1 /* 2 * Copyright (c) 1983, 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[] = "@(#)docmd.c 8.1 (Berkeley) 6/9/93"; 36 #endif /* not lint */ 37 38 #include "defs.h" 39 #include <setjmp.h> 40 #include <netdb.h> 41 42 FILE *lfp; /* log file for recording files updated */ 43 struct subcmd *subcmds; /* list of sub-commands for current cmd */ 44 jmp_buf env; 45 46 static int makeconn __P((char *)); 47 static int okname __P((char *)); 48 static void closeconn __P((void)); 49 static void cmptime __P((char *)); 50 static void doarrow __P((char **, 51 struct namelist *, char *, struct subcmd *)); 52 static void dodcolon __P((char **, 53 struct namelist *, char *, struct subcmd *)); 54 static void notify __P((char *, char *, struct namelist *, time_t)); 55 static void rcmptime __P((struct stat *)); 56 57 /* 58 * Do the commands in cmds (initialized by yyparse). 59 */ 60 void 61 docmds(dhosts, argc, argv) 62 char **dhosts; 63 int argc; 64 char **argv; 65 { 66 register struct cmd *c; 67 register struct namelist *f; 68 register char **cpp; 69 extern struct cmd *cmds; 70 71 signal(SIGHUP, cleanup); 72 signal(SIGINT, cleanup); 73 signal(SIGQUIT, cleanup); 74 signal(SIGTERM, cleanup); 75 76 for (c = cmds; c != NULL; c = c->c_next) { 77 if (dhosts != NULL && *dhosts != NULL) { 78 for (cpp = dhosts; *cpp; cpp++) 79 if (strcmp(c->c_name, *cpp) == 0) 80 goto fndhost; 81 continue; 82 } 83 fndhost: 84 if (argc) { 85 for (cpp = argv; *cpp; cpp++) { 86 if (c->c_label != NULL && 87 strcmp(c->c_label, *cpp) == 0) { 88 cpp = NULL; 89 goto found; 90 } 91 for (f = c->c_files; f != NULL; f = f->n_next) 92 if (strcmp(f->n_name, *cpp) == 0) 93 goto found; 94 } 95 continue; 96 } else 97 cpp = NULL; 98 found: 99 switch (c->c_type) { 100 case ARROW: 101 doarrow(cpp, c->c_files, c->c_name, c->c_cmds); 102 break; 103 case DCOLON: 104 dodcolon(cpp, c->c_files, c->c_name, c->c_cmds); 105 break; 106 default: 107 fatal("illegal command type %d\n", c->c_type); 108 } 109 } 110 closeconn(); 111 } 112 113 /* 114 * Process commands for sending files to other machines. 115 */ 116 static void 117 doarrow(filev, files, rhost, cmds) 118 char **filev; 119 struct namelist *files; 120 char *rhost; 121 struct subcmd *cmds; 122 { 123 register struct namelist *f; 124 register struct subcmd *sc; 125 register char **cpp; 126 int n, ddir, opts = options; 127 128 if (debug) 129 printf("doarrow(%x, %s, %x)\n", files, rhost, cmds); 130 131 if (files == NULL) { 132 error("no files to be updated\n"); 133 return; 134 } 135 136 subcmds = cmds; 137 ddir = files->n_next != NULL; /* destination is a directory */ 138 if (nflag) 139 printf("updating host %s\n", rhost); 140 else { 141 if (setjmp(env)) 142 goto done; 143 signal(SIGPIPE, lostconn); 144 if (!makeconn(rhost)) 145 return; 146 if ((lfp = fopen(tempfile, "w")) == NULL) { 147 fatal("cannot open %s\n", tempfile); 148 exit(1); 149 } 150 } 151 for (f = files; f != NULL; f = f->n_next) { 152 if (filev) { 153 for (cpp = filev; *cpp; cpp++) 154 if (strcmp(f->n_name, *cpp) == 0) 155 goto found; 156 if (!nflag) 157 (void) fclose(lfp); 158 continue; 159 } 160 found: 161 n = 0; 162 for (sc = cmds; sc != NULL; sc = sc->sc_next) { 163 if (sc->sc_type != INSTALL) 164 continue; 165 n++; 166 install(f->n_name, sc->sc_name, 167 sc->sc_name == NULL ? 