1 /* $OpenBSD: cvs.c,v 1.159 2017/06/01 08:08:24 joris Exp $ */ 2 /* 3 * Copyright (c) 2006, 2007 Joris Vink <joris@openbsd.org> 4 * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org> 5 * 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 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/stat.h> 29 30 #include <ctype.h> 31 #include <errno.h> 32 #include <pwd.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <time.h> 36 #include <unistd.h> 37 #include <err.h> 38 39 #include "cvs.h" 40 #include "remote.h" 41 #include "hash.h" 42 43 extern char *__progname; 44 45 /* verbosity level: 0 = really quiet, 1 = quiet, 2 = verbose */ 46 int verbosity = 2; 47 48 /* compression level used with zlib, 0 meaning no compression taking place */ 49 int cvs_compress = 0; 50 int cvs_readrc = 1; /* read .cvsrc on startup */ 51 int cvs_trace = 0; 52 int cvs_nolog = 0; 53 int cvs_readonly = 0; 54 int cvs_readonlyfs = 0; 55 int cvs_nocase = 0; /* set to 1 to disable filename case sensitivity */ 56 int cvs_noexec = 0; /* set to 1 to disable disk operations (-n option) */ 57 int cvs_cmdop; 58 int cvs_umask = CVS_UMASK_DEFAULT; 59 int cvs_server_active = 0; 60 61 char *cvs_tagname = NULL; 62 char *cvs_defargs; /* default global arguments from .cvsrc */ 63 char *cvs_rootstr; 64 char *cvs_rsh = CVS_RSH_DEFAULT; 65 char *cvs_editor = CVS_EDITOR_DEFAULT; 66 char *cvs_homedir = NULL; 67 char *cvs_tmpdir = CVS_TMPDIR_DEFAULT; 68 69 struct cvsroot *current_cvsroot = NULL; 70 struct cvs_cmd *cmdp; /* struct of command we are running */ 71 72 int cvs_getopt(int, char **); 73 __dead void usage(void); 74 static void cvs_read_rcfile(void); 75 76 struct wklhead temp_files; 77 78 void sighandler(int); 79 volatile sig_atomic_t cvs_quit = 0; 80 volatile sig_atomic_t sig_received = 0; 81 82 extern CVSENTRIES *current_list; 83 84 struct hash_table created_directories; 85 struct hash_table created_cvs_directories; 86 87 void 88 sighandler(int sig) 89 { 90 sig_received = sig; 91 92 switch (sig) { 93 case SIGINT: 94 case SIGTERM: 95 case SIGPIPE: 96 cvs_quit = 1; 97 break; 98 default: 99 break; 100 } 101 } 102 103 void 104 cvs_cleanup(void) 105 { 106 cvs_log(LP_TRACE, "cvs_cleanup: removing locks"); 107 worklist_run(&repo_locks, worklist_unlink); 108 109 cvs_log(LP_TRACE, "cvs_cleanup: removing temp files"); 110 worklist_run(&temp_files, worklist_unlink); 111 112 if (cvs_server_path != NULL) { 113 if (cvs_rmdir(cvs_server_path) == -1) 114 cvs_log(LP_ERR, 115 "warning: failed to remove server directory: %s", 116 cvs_server_path); 117 free(cvs_server_path); 118 cvs_server_path = NULL; 119 } 120 121 if (current_list != NULL) 122 cvs_ent_close(current_list, ENT_SYNC); 123 } 124 125 __dead void 126 usage(void) 127 { 128 (void)fprintf(stderr, 129 "usage: %s [-flnQqRrtvw] [-d root] [-e editor] [-s var=val]\n" 130 " [-T tmpdir] [-z level] command ...\n", __progname); 131 exit(1); 132 } 133 134 int 135 cvs_build_cmd(char ***cmd_argv, char **argv, int argc) 136 { 137 int cmd_argc, i, cur; 138 char *cp, *linebuf, *lp; 139 140 if (cmdp->cmd_defargs == NULL) { 141 *cmd_argv = argv; 142 return argc; 143 } 144 145 cur = argc + 2; 146 cmd_argc = 0; 147 *cmd_argv = xcalloc(cur, sizeof(char *)); 148 (*cmd_argv)[cmd_argc++] = argv[0]; 149 150 linebuf = xstrdup(cmdp->cmd_defargs); 151 for (lp = linebuf; lp != NULL;) { 152 cp = strsep(&lp, " \t\b\f\n\r\t\v"); 153 if (cp == NULL) 154 break; 155 if (*cp == '\0') 156 continue; 157 158 if (cmd_argc == cur) { 159 cur += 8; 160 *cmd_argv = xreallocarray(*cmd_argv, cur, 161 sizeof(char *)); 162 } 163 164 (*cmd_argv)[cmd_argc++] = cp; 165 } 166 167 if (cmd_argc + argc > cur) { 168 cur = cmd_argc + argc + 1; 169 *cmd_argv = xreallocarray(*cmd_argv, cur, 170 sizeof(char *)); 171 } 172 173 for (i = 1; i < argc; i++) 174 (*cmd_argv)[cmd_argc++] = argv[i]; 175 176 (*cmd_argv)[cmd_argc] = NULL; 177 178 return cmd_argc; 179 } 180 181 int 182 main(int argc, char **argv) 183 { 184 char *envstr, **cmd_argv, **targv; 185 int i, ret, cmd_argc; 186 struct passwd *pw; 187 struct stat st; 188 char fpath[PATH_MAX]; 189 190 if (pledge("stdio rpath wpath cpath fattr getpw proc exec", NULL) == -1) 191 err(1, "pledge"); 192 193 tzset(); 194 195 TAILQ_INIT(&cvs_variables); 196 SLIST_INIT(&repo_locks); 197 SLIST_INIT(&temp_files); 198 199 hash_table_init(&created_directories, 100); 200 hash_table_init(&created_cvs_directories, 100); 201 202 /* check environment so command-line options override it */ 203 if ((envstr = getenv("CVS_RSH")) != NULL) 204 cvs_rsh = envstr; 205 206 if (((envstr = getenv("CVSEDITOR")) != NULL) || 207 ((envstr = getenv("VISUAL")) != NULL) || 208 ((envstr = getenv("EDITOR")) != NULL)) 209 cvs_editor = envstr; 210 211 if ((envstr = getenv("CVSREAD")) != NULL) 212 cvs_readonly = 1; 213 214 if ((envstr = getenv("CVSREADONLYFS")) != NULL) { 215 cvs_readonlyfs = 1; 216 cvs_nolog = 1; 217 } 218 219 if ((cvs_homedir = getenv("HOME")) == NULL) { 220 if ((pw = getpwuid(getuid())) != NULL) 221 cvs_homedir = pw->pw_dir; 222 } 223 224 if ((envstr = getenv("TMPDIR")) != NULL) 225 cvs_tmpdir = envstr; 226 227 ret = cvs_getopt(argc, argv); 228 229 argc -= ret; 230 argv += ret; 231 if (argc == 0) 232 usage(); 233 234 cmdp = cvs_findcmd(argv[0]); 235 if (cmdp == NULL) { 236 fprintf(stderr, "Unknown command: `%s'\n\n", argv[0]); 237 fprintf(stderr, "CVS commands are:\n"); 238 for (i = 0; cvs_cdt[i] != NULL; i++) 239 fprintf(stderr, "\t%-16s%s\n", 240 cvs_cdt[i]->cmd_name, cvs_cdt[i]->cmd_descr); 241 exit(1); 242 } 243 244 /* 245 * check the tmp dir, either specified through 246 * the environment variable TMPDIR, or via 247 * the global option -T <dir> 248 */ 249 if (stat(cvs_tmpdir, &st) == -1) 250 fatal("stat failed on `%s': %s", cvs_tmpdir, strerror(errno)); 251 else if (!S_ISDIR(st.st_mode)) 252 fatal("`%s' is not valid temporary directory", cvs_tmpdir); 253 254 if (cvs_readrc == 1 && cvs_homedir != NULL) { 255 cvs_read_rcfile(); 256 257 if (cvs_defargs != NULL) { 258 if ((targv = cvs_makeargv(cvs_defargs, &i)) == NULL) 259 fatal("failed to load default arguments to %s", 260 __progname); 261 262 cvs_getopt(i, targv); 263 cvs_freeargv(targv, i); 264 free(targv); 265 } 266 } 267 268 /* setup signal handlers */ 269 signal(SIGTERM, sighandler); 270 signal(SIGINT, sighandler); 271 signal(SIGHUP, sighandler); 272 signal(SIGABRT, sighandler); 273 signal(SIGALRM, sighandler); 274 signal(SIGPIPE, sighandler); 275 276 cvs_cmdop = cmdp->cmd_op; 277 278 cmd_argc = cvs_build_cmd(&cmd_argv, argv, argc); 279 280 cvs_file_init(); 281 282 if (cvs_cmdop == CVS_OP_SERVER) { 283 cmdp->cmd(cmd_argc, cmd_argv); 284 cvs_cleanup(); 285 return (0); 286 } 287 288 cvs_umask = umask(0); 289 umask(cvs_umask); 290 291 if ((current_cvsroot = cvsroot_get(".")) == NULL) { 292 cvs_log(LP_ERR, 293 "No CVSROOT specified! Please use the '-d' option"); 294 fatal("or set the CVSROOT environment variable."); 295 } 296 297 