote I/O. However,
- * there are a number of caveats:
- *
- *	 o	If you call PQtrace, ensure that the stream object into which you trace
- *		will not block.
- *	 o	If you do not supply an IP address for the remote host (i.e. you
- *		supply a host name instead) then this function will block on
- *		gethostbyname.	You will be fine if using Unix sockets (i.e. by
- *		supplying neither a host name nor a host address).
- *	 o	If your backend wants to use Kerberos authentication then you must
- *		supply both a host name and a host address, otherwise this function
- *		may block on gethostname.
- *	 o	This function will block if compiled with USE_SSL.
- *
- * ----------------
- */
-PostgresPollingStatusType
-PQconnectPoll(PGconn *conn)
-{
-	PGresult   *res;
-
-	if (conn == NULL)
-		return PGRES_POLLING_FAILED;
-
-	/* Get the new data */
-	switch (conn->status)
-	{
-			/*
-			 * We really shouldn't have been polled in these two cases,
-			 * but we can handle it.
-			 */
-		case CONNECTION_BAD:
-			return PGRES_POLLING_FAILED;
-		case CONNECTION_OK:
-			return PGRES_POLLING_OK;
-
-			/* These are reading states */
-		case CONNECTION_AWAITING_RESPONSE:
-		case CONNECTION_AUTH_OK:
-			{
-				/* Load waiting data */
-				int			n = pqReadData(conn);
-
-				if (n < 0)
-					goto error_return;
-				if (n == 0)
-					return PGRES_POLLING_READING;
-
-				break;
-			}
-
-			/* These are writing states, so we just proceed. */
-		case CONNECTION_STARTED:
-		case CONNECTION_MADE:
-			break;
-
-		case CONNECTION_SETENV:
-			/* We allow PQsetenvPoll to decide whether to proceed */
-			break;
-
-		default:
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext(
-											"invalid connection state, "
-							 "probably indicative of memory corruption\n"
-											));
-			goto error_return;
-	}
-
-
-keep_going:						/* We will come back to here until there
-								 * is nothing left to parse. */
-	switch (conn->status)
-	{
-		case CONNECTION_STARTED:
-			{
-				ACCEPT_TYPE_ARG3 laddrlen;
-				int			optval;
-				ACCEPT_TYPE_ARG3 optlen = sizeof(optval);
-
-				/*
-				 * Write ready, since we've made it here, so the
-				 * connection has been made.
-				 */
-
-				/*
-				 * Now check (using getsockopt) that there is not an error
-				 * state waiting for us on the socket.
-				 */
-
-				if (getsockopt(conn->sock, SOL_SOCKET, SO_ERROR,
-							   (char *) &optval, &optlen) == -1)
-				{
-					printfPQExpBuffer(&conn->errorMessage,
-									  libpq_gettext("could not get socket error status: %s\n"),
-									  SOCK_STRERROR(SOCK_ERRNO));
-					goto error_return;
-				}
-				else if (optval != 0)
-				{
-					/*
-					 * When using a nonblocking connect, we will typically
-					 * see connect failures at this point, so provide a
-					 * friendly error message.
-					 */
-					connectFailureMessage(conn, optval);
-					goto error_return;
-				}
-
-				/* Fill in the client address */
-				laddrlen = sizeof(conn->laddr);
-				if (getsockname(conn->sock, &conn->laddr.sa, &laddrlen) < 0)
-				{
-					printfPQExpBuffer(&conn->errorMessage,
-									  libpq_gettext("could not get client address from socket: %s\n"),
-									  SOCK_STRERROR(SOCK_ERRNO));
-					goto error_return;
-				}
-
-				conn->status = CONNECTION_MADE;
-				return PGRES_POLLING_WRITING;
-			}
-
-		case CONNECTION_MADE:
-			{
-				StartupPacket sp;
-
-				/*
-				 * Initialize the startup packet.
-				 */
-
-				MemSet((char *) &sp, 0, sizeof(StartupPacket));
-
-				sp.protoVersion = (ProtocolVersion) htonl(PG_PROTOCOL_LIBPQ);
-
-				strncpy(sp.user, conn->pguser, SM_USER);
-				strncpy(sp.database, conn->dbName, SM_DATABASE);
-				strncpy(sp.tty, conn->pgtty, SM_TTY);
-
-				if (conn->pgoptions)
-					strncpy(sp.options, conn->pgoptions, SM_OPTIONS);
-
-				/*
-				 * Send the startup packet.
-				 *
-				 * Theoretically, this could block, but it really shouldn't
-				 * since we only got here if the socket is write-ready.
-				 */
-
-				if (pqPacketSend(conn, (char *) &sp,
-								 sizeof(StartupPacket)) != STATUS_OK)
-				{
-					printfPQExpBuffer(&conn->errorMessage,
-					libpq_gettext("could not send startup packet: %s\n"),
-									  SOCK_STRERROR(SOCK_ERRNO));
-					goto error_return;
-				}
-
-				conn->status = CONNECTION_AWAITING_RESPONSE;
-				return PGRES_POLLING_READING;
-			}
-
-			/*
-			 * Handle the authentication exchange: wait for postmaster
-			 * messages and respond as necessary.
-			 */
-		case CONNECTION_AWAITING_RESPONSE:
-			{
-				char		beresp;
-				AuthRequest areq;
-
-				/*
-				 * Scan the message from current point (note that if we
-				 * find the message is incomplete, we will return without
-				 * advancing inStart, and resume here next time).
-				 */
-				conn->inCursor = conn->inStart;
-
-				if (pqGetc(&beresp, conn))
-				{
-					/* We'll come back when there are more data */
-					return PGRES_POLLING_READING;
-				}
-
-				/* Handle errors. */
-				if (beresp == 'E')
-				{
-					if (pqGets(&conn->errorMessage, conn))
-					{
-						/* We'll come back when there are more data */
-						return PGRES_POLLING_READING;
-					}
-					/* OK, we read the message; mark data consumed */
-					conn->inStart = conn->inCursor;
-
-					/*
-					 * The postmaster typically won't end its message with
-					 * a newline, so add one to conform to libpq
-					 * conventions.
