1 /* $NetBSD: dumprmt.c,v 1.17 1997/06/05 16:10:47 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)dumprmt.c 8.1 (Berkeley) 6/5/93"; 39 #else 40 static char rcsid[] = "$NetBSD: dumprmt.c,v 1.17 1997/06/05 16:10:47 mrg Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/mtio.h> 46 #include <sys/ioctl.h> 47 #include <sys/socket.h> 48 #include <sys/time.h> 49 #ifdef sunos 50 #include <sys/vnode.h> 51 52 #include <ufs/inode.h> 53 #else 54 #include <ufs/ufs/dinode.h> 55 #endif 56 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 61 #include <protocols/dumprestore.h> 62 63 #include <ctype.h> 64 #include <err.h> 65 #include <netdb.h> 66 #include <pwd.h> 67 #include <signal.h> 68 #include <stdio.h> 69 #ifdef __STDC__ 70 #include <stdlib.h> 71 #include <string.h> 72 #include <unistd.h> 73 #endif 74 75 #include "pathnames.h" 76 #include "dump.h" 77 78 #define TS_CLOSED 0 79 #define TS_OPEN 1 80 81 static int rmtstate = TS_CLOSED; 82 static int rmtape; 83 static char *rmtpeer; 84 85 static int okname __P((char *)); 86 static int rmtcall __P((char *, char *)); 87 static void rmtconnaborted __P((/* int, int */)); 88 static int rmtgetb __P((void)); 89 static void rmtgetconn __P((void)); 90 static void rmtgets __P((char *, int)); 91 static int rmtreply __P((char *)); 92 93 extern int ntrec; /* blocking factor on tape */ 94 95 int 96 rmthost(host) 97 char *host; 98 { 99 100 rmtpeer = malloc(strlen(host) + 1); 101 if (rmtpeer) 102 strcpy(rmtpeer, host); 103 else 104 rmtpeer = host; 105 signal(SIGPIPE, rmtconnaborted); 106 rmtgetconn(); 107 if (rmtape < 0) 108 return (0); 109 return (1); 110 } 111 112 static void 113 rmtconnaborted() 114 { 115 116 errx(1, "Lost connection to remote host."); 117 } 118 119 void 120 rmtgetconn() 121 { 122 char *cp; 123 static struct servent *sp = NULL; 124 static struct passwd *pwd = NULL; 125 #ifdef notdef 126 static int on = 1; 127 #endif 128 char *tuser, *name; 129 int size; 130 131 if (sp == NULL) { 132 sp = getservbyname("shell", "tcp"); 133 if (sp == NULL) 134 errx(1, "shell/tcp: unknown service"); 135 pwd = getpwuid(getuid()); 136 if (pwd == NULL) 137 errx(1, "who are you?"); 138 } 139 if ((name = strdup(pwd->pw_name)) == NULL) 140 err(1, "malloc"); 141 if ((cp = strchr(rmtpeer, '@')) != NULL) { 142 tuser = rmtpeer; 143 *cp = '\0'; 144 if (!okname(tuser)) 145 exit(1); 146 rmtpeer = ++cp; 147 } else 148 tuser = name; 149 150 rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, name, tuser, _PATH_RMT, 151 (int *)0); 152 (void)free(name); 153 if (rmtape < 0) 154 return; 155 156 size = ntrec * TP_BSIZE; 157 if (size > 60 * 1024) /* XXX */ 158 size = 60 * 1024; 159 /* Leave some space for rmt request/response protocol */ 160 size += 2 * 1024; 161 while (size > TP_BSIZE && 162 setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) 163 size -= TP_BSIZE; 164 (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); 165 } 166 167 static int 168 okname(cp0) 169 char *cp0; 170 { 171 char *cp; 172 int c; 173 174 for (cp = cp0; *cp; cp++) { 175 c = *cp; 176 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { 177 warnx("invalid user name: %s", cp0); 178 return (0); 179 } 180 } 181 return (1); 182 } 183 184 int 185 rmtopen(tape, mode) 186 char *tape; 187 int mode; 188 { 189 char buf[256]; 190 191 (void)snprintf(buf, sizeof buf, "O%s\n%d\n", tape, mode); 