Home | History | Annotate | Line # | Download | only in dump
dumprmt.c revision 1.6 
      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[] = "from: @(#)dumprmt.c	8.1 (Berkeley) 6/5/93";*/
     36 static char *rcsid = "$Id: dumprmt.c,v 1.6 1994/06/08 18:57:34 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 #include <sys/param.h>
     40 #include <sys/mtio.h>
     41 #include <sys/ioctl.h>
     42 #include <sys/socket.h>
     43 #include <sys/time.h>
     44 #ifdef sunos
     45 #include <sys/vnode.h>
     46 
     47 #include <ufs/inode.h>
     48 #else
     49 #include <ufs/ufs/dinode.h>
     50 #endif
     51 
     52 #include <netinet/in.h>
     53 #include <netinet/tcp.h>
     54 
     55 #include <protocols/dumprestore.h>
     56 
     57 #include <ctype.h>
     58 #include <netdb.h>
     59 #include <pwd.h>
     60 #include <signal.h>
     61 #include <stdio.h>
     62 #ifdef __STDC__
     63 #include <stdlib.h>
     64 #include <string.h>
     65 #include <unistd.h>
     66 #endif
     67 
     68 #include "pathnames.h"
     69 #include "dump.h"
     70 
     71 #define	TS_CLOSED	0
     72 #define	TS_OPEN		1
     73 
     74 static	int rmtstate = TS_CLOSED;
     75 static	int rmtape;
     76 static	char *rmtpeer;
     77 
     78 static	int okname __P((char *));
     79 static	int rmtcall __P((char *, char *));
     80 static	void rmtconnaborted __P((/* int, int */));
     81 static	int rmtgetb __P((void));
     82 static	void rmtgetconn __P((void));
     83 static	void rmtgets __P((char *, int));
     84 static	int rmtreply __P((char *));
     85 
     86 extern	int ntrec;		/* blocking factor on tape */
     87 
     88 int
     89 rmthost(host)
     90 	char *host;
     91 {
     92 
     93 	rmtpeer = malloc(strlen(host) + 1);
     94 	if (rmtpeer)
     95 		strcpy(rmtpeer, host);
     96 	else
     97 		rmtpeer = host;
     98 	signal(SIGPIPE, rmtconnaborted);
     99 	rmtgetconn();
    100 	if (rmtape < 0)
    101 		return (0);
    102 	return (1);
    103 }
    104 
    105 static void
    106 rmtconnaborted()
    107 {
    108 
    109 	(void) fprintf(stderr, "rdump: Lost connection to remote host.\n");
    110 	exit(1);
    111 }
    112 
    113 void
    114 rmtgetconn()
    115 {
    116 	register char *cp;
    117 	static struct servent *sp = NULL;
    118 	static struct passwd *pwd = NULL;
    119 #ifdef notdef
    120 	static int on = 1;
    121 #endif
    122 	char *tuser;
    123 	int size;
    124 	int maxseg;
    125 
    126 	if (sp == NULL) {
    127 		sp = getservbyname("shell", "tcp");
    128 		if (sp == NULL) {
    129 			(void) fprintf(stderr,
    130 			    "rdump: shell/tcp: unknown service\n");
    131 			exit(1);
    132 		}
    133 		pwd = getpwuid(getuid());
    134 		if (pwd == NULL) {
    135 			(void) fprintf(stderr, "rdump: who are you?\n");
    136 			exit(1);
    137 		}
    138 	}
    139 	if ((cp = index(rmtpeer, '@')) != NULL) {
    140 		tuser = rmtpeer;
    141 		*cp = '\0';
    142 		if (!okname(tuser))
    143 			exit(1);
    144 		rmtpeer = ++cp;
    145 	} else
    146 		tuser = pwd->pw_name;
    147 	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser,
    148 	    _PATH_RMT, (int *)0);
    149 	size = ntrec * TP_BSIZE;
    150 	if (size > 60 * 1024)		/* XXX */
    151 		size = 60 * 1024;
    152 	/* Leave some space for rmt request/response protocol */
    153 	size += 2 * 1024;
    154 	while (size > TP_BSIZE &&
    155 	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
    156 		    size -= TP_BSIZE;
    157 	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
    158 	maxseg = 1024;
    159 	if (setsockopt(rmtape, IPPROTO_TCP, TCP_MAXSEG,
    160 	    &maxseg, sizeof (maxseg)) < 0)
    161 		perror("TCP_MAXSEG setsockopt");
    162 
    163 #ifdef notdef
    164 	if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
    165 		perror("TCP_NODELAY setsockopt");
    166 #endif
    167 }
    168 
    169 static int
    170 okname(cp0)
    171 	char *cp0;
    172 {
    173 	register char *cp;
    174 	register int c;
    175 
    176 	for (cp = cp0; *cp; cp++) {
    177 		c = *cp;
    178 		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
    179 			(void) fprintf(stderr, "rdump: invalid user name %s\n",
    180 			    cp0);
    181 			return (0);
    182 		}
    183 	}
    184 	return (1);
    185 }
    186 
    187 int