-					 */
-					appendPQExpBufferChar(&conn->errorMessage, '\n');
-					goto error_return;
-				}
-
-				/* Otherwise it should be an authentication request. */
-				if (beresp != 'R')
-				{
-					printfPQExpBuffer(&conn->errorMessage,
-									  libpq_gettext(
-								  "expected authentication request from "
-											  "server, but received %c\n"
-													),
-									  beresp);
-					goto error_return;
-				}
-
-				/* Get the type of request. */
-				if (pqGetInt((int *) &areq, 4, conn))
-				{
-					/* We'll come back when there are more data */
-					return PGRES_POLLING_READING;
-				}
-
-				/* Get the password salt if there is one. */
-				if (areq == AUTH_REQ_MD5)
-				{
-					if (pqGetnchar(conn->md5Salt,
-								   sizeof(conn->md5Salt), conn))
-					{
-						/* We'll come back when there are more data */
-						return PGRES_POLLING_READING;
-					}
-				}
-				if (areq == AUTH_REQ_CRYPT)
-				{
-					if (pqGetnchar(conn->cryptSalt,
-								   sizeof(conn->cryptSalt), conn))
-					{
-						/* We'll come back when there are more data */
-						return PGRES_POLLING_READING;
-					}
-				}
-
-				/*
-				 * OK, we successfully read the message; mark data
-				 * consumed
-				 */
-				conn->inStart = conn->inCursor;
-
-				/* Respond to the request if necessary. */
-
-				/*
-				 * Note that conn->pghost must be non-NULL if we are going
-				 * to avoid the Kerberos code doing a hostname look-up.
-				 */
-
-				/*
-				 * XXX fe-auth.c has not been fixed to support
-				 * PQExpBuffers, so:
-				 */
-				if (fe_sendauth(areq, conn, conn->pghost, conn->pgpass,
-								conn->errorMessage.data) != STATUS_OK)
-				{
-					conn->errorMessage.len = strlen(conn->errorMessage.data);
-					goto error_return;
-				}
-				conn->errorMessage.len = strlen(conn->errorMessage.data);
-
-				/*
-				 * Just make sure that any data sent by fe_sendauth is
-				 * flushed out.  Although this theoretically could block,
-				 * it really shouldn't since we don't send large auth
-				 * responses.
-				 */
-				if (pqFlush(conn))
-					goto error_return;
-
-				if (areq == AUTH_REQ_OK)
-				{
-					/* We are done with authentication exchange */
-					conn->status = CONNECTION_AUTH_OK;
-
-					/*
-					 * Set asyncStatus so that PQsetResult will think that
-					 * what comes back next is the result of a query.  See
-					 * below.
-					 */
-					conn->asyncStatus = PGASYNC_BUSY;
-				}
-
-				/* Look to see if we have more data yet. */
-				goto keep_going;
-			}
-
-		case CONNECTION_AUTH_OK:
-			{
-				/*
-				 * Now we expect to hear from the backend. A ReadyForQuery
-				 * message indicates that startup is successful, but we
-				 * might also get an Error message indicating failure.
-				 * (Notice messages indicating nonfatal warnings are also
-				 * allowed by the protocol, as is a BackendKeyData
-				 * message.) Easiest way to handle this is to let
-				 * PQgetResult() read the messages. We just have to fake
-				 * it out about the state of the connection, by setting
-				 * asyncStatus = PGASYNC_BUSY (done above).
-				 */
-
-				if (PQisBusy(conn))
-					return PGRES_POLLING_READING;
-
-				res = PQgetResult(conn);
-
-				/*
-				 * NULL return indicating we have gone to IDLE state is
-				 * expected
-				 */
-				if (res)
-				{
-					if (res->resultStatus != PGRES_FATAL_ERROR)
-						printfPQExpBuffer(&conn->errorMessage,
-										  libpq_gettext("unexpected message from server during startup\n"));
-
-					/*
-					 * if the resultStatus is FATAL, then
-					 * conn->errorMessage already has a copy of the error;
-					 * needn't copy it back. But add a newline if it's not
-					 * there already, since postmaster error messages may
-					 * not have one.
-					 */
-					if (conn->errorMessage.len <= 0 ||
-						conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
-						appendPQExpBufferChar(&conn->errorMessage, '\n');
-					PQclear(res);
-					goto error_return;
-				}
-
-				/*
-				 * Post-connection housekeeping. Prepare to send
-				 * environment variables to server.
-				 */
-				if (!PQsetenvStart(conn))
-					goto error_return;
-
-				conn->status = CONNECTION_SETENV;
-
-				goto keep_going;
-			}
-
-		case CONNECTION_SETENV:
-
-			/*
-			 * We pretend that the connection is OK for the duration of
-			 * these queries.
-			 */
-			conn->status = CONNECTION_OK;
-
-			switch (PQsetenvPoll(conn))
-			{
-				case PGRES_POLLING_OK:	/* Success */
-					conn->status = CONNECTION_OK;
-					return PGRES_POLLING_OK;
-
-				case PGRES_POLLING_READING:		/* Still going */
-					conn->status = CONNECTION_SETENV;
-					return PGRES_POLLING_READING;
-
-				case PGRES_POLLING_WRITING:		/* Still going */
-					conn->status = CONNECTION_SETENV;
-					return PGRES_POLLING_WRITING;
-
-				default:
-					conn->status = CONNECTION_SETENV;
-					goto error_return;
-			}
-			/* Unreachable */
-
-		default:
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext(
-										  "invalid connection state %c, "
-							 "probably indicative of memory corruption\n"
-											),
-							  conn->status);
-			goto error_return;
-	}
-
-	/* Unreachable */
-
-error_return:
-
-	/*
-	 * We used to close the socket at this point, but that makes it
-	 * awkward for those above us if they wish to remove this socket from
-	 * their own records (an fd_set for example).  We'll just have this
-	 * socket closed when PQfinish is called (which is compulsory even
-	 * after an error, since the connection structure must be freed).
