NetBSD/sbin/dump/dumprmt.c

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/* $NetBSD: dumprmt.c,v 1.21 1998/07/30 18:14:00 thorpej Exp $ */
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/*-
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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 <sys/cdefs.h>
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#ifndef lint
#if 0
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static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: dumprmt.c,v 1.21 1998/07/30 18:14:00 thorpej Exp $");
#endif
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#endif /* not lint */
#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
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#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
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#include <protocols/dumprestore.h>
#include <ctype.h>
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#include <err.h>
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#include <errno.h>
#include <netdb.h>
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#include <pwd.h>
#include <signal.h>
#include <stdio.h>
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#ifdef __STDC__
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#endif
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#include "pathnames.h"
#include "dump.h"
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#define TS_CLOSED 0
#define TS_OPEN 1
static int rmtstate = TS_CLOSED;
static int rmtape;
static char *rmtpeer;
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static int okname __P((char *));
static int rmtcall __P((char *, char *));
void rmtclose __P((void));
static void rmtconnaborted __P((int));
static int rmtgetb __P((void));
static void rmtgetconn __P((void));
static void rmtgets __P((char *, int));
int rmthost __P((char *));
int rmtioctl __P((int, int));
int rmtopen __P((char *, int));
int rmtread __P((char *, int));
static int rmtreply __P((char *));
int rmtseek __P((int, int));
int rmtwrite __P((char *, int));
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extern int ntrec; /* blocking factor on tape */
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int
rmthost(host)
char *host;
{
rmtpeer = malloc(strlen(host) + 1);
if (rmtpeer)
strcpy(rmtpeer, host);
else
rmtpeer = host;
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signal(SIGPIPE, rmtconnaborted);
rmtgetconn();
if (rmtape < 0)
return (0);
return (1);
}
static void
rmtconnaborted(dummy)
int dummy;
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{
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errx(1, "Lost connection to remote host.");
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}
void
rmtgetconn()
{
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char *cp;
static struct servent *sp = NULL;
static struct passwd *pwd = NULL;
char *tuser, *name;
int size, opt;
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if (sp == NULL) {
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sp = getservbyname("shell", "tcp");
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if (sp == NULL)
errx(1, "shell/tcp: unknown service");
pwd = getpwuid(getuid());
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if (pwd == NULL)
errx(1, "who are you?");
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}
if ((name = strdup(pwd->pw_name)) == NULL)
err(1, "malloc");
if ((cp = strchr(rmtpeer, '@')) != NULL) {
tuser = rmtpeer;
*cp = '\0';
if (!okname(tuser))
exit(1);
rmtpeer = ++cp;
} else
tuser = name;
rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, name, tuser, _PATH_RMT,
(int *)0);
(void)free(name);
if (rmtape < 0)
return;
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size = ntrec * TP_BSIZE;
if (size > 60 * 1024) /* XXX */
size = 60 * 1024;
/* Leave some space for rmt request/response protocol */
size += 2 * 1024;
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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));
opt = IPTOS_THROUGHPUT;
(void)setsockopt(rmtape, IPPROTO_IP, IP_TOS, &opt, sizeof (opt));
opt = 1;
(void)setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof (opt));
}
static int
okname(cp0)
char *cp0;
{
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char *cp;
int c;
for (cp = cp0; *cp; cp++) {
c = *cp;
if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
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warnx("invalid user name: %s", cp0);
return (0);
}
}
return (1);
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}
int
rmtopen(tape, mode)
char *tape;
int mode;
{
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;
return (rmtcall(tape, buf));
}
void
rmtclose()
{
if (rmtstate != TS_OPEN)
return;
rmtcall("close", "C\n");
rmtstate = TS_CLOSED;
}
int
rmtread(buf, count)
char *buf;
int count;
{
char line[30];
int n, i, cc;
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(void)snprintf(line, sizeof line, "R%d\n", count);
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n = rmtcall("read", line);
if (n < 0) {
errno = n;
return (-1);
}
for (i = 0; i < n; i += cc) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0) {
rmtconnaborted(0);
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}
}
return (n);
}
int
rmtwrite(buf, count)
char *buf;
int count;
{
char line[30];
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(void)snprintf(line, sizeof line, "W%d\n", count);
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write(rmtape, line, strlen(line));
write(rmtape, buf, count);
return (rmtreply("write"));
}
#if 0 /* XXX unused? */
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void
rmtwrite0(count)
int count;
{
char line[30];
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(void)snprintf(line, sizeof line, "W%d\n", count);
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write(rmtape, line, strlen(line));
}
void
rmtwrite1(buf, count)
char *buf;
int count;
{
write(rmtape, buf, count);
}
int
rmtwrite2()
{
return (rmtreply("write"));
}
#endif
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int
rmtseek(offset, pos)
int offset, pos;
{
char line[80];
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(void)snprintf(line, sizeof line, "L%d\n%d\n", offset, pos);
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return (rmtcall("seek", line));
}
#if 0 /* XXX unused? */
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struct mtget *
rmtstatus()
{
struct mtget mts;
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int i;
char *cp;
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if (rmtstate != TS_OPEN)
return (NULL);
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rmtcall("status", "S\n");
for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
*cp++ = rmtgetb();
return (&mts);
}
#endif
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int
rmtioctl(cmd, count)
int cmd, count;
{
char buf[256];
if (count < 0)
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));
}
static int
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rmtcall(cmd, buf)
char *cmd, *buf;
{
if (write(rmtape, buf, strlen(buf)) != strlen(buf))
rmtconnaborted(0);
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return (rmtreply(cmd));
}
static int
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rmtreply(cmd)
char *cmd;
{
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char *cp;
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char code[30], emsg[BUFSIZ];
rmtgets(code, sizeof (code));
if (*code == 'E' || *code == 'F') {
rmtgets(emsg, sizeof (emsg));
msg("%s: %s", cmd, emsg);
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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';
msg("Protocol to remote tape server botched (code \"%s\").\n",
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code);
rmtconnaborted(0);
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}
return (atoi(code + 1));
}
int
rmtgetb()
{
char c;
if (read(rmtape, &c, 1) != 1)
rmtconnaborted(0);
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return (c);
}
/* Get a line (guaranteed to have a trailing newline). */
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void
rmtgets(line, len)
char *line;
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int len;
{
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char *cp = line;
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while (len > 1) {
*cp = rmtgetb();
if (*cp == '\n') {
cp[1] = '\0';
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return;
}
cp++;
len--;
}
*cp = '\0';
msg("Protocol to remote tape server botched.\n");
msg("(rmtgets got \"%s\").\n", line);
rmtconnaborted(0);
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}