0 : ddir, sc->sc_options); 168 opts = sc->sc_options; 169 } 170 if (n == 0) 171 install(f->n_name, NULL, 0, options); 172 } 173 done: 174 if (!nflag) { 175 (void) signal(SIGPIPE, cleanup); 176 (void) fclose(lfp); 177 lfp = NULL; 178 } 179 for (sc = cmds; sc != NULL; sc = sc->sc_next) 180 if (sc->sc_type == NOTIFY) 181 notify(tempfile, rhost, sc->sc_args, 0); 182 if (!nflag) { 183 (void) unlink(tempfile); 184 for (; ihead != NULL; ihead = ihead->nextp) { 185 free(ihead); 186 if ((opts & IGNLNKS) || ihead->count == 0) 187 continue; 188 log(lfp, "%s: Warning: missing links\n", 189 ihead->pathname); 190 } 191 } 192 } 193 194 /* 195 * Create a connection to the rdist server on the machine rhost. 196 */ 197 static int 198 makeconn(rhost) 199 char *rhost; 200 { 201 register char *ruser, *cp; 202 static char *cur_host = NULL; 203 static int port = -1; 204 char tuser[20]; 205 int n; 206 extern char user[]; 207 extern int userid; 208 209 if (debug) 210 printf("makeconn(%s)\n", rhost); 211 212 if (cur_host != NULL && rem >= 0) { 213 if (strcmp(cur_host, rhost) == 0) 214 return(1); 215 closeconn(); 216 } 217 cur_host = rhost; 218 cp = index(rhost, '@'); 219 if (cp != NULL) { 220 char c = *cp; 221 222 *cp = '\0'; 223 strncpy(tuser, rhost, sizeof(tuser)-1); 224 *cp = c; 225 rhost = cp + 1; 226 ruser = tuser; 227 if (*ruser == '\0') 228 ruser = user; 229 else if (!okname(ruser)) 230 return(0); 231 } else 232 ruser = user; 233 if (!qflag) 234 printf("updating host %s\n", rhost); 235 (void) sprintf(buf, "%s -Server%s", _PATH_RDIST, qflag ? " -q" : ""); 236 if (port < 0) { 237 struct servent *sp; 238 239 if ((sp = getservbyname("shell", "tcp")) == NULL) 240 fatal("shell/tcp: unknown service"); 241 port = sp->s_port; 242 } 243 244 if (debug) { 245 printf("port = %d, luser = %s, ruser = %s\n", ntohs(port), user, ruser); 246 printf("buf = %s\n", buf); 247 } 248 249 fflush(stdout); 250 seteuid(0); 251 rem = rcmd(&rhost, port, user, ruser, buf, 0); 252 seteuid(userid); 253 if (rem < 0) 254 return(0); 255 cp = buf; 256 if (read(rem, cp, 1) != 1) 257 lostconn(0); 258 if (*cp == 'V') { 259 do { 260 if (read(rem, cp, 1) != 1) 261 lostconn(0); 262 } while (*cp++ != '\n' && cp < &buf[BUFSIZ]); 263 *--cp = '\0'; 264 cp = buf; 265 n = 0; 266 while (*cp >= '0' && *cp <= '9') 267 n = (n * 10) + (*cp++ - '0'); 268 if (*cp == '\0' && n == VERSION) 269 return(1); 270 error("connection failed: version numbers don't match (local %d, remote %d)\n", VERSION, n); 271 } else { 272 error("connection failed: version numbers don't match\n"); 273 error("got unexpected input:"); 274 do { 275 error("%c", *cp); 276 } while (*cp != '\n' && read(rem, cp, 1) == 1); 277 } 278 closeconn(); 279 return(0); 280 } 281 282 /* 283 * Signal end of previous connection. 284 */ 285 static void 286 closeconn() 287 { 288 if (debug) 289 printf("closeconn()\n"); 290 291 if (rem >= 0) { 292 (void) write(rem, "\2\n", 2); 293 (void) close(rem); 294 rem = -1; 295 } 296 } 297 298 void 299 lostconn(signo) 300 int signo; 301 { 302 if (iamremote) 303 cleanup(0); 304 log(lfp, "rdist: lost connection\n"); 305 longjmp(env, 1); 306 } 307 308 static int 309 okname(name) 310 register char *name; 311 { 312 register char *cp = name; 313 register int c; 314 315 do { 316 c = *cp; 317 if (c & 0200) 318 goto bad; 319 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-') 320 goto bad; 321 cp++; 322 } while (*cp); 323 return(1); 324 bad: 325 error("invalid user name %s\n", name); 326 return(0); 327 } 328 329 time_t lastmod; 330 FILE *tfp; 331 extern char target[], *tp; 332 333 /* 334 * Process commands for comparing files to time stamp files. 