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dumprmt.c revision 1.1.1.2 
      1 /*-
      2  * Copyright (c) 1980, 1993
      3  *	The Regents of the University of California.  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 static char sccsid[] = "@(#)dumprmt.c	8.1 (Berkeley) 6/5/93";
     36 #endif /* not lint */
     37 
     38 #include <sys/param.h>
     39 #include <sys/mtio.h>
     40 #include <sys/ioctl.h>
     41 #include <sys/socket.h>
     42 #include <sys/time.h>
     43 #ifdef sunos
     44 #include <sys/vnode.h>
     45 
     46 #include <ufs/inode.h>
     47 #else
     48 #include <ufs/ufs/dinode.h>
     49 #endif
     50 
     51 #include <netinet/in.h>
     52 #include <netinet/tcp.h>
     53 
     54 #include <protocols/dumprestore.h>
     55 
     56 #include <ctype.h>
     57 #include <netdb.h>
     58 #include <pwd.h>
     59 #include <signal.h>
     60 #include <stdio.h>
     61 #ifdef __STDC__
     62 #include <stdlib.h>
     63 #include <string.h>
     64 #include <unistd.h>
     65 #endif
     66 
     67 #include "pathnames.h"
     68 #include "dump.h"
     69 
     70 #define	TS_CLOSED	0
     71 #define	TS_OPEN		1
     72 
     73 static	int rmtstate = TS_CLOSED;
     74 static	int rmtape;
     75 static	char *rmtpeer;
     76 
     77 static	int okname __P((char *));
     78 static	int rmtcall __P((char *, char *));
     79 static	void rmtconnaborted __P((/* int, int */));
     80 static	int rmtgetb __P((void));
     81 static	void rmtgetconn __P((void));
     82 static	void rmtgets __P((char *, int));
     83 static	int rmtreply __P((char *));
     84 
     85 extern	int ntrec;		/* blocking factor on tape */
     86 
     87 int
     88 rmthost(host)
     89 	char *host;
     90 {
     91 
     92 	rmtpeer = malloc(strlen(host) + 1);
     93 	if (rmtpeer)
     94 		strcpy(rmtpeer, host);
     95 	else
     96 		rmtpeer = host;
     97 	signal(SIGPIPE, rmtconnaborted);
     98 	rmtgetconn();
     99 	if (rmtape < 0)
    100 		return (0);
    101 	return (1);
    102 }
    103 
    104 static void
    105 rmtconnaborted()
    106 {
    107 
    108 	(void) fprintf(stderr, "rdump: Lost connection to remote host.\n");
    109 	exit(1);
    110 }
    111 
    112 void
    113 rmtgetconn()
    114 {
    115 	register char *cp;
    116 	static struct servent *sp = NULL;
    117 	static struct passwd *pwd = NULL;
    118 #ifdef notdef
    119 	static int on = 1;
    120 #endif
    121 	char *tuser;
    122 	int size;
    123 	int maxseg;
    124 
    125 	if (sp == NULL) {
    126 		sp = getservbyname("shell", "tcp");
    127 		if (sp == NULL) {
    128 			(void) fprintf(stderr,
    129 			    "rdump: shell/tcp: unknown service\n");
    130 			exit(1);
    131 		}
    132 		pwd = getpwuid(getuid());
    133 		if (pwd == NULL) {
    134 			(void) fprintf(stderr, "rdump: who are you?\n");
    135 			exit(1);
    136 		}
    137 	}
    138 	if ((cp = index(rmtpeer, '@')) != NULL) {
    139 		tuser = rmtpeer;
    140 		*cp = '\0';
    141 		if (!okname(tuser))
    142 			exit(1);
    143 		rmtpeer = ++cp;
    144 	} else
    145 		tuser = pwd->pw_name;
    146 	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser,
    147 	    _PATH_RMT, (int *)0);
    148 	size = ntrec * TP_BSIZE;
    149 	if (size > 60 * 1024)		/* XXX */
    150 		size = 60 * 1024;
    151 	/* Leave some space for rmt request/response protocol */
    152 	size += 2 * 1024;
    153 	while (size > TP_BSIZE &&
    154 	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
    155 		    size -= TP_BSIZE;
    156 	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
    157 	maxseg = 1024;
    158 	if (setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG,
    159 	    &maxseg, sizeof (maxseg)) < 0)
    160 		perror("TCP_MAXSEG setsockopt");
    161 
    162 #ifdef notdef
    163 	if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
    164 		perror("TCP_NODELAY setsockopt");
    165 #endif
    166 }
    167 
    168 static int
    169 okname(cp0)
    170 	char *cp0;
    171 {
    172 	register char *cp;
    173 	register int c;
    174 
    175 	for (cp = cp0; *cp; cp++) {
    176 		c = *cp;
    177 		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
    178 			(void) fprintf(stderr, "rdump: invalid user name %s\n",
    179 			    cp0);
    180 			return (0);
    181 		}
    182 	}
    183 	return (1);
    184 }
