2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)rmt.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.sbin/rmt/rmt.c,v 1.7 2000/02/12 01:14:33 mjacob Exp $
36 * $DragonFly: src/usr.sbin/rmt/rmt.c,v 1.5 2005/12/05 02:40:28 swildner Exp $
42 #include <sys/types.h>
43 #include <sys/socket.h>
60 char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE];
65 #define DEBUG(f) if (debug) fprintf(debug, f)
66 #define DEBUG1(f,a) if (debug) fprintf(debug, f, a)
67 #define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2)
69 char *checkbuf(char *, int);
71 void getstring(char *);
74 main(int argc, char **argv)
82 debug = fopen(*argv, "w");
85 setbuf(debug, (char *)0);
90 if (read(0, &c, 1) != 1)
99 DEBUG2("rmtd: O %s %s\n", device, mode);
101 * XXX the rmt protocol does not provide a means to
102 * specify the permission bits; allow rw for everyone,
103 * as modified by the users umask
105 tape = open(device, atoi(mode), 0666);
112 getstring(device); /* discard */
121 DEBUG2("rmtd: L %s %s\n", count, pos);
122 rval = lseek(tape, (off_t)atol(count), atoi(pos));
130 DEBUG1("rmtd: W %s\n", count);
131 record = checkbuf(record, n);
132 for (i = 0; i < n; i += cc) {
133 cc = read(0, &record[i], n - i);
135 DEBUG("rmtd: premature eof\n");
139 rval = write(tape, record, n);
146 DEBUG1("rmtd: R %s\n", count);
148 record = checkbuf(record, n);
149 rval = read(tape, record, n);
152 sprintf(resp, "A%d\n", rval);
153 write(1, resp, strlen(resp));
154 write(1, record, rval);
160 DEBUG2("rmtd: I %s %s\n", op, count);
162 mtop.mt_op = atoi(op);
163 mtop.mt_count = atoi(count);
164 if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0)
166 rval = mtop.mt_count;
170 case 'S': /* status */
172 { struct mtget mtget;
173 if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
175 rval = sizeof (mtget);
176 if (rval > 24) /* original mtget structure size */
178 sprintf(resp, "A%d\n", rval);
179 write(1, resp, strlen(resp));
180 write(1, (char *)&mtget, rval);
184 case 'V': /* version */
186 DEBUG1("rmtd: V %s\n", op);
191 DEBUG1("rmtd: garbage command %c\n", c);
195 DEBUG1("rmtd: A %d\n", rval);
196 sprintf(resp, "A%d\n", rval);
197 write(1, resp, strlen(resp));
210 for (i = 0; i < SSIZE; i++) {
211 if (read(0, cp+i, 1) != 1)
220 checkbuf(char *record, int size)
223 if (size <= maxrecsize)
227 record = malloc(size);
229 DEBUG("rmtd: cannot allocate buffer space\n");
233 while (size > 1024 &&
234 setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0)
243 DEBUG2("rmtd: E %d (%s)\n", num, strerror(num));
244 snprintf(resp, sizeof(resp), "E%d\n%s\n", num, strerror(num));
245 write(1, resp, strlen(resp));