From NetBSD:

Add remote tape capabilities.
Since we're setuid, let's be paranoid.
Picked up a little lint in the dryer.

3 files changed, 405 insertions, 0 deletions

diff --git a/bin/mt/mt.h b/bin/mt/mt.h
new file mode 100644
index 00000000000..bf61843cb9e
--- /dev/null
+++ b/bin/mt/mt.h
@@ -0,0 +1,52 @@
+/*	$OpenBSD: mt.h,v 1.1 1996/03/08 23:34:21 niklas Exp $	*/
+/*	$NetBSD: mt.h,v 1.1 1996/03/05 20:39:36 scottr Exp $	*/
+
+/*-
+ * Copyright (c) 1980, 1993
+ *	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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+/* rmt routines */
+void	rmtclose __P((void));
+int	rmthost __P((char *host));
+int	rmtopen __P((char *tape, int mode));
+int	rmtioctl __P((int command, int count));
+struct mtget *rmtstatus __P((void));
+
+void	interrupt __P((int signo));	/* in case operator bangs on console */
+
+/*
+ *	Exit status codes
+ */
+#define	X_FINOK		0	/* normal exit */
+#define	X_USAGE		1	/* invalid usage, no action performed */
+#define	X_REWRITE	2	/* restart writing from the check point */
+#define	X_ABORT		3	/* abort dump; don't attempt checkpointing */
diff --git a/bin/mt/mtrmt.c b/bin/mt/mtrmt.c
new file mode 100644
index 00000000000..928acb8affb
--- /dev/null
+++ b/bin/mt/mtrmt.c
@@ -0,0 +1,314 @@
+/*	$OpenBSD: mtrmt.c,v 1.1 1996/03/08 23:34:22 niklas Exp $	*/
+/*	$NetBSD: mtrmt.c,v 1.2 1996/03/06 06:22:07 scottr Exp $	*/
+
+/*-
+ * Copyright (c) 1980, 1993
+ *	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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+/*
+ * This was unceremoniously ripped out of usr.sbin/dump/dumprmt.c:
+ *
+ * static char sccsid[] = "@(#)dumprmt.c	8.1 (Berkeley) 6/5/93";
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/mtio.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#ifdef sunos
+#include <sys/vnode.h>
+
+#include <ufs/inode.h>
+#else
+#include <ufs/ufs/dinode.h>
+#endif
+
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+
+#include <protocols/dumprestore.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#endif
+
+#include "pathnames.h"
+#include "mt.h"
+
+#define	TS_CLOSED	0
+#define	TS_OPEN		1
+
+static	int rmtstate = TS_CLOSED;
+static	int rmtape;
+static	char *rmtpeer;
+
+extern	int uid;
+extern	int euid;
+
+static	int okname __P((char *));
+static	int rmtcall __P((char *, char *));
+static	void rmtconnaborted __P((/* int, int */));
+static	int rmtgetb __P((void));
+static	void rmtgetconn __P((void));
+static	void rmtgets __P((char *, int));
+static	int rmtreply __P((char *));
+
+int
+rmthost(host)
+	char *host;
+{
+
+	rmtpeer = malloc(strlen(host) + 1);
+	if (rmtpeer)
+		strcpy(rmtpeer, host);
+	else
+		rmtpeer = host;
+	signal(SIGPIPE, rmtconnaborted);
+	rmtgetconn();
+	if (rmtape < 0)
+		return (0);
+	return (1);
+}
+
+static void
+rmtconnaborted()
+{
+
+	errx(1, "Lost connection to remote host.");
+}
+
+void
+rmtgetconn()
+{
+	register char *cp;
+	static struct servent *sp = NULL;
+	static struct passwd *pwd = NULL;
+#ifdef notdef
+	static int on = 1;
+#endif
+	char *tuser;
+	int size;
+	int maxseg;
+
+	if (sp == NULL) {
+		sp = getservbyname("shell", "tcp");
+		if (sp == NULL)
+			errx(1, "shell/tcp: unknown service");
+		pwd = getpwuid(getuid());
+		if (pwd == NULL)
+			errx(1, "who are you?");
+	}
+	if ((cp = strchr(rmtpeer, '@')) != NULL) {
+		tuser = rmtpeer;
+		*cp = '\0';
+		if (!okname(tuser))
+			exit(1);
+		rmtpeer = ++cp;
+	} else
+		tuser = pwd->pw_name;
