| File: | src/usr.bin/cvs/cvs.c |
| Warning: | line 213, column 7 Although the value stored to 'envstr' is used in the enclosing expression, the value is never actually read from 'envstr' |
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| 1 | /* $OpenBSD: cvs.c,v 1.160 2021/01/27 07:18:16 deraadt 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(*__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_DEFAULT002; |
| 59 | int cvs_server_active = 0; |
| 60 | |
| 61 | char *cvs_tagname = NULL((void *)0); |
| 62 | char *cvs_defargs; /* default global arguments from .cvsrc */ |
| 63 | char *cvs_rootstr; |
| 64 | char *cvs_rsh = CVS_RSH_DEFAULT"ssh"; |
| 65 | char *cvs_editor = CVS_EDITOR_DEFAULT"vi"; |
| 66 | char *cvs_homedir = NULL((void *)0); |
| 67 | char *cvs_tmpdir = CVS_TMPDIR_DEFAULT"/tmp"; |
| 68 | |
| 69 | struct cvsroot *current_cvsroot = NULL((void *)0); |
| 70 | struct cvs_cmd *cmdp; /* struct of command we are running */ |
| 71 | |
| 72 | int cvs_getopt(int, char **); |
| 73 | __dead__attribute__((__noreturn__)) void usage(void); |
| 74 | static void cvs_read_rcfile(void); |
| 75 | |
| 76 | struct cvs_varhead cvs_variables; |
| 77 | |
| 78 | struct wklhead temp_files; |
| 79 | |
| 80 | void sighandler(int); |
| 81 | volatile sig_atomic_t cvs_quit = 0; |
| 82 | volatile sig_atomic_t sig_received = 0; |
| 83 | |
| 84 | extern CVSENTRIES *current_list; |
| 85 | |
| 86 | struct hash_table created_directories; |
| 87 | struct hash_table created_cvs_directories; |
| 88 | |
| 89 | void |
| 90 | sighandler(int sig) |
| 91 | { |
| 92 | sig_received = sig; |
| 93 | |
| 94 | switch (sig) { |
| 95 | case SIGINT2: |
| 96 | case SIGTERM15: |
| 97 | case SIGPIPE13: |
| 98 | cvs_quit = 1; |
| 99 | break; |
| 100 | default: |
| 101 | break; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | void |
| 106 | cvs_cleanup(void) |
| 107 | { |
| 108 | cvs_log(LP_TRACE4, "cvs_cleanup: removing locks"); |
| 109 | worklist_run(&repo_locks, worklist_unlink); |
| 110 | |
| 111 | cvs_log(LP_TRACE4, "cvs_cleanup: removing temp files"); |
| 112 | worklist_run(&temp_files, worklist_unlink); |
| 113 | |
| 114 | if (cvs_server_path != NULL((void *)0)) { |
| 115 | if (cvs_rmdir(cvs_server_path) == -1) |
| 116 | cvs_log(LP_ERR1, |
| 117 | "warning: failed to remove server directory: %s", |
| 118 | cvs_server_path); |
| 119 | free(cvs_server_path); |
| 120 | cvs_server_path = NULL((void *)0); |
| 121 | } |
| 122 | |
| 123 | if (current_list != NULL((void *)0)) |
| 124 | cvs_ent_close(current_list, ENT_SYNC1); |
| 125 | } |
| 126 | |
| 127 | __dead__attribute__((__noreturn__)) void |
| 128 | usage(void) |
| 129 | { |
| 130 | (void)fprintf(stderr(&__sF[2]), |
| 131 | "usage: %s [-flnQqRrtvw] [-d root] [-e editor] [-s var=val]\n" |
| 132 | " [-T tmpdir] [-z level] command ...\n", __progname); |
| 133 | exit(1); |
| 134 | } |
| 135 | |
| 136 | int |
| 137 | cvs_build_cmd(char ***cmd_argv, char **argv, int argc) |
| 138 | { |
