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Use non-blocking connect() with ppoll() and timeout instead of alarm().
For hosts with multiple IP addrs this makes it possible to fall
over from an unresponsive IP to another.  This also replaces the
other connect(2) + connect_wait() calls with timed_connect() so the
-w option now works for more that just http.  OK sthen@ deraadt@

/*	$OpenBSD: extern.h,v 1.53 2022/09/15 12:47:10 millert Exp $	*/
/*	$NetBSD: extern.h,v 1.17 1997/08/18 10:20:19 lukem Exp $	*/

/*
 * Copyright (C) 1997 and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*-
 * Copyright (c) 1994 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)extern.h	8.3 (Berkeley) 10/9/94
 */

#include <sys/types.h>
#include <sys/socket.h>

void	abort_remote(FILE *);
void	abortpt(int);
void	abortrecv(int);
void	alarmtimer(int);
int	another(int *, char ***, const char *);
int	auto_fetch(int, char **, char *);
void	blkfree(char **);
void	cdup(int, char **);
void	cmdabort(int);
void	cmdscanner(int);
int	command(const char *, ...);
int	confirm(const char *, const char *);
FILE   *dataconn(const char *);
int	foregroundproc(void);
int	fileindir(const char *, const char *);
struct cmd *getcmd(const char *);
int	getreply(int);
int	globulize(char **);
char   *gunique(const char *);
void	help(int, char **);
char   *hookup(char *, char *);
int	initconn(void);
void	intr(void);
int	isurl(const char *);
int	ftp_login(const char *, char *, char *);
void	lostpeer(void);
void	makeargv(void);
void	progressmeter(int, const char *);
char   *prompt(void);
void	proxtrans(const char *, const char *, const char *);
void	psabort(int);
void	psummary(int);
void	pswitch(int);
void	ptransfer(int);
void	recvrequest(const char *, const char *, const char *,
	    const char *, int, int);
char   *remglob(char **, int, char **);
off_t	remotesize(const char *, int);
time_t	remotemodtime(const char *, int);
void	reset(int, char **);
void	rmthelp(int, char **);
void	sethash(int, char **);
void	setpeer(int, char **);
void	setttywidth(int);
char   *slurpstring(void);
int	timed_connect(int s, const struct sockaddr *, socklen_t, int);

__dead void	usage(void);

void	cookie_get(const char *, const char *, int, char **);
void	cookie_load(void);

#ifndef SMALL
void	abortsend(int);
unsigned char complete(EditLine *, int);
void	controlediting(void);
void	domacro(int, char **);
void	list_vertical(StringList *);
void	parse_list(char **, char *);
char   *remglob2(char **, int, char **, FILE **ftemp, char *type);
int	ruserpass(const char *, char **, char **, char **);
void	sendrequest(const char *, const char *, const char *, int);
ssize_t http_time(time_t, char *, size_t);
#endif /* !SMALL */

extern jmp_buf	abortprox;
extern int	abrtflag;
extern FILE    *cout;
extern int	data;
extern char    *home;
extern jmp_buf	jabort;
extern int	family;
extern int	proxy;
extern char	reply_string[];
extern off_t	restart_point;
extern int	keep_alive_timeout;
extern int	connect_timeout;
extern int	pipeout;
extern char	*action;

#ifndef SMALL
extern int	NCMDS;
extern int	server_timestamps;
#endif /* !SMALL */

extern char *__progname;		/* from crt0.o */