+
+	(void) seteuid(euid);
+	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser,
+	    _PATH_RMT, (int *)0);
+	(void) setuid(uid); /* Just to be Really Really Safe */
+
+	size = TP_BSIZE;
+	if (size > 60 * 1024)		/* XXX */
+		size = 60 * 1024;
+	/* Leave some space for rmt request/response protocol */
+	size += 2 * 1024;
+
+	while (size > TP_BSIZE &&
+	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
+		    size -= TP_BSIZE;
+	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
+
+	maxseg = 1024;
+	if (setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG,
+	    &maxseg, sizeof (maxseg)) < 0)
+		perror("TCP_MAXSEG setsockopt");
+
+#ifdef notdef
+	if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
+		perror("TCP_NODELAY setsockopt");
+#endif
+}
+
+static int
+okname(cp0)
+	char *cp0;
+{
+	register char *cp;
+	register int c;
+
+	for (cp = cp0; *cp; cp++) {
+		c = *cp;
+		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
+			warnx("invalid user name: %s", cp0);
+			return (0);
+		}
+	}
+	return (1);
+}
+
+int
+rmtopen(tape, mode)
+	char *tape;
+	int mode;
+{
+	char buf[256];
+
+	(void)sprintf(buf, "O%s\n%d\n", tape, mode);
+	rmtstate = TS_OPEN;
+	return (rmtcall(tape, buf));
+}
+
+void
+rmtclose()
+{
+
+	if (rmtstate != TS_OPEN)
+		return;
+	rmtcall("close", "C\n");
+	rmtstate = TS_CLOSED;
+}
+
+struct	mtget mts;
+
+struct mtget *
+rmtstatus()
+{
+	register int i;
+	register char *cp;
+
+	if (rmtstate != TS_OPEN)
+		return (NULL);
+	rmtcall("status", "S\n");
+	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
+		*cp++ = rmtgetb();
+	return (&mts);
+}
+
+int
+rmtioctl(cmd, count)
+	int cmd, count;
+{
+	char buf[256];
+
+	if (count < 0)
+		return (-1);
+	(void)sprintf(buf, "I%d\n%d\n", cmd, count);
+	return (rmtcall("ioctl", buf));
+}
+
+static int
+rmtcall(cmd, buf)
+	char *cmd, *buf;
+{
+
+	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
+		rmtconnaborted();
+	return (rmtreply(cmd));
+}
+
+static int
+rmtreply(cmd)
+	char *cmd;
+{
+	register char *cp;
+	char code[30], emsg[BUFSIZ];
+
+	rmtgets(code, sizeof (code));
+	if (*code == 'E' || *code == 'F') {
+		rmtgets(emsg, sizeof (emsg));
+		warnx("%s: %s", cmd, emsg);
+		if (*code == 'F') {
+			rmtstate = TS_CLOSED;
+			return (-1);
+		}
+		return (-1);
+	}
+	if (*code != 'A') {
+		/* Kill trailing newline */
+		cp = code + strlen(code);
+		if (cp > code && *--cp == '\n')
+			*cp = '\0';
+
+		warnx("Protocol to remote tape server botched (code \"%s\").\n",
+		    code);
+		rmtconnaborted();
+	}
+	return (atoi(code + 1));
+}
+
+int
+rmtgetb()
+{
+	char c;
+
+	if (read(rmtape, &c, 1) != 1)
+		rmtconnaborted();
+	return (c);
+}
+
+/* Get a line (guaranteed to have a trailing newline). */
+void
+rmtgets(line, len)
+	char *line;
+	int len;
+{
+	register char *cp = line;
+
+	while (len > 1) {
+		*cp = rmtgetb();
+		if (*cp == '\n') {
+			cp[1] = '\0';
+			return;
+		}
+		cp++;
+		len--;
+	}
+	*cp = '\0';
+	warnx("Protocol to remote tape server botched.\n");
+	warnx("(rmtgets got \"%s\").\n", line);
+	rmtconnaborted();
+}
diff --git a/bin/mt/pathnames.h b/bin/mt/pathnames.h
new file mode 100644
index 00000000000..9673d321e53
--- /dev/null
+++ b/bin/mt/pathnames.h
@@ -0,0 +1,39 @@
+/*	$OpenBSD: pathnames.h,v 1.1 1996/03/08 23:34:22 niklas Exp $	*/
+/*	$NetBSD: pathnames.h,v 1.1 1996/03/05 20:39:40 scottr Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#include <paths.h>
+
+#define	_PATH_RMT	"/etc/rmt"