cvs.c revision 1.112
1/* $OpenBSD: cvs.c,v 1.112 2006/12/11 10:53:00 xsa Exp $ */ 2/* 3 * Copyright (c) 2006 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 "includes.h" 29 30#include "cvs.h" 31#include "config.h" 32#include "log.h" 33#include "file.h" 34#include "remote.h" 35 36extern char *__progname; 37 38/* verbosity level: 0 = really quiet, 1 = quiet, 2 = verbose */ 39int verbosity = 1; 40 41/* compression level used with zlib, 0 meaning no compression taking place */ 42int cvs_compress = 0; 43int cvs_readrc = 1; /* read .cvsrc on startup */ 44int cvs_trace = 0; 45int cvs_nolog = 0; 46int cvs_readonly = 0; 47int cvs_readonlyfs = 0; 48int cvs_nocase = 0; /* set to 1 to disable filename case sensitivity */ 49int cvs_noexec = 0; /* set to 1 to disable disk operations (-n option) */ 50int cvs_error = -1; /* set to the correct error code on failure */ 51int cvs_cmdop; 52int cvs_umask = CVS_UMASK_DEFAULT; 53int cvs_server_active = 0; 54 55char *cvs_tagname = NULL; 56char *cvs_defargs; /* default global arguments from .cvsrc */ 57char *cvs_command; /* name of the command we are running */ 58char *cvs_rootstr; 59char *cvs_rsh = CVS_RSH_DEFAULT; 60char *cvs_editor = CVS_EDITOR_DEFAULT; 61char *cvs_homedir = NULL; 62char *cvs_msg = NULL; 63char *cvs_tmpdir = CVS_TMPDIR_DEFAULT; 64 65struct cvsroot *current_cvsroot = NULL; 66 67int cvs_getopt(int, char **); 68void usage(void); 69static void cvs_read_rcfile(void); 70 71struct cvs_wklhead temp_files; 72 73void sighandler(int); 74volatile sig_atomic_t cvs_quit = 0; 75volatile sig_atomic_t sig_received = 0; 76 77void 78sighandler(int sig) 79{ 80 sig_received = sig; 81 82 switch (sig) { 83 case SIGINT: 84 case SIGTERM: 85 case SIGPIPE: 86 cvs_quit = 1; 87 break; 88 default: 89 break; 90 } 91} 92 93void 94cvs_cleanup(void) 95{ 96 cvs_log(LP_TRACE, "cvs_cleanup: removing locks"); 97 cvs_worklist_run(&repo_locks, cvs_worklist_unlink); 98 99 cvs_log(LP_TRACE, "cvs_cleanup: removing temp files"); 100 cvs_worklist_run(&temp_files, cvs_worklist_unlink); 101 102 if (cvs_server_active) { 103 if (cvs_rmdir(cvs_server_path) == -1) 104 cvs_log(LP_ERR, 105 "warning: failed to remove server directory: %s", 106 cvs_server_path); 107 xfree(cvs_server_path); 108 } 109} 110 111void 112usage(void) 113{ 114 fprintf(stderr, 115 "Usage: %s [-flnQqRrtvVw] [-d root] [-e editor] [-s var=val] " 116 "[-T tmpdir] [-z level] command [...]\n", __progname); 117} 118 119int 120main(int argc, char **argv) 121{ 122 char *envstr, *cmd_argv[CVS_CMD_MAXARG], **targv; 123 int i, ret, cmd_argc; 124 struct cvs_cmd *cmdp; 125 struct passwd *pw; 126 struct stat st; 127 char fpath[MAXPATHLEN]; 128 char *root, *rootp; 129 130 tzset(); 131 132 TAILQ_INIT(&cvs_variables); 133 SLIST_INIT(&repo_locks); 134 SLIST_INIT(&temp_files); 135 136 /* check environment so command-line options override it */ 137 if ((envstr = getenv("CVS_RSH")) != NULL) 138 cvs_rsh = envstr; 139 140 if (((envstr = getenv("CVSEDITOR")) != NULL) || 141 ((envstr = getenv("VISUAL")) != NULL) || 142 ((envstr = getenv("EDITOR")) != NULL)) 143 cvs_editor = envstr; 144 145 if ((envstr = getenv("CVSREAD")) != NULL) 146 cvs_readonly = 1; 147 148 if ((envstr = getenv("CVSREADONLYFS")) != NULL) { 149 cvs_readonlyfs = 1; 150 cvs_nolog = 1; 151 } 152 153 if ((cvs_homedir = getenv("HOME")) == NULL) { 154 if ((pw = getpwuid(getuid())) == NULL) 155 fatal("getpwuid failed"); 156 cvs_homedir = pw->pw_dir; 157 } 158 159 if ((envstr = getenv("TMPDIR")) != NULL) 160 cvs_tmpdir = envstr; 161 162 ret = cvs_getopt(argc, argv); 163 164 argc -= ret; 165 argv += ret; 166 if (argc == 0) { 167 usage(); 168 exit(1); 169 } 170 171 cvs_command = argv[0]; 172 173 /* 174 * check the tmp dir, either specified through 175 * the environment variable TMPDIR, or via 176 * the global option -T <dir> 177 */ 178 if (stat(cvs_tmpdir, &st) == -1) 179 fatal("stat failed on `%s': %s", cvs_tmpdir, strerror(errno)); 180 else if (!S_ISDIR(st.st_mode)) 181 fatal("`%s' is not valid temporary directory", cvs_tmpdir); 182 183 if (cvs_readrc == 1) { 184 cvs_read_rcfile(); 185 186 if (cvs_defargs != NULL) { 187 if ((targv = cvs_makeargv(cvs_defargs, &i)) == NULL) 188 fatal("failed to load default arguments to %s", 189 __progname); 190 191 cvs_getopt(i, targv); 192 cvs_freeargv(targv, i); 193 xfree(targv); 194 } 195 } 196 197 /* setup signal handlers */ 198 signal(SIGTERM, sighandler); 199 signal(SIGINT, sighandler); 200 signal(SIGHUP, sighandler); 201 signal(SIGABRT, sighandler); 202 signal(SIGALRM, sighandler); 203 signal(SIGPIPE, sighandler); 204 205 cmdp = cvs_findcmd(cvs_command); 206 if (cmdp == NULL) { 207 fprintf(stderr, "Unknown command: `%s'\n\n", cvs_command); 208 fprintf(stderr, "CVS commands are:\n"); 209 for (i = 0; cvs_cdt[i] != NULL; i++) 210 fprintf(stderr, "\t%-16s%s\n", 211 cvs_cdt[i]->cmd_name, cvs_cdt[i]->cmd_descr); 212 exit(1); 213 } 214 215 cvs_cmdop = cmdp->cmd_op; 216 217 cmd_argc = 0; 218 memset(cmd_argv, 0, sizeof(cmd_argv)); 219 220 cmd_argv[cmd_argc++] = argv[0]; 221 if (cmdp->cmd_defargs != NULL) { 222 /* transform into a new argument vector */ 223 ret = cvs_getargv(cmdp->cmd_defargs, cmd_argv + 1, 224 CVS_CMD_MAXARG - 1); 225 if (ret < 0) 226 fatal("main: cvs_getargv failed"); 227 228 cmd_argc += ret; 229 } 230 231 for (ret = 1; ret < argc; ret++) 232 cmd_argv[cmd_argc++] = argv[ret]; 233 234 cvs_file_init(); 235 236 if (cvs_cmdop == CVS_OP_SERVER) { 237 setvbuf(stdin, NULL, _IOLBF, 0); 238 setvbuf(stdout, NULL, _IOLBF, 0); 239 240 cvs_server_active = 1; 241 root = cvs_remote_input(); 242 if ((rootp = strchr(root, ' ')) == NULL) 243 fatal("bad Root request"); 244 cvs_rootstr = xstrdup(rootp + 1); 245 xfree(root); 246 } 247 248 if ((current_cvsroot = cvsroot_get(".")) == NULL) { 249 cvs_log(LP_ERR, 250 "No CVSROOT specified! Please use the '-d' option"); 251 fatal("or set the CVSROOT environment variable."); 252 } 253 254 if (current_cvsroot->cr_method != CVS_METHOD_LOCAL) { 255 if (cvs_server_active == 1) 256 fatal("remote Root while already running as server?"); 257 258 cvs_client_connect_to_server(); 259 cmdp->cmd(cmd_argc, cmd_argv); 260 cvs_cleanup(); 261 return (0); 262 } 263 264 if (cvs_path_cat(current_cvsroot->cr_dir, CVS_PATH_ROOT, 265 fpath, sizeof(fpath)) >= sizeof(fpath)) 266 fatal("main: truncation"); 267 268 if (stat(fpath, &st) == -1 && cvs_cmdop != CVS_OP_INIT) { 269 if (errno == ENOENT) 