    188 rmtopen(tape, mode)
    189 	char *tape;
    190 	int mode;
    191 {
    192 	char buf[256];
    193 
    194 	(void)sprintf(buf, "O%s\n%d\n", tape, mode);
    195 	rmtstate = TS_OPEN;
    196 	return (rmtcall(tape, buf));
    197 }
    198 
    199 void
    200 rmtclose()
    201 {
    202 
    203 	if (rmtstate != TS_OPEN)
    204 		return;
    205 	rmtcall("close", "C\n");
    206 	rmtstate = TS_CLOSED;
    207 }
    208 
    209 int
    210 rmtread(buf, count)
    211 	char *buf;
    212 	int count;
    213 {
    214 	char line[30];
    215 	int n, i, cc;
    216 	extern errno;
    217 
    218 	(void)sprintf(line, "R%d\n", count);
    219 	n = rmtcall("read", line);
    220 	if (n < 0) {
    221 		errno = n;
    222 		return (-1);
    223 	}
    224 	for (i = 0; i < n; i += cc) {
    225 		cc = read(rmtape, buf+i, n - i);
    226 		if (cc <= 0) {
    227 			rmtconnaborted();
    228 		}
    229 	}
    230 	return (n);
    231 }
    232 
    233 int
    234 rmtwrite(buf, count)
    235 	char *buf;
    236 	int count;
    237 {
    238 	char line[30];
    239 
    240 	(void)sprintf(line, "W%d\n", count);
    241 	write(rmtape, line, strlen(line));
    242 	write(rmtape, buf, count);
    243 	return (rmtreply("write"));
    244 }
    245 
    246 void
    247 rmtwrite0(count)
    248 	int count;
    249 {
    250 	char line[30];
    251 
    252 	(void)sprintf(line, "W%d\n", count);
    253 	write(rmtape, line, strlen(line));
    254 }
    255 
    256 void
    257 rmtwrite1(buf, count)
    258 	char *buf;
    259 	int count;
    260 {
    261 
    262 	write(rmtape, buf, count);
    263 }
    264 
    265 int
    266 rmtwrite2()
    267 {
    268 
    269 	return (rmtreply("write"));
    270 }
    271 
    272 int
    273 rmtseek(offset, pos)
    274 	int offset, pos;
    275 {
    276 	char line[80];
    277 
    278 	(void)sprintf(line, "L%d\n%d\n", offset, pos);
    279 	return (rmtcall("seek", line));
    280 }
    281 
    282 struct	mtget mts;
    283 
    284 struct mtget *
    285 rmtstatus()
    286 {
    287 	register int i;
    288 	register char *cp;
    289 
    290 	if (rmtstate != TS_OPEN)
    291 		return (NULL);
    292 	rmtcall("status", "S\n");
    293 	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
    294 		*cp++ = rmtgetb();
    295 	return (&mts);
    296 }
    297 
    298 int
    299 rmtioctl(cmd, count)
    300 	int cmd, count;
    301 {
    302 	char buf[256];
    303 
    304 	if (count < 0)
    305 		return (-1);
    306 	(void)sprintf(buf, "I%d\n%d\n", cmd, count);
    307 	return (rmtcall("ioctl", buf));
    308 }
    309 
    310 static int
    311 rmtcall(cmd, buf)
    312 	char *cmd, *buf;
    313 {
    314 
    315 	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
    316 		rmtconnaborted();
    317 	return (rmtreply(cmd));
    318 }
    319 
    320 static int
    321 rmtreply(cmd)
    322 	char *cmd;
    323 {
    324 	register char *cp;
    325 	char code[30], emsg[BUFSIZ];
    326 
    327 	rmtgets(code, sizeof (code));
    328 	if (*code == 'E' || *code == 'F') {
    329 		rmtgets(emsg, sizeof (emsg));
    330 		msg("%s: %s", cmd, emsg);
    331 		if (*code == 'F') {
    332 			rmtstate = TS_CLOSED;
    333 			return (-1);
    334 		}
    335 		return (-1);
    336 	}
    337 	if (*code != 'A') {
    338 		/* Kill trailing newline */
    339 		cp = code + strlen(code);
    340 		if (cp > code && *--cp == '\n')
    341 			*cp = '\0';
    342 
    343 		msg("Protocol to remote tape server botched (code \"%s\").\n",
    344 		    code);
    345 		rmtconnaborted();
    346 	}
    347 	return (atoi(code + 1));
    348 }
    349 
    350 int
    351 rmtgetb()
    352 {
    353 	char c;
    354 
    355 	if (read(rmtape, &c, 1) != 1)
    356 		rmtconnaborted();
    357 	return (c);
    358 }
    359 
    360 /* Get a line (guaranteed to have a trailing newline). */
    361 void
    362 rmtgets(line, len)
    363 	char *line;
    364 	int len;
    365 {
    366 	register char *cp = line;
    367 
    368 	while (len > 1) {
    369 		*cp = rmtgetb();
    370 		if (*cp == '\n') {
    371 			cp[1] = '\0';
    372 			return;
    373 		}
    374 		cp++;
    375 		len--;
    376 	}
    377 	*cp = '\0';
    378 	msg("Protocol to remote tape server botched.\n");
    379 	msg("(rmtgets got \"%s\").\n", line);
    380 	rmtconnaborted();
    381 }
    382