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dumprmt.c revision 1.34.2.2
      1  1.34.2.2      yamt /*	$NetBSD: dumprmt.c,v 1.34.2.2 2014/05/22 11:37:27 yamt Exp $	*/
      2       1.9       cgd 
      3       1.1       cgd /*-
      4       1.6   mycroft  * Copyright (c) 1980, 1993
      5       1.6   mycroft  *	The Regents of the University of California.  All rights reserved.
      6       1.1       cgd  *
      7       1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8       1.1       cgd  * modification, are permitted provided that the following conditions
      9       1.1       cgd  * are met:
     10       1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11       1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12       1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14       1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15      1.30       agc  * 3. Neither the name of the University nor the names of its contributors
     16       1.1       cgd  *    may be used to endorse or promote products derived from this software
     17       1.1       cgd  *    without specific prior written permission.
     18       1.1       cgd  *
     19       1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20       1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21       1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22       1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23       1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24       1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25       1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26       1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27       1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28       1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29       1.1       cgd  * SUCH DAMAGE.
     30       1.1       cgd  */
     31       1.1       cgd 
     32      1.18     lukem #include <sys/cdefs.h>
     33       1.1       cgd #ifndef lint
     34       1.9       cgd #if 0
     35      1.19     lukem static char sccsid[] = "@(#)dumprmt.c	8.3 (Berkeley) 4/28/95";
     36       1.9       cgd #else
     37  1.34.2.2      yamt __RCSID("$NetBSD: dumprmt.c,v 1.34.2.2 2014/05/22 11:37:27 yamt Exp $");
     38       1.9       cgd #endif
     39       1.1       cgd #endif /* not lint */
     40       1.1       cgd 
     41       1.5       cgd #include <sys/param.h>
     42       1.5       cgd #include <sys/mtio.h>
     43       1.5       cgd #include <sys/ioctl.h>
     44       1.5       cgd #include <sys/socket.h>
     45       1.6   mycroft #include <sys/time.h>
     46       1.1       cgd 
     47       1.1       cgd #include <netinet/in.h>
     48      1.11   thorpej #include <netinet/in_systm.h>
     49      1.11   thorpej #include <netinet/ip.h>
     50      1.21   thorpej #include <netinet/tcp.h>
     51       1.6   mycroft 
     52       1.6   mycroft #include <ctype.h>
     53       1.7   mycroft #include <err.h>
     54      1.20       mrg #include <errno.h>
     55       1.1       cgd #include <netdb.h>
     56       1.1       cgd #include <pwd.h>
     57       1.6   mycroft #include <signal.h>
     58       1.6   mycroft #include <stdio.h>
     59       1.1       cgd #include <stdlib.h>
     60       1.1       cgd #include <string.h>
     61       1.6   mycroft #include <unistd.h>
     62       1.6   mycroft 
     63       1.1       cgd #include "pathnames.h"
     64       1.6   mycroft #include "dump.h"
     65       1.1       cgd 
     66       1.1       cgd #define	TS_CLOSED	0
     67       1.1       cgd #define	TS_OPEN		1
     68       1.1       cgd 
     69       1.1       cgd static	int rmtstate = TS_CLOSED;
     70       1.6   mycroft static	int rmtape;
     71       1.6   mycroft static	char *rmtpeer;
     72       1.1       cgd 
     73  1.34.2.1      yamt static	int	okname(const char *);
     74      1.31  christos static	int	rmtcall(const char *, const char *, int);
     75      1.34     joerg __dead static	void	rmtconnaborted(int);
     76      1.24     lukem static	int	rmtgetb(void);
     77      1.24     lukem static	void	rmtgetconn(void);
     78      1.24     lukem static	void	rmtgets(char *, int);