192 rmtstate = TS_OPEN; 193 return (rmtcall(tape, buf)); 194 } 195 196 void 197 rmtclose() 198 { 199 200 if (rmtstate != TS_OPEN) 201 return; 202 rmtcall("close", "C\n"); 203 rmtstate = TS_CLOSED; 204 } 205 206 int 207 rmtread(buf, count) 208 char *buf; 209 int count; 210 { 211 char line[30]; 212 int n, i, cc; 213 extern errno; 214 215 (void)snprintf(line, sizeof line, "R%d\n", count); 216 n = rmtcall("read", line); 217 if (n < 0) { 218 errno = n; 219 return (-1); 220 } 221 for (i = 0; i < n; i += cc) { 222 cc = read(rmtape, buf+i, n - i); 223 if (cc <= 0) { 224 rmtconnaborted(); 225 } 226 } 227 return (n); 228 } 229 230 int 231 rmtwrite(buf, count) 232 char *buf; 233 int count; 234 { 235 char line[30]; 236 237 (void)snprintf(line, sizeof line, "W%d\n", count); 238 write(rmtape, line, strlen(line)); 239 write(rmtape, buf, count); 240 return (rmtreply("write")); 241 } 242 243 void 244 rmtwrite0(count) 245 int count; 246 { 247 char line[30]; 248 249 (void)snprintf(line, sizeof line, "W%d\n", count); 250 write(rmtape, line, strlen(line)); 251 } 252 253 void 254 rmtwrite1(buf, count) 255 char *buf; 256 int count; 257 { 258 259 write(rmtape, buf, count); 260 } 261 262 int 263 rmtwrite2() 264 { 265 266 return (rmtreply("write")); 267 } 268 269 int 270 rmtseek(offset, pos) 271 int offset, pos; 272 { 273 char line[80]; 274 275 (void)snprintf(line, sizeof line, "L%d\n%d\n", offset, pos); 276 return (rmtcall("seek", line)); 277 } 278 279 struct mtget mts; 280 281 struct mtget * 282 rmtstatus() 283 { 284 int i; 285 char *cp; 286 287 if (rmtstate != TS_OPEN) 288 return (NULL); 289 rmtcall("status", "S\n"); 290 for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) 291 *cp++ = rmtgetb(); 292 return (&mts); 293 } 294 295 int 296 rmtioctl(cmd, count) 297 int cmd, count; 298 { 299 char buf[256]; 300 301 if (count < 0) 302 return (-1); 303 (void)snprintf(buf, sizeof buf, "I%d\n%d\n", cmd, count); 304 return (rmtcall("ioctl", buf)); 305 } 306 307 static int 308 rmtcall(cmd, buf) 309 char *cmd, *buf; 310 { 311 312 if (write(rmtape, buf, strlen(buf)) != strlen(buf)) 313 rmtconnaborted(); 314 return (rmtreply(cmd)); 315 } 316 317 static int 318 rmtreply(cmd) 319 char *cmd; 320 { 321 char *cp; 322 char code[30], emsg[BUFSIZ]; 323 324 rmtgets(code, sizeof (code)); 325 if (*code == 'E' || *code == 'F') { 326 rmtgets(emsg, sizeof (emsg)); 327 msg("%s: %s", cmd, emsg); 328 if (*code == 'F') { 329 rmtstate = TS_CLOSED; 330 return (-1); 331 } 332 return (-1); 333 } 334 if (*code != 'A') { 335 /* Kill trailing newline */ 336 cp = code + strlen(code); 337 if (cp > code && *--cp == '\n') 338 *cp = '\0'; 339 340 msg("Protocol to remote tape server botched (code \"%s\").\n", 341 code); 342 rmtconnaborted(); 343 } 344 return (atoi(code + 1)); 345 } 346 347 int 348 rmtgetb() 349 { 350 char c; 351 352 if (read(rmtape, &c, 1) != 1) 353 rmtconnaborted(); 354 return (c); 355 } 356 357 /* Get a line (guaranteed to have a trailing newline). */ 358 void 359 rmtgets(line, len) 360 char *line; 361 int len; 362 { 363 char *cp = line; 364 365 while (len > 1) { 366 *cp = rmtgetb(); 367 if (*cp == '\n') { 368 cp[1] = '\0'; 369 return; 370 } 371 cp++; 372 len--; 373 } 374 *cp = '\0'; 375 msg("Protocol to remote tape server botched.\n"); 376 msg("(rmtgets got \"%s\").\n", line); 377 rmtconnaborted(); 378 } 379