2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
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34 static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
36 static const char rcsid[] =
40 #include <sys/param.h>
42 #include <sys/socket.h>
45 #include <ufs/ufs/dinode.h>
47 #include <netinet/in.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
50 #include <netinet/tcp.h>
52 #include <protocols/dumprestore.h>
64 #include "pathnames.h"
70 static int rmtstate = TS_CLOSED;
74 static int okname(const char *);
75 static int rmtcall(const char *, const char *);
76 static void rmtconnaborted(int);
77 static int rmtgetb(void);
78 static void rmtgetconn(void);
79 static void rmtgets(char *, int);
80 static int rmtreply(const char *);
82 static int errfd = -1;
83 extern int ntrec; /* blocking factor on tape */
86 rmthost(const char *host)
89 rmtpeer = strdup(host);
92 signal(SIGPIPE, rmtconnaborted);
100 rmtconnaborted(int sig __unused)
102 msg("Lost connection to remote host.\n");
111 if (select(errfd + 1, &r, NULL, NULL, &t)) {
115 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) {
117 msg("on %s: %s%s", rmtpeer, buf,
118 buf[i - 1] == '\n' ? "" : "\n");
131 static struct servent *sp = NULL;
132 static struct passwd *pwd = NULL;
139 sp = getservbyname("shell", "tcp");
141 msg("shell/tcp: unknown service\n");
144 pwd = getpwuid(getuid());
146 msg("who are you?\n");
150 if ((cp = strchr(rmtpeer, '@')) != NULL) {
157 tuser = pwd->pw_name;
158 if ((rmt = getenv("RMT")) == NULL)
161 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name,
164 msg("login to %s as %s failed.\n", rmtpeer, tuser);
167 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer);
168 size = ntrec * TP_BSIZE;
169 if (size > 60 * 1024) /* XXX */
171 /* Leave some space for rmt request/response protocol */
173 while (size > TP_BSIZE &&
174 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
176 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
177 throughput = IPTOS_THROUGHPUT;
178 if (setsockopt(rmtape, IPPROTO_IP, IP_TOS,
179 &throughput, sizeof(throughput)) < 0)
180 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
182 if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
183 perror("TCP_NODELAY setsockopt");
187 okname(const char *cp0)
192 for (cp = cp0; *cp; cp++) {
194 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
195 msg("invalid user name %s\n", cp0);
203 rmtopen(const char *tape, int mode)
207 (void)snprintf(buf, sizeof (buf), "O%.226s\n%d\n", tape, mode);
209 return (rmtcall(tape, buf));
216 if (rmtstate != TS_OPEN)
218 rmtcall("close", "C\n");
219 rmtstate = TS_CLOSED;
223 rmtread(char *buf, int count)
228 (void)snprintf(line, sizeof (line), "R%d\n", count);
229 n = rmtcall("read", line);
231 /* rmtcall() properly sets errno for us on errors. */
233 for (i = 0; i < n; i += cc) {
234 cc = read(rmtape, buf+i, n - i);
242 rmtwrite(const char *buf, int count)
246 (void)snprintf(line, sizeof (line), "W%d\n", count);
247 write(rmtape, line, strlen(line));
248 write(rmtape, buf, count);
249 return (rmtreply("write"));
257 (void)snprintf(line, sizeof (line), "W%d\n", count);
258 write(rmtape, line, strlen(line));
262 rmtwrite1(const char *buf, int count)
265 write(rmtape, buf, count);
272 return (rmtreply("write"));
276 rmtseek(int offset, int pos) /* XXX off_t ? */
280 (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos);
281 return (rmtcall("seek", line));
292 if (rmtstate != TS_OPEN)
294 rmtcall("status", "S\n");
295 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
301 rmtioctl(int cmd, int count)
307 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count);
308 return (rmtcall("ioctl", buf));
312 rmtcall(const char *cmd, const char *buf)
315 if (write(rmtape, buf, strlen(buf)) != strlen(buf))
317 return (rmtreply(cmd));
321 rmtreply(const char *cmd)
324 char code[30], emsg[BUFSIZ];
326 rmtgets(code, sizeof (code));
327 if (*code == 'E' || *code == 'F') {
328 rmtgets(emsg, sizeof (emsg));
329 msg("%s: %s", cmd, emsg);
330 errno = atoi(code + 1);
332 rmtstate = TS_CLOSED;
336 /* Kill trailing newline */
337 cp = code + strlen(code);
338 if (cp > code && *--cp == '\n')
341 msg("Protocol to remote tape server botched (code \"%s\").\n",
345 return (atoi(code + 1));
353 if (read(rmtape, &c, 1) != 1)
358 /* Get a line (guaranteed to have a trailing newline). */
360 rmtgets(char *line, int len)
374 msg("Protocol to remote tape server botched.\n");
375 msg("(rmtgets got \"%s\").\n", line);