| 139 | int cmd_argc, i, cur; |
| 140 | char *cp, *linebuf, *lp; |
| 141 | |
| 142 | if (cmdp->cmd_defargs == NULL((void *)0)) { |
| 143 | *cmd_argv = argv; |
| 144 | return argc; |
| 145 | } |
| 146 | |
| 147 | cur = argc + 2; |
| 148 | cmd_argc = 0; |
| 149 | *cmd_argv = xcalloc(cur, sizeof(char *)); |
| 150 | (*cmd_argv)[cmd_argc++] = argv[0]; |
| 151 | |
| 152 | linebuf = xstrdup(cmdp->cmd_defargs); |
| 153 | for (lp = linebuf; lp != NULL((void *)0);) { |
| 154 | cp = strsep(&lp, " \t\b\f\n\r\t\v"); |
| 155 | if (cp == NULL((void *)0)) |
| 156 | break; |
| 157 | if (*cp == '\0') |
| 158 | continue; |
| 159 | |
| 160 | if (cmd_argc == cur) { |
| 161 | cur += 8; |
| 162 | *cmd_argv = xreallocarray(*cmd_argv, cur, |
| 163 | sizeof(char *)); |
| 164 | } |
| 165 | |
| 166 | (*cmd_argv)[cmd_argc++] = cp; |
| 167 | } |
| 168 | |
| 169 | if (cmd_argc + argc > cur) { |
| 170 | cur = cmd_argc + argc + 1; |
| 171 | *cmd_argv = xreallocarray(*cmd_argv, cur, |
| 172 | sizeof(char *)); |
| 173 | } |
| 174 | |
| 175 | for (i = 1; i < argc; i++) |
| 176 | (*cmd_argv)[cmd_argc++] = argv[i]; |
| 177 | |
| 178 | (*cmd_argv)[cmd_argc] = NULL((void *)0); |
| 179 | |
| 180 | return cmd_argc; |
| 181 | } |
| 182 | |
| 183 | int |
| 184 | main(int argc, char **argv) |
| 185 | { |
| 186 | char *envstr, **cmd_argv, **targv; |
| 187 | int i, ret, cmd_argc; |
| 188 | struct passwd *pw; |
| 189 | struct stat st; |
| 190 | char fpath[PATH_MAX1024]; |
| 191 | |
| 192 | if (pledge("stdio rpath wpath cpath fattr getpw proc exec", NULL((void *)0)) == -1) |
| 193 | err(1, "pledge"); |
| 194 | |
| 195 | tzset(); |
| 196 | |
| 197 | TAILQ_INIT(&cvs_variables)do { (&cvs_variables)->tqh_first = ((void *)0); (& cvs_variables)->tqh_last = &(&cvs_variables)->tqh_first ; } while (0); |
| 198 | SLIST_INIT(&repo_locks){ ((&repo_locks)->slh_first) = ((void *)0); }; |
| 199 | SLIST_INIT(&temp_files){ ((&temp_files)->slh_first) = ((void *)0); }; |
| 200 | |
| 201 | hash_table_init(&created_directories, 100); |
| 202 | hash_table_init(&created_cvs_directories, 100); |
| 203 | |
| 204 | /* check environment so command-line options override it */ |
| 205 | if ((envstr = getenv("CVS_RSH")) != NULL((void *)0)) |
| 206 | cvs_rsh = envstr; |
| 207 | |
| 208 | if (((envstr = getenv("CVSEDITOR")) != NULL((void *)0)) || |
| 209 | ((envstr = getenv("VISUAL")) != NULL((void *)0)) || |
| 210 | ((envstr = getenv("EDITOR")) != NULL((void *)0))) |
| 211 | cvs_editor = envstr; |
| 212 | |
| 213 | if ((envstr = getenv("CVSREAD")) != NULL((void *)0)) |
Although the value stored to 'envstr' is used in the enclosing expression, the value is never actually read from 'envstr' | |
| 214 | cvs_readonly = 1; |
| 215 | |
| 216 | if ((envstr = getenv("CVSREADONLYFS")) != NULL((void *)0)) { |
| 217 | cvs_readonlyfs = 1; |
| 218 | cvs_nolog = 1; |
| 219 | } |
| 220 | |
| 221 | if ((cvs_homedir = getenv("HOME")) == NULL((void *)0)) { |
| 222 | if ((pw = getpwuid(getuid())) != NULL((void *)0)) |