-	 */
-	return PGRES_POLLING_FAILED;
-}
-
-
-/*
- *		PQsetenvStart
- *
- * Starts the process of passing the values of a standard set of environment
- * variables to the backend.
- */
-static bool
-PQsetenvStart(PGconn *conn)
-{
-	if (conn == NULL ||
-		conn->status == CONNECTION_BAD ||
-		conn->setenv_state != SETENV_STATE_IDLE)
-		return false;
-
-#ifdef MULTIBYTE
-	conn->setenv_state = SETENV_STATE_ENCODINGS_SEND;
-#else
-	conn->setenv_state = SETENV_STATE_OPTION_SEND;
-#endif
-
-	conn->next_eo = EnvironmentOptions;
-
-	return true;
-}
-
-/*
- *		PQsetenvPoll
- *
- * Polls the process of passing the values of a standard set of environment
- * variables to the backend.
- */
-static PostgresPollingStatusType
-PQsetenvPoll(PGconn *conn)
-{
-	PGresult   *res;
-
-#ifdef MULTIBYTE
-	static const char envname[] = "PGCLIENTENCODING";
-#endif
-
-	if (conn == NULL || conn->status == CONNECTION_BAD)
-		return PGRES_POLLING_FAILED;
-
-	/* Check whether there are any data for us */
-	switch (conn->setenv_state)
-	{
-			/* These are reading states */
-#ifdef MULTIBYTE
-		case SETENV_STATE_ENCODINGS_WAIT:
-#endif
-		case SETENV_STATE_OPTION_WAIT:
-			{
-				/* Load waiting data */
-				int			n = pqReadData(conn);
-
-				if (n < 0)
-					goto error_return;
-				if (n == 0)
-					return PGRES_POLLING_READING;
-
-				break;
-			}
-
-			/* These are writing states, so we just proceed. */
-#ifdef MULTIBYTE
-		case SETENV_STATE_ENCODINGS_SEND:
-#endif
-		case SETENV_STATE_OPTION_SEND:
-			break;
-
-			/* Should we raise an error if called when not active? */
-		case SETENV_STATE_IDLE:
-			return PGRES_POLLING_OK;
-
-		default:
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext(
-											"invalid setenv state %c, "
-							 "probably indicative of memory corruption\n"
-											),
-							  conn->setenv_state);
-			goto error_return;
-	}
-
-
-keep_going:						/* We will come back to here until there
-								 * is nothing left to parse. */
-	switch (conn->setenv_state)
-	{
-
-#ifdef MULTIBYTE
-		case SETENV_STATE_ENCODINGS_SEND:
-			{
-				const char *env;
-
-				env = getenv(envname);
-				if (!env || *env == '\0')
-				{
-					/*
-					 * query server encoding if PGCLIENTENCODING is not
-					 * specified
-					 */
-					if (!PQsendQuery(conn,
-									 "select getdatabaseencoding()"))
-						goto error_return;
-
-					conn->setenv_state = SETENV_STATE_ENCODINGS_WAIT;
-					return PGRES_POLLING_READING;
-				}
-				else
-				{
-					/* otherwise set client encoding in pg_conn struct */
-					int			encoding = pg_char_to_encoding(env);
-
-					if (encoding < 0)
-					{
-						printfPQExpBuffer(&conn->errorMessage,
-										  libpq_gettext("invalid encoding name in PGCLIENTENCODING: %s\n"),
-										  env);
-						goto error_return;
-					}
-					conn->client_encoding = encoding;
-				}
-
-			}
-
-		case SETENV_STATE_ENCODINGS_WAIT:
-			{
-				if (PQisBusy(conn))
-					return PGRES_POLLING_READING;
-
-				res = PQgetResult(conn);
-
-				if (res)
-				{
-					char	   *encoding;
-
-					if (PQresultStatus(res) != PGRES_TUPLES_OK)
-					{
-						PQclear(res);
-						goto error_return;
-					}
-
-					/* set client encoding in pg_conn struct */
-					encoding = PQgetvalue(res, 0, 0);
-					if (!encoding)		/* this should not happen */
-						conn->client_encoding = PG_SQL_ASCII;
-					else
-						conn->client_encoding = pg_char_to_encoding(encoding);
-					PQclear(res);
-
-					/*
-					 * We have to keep going in order to clear up the
-					 * query
-					 */
-					goto keep_going;
-				}
-
-				/* NULL result indicates that the query is finished */
-
-				/* Move on to setting the environment options */
-				conn->setenv_state = SETENV_STATE_OPTION_SEND;
-				goto keep_going;
-			}
-#endif
-
-		case SETENV_STATE_OPTION_SEND:
-			{
-				/* Send an Environment Option */
-				char		setQuery[100];		/* note length limits in
-												 * sprintf's below */
-
-				if (conn->next_eo->envName)
-				{
-					const char *val;
-
-					if ((val = getenv(conn->next_eo->envName)))
-					{
-						if (strcasecmp(val, "default") == 0)
-							sprintf(setQuery, "SET %s = %.60s",
-									conn->next_eo->pgName, val);
-						else
-							sprintf(setQuery, "SET %s = '%.60s'",
-									conn->next_eo->pgName, val);
-#ifdef CONNECTDEBUG
-						printf("Use environment variable %s to send %s\n",
-							   conn->next_eo->envName, setQuery);
-#endif
-						if (!PQsendQuery(conn, setQuery))
-							goto error_return;
-
-						conn->setenv_state = SETENV_STATE_OPTION_WAIT;
-					}
-					else
-						conn->next_eo++;
-				}
-				else
-				{
-					/* No more options to send, so we are done. */
-					conn->setenv_state = SETENV_STATE_IDLE;
-				}
-
-				goto keep_going;
-			}
-
-		case SETENV_STATE_OPTION_WAIT:
-			{
-				if (PQisBusy(conn))
-					return PGRES_POLLING_READING;
-
-				res = PQgetResult(conn);
-
-				if (res)
-				{
-					if (PQresultStatus(res) != PGRES_COMMAND_OK)
-					{
-						PQclear(res);
-						goto error_return;
-					}
-					/* Don't need the result */
-					PQclear(res);
-
-					/*
-					 * We have to keep going in order to clear up the
-					 * query
-					 */
-					goto keep_going;
-				}
-
-				/* NULL result indicates that the query is finished */
-
-				/* Send the next option */
-				conn->next_eo++;
-				conn->setenv_state = SETENV_STATE_OPTION_SEND;
-				goto keep_going;
-			}
-
-		case SETENV_STATE_IDLE:
-			return PGRES_POLLING_OK;
-
-		default:
-			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid state %c, "
-						   "probably indicative of memory corruption\n"),
-							  conn->setenv_state);
-			goto error_return;
-	}
-
-	/* Unreachable */
-
-error_return:
-	conn->setenv_state = SETENV_STATE_IDLE;
-	return PGRES_POLLING_FAILED;
-}
-
-
-#ifdef NOT_USED
-
-/*
- *		PQsetenv
- *
- * Passes the values of a standard set of environment variables to the
- * backend.
