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dumprmt.c revision 1.5 
      1 /*-
      2  * Copyright (c) 1980 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      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.
     20  *
     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
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /* from: static char sccsid[] = "@(#)dumprmt.c	5.15 (Berkeley) 6/18/92"; */
     36 static char *rcsid = "$Id: dumprmt.c,v 1.5 1993/12/22 10:24:42 cgd Exp $";
     37 #endif /* not lint */
     38 
     39 #ifdef sunos
     40 #include <stdio.h>
     41 #include <ctype.h>
     42 #include <sys/param.h>
     43 #include <sys/mtio.h>
     44 #include <sys/ioctl.h>
     45 #include <sys/socket.h>
     46 #include <sys/stat.h>
     47 #else
     48 #include <sys/param.h>
     49 #include <sys/mtio.h>
     50 #include <sys/ioctl.h>
     51 #include <sys/socket.h>
     52 #include <sys/time.h>
     53 #include <stdio.h>
     54 #endif
     55 #include <ufs/dinode.h>
     56 #include <signal.h>
     57 
     58 #include <netinet/in.h>
     59 
     60 #include <netdb.h>
     61 #include <protocols/dumprestore.h>
     62 #include <pwd.h>
     63 #ifdef __STDC__
     64 #include <unistd.h>
     65 #include <stdlib.h>
     66 #include <string.h>
     67 #endif
     68 #include "pathnames.h"
     69 
     70 #define	TS_CLOSED	0
     71 #define	TS_OPEN		1
     72 
     73 static	int rmtstate = TS_CLOSED;
     74 int	rmtape;
     75 void	rmtgetconn();
     76 void	rmtconnaborted();
     77 int	rmtreply();
     78 int	rmtgetb();
     79 void	rmtgets();
     80 int	rmtcall();
     81 char	*rmtpeer;
     82 
     83 extern int ntrec;		/* blocking factor on tape */
     84 extern void msg();
     85 
     86 extern void exit();
     87 
     88 int
     89 rmthost(host)
     90 	char *host;
     91 {
     92 
     93 	rmtpeer = host;
     94 	signal(SIGPIPE, rmtconnaborted);
     95 	rmtgetconn();
     96 	if (rmtape < 0)
     97 		return (0);
     98 	return (1);
     99 }
    100 
    101 void
    102 rmtconnaborted()
    103 {
    104 
    105 	(void) fprintf(stderr, "rdump: Lost connection to remote host.\n");
    106 	(void) exit(1);
    107 }
    108 
    109 void
    110 rmtgetconn()
    111 {
    112 	static struct servent *sp = 0;
    113 	struct passwd *pw;
    114 	char *name = "root";
    115 	int size;
    116 
    117 	if (sp == 0) {
    118 		sp = getservbyname("shell", "tcp");
    119 		if (sp == 0) {
    120 			(void) fprintf(stderr,
    121 			    "rdump: shell/tcp: unknown service\n");
    122 			(void) exit(1);
    123 		}
    124 	}
    125 	pw = getpwuid(getuid());
    126 	if (pw && pw->pw_name)
    127 		name = pw->pw_name;
    128 	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, name, name, _PATH_RMT,
    129 	    (int *)0);
    130 	size = ntrec * TP_BSIZE;
    131 	while (size > TP_BSIZE &&
    132 	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
    133 		size -= TP_BSIZE;
    134 }
    135 
    136 int
    137 rmtopen(tape, mode)
    138 	char *tape;
    139 	int mode;
    140 {
    141 	char buf[256];
    142 
    143 	(void)sprintf(buf, "O%s\n%d\n", tape, mode);
    144 	rmtstate = TS_OPEN;
    145 	return (rmtcall(tape, buf));
    146 }
    147 
    148 void
    149 rmtclose()
    150 {
    151 
    152 	if (rmtstate != TS_OPEN)
    153 		return;
    154 	rmtcall("close", "C\n");
    155 	rmtstate = TS_CLOSED;
    156 }
    157 
    158 int
    159 rmtread(buf, count)
    160 	char *buf;