335 */ 336 static void 337 dodcolon(filev, files, stamp, cmds) 338 char **filev; 339 struct namelist *files; 340 char *stamp; 341 struct subcmd *cmds; 342 { 343 register struct subcmd *sc; 344 register struct namelist *f; 345 register char **cpp; 346 struct timeval tv[2]; 347 struct timezone tz; 348 struct stat stb; 349 350 if (debug) 351 printf("dodcolon()\n"); 352 353 if (files == NULL) { 354 error("no files to be updated\n"); 355 return; 356 } 357 if (stat(stamp, &stb) < 0) { 358 error("%s: %s\n", stamp, strerror(errno)); 359 return; 360 } 361 if (debug) 362 printf("%s: %ld\n", stamp, stb.st_mtime); 363 364 subcmds = cmds; 365 lastmod = stb.st_mtime; 366 if (nflag || (options & VERIFY)) 367 tfp = NULL; 368 else { 369 if ((tfp = fopen(tempfile, "w")) == NULL) { 370 error("%s: %s\n", stamp, strerror(errno)); 371 return; 372 } 373 (void) gettimeofday(&tv[0], &tz); 374 tv[1] = tv[0]; 375 (void) utimes(stamp, tv); 376 } 377 378 for (f = files; f != NULL; f = f->n_next) { 379 if (filev) { 380 for (cpp = filev; *cpp; cpp++) 381 if (strcmp(f->n_name, *cpp) == 0) 382 goto found; 383 continue; 384 } 385 found: 386 tp = NULL; 387 cmptime(f->n_name); 388 } 389 390 if (tfp != NULL) 391 (void) fclose(tfp); 392 for (sc = cmds; sc != NULL; sc = sc->sc_next) 393 if (sc->sc_type == NOTIFY) 394 notify(tempfile, NULL, sc->sc_args, lastmod); 395 if (!nflag && !(options & VERIFY)) 396 (void) unlink(tempfile); 397 } 398 399 /* 400 * Compare the mtime of file to the list of time stamps. 401 */ 402 static void 403 cmptime(name) 404 char *name; 405 { 406 struct stat stb; 407 408 if (debug) 409 printf("cmptime(%s)\n", name); 410 411 if (except(name)) 412 return; 413 414 if (nflag) { 415 printf("comparing dates: %s\n", name); 416 return; 417 } 418 419 /* 420 * first time cmptime() is called? 421 */ 422 if (tp == NULL) { 423 if (exptilde(target, name) == NULL) 424 return; 425 tp = name = target; 426 while (*tp) 427 tp++; 428 } 429 if (access(name, 4) < 0 || stat(name, &stb) < 0) { 430 error("%s: %s\n", name, strerror(errno)); 431 return; 432 } 433 434 switch (stb.st_mode & S_IFMT) { 435 case S_IFREG: 436 break; 437 438 case S_IFDIR: 439 rcmptime(&stb); 440 return; 441 442 default: 443 error("%s: not a plain file\n", name); 444 return; 445 } 446 447 if (stb.st_mtime > lastmod) 448 log(tfp, "new: %s\n", name); 449 } 450 451 static void 452 rcmptime(st) 453 struct stat *st; 454 { 455 register DIR *d; 456 register struct direct *dp; 457 register char *cp; 458 char *otp; 459 int len; 460 461 if (debug) 462 printf("rcmptime(%x)\n", st); 463 464 if ((d = opendir(target)) == NULL) { 465 error("%s: %s\n", target, strerror(errno)); 466 return; 467 } 468 otp = tp; 469 len = tp - target; 470 while (dp = readdir(d)) { 471 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 472 continue; 473 if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) { 474 error("%s/%s: Name too long\n", target, dp->d_name); 