- *
- * Returns true on success, false on failure.
- *
- * This function used to be exported for no particularly good reason.
- * Since it's no longer used by libpq itself, let's try #ifdef'ing it out
- * and see if anyone complains.
- */
-static bool
-PQsetenv(PGconn *conn)
-{
-	PostgresPollingStatusType flag = PGRES_POLLING_WRITING;
-
-	if (!PQsetenvStart(conn))
-		return false;
-
-	for (;;)
-	{
-		/*
-		 * Wait, if necessary.	Note that the initial state (just after
-		 * PQsetenvStart) is to wait for the socket to select for writing.
-		 */
-		switch (flag)
-		{
-			case PGRES_POLLING_ACTIVE:
-				break;
-
-			case PGRES_POLLING_OK:
-				return true;	/* success! */
-
-			case PGRES_POLLING_READING:
-				if (pqWait(1, 0, conn))
-				{
-					conn->status = CONNECTION_BAD;
-					return false;
-				}
-				break;
-
-			case PGRES_POLLING_WRITING:
-				if (pqWait(0, 1, conn))
-				{
-					conn->status = CONNECTION_BAD;
-					return false;
-				}
-				break;
-
-			default:
-				/* Just in case we failed to set it in PQsetenvPoll */
-				conn->status = CONNECTION_BAD;
-				return false;
-		}
-
-		/*
-		 * Now try to advance the state machine.
-		 */
-		flag = PQsetenvPoll(conn);
-	}
-}
-#endif   /* NOT_USED */
-
-
-/*
- * makeEmptyPGconn
- *	 - create a PGconn data structure with (as yet) no interesting data
- */
-static PGconn *
-makeEmptyPGconn(void)
-{
-	PGconn	   *conn = (PGconn *) malloc(sizeof(PGconn));
-
-	if (conn == NULL)
-		return conn;
-
-	/* Zero all pointers and booleans */
-	MemSet((char *) conn, 0, sizeof(PGconn));
-
-	conn->noticeHook = defaultNoticeProcessor;
-	conn->status = CONNECTION_BAD;
-	conn->asyncStatus = PGASYNC_IDLE;
-	conn->setenv_state = SETENV_STATE_IDLE;
-	conn->notifyList = DLNewList();
-	conn->sock = -1;
-#ifdef USE_SSL
-	conn->allow_ssl_try = TRUE;
-#endif
-
-	/*
-	 * The output buffer size is set to 8K, which is the usual size of
-	 * pipe buffers on Unix systems.  That way, when we are sending a
-	 * large amount of data, we avoid incurring extra kernel context swaps
-	 * for partial bufferloads.  Note that we currently don't ever enlarge
-	 * the output buffer.
-	 *
-	 * With the same goal of minimizing context swaps, the input buffer will
-	 * be enlarged anytime it has less than 8K free, so we initially
-	 * allocate twice that.
-	 */
-	conn->inBufSize = 16 * 1024;
-	conn->inBuffer = (char *) malloc(conn->inBufSize);
-	conn->outBufSize = 8 * 1024;
-	conn->outBuffer = (char *) malloc(conn->outBufSize);
-	conn->nonblocking = FALSE;
-	initPQExpBuffer(&conn->errorMessage);
-	initPQExpBuffer(&conn->workBuffer);
-	if (conn->inBuffer == NULL ||
-		conn->outBuffer == NULL ||
-		conn->errorMessage.data == NULL ||
-		conn->workBuffer.data == NULL)
-	{
-		/* out of memory already :-( */
-		freePGconn(conn);
-		conn = NULL;
-	}
-	return conn;
-}
-
-/*
- * freePGconn
- *	 - free the PGconn data structure
- *
- */
-static void
-freePGconn(PGconn *conn)
-{
-	if (!conn)
-		return;
-	pqClearAsyncResult(conn);	/* deallocate result and curTuple */
-	if (conn->sock >= 0)
-	{
-		pqsecure_close(conn);
-#ifdef WIN32
-		closesocket(conn->sock);
-#else
-		close(conn->sock);
-#endif
-	}
-	if (conn->pghost)
-		free(conn->pghost);
-	if (conn->pghostaddr)
-		free(conn->pghostaddr);
-	if (conn->pgport)
-		free(conn->pgport);
-	if (conn->pgunixsocket)
-		free(conn->pgunixsocket);
-	if (conn->pgtty)
-		free(conn->pgtty);
-	if (conn->pgoptions)
-		free(conn->pgoptions);
-	if (conn->dbName)
-		free(conn->dbName);
-	if (conn->pguser)
-		free(conn->pguser);
-	if (conn->pgpass)
-		free(conn->pgpass);
-	/* Note that conn->Pfdebug is not ours to close or free */
-	if (conn->notifyList)
-		DLFreeList(conn->notifyList);
-	if (conn->lobjfuncs)
-		free(conn->lobjfuncs);
-	if (conn->inBuffer)
-		free(conn->inBuffer);
-	if (conn->outBuffer)
-		free(conn->outBuffer);
-	termPQExpBuffer(&conn->errorMessage);
-	termPQExpBuffer(&conn->workBuffer);
-	free(conn);
-}
-
-/*
-   closePGconn
-	 - properly close a connection to the backend
-*/
-static void
-closePGconn(PGconn *conn)
-{
-	/*
-	 * Note that the protocol doesn't allow us to send Terminate messages
-	 * during the startup phase.