    161 	int count;
    162 {
    163 	char line[30];
    164 	int n, i, cc;
    165 	extern errno;
    166 
    167 	(void)sprintf(line, "R%d\n", count);
    168 	n = rmtcall("read", line);
    169 	if (n < 0) {
    170 		errno = n;
    171 		return (-1);
    172 	}
    173 	for (i = 0; i < n; i += cc) {
    174 		cc = read(rmtape, buf+i, n - i);
    175 		if (cc <= 0) {
    176 			rmtconnaborted();
    177 		}
    178 	}
    179 	return (n);
    180 }
    181 
    182 int
    183 rmtwrite(buf, count)
    184 	char *buf;
    185 	int count;
    186 {
    187 	char line[30];
    188 
    189 	(void)sprintf(line, "W%d\n", count);
    190 	write(rmtape, line, strlen(line));
    191 	write(rmtape, buf, count);
    192 	return (rmtreply("write"));
    193 }
    194 
    195 void
    196 rmtwrite0(count)
    197 	int count;
    198 {
    199 	char line[30];
    200 
    201 	(void)sprintf(line, "W%d\n", count);
    202 	write(rmtape, line, strlen(line));
    203 }
    204 
    205 void
    206 rmtwrite1(buf, count)
    207 	char *buf;
    208 	int count;
    209 {
    210 
    211 	write(rmtape, buf, count);
    212 }
    213 
    214 int
    215 rmtwrite2()
    216 {
    217 
    218 	return (rmtreply("write"));
    219 }
    220 
    221 int
    222 rmtseek(offset, pos)
    223 	int offset, pos;
    224 {
    225 	char line[80];
    226 
    227 	(void)sprintf(line, "L%d\n%d\n", offset, pos);
    228 	return (rmtcall("seek", line));
    229 }
    230 
    231 struct	mtget mts;
    232 
    233 struct mtget *
    234 rmtstatus()
    235 {
    236 	register int i;
    237 	register char *cp;
    238 
    239 	if (rmtstate != TS_OPEN)
    240 		return (0);
    241 	rmtcall("status", "S\n");
    242 	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
    243 		*cp++ = rmtgetb();
    244 	return (&mts);
    245 }
    246 
    247 int
    248 rmtioctl(cmd, count)
    249 	int cmd, count;
    250 {
    251 	char buf[256];
    252 
    253 	if (count < 0)
    254 		return (-1);
    255 	(void)sprintf(buf, "I%d\n%d\n", cmd, count);
    256 	return (rmtcall("ioctl", buf));
    257 }
    258 
    259 int
    260 rmtcall(cmd, buf)
    261 	char *cmd, *buf;
    262 {
    263 
    264 	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
    265 		rmtconnaborted();
    266 	return (rmtreply(cmd));
    267 }
    268 
    269 int
    270 rmtreply(cmd)
    271 	char *cmd;
    272 {
    273 	char code[30], emsg[BUFSIZ];
    274 
    275 	rmtgets(code, sizeof (code));
    276 	if (*code == 'E' || *code == 'F') {
    277 		rmtgets(emsg, sizeof (emsg));
    278 		msg("%s: %s\n", cmd, emsg, code + 1);
    279 		if (*code == 'F') {
    280 			rmtstate = TS_CLOSED;
    281 			return (-1);
    282 		}
    283 		return (-1);
    284 	}
    285 	if (*code != 'A') {
    286 		msg("Protocol to remote tape server botched (code %s?).\n",
    287 		    code);
    288 		rmtconnaborted();
    289 	}
    290 	return (atoi(code + 1));
    291 }
    292 
    293 int
    294 rmtgetb()
    295 {
    296 	char c;
    297 
    298 	if (read(rmtape, &c, 1) != 1)
    299 		rmtconnaborted();
    300 	return (c);
    301 }
    302 
    303 void
    304 rmtgets(cp, len)
    305 	char *cp;
    306 	int len;
    307 {
    308 
    309 	while (len > 1) {
    310 		*cp = rmtgetb();
    311 		if (*cp == '\n') {
    312 			cp[1] = 0;
    313 			return;
    314 		}
    315 		cp++;
    316 		len--;
    317 	}
    318 	msg("Protocol to remote tape server botched (in rmtgets).\n");
    319 	rmtconnaborted();
    320 }
    321