| 223 | cvs_homedir = pw->pw_dir; |
| 224 | } |
| 225 | |
| 226 | if ((envstr = getenv("TMPDIR")) != NULL((void *)0)) |
| 227 | cvs_tmpdir = envstr; |
| 228 | |
| 229 | ret = cvs_getopt(argc, argv); |
| 230 | |
| 231 | argc -= ret; |
| 232 | argv += ret; |
| 233 | if (argc == 0) |
| 234 | usage(); |
| 235 | |
| 236 | cmdp = cvs_findcmd(argv[0]); |
| 237 | if (cmdp == NULL((void *)0)) { |
| 238 | fprintf(stderr(&__sF[2]), "Unknown command: `%s'\n\n", argv[0]); |
| 239 | fprintf(stderr(&__sF[2]), "CVS commands are:\n"); |
| 240 | for (i = 0; cvs_cdt[i] != NULL((void *)0); i++) |
| 241 | fprintf(stderr(&__sF[2]), "\t%-16s%s\n", |
| 242 | cvs_cdt[i]->cmd_name, cvs_cdt[i]->cmd_descr); |
| 243 | exit(1); |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * check the tmp dir, either specified through |
| 248 | * the environment variable TMPDIR, or via |
| 249 | * the global option -T <dir> |
| 250 | */ |
| 251 | if (stat(cvs_tmpdir, &st) == -1) |
| 252 | fatal("stat failed on `%s': %s", cvs_tmpdir, strerror(errno(*__errno()))); |
| 253 | else if (!S_ISDIR(st.st_mode)((st.st_mode & 0170000) == 0040000)) |
| 254 | fatal("`%s' is not valid temporary directory", cvs_tmpdir); |
| 255 | |
| 256 | if (cvs_readrc == 1 && cvs_homedir != NULL((void *)0)) { |
| 257 | cvs_read_rcfile(); |
| 258 | |
| 259 | if (cvs_defargs != NULL((void *)0)) { |
| 260 | if ((targv = cvs_makeargv(cvs_defargs, &i)) == NULL((void *)0)) |
| 261 | fatal("failed to load default arguments to %s", |
| 262 | __progname); |
| 263 | |
| 264 | cvs_getopt(i, targv); |
| 265 | cvs_freeargv(targv, i); |
| 266 | free(targv); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /* setup signal handlers */ |
| 271 | signal(SIGTERM15, sighandler); |
| 272 | signal(SIGINT2, sighandler); |
| 273 | signal(SIGHUP1, sighandler); |
| 274 | signal(SIGABRT6, sighandler); |
| 275 | signal(SIGALRM14, sighandler); |
| 276 | signal(SIGPIPE13, sighandler); |
| 277 | |
| 278 | cvs_cmdop = cmdp->cmd_op; |
| 279 | |
| 280 | cmd_argc = cvs_build_cmd(&cmd_argv, argv, argc); |
| 281 | |
| 282 | cvs_file_init(); |
| 283 | |
| 284 | if (cvs_cmdop == CVS_OP_SERVER20) { |
| 285 | cmdp->cmd(cmd_argc, cmd_argv); |
| 286 | cvs_cleanup(); |
| 287 | return (0); |
| 288 | } |
| 289 | |
| 290 | cvs_umask = umask(0); |
| 291 | umask(cvs_umask); |
| 292 | |
| 293 | if ((current_cvsroot = cvsroot_get(".")) == NULL((void *)0)) { |
| 294 | cvs_log(LP_ERR1, |
| 295 | "No CVSROOT specified! Please use the '-d' option"); |
| 296 | fatal("or set the CVSROOT environment variable."); |
| 297 | } |
| 298 | |
| 299 | if (cvsroot_is_remote()) { |
| 300 | cmdp->cmd(cmd_argc, cmd_argv); |
| 301 | cvs_cleanup(); |
| 302 | return (0); |
| 303 | } |
| 304 | |
| 305 | (void)xsnprintf(fpath, sizeof(fpath), "%s/%s", |
| 306 | current_cvsroot->cr_dir, CVS_PATH_ROOT"CVSROOT"); |
| 307 | |
| 308 | if (stat(fpath, &st) == -1 && cvs_cmdop != CVS_OP_INIT12) { |
| 309 | if (errno(*__errno()) == ENOENT2) |