-	 */
-	if (conn->sock >= 0 && conn->status == CONNECTION_OK)
-	{
-		/*
-		 * Try to send "close connection" message to backend. Ignore any
-		 * error. Note: this routine used to go to substantial lengths to
-		 * avoid getting SIGPIPE'd if the connection were already closed.
-		 * Now we rely on pqFlush to avoid the signal.
-		 */
-		pqPutc('X', conn);
-		pqFlush(conn);
-	}
-
-	/*
-	 * must reset the blocking status so a possible reconnect will work
-	 * don't call PQsetnonblocking() because it will fail if it's unable
-	 * to flush the connection.
-	 */
-	conn->nonblocking = FALSE;
-
-	/*
-	 * Close the connection, reset all transient state, flush I/O buffers.
-	 */
-	if (conn->sock >= 0)
-	{
-		pqsecure_close(conn);
-#ifdef WIN32
-		closesocket(conn->sock);
-#else
-		close(conn->sock);
-#endif
-	}
-	conn->sock = -1;
-	conn->status = CONNECTION_BAD;		/* Well, not really _bad_ - just
-										 * absent */
-	conn->asyncStatus = PGASYNC_IDLE;
-	pqClearAsyncResult(conn);	/* deallocate result and curTuple */
-	if (conn->lobjfuncs)
-		free(conn->lobjfuncs);
-	conn->lobjfuncs = NULL;
-	conn->inStart = conn->inCursor = conn->inEnd = 0;
-	conn->outCount = 0;
-	conn->nonblocking = FALSE;
-
-}
-
-/*
-   PQfinish:
-	  properly close a connection to the backend
-	  also frees the PGconn data structure so it shouldn't be re-used
-	  after this
-*/
-void
-PQfinish(PGconn *conn)
-{
-	if (conn)
-	{
-		closePGconn(conn);
-		freePGconn(conn);
-	}
-}
-
-/* PQreset :
-   resets the connection to the backend
-   closes the existing connection and makes a new one
-*/
-void
-PQreset(PGconn *conn)
-{
-	if (conn)
-	{
-		closePGconn(conn);
-
-		if (connectDBStart(conn))
-			(void) connectDBComplete(conn);
-	}
-}
-
-
-/* PQresetStart :
-   resets the connection to the backend
-   closes the existing connection and makes a new one
-   Returns 1 on success, 0 on failure.
-*/
-int
-PQresetStart(PGconn *conn)
-{
-	if (conn)
-	{
-		closePGconn(conn);
-
-		return connectDBStart(conn);
-	}
-
-	return 0;
-}
-
-
-/* PQresetPoll :
-   resets the connection to the backend
-   closes the existing connection and makes a new one
-*/
-
-PostgresPollingStatusType
-PQresetPoll(PGconn *conn)
-{
-	if (conn)
-		return PQconnectPoll(conn);
-
-	return PGRES_POLLING_FAILED;
-}
-
-
-/*
- * PQrequestCancel: attempt to request cancellation of the current operation.
- *
- * The return value is TRUE if the cancel request was successfully
- * dispatched, FALSE if not (in which case conn->errorMessage is set).
- * Note: successful dispatch is no guarantee that there will be any effect at
- * the backend.  The application must read the operation result as usual.
- *
- * XXX it was a bad idea to have the error message returned in
- * conn->errorMessage, since it could overwrite a message already there.
- * Would be better to return it in a char array passed by the caller.
- *
- * CAUTION: we want this routine to be safely callable from a signal handler
- * (for example, an application might want to call it in a SIGINT handler).
- * This means we cannot use any C library routine that might be non-reentrant.
- * malloc/free are often non-reentrant, and anything that might call them is
- * just as dangerous.  We avoid sprintf here for that reason.  Building up
- * error messages with strcpy/strcat is tedious but should be quite safe.
- * We also save/restore errno in case the signal handler support doesn't.
- *
- * NOTE: this routine must not generate any error message longer than
- * INITIAL_EXPBUFFER_SIZE (currently 256), since we dare not try to
- * expand conn->errorMessage!
- */
-
-int
-PQrequestCancel(PGconn *conn)
-{
-	int			save_errno = SOCK_ERRNO;
-	int			tmpsock = -1;
-	struct
-	{
-		uint32		packetlen;
-		CancelRequestPacket cp;
-	}			crp;
-
-	/* Check we have an open connection */
-	if (!conn)
-		return FALSE;
-
-	if (conn->sock < 0)
-	{
-		strcpy(conn->errorMessage.data,
-			   "PQrequestCancel() -- connection is not open\n");
-		conn->errorMessage.len = strlen(conn->errorMessage.data);
-#ifdef WIN32
-		WSASetLastError(save_errno);
-#else
-		errno = save_errno;
-#endif
-		return FALSE;
-	}
-
-	/*
-	 * We need to open a temporary connection to the postmaster. Use the
-	 * information saved by connectDB to do this with only kernel calls.