    185 
    186 int
    187 rmtopen(tape, mode)
    188 	char *tape;
    189 	int mode;
    190 {
    191 	char buf[256];
    192 
    193 	(void)sprintf(buf, "O%s\n%d\n", tape, mode);
    194 	rmtstate = TS_OPEN;
    195 	return (rmtcall(tape, buf));
    196 }
    197 
    198 void
    199 rmtclose()
    200 {
    201 
    202 	if (rmtstate != TS_OPEN)
    203 		return;
    204 	rmtcall("close", "C\n");
    205 	rmtstate = TS_CLOSED;
    206 }
    207 
    208 int
    209 rmtread(buf, count)
    210 	char *buf;
    211 	int count;
    212 {
    213 	char line[30];
    214 	int n, i, cc;
    215 	extern errno;
    216 
    217 	(void)sprintf(line, "R%d\n", count);
    218 	n = rmtcall("read", line);
    219 	if (n < 0) {
    220 		errno = n;
    221 		return (-1);
    222 	}
    223 	for (i = 0; i < n; i += cc) {
    224 		cc = read(rmtape, buf+i, n - i);
    225 		if (cc <= 0) {
    226 			rmtconnaborted();
    227 		}
    228 	}
    229 	return (n);
    230 }
    231 
    232 int
    233 rmtwrite(buf, count)
    234 	char *buf;
    235 	int count;
    236 {
    237 	char line[30];
    238 
    239 	(void)sprintf(line, "W%d\n", count);
    240 	write(rmtape, line, strlen(line));
    241 	write(rmtape, buf, count);
    242 	return (rmtreply("write"));
    243 }
    244 
    245 void
    246 rmtwrite0(count)
    247 	int count;
    248 {
    249 	char line[30];
    250 
    251 	(void)sprintf(line, "W%d\n", count);
    252 	write(rmtape, line, strlen(line));
    253 }
    254 
    255 void
    256 rmtwrite1(buf, count)
    257 	char *buf;
    258 	int count;
    259 {
    260 
    261 	write(rmtape, buf, count);
    262 }
    263 
    264 int
    265 rmtwrite2()
    266 {
    267 
    268 	return (rmtreply("write"));
    269 }
    270 
    271 int
    272 rmtseek(offset, pos)
    273 	int offset, pos;
    274 {
    275 	char line[80];
    276 
    277 	(void)sprintf(line, "L%d\n%d\n", offset, pos);
    278 	return (rmtcall("seek", line));
    279 }
    280 
    281 struct	mtget mts;
    282 
    283 struct mtget *
    284 rmtstatus()
    285 {
    286 	register int i;
    287 	register char *cp;
    288 
    289 	if (rmtstate != TS_OPEN)
    290 		return (NULL);
    291 	rmtcall("status", "S\n");
    292 	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
    293 		*cp++ = rmtgetb();
    294 	return (&mts);
    295 }
    296 
    297 int
    298 rmtioctl(cmd, count)
    299 	int cmd, count;
    300 {
    301 	char buf[256];
    302 
    303 	if (count < 0)
    304 		return (-1);
    305 	(void)sprintf(buf, "I%d\n%d\n", cmd, count);
    306 	return (rmtcall("ioctl", buf));
    307 }
    308 
    309 static int
    310 rmtcall(cmd, buf)
    311 	char *cmd, *buf;
    312 {
    313 
    314 	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
    315 		rmtconnaborted();
    316 	return (rmtreply(cmd));
    317 }
    318 
    319 static int
    320 rmtreply(cmd)
    321 	char *cmd;
    322 {
    323 	register char *cp;
    324 	char code[30], emsg[BUFSIZ];
    325 
    326 	rmtgets(code, sizeof (code));
    327 	if (*code == 'E' || *code == 'F') {
    328 		rmtgets(emsg, sizeof (emsg));
    329 		msg("%s: %s", cmd, emsg);
    330 		if (*code == 'F') {
    331 			rmtstate = TS_CLOSED;
    332 			return (-1);
    333 		}
    334 		return (-1);
    335 	}
    336 	if (*code != 'A') {
    337 		/* Kill trailing newline */
    338 		cp = code + strlen(code);
    339 		if (cp > code && *--cp == '\n')
    340 			*cp = '\0';
    341 
    342 		msg("Protocol to remote tape server botched (code \"%s\").\n",
    343 		    code);
    344 		rmtconnaborted();
    345 	}
    346 	return (atoi(code + 1));
    347 }
    348 
    349 int
    350 rmtgetb()
    351 {
    352 	char c;
    353 
    354 	if (read(rmtape, &c, 1) != 1)
    355 		rmtconnaborted();
    356 	return (c);
    357 }
    358 
    359 /* Get a line (guaranteed to have a trailing newline). */
    360 void
    361 rmtgets(line, len)
    362 	char *line;
    363 	int len;
    364 {
    365 	register char *cp = line;
    366 
    367 	while (len > 1) {
    368 		*cp = rmtgetb();
    369 		if (*cp == '\n') {
    370 			cp[1] = '\0';
    371 			return;
    372 		}
    373 		cp++;
    374 		len--;
    375 	}
    376 	*cp = '\0';
    377 	msg("Protocol to remote tape server botched.\n");
    378 	msg("(rmtgets got \"%s\").\n", line);
    379 	rmtconnaborted();
    380 }
    381