| 310 | fatal("repository '%s' does not exist", |
| 311 | current_cvsroot->cr_dir); |
| 312 | else |
| 313 | fatal("%s: %s", current_cvsroot->cr_dir, |
| 314 | strerror(errno(*__errno()))); |
| 315 | } else { |
| 316 | if (!S_ISDIR(st.st_mode)((st.st_mode & 0170000) == 0040000)) |
| 317 | fatal("'%s' is not a directory", |
| 318 | current_cvsroot->cr_dir); |
| 319 | } |
| 320 | |
| 321 | if (cvs_cmdop != CVS_OP_INIT12) { |
| 322 | cvs_parse_configfile(); |
| 323 | cvs_parse_modules(); |
| 324 | } |
| 325 | |
| 326 | cmdp->cmd(cmd_argc, cmd_argv); |
| 327 | cvs_cleanup(); |
| 328 | |
| 329 | return (0); |
| 330 | } |
| 331 | |
| 332 | int |
| 333 | cvs_getopt(int argc, char **argv) |
| 334 | { |
| 335 | int ret; |
| 336 | char *ep; |
| 337 | const char *errstr; |
| 338 | |
| 339 | while ((ret = getopt(argc, argv, "b:d:e:flnQqRrs:T:tvwxz:")) != -1) { |
| 340 | switch (ret) { |
| 341 | case 'b': |
| 342 | /* |
| 343 | * We do not care about the bin directory for RCS files |
| 344 | * as this program has no dependencies on RCS programs, |
| 345 | * so it is only here for backwards compatibility. |
| 346 | */ |
| 347 | cvs_log(LP_NOTICE0, "the -b argument is obsolete"); |
| 348 | break; |
| 349 | case 'd': |
| 350 | cvs_rootstr = optarg; |
| 351 | break; |
| 352 | case 'e': |
| 353 | cvs_editor = optarg; |
| 354 | break; |
| 355 | case 'f': |
| 356 | cvs_readrc = 0; |
| 357 | break; |
| 358 | case 'l': |
| 359 | cvs_nolog = 1; |
| 360 | break; |
| 361 | case 'n': |
| 362 | cvs_noexec = 1; |
| 363 | cvs_nolog = 1; |
| 364 | break; |
| 365 | case 'Q': |
| 366 | verbosity = 0; |
| 367 | break; |
| 368 | case 'q': |
| 369 | if (verbosity > 1) |
| 370 | verbosity = 1; |
| 371 | break; |
| 372 | case 'R': |
| 373 | cvs_readonlyfs = 1; |
| 374 | cvs_nolog = 1; |
| 375 | break; |
| 376 | case 'r': |
| 377 | cvs_readonly = 1; |
| 378 | break; |
| 379 | case 's': |
| 380 | ep = strchr(optarg, '='); |
| 381 | if (ep == NULL((void *)0)) { |
| 382 | cvs_log(LP_ERR1, "no = in variable assignment"); |
| 383 | exit(1); |
| 384 | } |
| 385 | *(ep++) = '\0'; |
| 386 | if (cvs_var_set(optarg, ep) < 0) |
| 387 | exit(1); |
| 388 | break; |
| 389 | case 'T': |
| 390 | cvs_tmpdir = optarg; |
| 391 | break; |
| 392 | case 't': |
| 393 | cvs_trace = 1; |
| 394 | break; |
| 395 | case 'v': |
| 396 | printf("%s\n", CVS_VERSION"OpenCVS 4.5"); |
| 397 | exit(0); |
| 398 | /* NOTREACHED */ |
| 399 | case 'w': |
| 400 | cvs_readonly = 0; |
| 401 | break; |
| 402 | case 'x': |
| 403 | /* |
| 404 | * Kerberos encryption support, kept for compatibility |
| 405 | */ |
| 406 | break; |
| 407 | case 'z': |
| 408 | cvs_compress = strtonum(optarg, 0, 9, &errstr); |
| 409 | if (errstr != NULL((void *)0)) |
| 410 | fatal("cvs_compress: %s", errstr); |
| 411 | break; |
| 412 | default: |
| 413 | usage(); |
| 414 | /* NOTREACHED */ |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | ret = optind; |
| 419 | optind = 1; |
| 420 | optreset = 1; /* for next call */ |