-	 */
-	if ((tmpsock = socket(conn->raddr.sa.sa_family, SOCK_STREAM, 0)) < 0)
-	{
-		strcpy(conn->errorMessage.data,
-			   "PQrequestCancel() -- socket() failed: ");
-		goto cancel_errReturn;
-	}
-retry3:
-	if (connect(tmpsock, &conn->raddr.sa, conn->raddr_len) < 0)
-	{
-		if (SOCK_ERRNO == EINTR)
-			/* Interrupted system call - we'll just try again */
-			goto retry3;
-		strcpy(conn->errorMessage.data,
-			   "PQrequestCancel() -- connect() failed: ");
-		goto cancel_errReturn;
-	}
-
-	/*
-	 * We needn't set nonblocking I/O or NODELAY options here.
-	 */
-
-	/* Create and send the cancel request packet. */
-
-	crp.packetlen = htonl((uint32) sizeof(crp));
-	crp.cp.cancelRequestCode = (MsgType) htonl(CANCEL_REQUEST_CODE);
-	crp.cp.backendPID = htonl(conn->be_pid);
-	crp.cp.cancelAuthCode = htonl(conn->be_key);
-
-retry4:
-	if (send(tmpsock, (char *) &crp, sizeof(crp), 0) != (int) sizeof(crp))
-	{
-		if (SOCK_ERRNO == EINTR)
-			/* Interrupted system call - we'll just try again */
-			goto retry4;
-		strcpy(conn->errorMessage.data,
-			   "PQrequestCancel() -- send() failed: ");
-		goto cancel_errReturn;
-	}
-
-	/* Sent it, done */
-#ifdef WIN32
-	closesocket(tmpsock);
-	WSASetLastError(save_errno);
-#else
-	close(tmpsock);
-	errno = save_errno;
-#endif
-
-	return TRUE;
-
-cancel_errReturn:
-	strcat(conn->errorMessage.data, SOCK_STRERROR(SOCK_ERRNO));
-	strcat(conn->errorMessage.data, "\n");
-	conn->errorMessage.len = strlen(conn->errorMessage.data);
-	if (tmpsock >= 0)
-	{
-#ifdef WIN32
-		closesocket(tmpsock);
-		WSASetLastError(save_errno);
-#else
-		close(tmpsock);
-		errno = save_errno;
-#endif
-	}
-	return FALSE;
-}
-
-
-/*
- * pqPacketSend() -- send a single-packet message.
- * this is like PacketSend(), defined in backend/libpq/pqpacket.c
- *
- * RETURNS: STATUS_ERROR if the write fails, STATUS_OK otherwise.
- * SIDE_EFFECTS: may block.
-*/
-int
-pqPacketSend(PGconn *conn, const char *buf, size_t len)
-{
-	/* Send the total packet size. */
-
-	if (pqPutInt(4 + len, 4, conn))
-		return STATUS_ERROR;
-
-	/* Send the packet itself. */
-
-	if (pqPutnchar(buf, len, conn))
-		return STATUS_ERROR;
-
-	if (pqFlush(conn))
-		return STATUS_ERROR;
-
-	return STATUS_OK;
-}
-
-
-
-#ifndef SYSCONFDIR
-#error "You must compile this file with SYSCONFDIR defined."
-#endif
-
-#define MAXBUFSIZE 256
-
-static int
-parseServiceInfo(PQconninfoOption *options, PQExpBuffer errorMessage)
-{
-	char	   *service = conninfo_getval(options, "service");
-	char	   *serviceFile = SYSCONFDIR "/pg_service.conf";
-	int			group_found = 0;
-	int			linenr = 0,
-				i;
-
-	if (service != NULL)
-	{
-		FILE	   *f;
-		char		buf[MAXBUFSIZE],
-				   *line;
-
-		f = fopen(serviceFile, "r");
-		if (f == NULL)
-		{
-			printfPQExpBuffer(errorMessage, "ERROR: Service file '%s' not found\n",
-							  serviceFile);
-			return 1;
-		}
-
-		/* As default, set the database name to the name of the service */
-		for (i = 0; options[i].keyword; i++)
-			if (strcmp(options[i].keyword, "dbname") == 0)
-			{
-				if (options[i].val != NULL)
-					free(options[i].val);
-				options[i].val = strdup(service);
-			}
-
-		while ((line = fgets(buf, MAXBUFSIZE - 1, f)) != NULL)
-		{
-			linenr++;
-
-			if (strlen(line) >= MAXBUFSIZE - 2)
-			{
-				fclose(f);
-				printfPQExpBuffer(errorMessage,
-						"ERROR: line %d too long in service file '%s'\n",
-								  linenr,
-								  serviceFile);
-				return 2;
-			}
-
-			/* ignore EOL at end of line */
-			if (strlen(line) && line[strlen(line) - 1] == '\n')
-				line[strlen(line) - 1] = 0;
-
-			/* ignore leading blanks */
-			while (*line && isspace((unsigned char) line[0]))
-				line++;
-
-			/* ignore comments and empty lines */
-			if (strlen(line) == 0 || line[0] == '#')
-				continue;
-
-			/* Check for right groupname */
-			if (line[0] == '[')
-			{
-				if (group_found)
-				{
-					/* group info already read */
-					fclose(f);
-					return 0;
-				}
-
-				if (strncmp(line + 1, service, strlen(service)) == 0 &&
-					line[strlen(service) + 1] == ']')
-					group_found = 1;
-				else
-					group_found = 0;
-			}
-			else
-			{
-				if (group_found)
-				{
-					/*
-					 * Finally, we are in the right group and can parse
-					 * the line
-					 */
-					char	   *key,
-							   *val;
-					int			found_keyword;
-
-					key = strtok(line, "=");
-					if (key == NULL)
-					{
-						printfPQExpBuffer(errorMessage,
-										  "ERROR: syntax error in service file '%s', line %d\n",
-										  serviceFile,
-										  linenr);
-						fclose(f);
-						return 3;
-					}
-					val = line + strlen(line) + 1;
-
-					found_keyword = 0;
-					for (i = 0; options[i].keyword; i++)
-					{
-						if (strcmp(options[i].keyword, key) == 0)
-						{
-							if (options[i].val != NULL)
-								free(options[i].val);
-							options[i].val = strdup(val);
-							found_keyword = 1;
-						}
-					}
-
-					if (!found_keyword)
-					{
-						printfPQExpBuffer(errorMessage,
-										  "ERROR: syntax error in service file '%s', line %d\n",
-										  serviceFile,
-										  linenr);
-						fclose(f);
-						return 3;
-					}
-				}
-			}
-		}
-
-		fclose(f);
-	}
-
-	return 0;
-}
-
-
-/*
- * Conninfo parser routine
- *
- * If successful, a malloc'd PQconninfoOption array is returned.