if (cvsroot_is_remote()) { 298 cmdp->cmd(cmd_argc, cmd_argv); 299 cvs_cleanup(); 300 return (0); 301 } 302 303 (void)xsnprintf(fpath, sizeof(fpath), "%s/%s", 304 current_cvsroot->cr_dir, CVS_PATH_ROOT); 305 306 if (stat(fpath, &st) == -1 && cvs_cmdop != CVS_OP_INIT) { 307 if (errno == ENOENT) 308 fatal("repository '%s' does not exist", 309 current_cvsroot->cr_dir); 310 else 311 fatal("%s: %s", current_cvsroot->cr_dir, 312 strerror(errno)); 313 } else { 314 if (!S_ISDIR(st.st_mode)) 315 fatal("'%s' is not a directory", 316 current_cvsroot->cr_dir); 317 } 318 319 if (cvs_cmdop != CVS_OP_INIT) { 320 cvs_parse_configfile(); 321 cvs_parse_modules(); 322 } 323 324 cmdp->cmd(cmd_argc, cmd_argv); 325 cvs_cleanup(); 326 327 return (0); 328 } 329 330 int 331 cvs_getopt(int argc, char **argv) 332 { 333 int ret; 334 char *ep; 335 const char *errstr; 336 337 while ((ret = getopt(argc, argv, "b:d:e:flnQqRrs:T:tvwxz:")) != -1) { 338 switch (ret) { 339 case 'b': 340 /* 341 * We do not care about the bin directory for RCS files 342 * as this program has no dependencies on RCS programs, 343 * so it is only here for backwards compatibility. 344 */ 345 cvs_log(LP_NOTICE, "the -b argument is obsolete"); 346 break; 347 case 'd': 348 cvs_rootstr = optarg; 349 break; 350 case 'e': 351 cvs_editor = optarg; 352 break; 353 case 'f': 354 cvs_readrc = 0; 355 break; 356 case 'l': 357 cvs_nolog = 1; 358 break; 359 case 'n': 360 cvs_noexec = 1; 361 cvs_nolog = 1; 362 break; 363 case 'Q': 364 verbosity = 0; 365 break; 366 case 'q': 367 if (verbosity > 1) 368 verbosity = 1; 369 break; 370 case 'R': 371 cvs_readonlyfs = 1; 372 cvs_nolog = 1; 373 break; 374 case 'r': 375 cvs_readonly = 1; 376 break; 377 case 's': 378 ep = strchr(optarg, '='); 379 if (ep == NULL) { 380 cvs_log(LP_ERR, "no = in variable assignment"); 381 exit(1); 382 } 383 *(ep++) = '\0'; 384 if (cvs_var_set(optarg, ep) < 0) 385 exit(1); 386 break; 387 case 'T': 388 cvs_tmpdir = optarg; 389 break; 390 case 't': 391 cvs_trace = 1; 392 break; 393 case 'v': 394 printf("%s\n", CVS_VERSION); 395 exit(0); 396 /* NOTREACHED */ 397 case 'w': 398 cvs_readonly = 0; 399 break; 400 case 'x': 401 /* 402 * Kerberos encryption support, kept for compatibility 403 */ 404 break; 405 case 'z': 406 cvs_compress = strtonum(optarg, 0, 9, &errstr); 407 if (errstr != NULL) 408 fatal("cvs_compress: %s", errstr); 409 break; 410 default: 411 usage(); 412 /* NOTREACHED */ 413 } 414 } 415 416 ret = optind; 417 optind = 1; 418 optreset = 1; /* for next call */ 419 420 return (ret); 421 } 422 423 /* 424 * cvs_read_rcfile() 425 * 426 * Read the CVS `.cvsrc' file in the user's home directory. If the file 427 * exists, it should contain a list of arguments that should always be given 428 * implicitly to the specified commands. 429 */ 430 static void 431 cvs_read_rcfile(void) 432 { 433 char rcpath[PATH_MAX], *buf, *lbuf, *lp, *p; 434 int cmd_parsed, cvs_parsed, i, linenum; 435 size_t len, pos; 436 struct cvs_cmd *tcmdp; 437 FILE *fp; 438 439 linenum = 0; 440 441 i = snprintf(rcpath, PATH_MAX, "%s/%s", cvs_homedir, CVS_PATH_RC); 442 if (i < 0 || i >= PATH_MAX) { 443 cvs_log(LP_ERRNO, "%s", rcpath); 444 return; 445 } 446 447 fp = fopen(rcpath, "r"); 448 if (fp == NULL) { 449 if (errno != ENOENT) 450 cvs_log(LP_NOTICE, "failed to open `%s': %s", rcpath, 451 strerror(errno)); 452 return; 453 } 454 455 cmd_parsed = cvs_parsed = 0; 456 lbuf = NULL; 457 while ((buf = fgetln(fp, &len)) != NULL) { 458 if (buf[len - 1] == '\n') { 459 buf[len - 1] = '\0'; 460 } else { 461 lbuf = xmalloc(len + 1); 462 memcpy(lbuf, buf, len); 463 lbuf[len] = '\0'; 464 buf = lbuf; 465 } 466 467 linenum++; 468 469 /* skip any whitespaces */ 470 p = buf; 471 while (*p == ' ') 472 p++; 473 474 /* 475 * Allow comments. 