     79      1.24     lukem 	int	rmtread(char *, int);
     80      1.31  christos static	int	rmtreply(const char *, int);
     81      1.24     lukem 	int	rmtseek(int, int);
     82       1.1       cgd 
     83       1.6   mycroft extern	int ntrec;		/* blocking factor on tape */
     84       1.5       cgd 
     85       1.1       cgd int
     86      1.31  christos rmthost(const char *host)
     87       1.1       cgd {
     88       1.1       cgd 
     89      1.23     lukem 	if ((rmtpeer = strdup(host)) == NULL)
     90      1.29     lukem 		err(X_STARTUP, "strdup");
     91       1.1       cgd 	signal(SIGPIPE, rmtconnaborted);
     92       1.1       cgd 	rmtgetconn();
     93       1.1       cgd 	if (rmtape < 0)
     94       1.1       cgd 		return (0);
     95       1.1       cgd 	return (1);
     96       1.1       cgd }
     97       1.1       cgd 
     98       1.6   mycroft static void
     99      1.32  christos rmtconnaborted(int dummy __unused)
    100       1.1       cgd {
    101       1.1       cgd 
    102      1.29     lukem 	errx(X_ABORT, "Lost connection to remote host.");
    103       1.1       cgd }
    104       1.1       cgd 
    105       1.1       cgd void
    106      1.24     lukem rmtgetconn(void)
    107       1.1       cgd {
    108      1.12     lukem 	char *cp;
    109       1.6   mycroft 	static struct servent *sp = NULL;
    110       1.6   mycroft 	static struct passwd *pwd = NULL;
    111      1.17       mrg 	char *tuser, *name;
    112      1.21   thorpej 	int size, opt;
    113       1.1       cgd 
    114       1.6   mycroft 	if (sp == NULL) {
    115       1.1       cgd 		sp = getservbyname("shell", "tcp");
    116       1.7   mycroft 		if (sp == NULL)
    117      1.29     lukem 			errx(X_STARTUP, "shell/tcp: unknown service");
    118       1.6   mycroft 		pwd = getpwuid(getuid());
    119       1.7   mycroft 		if (pwd == NULL)
    120      1.29     lukem 			errx(X_STARTUP, "who are you?");
    121       1.1       cgd 	}
    122      1.17       mrg 	if ((name = strdup(pwd->pw_name)) == NULL)
    123      1.29     lukem 		err(X_STARTUP, "strdup");
    124       1.8   mycroft 	if ((cp = strchr(rmtpeer, '@')) != NULL) {
    125       1.6   mycroft 		tuser = rmtpeer;
    126       1.6   mycroft 		*cp = '\0';
    127       1.6   mycroft 		if (!okname(tuser))
    128      1.29     lukem 			exit(X_STARTUP);
    129       1.6   mycroft 		rmtpeer = ++cp;
    130       1.6   mycroft 	} else
    131      1.17       mrg 		tuser = name;
    132      1.10    scottr 
    133      1.17       mrg 	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, name, tuser, _PATH_RMT,
    134      1.17       mrg 	    (int *)0);
    135      1.17       mrg 	(void)free(name);
    136      1.11   thorpej 	if (rmtape < 0)
    137      1.11   thorpej 		return;
    138      1.10    scottr 
    139       1.1       cgd 	size = ntrec * TP_BSIZE;
    140       1.6   mycroft 	if (size > 60 * 1024)		/* XXX */
    141       1.6   mycroft 		size = 60 * 1024;
    142       1.6   mycroft 	/* Leave some space for rmt request/response protocol */
    143       1.6   mycroft 	size += 2 * 1024;
    144       1.1       cgd 	while (size > TP_BSIZE &&
    145       1.1       cgd 	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
    146       1.6   mycroft 		    size -= TP_BSIZE;
    147       1.6   mycroft 	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
    148      1.21   thorpej 
    149      1.21   thorpej 	opt = IPTOS_THROUGHPUT;
    150      1.21   thorpej 	(void)setsockopt(rmtape, IPPROTO_IP, IP_TOS, &opt, sizeof (opt));
    151      1.21   thorpej 
    152      1.21   thorpej 	opt = 1;
    153      1.21   thorpej 	(void)setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof (opt));
    154       1.6   mycroft }
    155       1.6   mycroft 
    156       1.6   mycroft static int
    157  1.34.2.1      yamt okname(const char *cp0)
    158       1.6   mycroft {
    159  1.34.2.1      yamt 	const char *cp;
    160  1.34.2.1      yamt 	unsigned char c;
    161       1.6   mycroft 
    162       1.6   mycroft 	for (cp = cp0; *cp; cp++) {
    163       1.6   mycroft 		c = *cp;
    164       1.6   mycroft 		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