- * If not successful, NULL is returned and an error message is
- * left in errorMessage.
- */
-static PQconninfoOption *
-conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
-{
-	char	   *pname;
-	char	   *pval;
-	char	   *buf;
-	char	   *tmp;
-	char	   *cp;
-	char	   *cp2;
-	PQconninfoOption *options;
-	PQconninfoOption *option;
-	char		errortmp[INITIAL_EXPBUFFER_SIZE];
-
-	/* Make a working copy of PQconninfoOptions */
-	options = malloc(sizeof(PQconninfoOptions));
-	if (options == NULL)
-	{
-		printfPQExpBuffer(errorMessage,
-						  libpq_gettext("out of memory\n"));
-		return NULL;
-	}
-	memcpy(options, PQconninfoOptions, sizeof(PQconninfoOptions));
-
-	/* Need a modifiable copy of the input string */
-	if ((buf = strdup(conninfo)) == NULL)
-	{
-		printfPQExpBuffer(errorMessage,
-						  libpq_gettext("out of memory\n"));
-		PQconninfoFree(options);
-		return NULL;
-	}
-	cp = buf;
-
-	while (*cp)
-	{
-		/* Skip blanks before the parameter name */
-		if (isspace((unsigned char) *cp))
-		{
-			cp++;
-			continue;
-		}
-
-		/* Get the parameter name */
-		pname = cp;
-		while (*cp)
-		{
-			if (*cp == '=')
-				break;
-			if (isspace((unsigned char) *cp))
-			{
-				*cp++ = '\0';
-				while (*cp)
-				{
-					if (!isspace((unsigned char) *cp))
-						break;
-					cp++;
-				}
-				break;
-			}
-			cp++;
-		}
-
-		/* Check that there is a following '=' */
-		if (*cp != '=')
-		{
-			printfPQExpBuffer(errorMessage,
-							  libpq_gettext("missing \"=\" after \"%s\" in connection info string\n"),
-							  pname);
-			PQconninfoFree(options);
-			free(buf);
-			return NULL;
-		}
-		*cp++ = '\0';
-
-		/* Skip blanks after the '=' */
-		while (*cp)
-		{
-			if (!isspace((unsigned char) *cp))
-				break;
-			cp++;
-		}
-
-		/* Get the parameter value */
-		pval = cp;
-
-		if (*cp != '\'')
-		{
-			cp2 = pval;
-			while (*cp)
-			{
-				if (isspace((unsigned char) *cp))
-				{
-					*cp++ = '\0';
-					break;
-				}
-				if (*cp == '\\')
-				{
-					cp++;
-					if (*cp != '\0')
-						*cp2++ = *cp++;
-				}
-				else
-					*cp2++ = *cp++;
-			}
-			*cp2 = '\0';
-		}
-		else
-		{
-			cp2 = pval;
-			cp++;
-			for (;;)
-			{
-				if (*cp == '\0')
-				{
-					printfPQExpBuffer(errorMessage,
-									  libpq_gettext("unterminated quoted string in connection info string\n"));
-					PQconninfoFree(options);
-					free(buf);
-					return NULL;
-				}
-				if (*cp == '\\')
-				{
-					cp++;
-					if (*cp != '\0')
-						*cp2++ = *cp++;
-					continue;
-				}
-				if (*cp == '\'')
-				{
-					*cp2 = '\0';
-					cp++;
-					break;
-				}
-				*cp2++ = *cp++;
-			}
-		}
-
-		/*
-		 * Now we have the name and the value. Search for the param
-		 * record.
-		 */
-		for (option = options; option->keyword != NULL; option++)
-		{
-			if (strcmp(option->keyword, pname) == 0)
-				break;
-		}
-		if (option->keyword == NULL)
-		{
-			printfPQExpBuffer(errorMessage,
-					 libpq_gettext("invalid connection option \"%s\"\n"),
-							  pname);
-			PQconninfoFree(options);
-			free(buf);
-			return NULL;
-		}
-
-		/*
-		 * Store the value
-		 */
-		if (option->val)
-			free(option->val);
-		option->val = strdup(pval);
-
-	}
-
-	/* Now check for service info */
-	if (parseServiceInfo(options, errorMessage))
-	{
-		PQconninfoFree(options);
-		free(buf);
-		return NULL;
-	}
-
-	/* Done with the modifiable input string */
-	free(buf);
-
-	/*
-	 * Get the fallback resources for parameters not specified in the
-	 * conninfo string.
