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8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
378 lines
7.8 KiB
C
378 lines
7.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mtio.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/in_systm.h>
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#include <netinet/ip.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 <netdb.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <limits.h>
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#include <errno.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 "dump.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(const char *);
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static int rmtcall(const char *, const char *);
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static void rmtconnaborted(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(const char *);
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static int errfd = -1;
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extern int ntrec; /* blocking factor on tape */
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int
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rmthost(const char *host)
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{
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rmtpeer = strdup(host);
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if (rmtpeer == NULL)
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return (0);
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signal(SIGPIPE, rmtconnaborted);
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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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static void
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rmtconnaborted(int sig __unused)
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{
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msg("Lost connection to remote host.\n");
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if (errfd != -1) {
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fd_set r;
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struct timeval t;
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FD_ZERO(&r);
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FD_SET(errfd, &r);
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t.tv_sec = 0;
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t.tv_usec = 0;
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if (select(errfd + 1, &r, NULL, NULL, &t)) {
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int i;
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char buf[2048];
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if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) {
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buf[i] = '\0';
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msg("on %s: %s%s", rmtpeer, buf,
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buf[i - 1] == '\n' ? "" : "\n");
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}
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}
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}
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exit(X_ABORT);
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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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const char *rmt;
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static struct servent *sp = NULL;
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static struct passwd *pwd = NULL;
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char *tuser;
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int size;
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int throughput;
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int on;
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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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msg("shell/tcp: unknown service\n");
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exit(X_STARTUP);
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}
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pwd = getpwuid(getuid());
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if (pwd == NULL) {
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msg("who are you?\n");
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exit(X_STARTUP);
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}
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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(X_STARTUP);
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rmtpeer = ++cp;
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} else
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tuser = pwd->pw_name;
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if ((rmt = getenv("RMT")) == NULL)
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rmt = _PATH_RMT;
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msg("%s", "");
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rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name,
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tuser, rmt, &errfd);
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if (rmtape < 0) {
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msg("login to %s as %s failed.\n", rmtpeer, tuser);
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return;
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}
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(void)fprintf(stderr, "Connection to %s established.\n", rmtpeer);
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size = ntrec * 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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throughput = IPTOS_THROUGHPUT;
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if (setsockopt(rmtape, IPPROTO_IP, IP_TOS,
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&throughput, sizeof(throughput)) < 0)
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perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
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on = 1;
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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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}
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static int
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okname(const char *cp0)
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{
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const char *cp;
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int c;
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for (cp = cp0; *cp; cp++) {
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c = *cp;
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if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
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msg("invalid user name %s\n", 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(const 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%.226s\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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int
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rmtread(char *buf, int count)
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{
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char line[30];
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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);
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if (n < 0)
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/* rmtcall() properly sets errno for us on errors. */
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return (n);
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for (i = 0; i < n; i += cc) {
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cc = read(rmtape, buf+i, n - i);
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if (cc <= 0)
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rmtconnaborted(0);
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}
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return (n);
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}
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int
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rmtwrite(const char *buf, int count)
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{
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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));
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write(rmtape, buf, count);
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return (rmtreply("write"));
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}
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void
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rmtwrite0(int count)
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{
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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));
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}
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void
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rmtwrite1(const char *buf, int count)
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{
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write(rmtape, buf, count);
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}
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int
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rmtwrite2(void)
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{
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return (rmtreply("write"));
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}
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int
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rmtseek(int offset, int pos) /* XXX off_t ? */
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{
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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));
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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(const char *cmd, const char *buf)
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{
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if (write(rmtape, buf, strlen(buf)) != strlen(buf))
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rmtconnaborted(0);
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return (rmtreply(cmd));
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}
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static int
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rmtreply(const 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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msg("%s: %s", cmd, emsg);
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errno = atoi(code + 1);
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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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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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msg("Protocol to remote tape server botched (code \"%s\").\n",
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code);
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rmtconnaborted(0);
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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(0);
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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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msg("Protocol to remote tape server botched.\n");
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msg("(rmtgets got \"%s\").\n", line);
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rmtconnaborted(0);
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}
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