    165       1.7   mycroft 			warnx("invalid user name: %s", cp0);
    166       1.6   mycroft 			return (0);
    167       1.6   mycroft 		}
    168       1.6   mycroft 	}
    169       1.6   mycroft 	return (1);
    170       1.1       cgd }
    171       1.1       cgd 
    172       1.1       cgd int
    173      1.31  christos rmtopen(const char *tapedevice, int mode, int verbose)
    174       1.1       cgd {
    175       1.1       cgd 	char buf[256];
    176       1.1       cgd 
    177      1.26     lukem 	(void)snprintf(buf, sizeof buf, "O%s\n%d\n", tapedevice, mode);
    178       1.1       cgd 	rmtstate = TS_OPEN;
    179      1.27    bouyer 	return (rmtcall(tapedevice, buf, verbose));
    180       1.1       cgd }
    181       1.1       cgd 
    182       1.1       cgd void
    183      1.24     lukem rmtclose(void)
    184       1.1       cgd {
    185       1.1       cgd 
    186       1.1       cgd 	if (rmtstate != TS_OPEN)
    187       1.1       cgd 		return;
    188      1.27    bouyer 	rmtcall("close", "C\n", 1);
    189       1.1       cgd 	rmtstate = TS_CLOSED;
    190       1.1       cgd }
    191       1.1       cgd 
    192       1.1       cgd int
    193      1.24     lukem rmtread(char *buf, int count)
    194       1.1       cgd {
    195       1.1       cgd 	char line[30];
    196       1.1       cgd 	int n, i, cc;
    197       1.1       cgd 
    198      1.13       mrg 	(void)snprintf(line, sizeof line, "R%d\n", count);
    199      1.27    bouyer 	n = rmtcall("read", line, 1);
    200       1.1       cgd 	if (n < 0) {
    201      1.29     lukem 		/* rmtcall() properly sets errno for us on errors. */
    202      1.29     lukem 		return (n);
    203       1.1       cgd 	}
    204       1.1       cgd 	for (i = 0; i < n; i += cc) {
    205       1.1       cgd 		cc = read(rmtape, buf+i, n - i);
    206       1.1       cgd 		if (cc <= 0) {
    207      1.18     lukem 			rmtconnaborted(0);
    208       1.1       cgd 		}
    209       1.1       cgd 	}
    210       1.1       cgd 	return (n);
    211       1.1       cgd }
    212       1.1       cgd 
    213       1.1       cgd int
    214      1.31  christos rmtwrite(const char *buf, int count)
    215       1.1       cgd {
    216       1.1       cgd 	char line[30];
    217       1.1       cgd 
    218      1.13       mrg 	(void)snprintf(line, sizeof line, "W%d\n", count);
    219       1.1       cgd 	write(rmtape, line, strlen(line));
    220       1.1       cgd 	write(rmtape, buf, count);
    221      1.27    bouyer 	return (rmtreply("write", 1));
    222       1.1       cgd }
    223       1.1       cgd 
    224      1.18     lukem #if 0		/* XXX unused? */
    225       1.1       cgd void
    226      1.24     lukem rmtwrite0(int count)
    227       1.1       cgd {
    228       1.1       cgd 	char line[30];
    229       1.1       cgd 
    230      1.13       mrg 	(void)snprintf(line, sizeof line, "W%d\n", count);
    231       1.1       cgd 	write(rmtape, line, strlen(line));
    232       1.1       cgd }
    233       1.1       cgd 
    234       1.1       cgd void
    235      1.24     lukem rmtwrite1(char *buf, int count)
    236       1.1       cgd {
    237       1.1       cgd 
    238       1.1       cgd 	write(rmtape, buf, count);
    239       1.1       cgd }
    240       1.1       cgd 
    241       1.1       cgd int
    242      1.24     lukem rmtwrite2(void)
    243       1.1       cgd {
    244       1.1       cgd 
    245      1.27    bouyer 	return (rmtreply("write", 1));
    246       1.1       cgd }
    247      1.18     lukem #endif
    248       1.1       cgd 
    249       1.1       cgd int
    250      1.24     lukem rmtseek(int offset, int pos)
    251       1.1       cgd {
    252       1.1       cgd 	char line[80];
    253       1.1       cgd 
    254      1.13       mrg 	(void)snprintf(line, sizeof line, "L%d\n%d\n", offset, pos);
    255      1.27    bouyer 	return (rmtcall("seek", line, 1));
    256       1.1       cgd }
    257       1.1       cgd 
    258       1.1       cgd 
    259      1.18     lukem #if 0		/* XXX unused? */
    260       1.1       cgd struct mtget *
    261      1.24     lukem rmtstatus(void)
