GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/mt/mtrmt.c Lines: 0 95 0.0 %
Date: 2017-11-13 Branches: 0 54 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mtrmt.c,v 1.21 2013/11/21 15:54:45 deraadt Exp $	*/
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/*	$NetBSD: mtrmt.c,v 1.2 1996/03/06 06:22:07 scottr Exp $	*/
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/*-
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 * Copyright (c) 1980, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <sys/mtio.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <ufs/ufs/dinode.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <protocols/dumprestore.h>
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#include <ctype.h>
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#include <err.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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#include "mt.h"
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#define	TS_CLOSED	0
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#define	TS_OPEN		1
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static	int rmtstate = TS_CLOSED;
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static	int rmtape;
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static	char *rmtpeer;
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static	int okname(char *);
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static	int rmtcall(char *, char *);
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static	void rmtconnaborted(void);
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static	void sigrmtconnaborted(int);
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static	int rmtgetb(void);
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static	void rmtgetconn(void);
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static	void rmtgets(char *, int);
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static	int rmtreply(char *);
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int
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rmthost(char *host)
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{
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	if ((rmtpeer = strdup(host)) == NULL)
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		err(1, "strdup");
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	signal(SIGPIPE, sigrmtconnaborted);
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	rmtgetconn();
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	if (rmtape < 0)
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		return (0);
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	return (1);
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}
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/* ARGSUSED */
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static void
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sigrmtconnaborted(int signo)
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{
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	warnx("Lost connection to remote host.");
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	_exit(1);
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}
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static void
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rmtconnaborted(void)
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{
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	errx(1, "Lost connection to remote host.");
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}
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void
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rmtgetconn(void)
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{
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	char *cp;
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	static struct servent *sp = NULL;
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	static struct passwd *pwd = NULL;
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#ifdef notdef
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	static int on = 1;
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#endif
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	char *tuser;
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	int size;
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	int maxseg;
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	if (sp == NULL) {
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		sp = getservbyname("shell", "tcp");
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		if (sp == NULL)
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			errx(1, "shell/tcp: unknown service");
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		pwd = getpwuid(getuid());
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		if (pwd == NULL)
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			errx(1, "who are you?");
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	}
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	if ((cp = strchr(rmtpeer, '@')) != NULL) {
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		tuser = rmtpeer;
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		*cp = '\0';
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		if (!okname(tuser))
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			exit(1);
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		rmtpeer = ++cp;
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	} else
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		tuser = pwd->pw_name;
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	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser,
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	    _PATH_RMT, NULL);
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	if (rmtape == -1)
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		exit(1);		/* rcmd already printed error message */
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	size = TP_BSIZE;
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	if (size > 60 * 1024)		/* XXX */
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		size = 60 * 1024;
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	/* Leave some space for rmt request/response protocol */
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	size += 2 * 1024;
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	while (size > TP_BSIZE &&
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	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
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		    size -= TP_BSIZE;
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	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
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	maxseg = 1024;
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	(void)setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG, &maxseg,
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		sizeof (maxseg));
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#ifdef notdef
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	if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
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		perror("TCP_NODELAY setsockopt");
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#endif
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}
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static int
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okname(char *cp0)
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{
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	unsigned char *cp;
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	int c;
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	for (cp = cp0; *cp; cp++) {
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		c = (unsigned char)*cp;
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		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
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			warnx("invalid user name: %s", cp0);
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			return (0);
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		}
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	}
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	return (1);
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}
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int
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rmtopen(char *tape, int mode)
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{
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	char buf[256];
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	(void)snprintf(buf, sizeof (buf), "O%s\n%d\n", tape, mode);
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	rmtstate = TS_OPEN;
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	return (rmtcall(tape, buf));
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}
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void
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rmtclose(void)
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{
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	if (rmtstate != TS_OPEN)
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		return;
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	rmtcall("close", "C\n");
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	rmtstate = TS_CLOSED;
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}
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struct	mtget mts;
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struct mtget *
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rmtstatus(void)
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{
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	int i;
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	char *cp;
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	if (rmtstate != TS_OPEN)
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		return (NULL);
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	rmtcall("status", "S\n");
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	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
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		*cp++ = rmtgetb();
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	return (&mts);
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}
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int
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rmtioctl(int cmd, int count)
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{
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	char buf[256];
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	if (count < 0)
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		return (-1);
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	(void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count);
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	return (rmtcall("ioctl", buf));
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}
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static int
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rmtcall(char *cmd, char *buf)
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{
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	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
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		rmtconnaborted();
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	return (rmtreply(cmd));
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}
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static int
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rmtreply(char *cmd)
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{
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	char *cp;
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	char code[30], emsg[BUFSIZ];
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	rmtgets(code, sizeof (code));
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	if (*code == 'E' || *code == 'F') {
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		rmtgets(emsg, sizeof (emsg));
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		warnx("%s: %s", cmd, emsg);
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		if (*code == 'F') {
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			rmtstate = TS_CLOSED;
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			return (-1);
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		}
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		return (-1);
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	}
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	if (*code != 'A') {
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		/* Kill trailing newline */
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		cp = code + strlen(code);
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		if (cp > code && *--cp == '\n')
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			*cp = '\0';
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		warnx("Protocol to remote tape server botched (code \"%s\").",
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		    code);
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		rmtconnaborted();
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	}
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	return (atoi(code + 1));
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}
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int
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rmtgetb(void)
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{
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	char c;
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	if (read(rmtape, &c, 1) != 1)
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		rmtconnaborted();
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	return (c);
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}
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/* Get a line (guaranteed to have a trailing newline). */
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void
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rmtgets(char *line, int len)
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{
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	char *cp = line;
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	while (len > 1) {
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		*cp = rmtgetb();
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		if (*cp == '\n') {
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			cp[1] = '\0';
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			return;
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		}
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		cp++;
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		len--;
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	}
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	*cp = '\0';
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	warnx("Protocol to remote tape server botched.");
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	warnx("(rmtgets got \"%s\").", line);
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	rmtconnaborted();
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}