270 fatal("repository '%s' does not exist", 271 current_cvsroot->cr_dir); 272 else 273 fatal("%s: %s", current_cvsroot->cr_dir, 274 strerror(errno)); 275 } else { 276 if (!S_ISDIR(st.st_mode)) 277 fatal("'%s' is not a directory", 278 current_cvsroot->cr_dir); 279 } 280 281 if (cvs_cmdop != CVS_OP_INIT) 282 cvs_parse_configfile(); 283 284 umask(cvs_umask); 285 286 cmdp->cmd(cmd_argc, cmd_argv); 287 cvs_cleanup(); 288 289 return (0); 290} 291 292int 293cvs_getopt(int argc, char **argv) 294{ 295 int ret; 296 char *ep; 297 298 while ((ret = getopt(argc, argv, "b:d:e:fHlnQqRrs:T:tvVwz:")) != -1) { 299 switch (ret) { 300 case 'b': 301 /* 302 * We do not care about the bin directory for RCS files 303 * as this program has no dependencies on RCS programs, 304 * so it is only here for backwards compatibility. 305 */ 306 cvs_log(LP_NOTICE, "the -b argument is obsolete"); 307 break; 308 case 'd': 309 cvs_rootstr = optarg; 310 break; 311 case 'e': 312 cvs_editor = optarg; 313 break; 314 case 'f': 315 cvs_readrc = 0; 316 break; 317 case 'l': 318 cvs_nolog = 1; 319 break; 320 case 'n': 321 cvs_noexec = 1; 322 cvs_nolog = 1; 323 break; 324 case 'Q': 325 verbosity = 0; 326 break; 327 case 'q': 328 /* 329 * Be quiet. This is the default in OpenCVS. 330 */ 331 break; 332 case 'R': 333 cvs_readonlyfs = 1; 334 cvs_nolog = 1; 335 break; 336 case 'r': 337 cvs_readonly = 1; 338 break; 339 case 's': 340 ep = strchr(optarg, '='); 341 if (ep == NULL) { 342 cvs_log(LP_ERR, "no = in variable assignment"); 343 exit(1); 344 } 345 *(ep++) = '\0'; 346 if (cvs_var_set(optarg, ep) < 0) 347 exit(1); 348 break; 349 case 'T': 350 cvs_tmpdir = optarg; 351 break; 352 case 't': 353 cvs_trace = 1; 354 break; 355 case 'V': 356 /* don't override -Q */ 357 if (verbosity) 358 verbosity = 2; 359 break; 360 case 'v': 361 printf("%s\n", CVS_VERSION); 362 exit(0); 363 /* NOTREACHED */ 364 break; 365 case 'w': 366 cvs_readonly = 0; 367 break; 368 case 'x': 369 /* 370 * Kerberos encryption support, kept for compatibility 371 */ 372 break; 373 case 'z': 374 cvs_compress = (int)strtol(optarg, &ep, 10); 375 if (*ep != '\0') 376 fatal("error parsing compression level"); 377 if (cvs_compress < 0 || cvs_compress > 9) 378 fatal("gzip compression level must be " 379 "between 0 and 9"); 380 break; 381 default: 382 usage(); 383 exit(1); 384 } 385 } 386 387 ret = optind; 388 optind = 1; 389 optreset = 1; /* for next call */ 390 391 return (ret); 392} 393 394/* 395 * cvs_read_rcfile() 396 * 397 * Read the CVS `.cvsrc' file in the user's home directory. If the file 398 * exists, it should contain a list of arguments that should always be given 399 * implicitly to the specified commands. 400 */ 401static void 402cvs_read_rcfile(void) 403{ 404 char rcpath[MAXPATHLEN], linebuf[128], *lp, *p; 405 int linenum = 0; 406 size_t len; 407 struct cvs_cmd *cmdp; 408 FILE *fp; 409 410 if (cvs_path_cat(cvs_homedir, CVS_PATH_RC, rcpath, sizeof(rcpath)) 411 >= sizeof(rcpath)) { 412 cvs_log(LP_ERRNO, "%s", rcpath); 413 return; 414 } 415 416 fp = fopen(rcpath, "r"); 417 if (fp == NULL) { 418 if (errno != ENOENT) 419 cvs_log(LP_NOTICE, "failed to open `%s': %s", rcpath, 420 strerror(errno)); 421 return; 422 } 423 424 while (fgets(linebuf, (int)sizeof(linebuf), fp) != NULL) { 425 linenum++; 426 if ((len = strlen(linebuf)) == 0) 427 continue; 428 if (linebuf[len - 1] != '\n') { 429 cvs_log(LP_ERR, "line too long in `%s:%d'", rcpath, 430 linenum); 431 break; 432 } 433 linebuf[--len] = '\0'; 434 435 /* skip any whitespaces */ 436 p = linebuf; 437 while (*p == ' ') 438 p++; 439 440 /* allow comments */ 441 if (*p == '#') 442 continue; 443 444 lp = strchr(p, ' '); 445 if (lp == NULL) 446 continue; /* ignore lines with no arguments */ 447 *lp = '\0'; 448 if (strcmp(p, "cvs") == 0) { 449 /* 450 * Global default options. In the case of cvs only, 451 * we keep the 'cvs' string as first argument because 452 * getopt() does not like starting at index 0 for 453 * argument processing. 454 */ 455 *lp = ' '; 456 cvs_defargs = xstrdup(p); 457 } else { 458 lp++; 459 cmdp = cvs_findcmd(p); 460 if (cmdp == NULL) { 461 cvs_log(LP_NOTICE, 462 "unknown command `%s' in `%s:%d'", 463 p, rcpath, linenum); 464 continue; 465 } 466 467 cmdp->cmd_defargs = xstrdup(lp); 468 } 469 } 470 471 if (ferror(fp)) { 472 cvs_log(LP_NOTICE, "failed to read line from `%s'", rcpath); 473 } 474 475 (void)fclose(fp); 476} 477 478/* 479 * cvs_var_set() 480 * 481 * Set the value of the variable <var> to <val>. If there is no such variable, 482 * a new entry is created, otherwise the old value is overwritten. 483 * Returns 0 on success, or -1 on failure. 484 */ 485int 486cvs_var_set(const char *var, const char *val) 487{ 488 char *valcp; 489 const char *cp; 490 struct cvs_var *vp; 491 492 if (var == NULL || *var == '\0') { 493 cvs_log(LP_ERR, "no variable name"); 494 return (-1); 495 } 496 497 /* sanity check on the name */ 498 for (cp = var; *cp != '\0'; cp++) 499 if (!isalnum(*cp) && (*cp != '_')) { 500 cvs_log(LP_ERR, 501 "variable name `%s' contains invalid characters", 502 var); 503 return (-1); 504 } 505 506 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 507 if (strcmp(vp->cv_name, var) == 0) 508 break; 509 510 valcp = xstrdup(val); 511 if (vp == NULL) { 512 vp = xcalloc(1, sizeof(*vp)); 513 514 vp->cv_name = xstrdup(var); 515 TAILQ_INSERT_TAIL(&cvs_variables, vp, cv_link); 516 517 } else /* free the previous value */ 518 xfree(vp->cv_val); 519 520 vp->cv_val = valcp; 521 522 return (0); 523} 524 525/* 526 * cvs_var_set() 527 * 528 * Remove any entry for the variable <var>. 529 * Returns 0 on success, or -1 on failure. 530 */ 531int 532cvs_var_unset(const char *var) 533{ 534 struct cvs_var *vp; 535 536 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 537 if (strcmp(vp->cv_name, var) == 0) { 538 TAILQ_REMOVE(&cvs_variables, vp, cv_link); 539 xfree(vp->cv_name); 540 xfree(vp->cv_val); 541 xfree(vp); 542 return (0); 543 } 544 545 return (-1); 546} 547 548/* 549 * cvs_var_get() 550 * 551 * Get the value associated with the variable <var>. Returns a pointer to the 552 * value string on success, or NULL if the variable does not exist. 553 */ 554 555const char * 556cvs_var_get(const char *var) 557{ 558 struct cvs_var *vp; 559 560 TAILQ_FOREACH(vp, &cvs_variables, cv_link) 561 if (strcmp(vp->cv_name, var) == 0) 562 return (vp->cv_val); 563 564 return (NULL); 565} 566