475 continue; 476 } 477 tp = otp; 478 *tp++ = '/'; 479 cp = dp->d_name; 480 while (*tp++ = *cp++) 481 ; 482 tp--; 483 cmptime(target); 484 } 485 closedir(d); 486 tp = otp; 487 *tp = '\0'; 488 } 489 490 /* 491 * Notify the list of people the changes that were made. 492 * rhost == NULL if we are mailing a list of changes compared to at time 493 * stamp file. 494 */ 495 static void 496 notify(file, rhost, to, lmod) 497 char *file, *rhost; 498 register struct namelist *to; 499 time_t lmod; 500 { 501 register int fd, len; 502 struct stat stb; 503 FILE *pf; 504 505 if ((options & VERIFY) || to == NULL) 506 return; 507 if (!qflag) { 508 printf("notify "); 509 if (rhost) 510 printf("@%s ", rhost); 511 prnames(to); 512 } 513 if (nflag) 514 return; 515 516 if ((fd = open(file, 0)) < 0) { 517 error("%s: %s\n", file, strerror(errno)); 518 return; 519 } 520 if (fstat(fd, &stb) < 0) { 521 error("%s: %s\n", file, strerror(errno)); 522 (void) close(fd); 523 return; 524 } 525 if (stb.st_size == 0) { 526 (void) close(fd); 527 return; 528 } 529 /* 530 * Create a pipe to mailling program. 531 */ 532 (void)sprintf(buf, "%s -oi -t", _PATH_SENDMAIL); 533 pf = popen(buf, "w"); 534 if (pf == NULL) { 535 error("notify: \"%s\" failed\n", _PATH_SENDMAIL); 536 (void) close(fd); 537 return; 538 } 539 /* 540 * Output the proper header information. 541 */ 542 fprintf(pf, "From: rdist (Remote distribution program)\n"); 543 fprintf(pf, "To:"); 544 if (!any('@', to->n_name) && rhost != NULL) 545 fprintf(pf, " %s@%s", to->n_name, rhost); 546 else 547 fprintf(pf, " %s", to->n_name); 548 to = to->n_next; 549 while (to != NULL) { 550 if (!any('@', to->n_name) && rhost != NULL) 551 fprintf(pf, ", %s@%s", to->n_name, rhost); 552 else 553 fprintf(pf, ", %s", to->n_name); 554 to = to->n_next; 555 } 556 putc('\n', pf); 557 if (rhost != NULL) 558 fprintf(pf, "Subject: files updated by rdist from %s to %s\n", 559 host, rhost); 560 else 561 fprintf(pf, "Subject: files updated after %s\n", ctime(&lmod)); 562 putc('\n', pf); 563 564 while ((len = read(fd, buf, BUFSIZ)) > 0) 565 (void) fwrite(buf, 1, len, pf); 566 (void) close(fd); 567 (void) pclose(pf); 568 } 569 570 /* 571 * Return true if name is in the list. 572 */ 573 int 574 inlist(list, file) 575 struct namelist *list; 576 char *file; 577 { 578 register struct namelist *nl; 579 580 for (nl = list; nl != NULL; nl = nl->n_next) 581 if (!strcmp(file, nl->n_name)) 582 return(1); 583 return(0); 584 } 585 586 /* 587 * Return TRUE if file is in the exception list. 588 */ 589 int 590 except(file) 591 char *file; 592 { 593 register struct subcmd *sc; 594 register struct namelist *nl; 595 596 if (debug) 597 printf("except(%s)\n", file); 598 599 for (sc = subcmds; sc != NULL; sc = sc->sc_next) { 600 if (sc->sc_type != EXCEPT && sc->sc_type != PATTERN) 601 continue; 602 for (nl = sc->sc_args; nl != NULL; nl = nl->n_next) { 603 if (sc->sc_type == EXCEPT) { 604 if (!strcmp(file, nl->n_name)) 605 return(1); 606 continue; 607 } 608 re_comp(nl->n_name); 609 if (re_exec(file) > 0) 610 return(1); 611 } 612 } 613 return(0); 614 } 615 616 char * 617 colon(cp) 618 register char *cp; 619 { 620 621 while (*cp) { 622 if (*cp == ':') 623 return(cp); 624 if (*cp == '/') 625 return(0); 626 cp++; 627 } 628 return(0); 629 } 630