-	 */
-	for (option = options; option->keyword != NULL; option++)
-	{
-		if (option->val != NULL)
-			continue;			/* Value was in conninfo */
-
-		/*
-		 * Try to get the environment variable fallback
-		 */
-		if (option->envvar != NULL)
-		{
-			if ((tmp = getenv(option->envvar)) != NULL)
-			{
-				option->val = strdup(tmp);
-				continue;
-			}
-		}
-
-		/*
-		 * No environment variable specified or this one isn't set - try
-		 * compiled in
-		 */
-		if (option->compiled != NULL)
-		{
-			option->val = strdup(option->compiled);
-			continue;
-		}
-
-		/*
-		 * Special handling for user
-		 */
-		if (strcmp(option->keyword, "user") == 0)
-		{
-			option->val = fe_getauthname(errortmp);
-			/* note any error message is thrown away */
-			continue;
-		}
-
-		/*
-		 * Special handling for dbname
-		 */
-		if (strcmp(option->keyword, "dbname") == 0)
-		{
-			tmp = conninfo_getval(options, "user");
-			if (tmp)
-				option->val = strdup(tmp);
-			continue;
-		}
-	}
-
-	return options;
-}
-
-
-static char *
-conninfo_getval(PQconninfoOption *connOptions,
-				const char *keyword)
-{
-	PQconninfoOption *option;
-
-	for (option = connOptions; option->keyword != NULL; option++)
-	{
-		if (strcmp(option->keyword, keyword) == 0)
-			return option->val;
-	}
-
-	return NULL;
-}
-
-
-void
-PQconninfoFree(PQconninfoOption *connOptions)
-{
-	PQconninfoOption *option;
-
-	if (connOptions == NULL)
-		return;
-
-	for (option = connOptions; option->keyword != NULL; option++)
-	{
-		if (option->val != NULL)
-			free(option->val);
-	}
-	free(connOptions);
-}
-
-
-/* =========== accessor functions for PGconn ========= */
-char *
-PQdb(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->dbName;
-}
-
-char *
-PQuser(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pguser;
-}
-
-char *
-PQpass(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pgpass;
-}
-
-char *
-PQhost(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pghost ? conn->pghost : conn->pgunixsocket;
-}
-
-char *
-PQport(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pgport;
-}
-
-char *
-PQtty(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pgtty;
-}
-
-char *
-PQoptions(const PGconn *conn)
-{
-	if (!conn)
-		return (char *) NULL;
-	return conn->pgoptions;
-}
-
-ConnStatusType
-PQstatus(const PGconn *conn)
-{
-	if (!conn)
-		return CONNECTION_BAD;
-	return conn->status;
-}
-
-char *
-PQerrorMessage(const PGconn *conn)
-{
-	if (!conn)
-		return libpq_gettext("connection pointer is NULL\n");
-
-	return conn->errorMessage.data;
-}
-
-int
-PQsocket(const PGconn *conn)
-{
-	if (!conn)
-		return -1;
-	return conn->sock;
-}
-
-int
-PQbackendPID(const PGconn *conn)
-{
-	if (!conn || conn->status != CONNECTION_OK)
-		return 0;
-	return conn->be_pid;
-}
-
-int
-PQclientEncoding(const PGconn *conn)
-{
-	if (!conn || conn->status != CONNECTION_OK)
-		return -1;
-	return conn->client_encoding;
-}
-
-#ifdef MULTIBYTE
-int
-PQsetClientEncoding(PGconn *conn, const char *encoding)
-{
-	char		qbuf[128];
-	static char query[] = "set client_encoding to '%s'";
-	PGresult   *res;
-	int			status;
-
-	if (!conn || conn->status != CONNECTION_OK)
-		return -1;
-
-	if (!encoding)
-		return -1;
-
-	/* check query buffer overflow */
-	if (sizeof(qbuf) < (sizeof(query) + strlen(encoding)))
-		return -1;
-
-	/* ok, now send a query */
-	sprintf(qbuf, query, encoding);
-	res = PQexec(conn, qbuf);
-
-	if (res == (PGresult *) NULL)
-		return -1;
-	if (res->resultStatus != PGRES_COMMAND_OK)
-		status = -1;
-	else
-	{
-		/* change libpq internal encoding */
-		conn->client_encoding = pg_char_to_encoding(encoding);
-		status = 0;				/* everything is ok */
-	}
-	PQclear(res);
-	return (status);
-}
-
-#else							/* without multibytle support */
-
-int
-PQsetClientEncoding(PGconn *conn, const char *encoding)
-{
-	return -1;
-}
-#endif
-
-void
-PQtrace(PGconn *conn, FILE *debug_port)
-{
-	if (conn == NULL ||
-		conn->status == CONNECTION_BAD)
-		return;
-	PQuntrace(conn);
-	conn->Pfdebug = debug_port;
-}
-
-void
-PQuntrace(PGconn *conn)
-{
-	/* note: better allow untrace even when connection bad */
-	if (conn == NULL)
-		return;
-	if (conn->Pfdebug)
-	{
-		fflush(conn->Pfdebug);
-		conn->Pfdebug = NULL;
-	}
-}
-
-PQnoticeProcessor
-PQsetNoticeProcessor(PGconn *conn, PQnoticeProcessor proc, void *arg)
-{
-	PQnoticeProcessor old;
-
-	if (conn == NULL)
-		return NULL;
-
-	old = conn->noticeHook;
-	if (proc)
-	{
-		conn->noticeHook = proc;
-		conn->noticeArg = arg;
-	}
-	return old;
-}
-
-/*
- * The default notice/error message processor just prints the
- * message on stderr.  Applications can override this if they
- * want the messages to go elsewhere (a window, for example).
- * Note that simply discarding notices is probably a bad idea.
- */
-
-static void
-defaultNoticeProcessor(void *arg, const char *message)
-{
-	(void) arg;					/* not used */
-	/* Note: we expect the supplied string to end with a newline already. */
-	fprintf(stderr, "%s", message);
-}
-- 
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