NetBSD/sbin/dump/dumprmt.c

306 lines
5.9 KiB
C

/*-
* Copyright (c) 1980 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.
*/
#ifndef lint
/*static char sccsid[] = "from: @(#)dumprmt.c 5.11 (Berkeley) 3/7/91";*/
static char rcsid[] = "$Id: dumprmt.c,v 1.4 1993/08/01 18:27:44 mycroft Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mtio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <ufs/dinode.h>
#include <signal.h>
#include <netinet/in.h>
#include <netdb.h>
#include <protocols/dumprestore.h>
#include <pwd.h>
#include <stdio.h>
#ifdef __STDC__
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "pathnames.h"
#define TS_CLOSED 0
#define TS_OPEN 1
static int rmtstate = TS_CLOSED;
int rmtape;
void rmtgetconn();
void rmtconnaborted();
int rmtreply();
int rmtgetb();
void rmtgets();
int rmtcall();
char *rmtpeer;
extern int ntrec; /* blocking factor on tape */
extern void msg();
int
rmthost(host)
char *host;
{
rmtpeer = host;
signal(SIGPIPE, rmtconnaborted);
rmtgetconn();
if (rmtape < 0)
return (0);
return (1);
}
void
rmtconnaborted()
{
fprintf(stderr, "rdump: Lost connection to remote host.\n");
exit(1);
}
void
rmtgetconn()
{
static struct servent *sp = 0;
struct passwd *pw;
char *name = "root";
int size;
if (sp == 0) {
sp = getservbyname("shell", "tcp");
if (sp == 0) {
fprintf(stderr, "rdump: shell/tcp: unknown service\n");
exit(1);
}
}
pw = getpwuid(getuid());
if (pw && pw->pw_name)
name = pw->pw_name;
rmtape = rcmd(&rmtpeer, sp->s_port, name, name, _PATH_RMT, 0);
size = ntrec * TP_BSIZE;
while (size > TP_BSIZE &&
setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
size -= TP_BSIZE;
}
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;
}
int
rmtread(buf, count)
char *buf;
int count;
{
char line[30];
int n, i, cc;
extern errno;
(void)sprintf(line, "R%d\n", count);
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();
}
}
return (n);
}
int
rmtwrite(buf, count)
char *buf;
int count;
{
char line[30];
(void)sprintf(line, "W%d\n", count);
write(rmtape, line, strlen(line));
write(rmtape, buf, count);
return (rmtreply("write"));
}
void
rmtwrite0(count)
int count;
{
char line[30];
(void)sprintf(line, "W%d\n", count);
write(rmtape, line, strlen(line));
}
void
rmtwrite1(buf, count)
char *buf;
int count;
{
write(rmtape, buf, count);
}
int
rmtwrite2()
{
return (rmtreply("write"));
}
int
rmtseek(offset, pos)
int offset, pos;
{
char line[80];
(void)sprintf(line, "L%d\n%d\n", offset, pos);
return (rmtcall("seek", line));
}
struct mtget mts;
struct mtget *
rmtstatus()
{
register int i;
register char *cp;
if (rmtstate != TS_OPEN)
return (0);
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));
}
int
rmtcall(cmd, buf)
char *cmd, *buf;
{
if (write(rmtape, buf, strlen(buf)) != strlen(buf))
rmtconnaborted();
return (rmtreply(cmd));
}
int
rmtreply(cmd)
char *cmd;
{
char code[30], emsg[BUFSIZ];
rmtgets(code, sizeof (code));
if (*code == 'E' || *code == 'F') {
rmtgets(emsg, sizeof (emsg));
msg("%s: %s\n", cmd, emsg, code + 1);
if (*code == 'F') {
rmtstate = TS_CLOSED;
return (-1);
}
return (-1);
}
if (*code != 'A') {
msg("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);
}
void
rmtgets(cp, len)
char *cp;
int len;
{
while (len > 1) {
*cp = rmtgetb();
if (*cp == '\n') {
cp[1] = 0;
return;
}
cp++;
len--;
}
msg("Protocol to remote tape server botched (in rmtgets).\n");
rmtconnaborted();
}