476 * GNU cvs stops parsing a line if it encounters a \t 477 * in front of a command, stick at this behaviour for 478 * compatibility. 479 */ 480 if (*p == '#' || *p == '\t') 481 continue; 482 483 pos = strcspn(p, " \t"); 484 if (pos == strlen(p)) { 485 lp = NULL; 486 } else { 487 lp = p + pos; 488 *lp = '\0'; 489 } 490 491 if (strcmp(p, "cvs") == 0 && !cvs_parsed) { 492 /* 493 * Global default options. In the case of cvs only, 494 * we keep the 'cvs' string as first argument because 495 * getopt() does not like starting at index 0 for 496 * argument processing. 497 */ 498 if (lp != NULL) { 499 *lp = ' '; 500 cvs_defargs = xstrdup(p); 501 } 502 cvs_parsed = 1; 503 } else { 504 tcmdp = cvs_findcmd(p); 505 if (tcmdp == NULL && verbosity == 2) 506 cvs_log(LP_NOTICE, 507 "unknown command `%s' in `%s:%d'", 508 p, rcpath, linenum); 509 510 if (tcmdp != cmdp || cmd_parsed) 511 continue; 512 513 if (lp != NULL) { 514 lp++; 515 cmdp->cmd_defargs = xstrdup(lp); 516 } 517 cmd_parsed = 1; 518 } 519 } 520 free(lbuf); 521 522 if (ferror(fp)) { 523 cvs_log(LP_NOTICE, "failed to read line from `%s'", rcpath); 524 } 525 526 (void)fclose(fp); 527 } 528 529 /* 530 * cvs_var_set() 531 * 532 * Set the value of the variable <var> to <val>. If there is no such variable, 533 * a new entry is created, otherwise the old value is overwritten. 534 * Returns 0 on success, or -1 on failure. 535 */ 536 int 537 cvs_var_set(const char *var, const char *val) 538 { 539 const char *cp; 540 struct cvs_var *vp; 541 542 if (var == NULL || *var == '\0') { 543 cvs_log(LP_ERR, "no variable name"); 544 return (-1); 545 } 546 547 /* sanity check on the name */ 548 for (cp = var; *cp != '\0'; cp++) 549 if (!isalnum((unsigned char)*cp) && (*cp != '_')) { 550 cvs_log(LP_ERR, 551 "variable name `%s' contains invalid characters", 552 var); 553 return (-1); 554 } 555 556 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 557 if (strcmp(vp->cv_name, var) == 0) 558 break; 559 560 if (vp == NULL) { 561 vp = xcalloc(1, sizeof(*vp)); 562 563 vp->cv_name = xstrdup(var); 564 TAILQ_INSERT_TAIL(&cvs_variables, vp, cv_link); 565 566 } else /* free the previous value */ 567 free(vp->cv_val); 568 569 vp->cv_val = xstrdup(val); 570 571 return (0); 572 } 573 574 /* 575 * cvs_var_unset() 576 * 577 * Remove any entry for the variable <var>. 578 * Returns 0 on success, or -1 on failure. 579 */ 580 int 581 cvs_var_unset(const char *var) 582 { 583 struct cvs_var *vp; 584 585 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 586 if (strcmp(vp->cv_name, var) == 0) { 587 TAILQ_REMOVE(&cvs_variables, vp, cv_link); 588 free(vp->cv_name); 589 free(vp->cv_val); 590 free(vp); 591 return (0); 592 } 593 594 return (-1); 595 } 596 597 /* 598 * cvs_var_get() 599 * 600 * Get the value associated with the variable <var>. Returns a pointer to the 601 * value string on success, or NULL if the variable does not exist. 602 */ 603 604 const char * 605 cvs_var_get(const char *var) 606 { 607 struct cvs_var *vp; 608 609 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 610 if (strcmp(vp->cv_name, var) == 0) 611 return (vp->cv_val); 612 613 return (NULL); 614 } 615