    262       1.1       cgd {
    263      1.18     lukem 	struct	mtget mts;
    264      1.12     lukem 	int i;
    265      1.12     lukem 	char *cp;
    266       1.1       cgd 
    267       1.1       cgd 	if (rmtstate != TS_OPEN)
    268       1.6   mycroft 		return (NULL);
    269      1.27    bouyer 	rmtcall("status", "S\n", 1);
    270       1.1       cgd 	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
    271       1.1       cgd 		*cp++ = rmtgetb();
    272       1.1       cgd 	return (&mts);
    273       1.1       cgd }
    274      1.18     lukem #endif
    275       1.1       cgd 
    276       1.1       cgd int
    277      1.24     lukem rmtioctl(int cmd, int count)
    278       1.1       cgd {
    279       1.1       cgd 	char buf[256];
    280       1.1       cgd 
    281       1.1       cgd 	if (count < 0)
    282       1.1       cgd 		return (-1);
    283      1.13       mrg 	(void)snprintf(buf, sizeof buf, "I%d\n%d\n", cmd, count);
    284      1.27    bouyer 	return (rmtcall("ioctl", buf, 1));
    285       1.1       cgd }
    286       1.1       cgd 
    287       1.6   mycroft static int
    288      1.31  christos rmtcall(const char *cmd, const char *buf, int verbose)
    289       1.1       cgd {
    290       1.1       cgd 
    291      1.33     lukem 	if ((size_t)write(rmtape, buf, strlen(buf)) != strlen(buf))
    292      1.18     lukem 		rmtconnaborted(0);
    293      1.27    bouyer 	return (rmtreply(cmd, verbose));
    294       1.1       cgd }
    295       1.1       cgd 
    296       1.6   mycroft static int
    297      1.31  christos rmtreply(const char *cmd, int verbose)
    298       1.1       cgd {
    299      1.12     lukem 	char *cp;
    300       1.1       cgd 	char code[30], emsg[BUFSIZ];
    301       1.1       cgd 
    302       1.1       cgd 	rmtgets(code, sizeof (code));
    303       1.1       cgd 	if (*code == 'E' || *code == 'F') {
    304       1.1       cgd 		rmtgets(emsg, sizeof (emsg));
    305      1.27    bouyer 		if (verbose)
    306      1.27    bouyer 			msg("%s: %s", cmd, emsg);
    307      1.29     lukem 		errno = atoi(code + 1);
    308      1.29     lukem 		if (*code == 'F')
    309       1.1       cgd 			rmtstate = TS_CLOSED;
    310       1.1       cgd 		return (-1);
    311       1.1       cgd 	}
    312       1.1       cgd 	if (*code != 'A') {
    313       1.6   mycroft 		/* Kill trailing newline */
    314       1.6   mycroft 		cp = code + strlen(code);
    315       1.6   mycroft 		if (cp > code && *--cp == '\n')
    316       1.6   mycroft 			*cp = '\0';
    317       1.6   mycroft 
    318       1.6   mycroft 		msg("Protocol to remote tape server botched (code \"%s\").\n",
    319       1.1       cgd 		    code);
    320      1.18     lukem 		rmtconnaborted(0);
    321       1.1       cgd 	}
    322       1.1       cgd 	return (atoi(code + 1));
    323       1.1       cgd }
    324       1.1       cgd 
    325       1.1       cgd int
    326      1.24     lukem rmtgetb(void)
    327       1.1       cgd {
    328       1.1       cgd 	char c;
    329       1.1       cgd 
    330       1.1       cgd 	if (read(rmtape, &c, 1) != 1)
    331      1.18     lukem 		rmtconnaborted(0);
    332       1.1       cgd 	return (c);
    333       1.1       cgd }
    334       1.1       cgd 
    335       1.6   mycroft /* Get a line (guaranteed to have a trailing newline). */
    336       1.1       cgd void
    337      1.24     lukem rmtgets(char *line, int len)
    338       1.1       cgd {
    339      1.12     lukem 	char *cp = line;
    340       1.1       cgd 
    341       1.1       cgd 	while (len > 1) {
    342       1.1       cgd 		*cp = rmtgetb();
    343       1.1       cgd 		if (*cp == '\n') {
    344       1.6   mycroft 			cp[1] = '\0';
    345       1.1       cgd 			return;
    346       1.1       cgd 		}
    347       1.1       cgd 		cp++;
    348       1.1       cgd 		len--;
    349       1.1       cgd 	}
    350       1.6   mycroft 	*cp = '\0';
    351       1.6   mycroft 	msg("Protocol to remote tape server botched.\n");
    352       1.6   mycroft 	msg("(rmtgets got \"%s\").\n", line);
    353      1.18     lukem 	rmtconnaborted(0);
    354       1.1       cgd }
    355