| 421 | |
| 422 | return (ret); |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * cvs_read_rcfile() |
| 427 | * |
| 428 | * Read the CVS `.cvsrc' file in the user's home directory. If the file |
| 429 | * exists, it should contain a list of arguments that should always be given |
| 430 | * implicitly to the specified commands. |
| 431 | */ |
| 432 | static void |
| 433 | cvs_read_rcfile(void) |
| 434 | { |
| 435 | char rcpath[PATH_MAX1024], *buf, *lbuf, *lp, *p; |
| 436 | int cmd_parsed, cvs_parsed, i, linenum; |
| 437 | size_t len, pos; |
| 438 | struct cvs_cmd *tcmdp; |
| 439 | FILE *fp; |
| 440 | |
| 441 | linenum = 0; |
| 442 | |
| 443 | i = snprintf(rcpath, PATH_MAX1024, "%s/%s", cvs_homedir, CVS_PATH_RC".cvsrc"); |
| 444 | if (i < 0 || i >= PATH_MAX1024) { |
| 445 | cvs_log(LP_ERRNO2, "%s", rcpath); |
| 446 | return; |
| 447 | } |
| 448 | |
| 449 | fp = fopen(rcpath, "r"); |
| 450 | if (fp == NULL((void *)0)) { |
| 451 | if (errno(*__errno()) != ENOENT2) |
| 452 | cvs_log(LP_NOTICE0, "failed to open `%s': %s", rcpath, |
| 453 | strerror(errno(*__errno()))); |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | cmd_parsed = cvs_parsed = 0; |
| 458 | lbuf = NULL((void *)0); |
| 459 | while ((buf = fgetln(fp, &len)) != NULL((void *)0)) { |
| 460 | if (buf[len - 1] == '\n') { |
| 461 | buf[len - 1] = '\0'; |
| 462 | } else { |
| 463 | lbuf = xmalloc(len + 1); |
| 464 | memcpy(lbuf, buf, len); |
| 465 | lbuf[len] = '\0'; |
| 466 | buf = lbuf; |
| 467 | } |
| 468 | |
| 469 | linenum++; |
| 470 | |
| 471 | /* skip any whitespaces */ |
| 472 | p = buf; |
| 473 | while (*p == ' ') |
| 474 | p++; |
| 475 | |
| 476 | /* |
| 477 | * Allow comments. |
| 478 | * GNU cvs stops parsing a line if it encounters a \t |
| 479 | * in front of a command, stick at this behaviour for |
| 480 | * compatibility. |
| 481 | */ |
| 482 | if (*p == '#' || *p == '\t') |
| 483 | continue; |
| 484 | |
| 485 | pos = strcspn(p, " \t"); |
| 486 | if (pos == strlen(p)) { |
| 487 | lp = NULL((void *)0); |
| 488 | } else { |
| 489 | lp = p + pos; |
| 490 | *lp = '\0'; |
| 491 | } |
| 492 | |
| 493 | if (strcmp(p, "cvs") == 0 && !cvs_parsed) { |
| 494 | /* |
| 495 | * Global default options. In the case of cvs only, |
| 496 | * we keep the 'cvs' string as first argument because |
| 497 | * getopt() does not like starting at index 0 for |
| 498 | * argument processing. |
| 499 | */ |
| 500 | if (lp != NULL((void *)0)) { |
| 501 | *lp = ' '; |
| 502 | cvs_defargs = xstrdup(p); |
| 503 | } |
| 504 | cvs_parsed = 1; |
| 505 | } else { |
| 506 | tcmdp = cvs_findcmd(p); |
| 507 | if (tcmdp == NULL((void *)0) && verbosity == 2) |
| 508 | cvs_log(LP_NOTICE0, |
| 509 | "unknown command `%s' in `%s:%d'", |
| 510 | p, rcpath, linenum); |
| 511 | |
| 512 | if (tcmdp != cmdp || cmd_parsed) |
| 513 | continue; |
| 514 | |
| 515 | if (lp != NULL((void *)0)) { |
| 516 | lp++; |
| 517 | cmdp->cmd_defargs = xstrdup(lp); |
| 518 | } |
| 519 | cmd_parsed = 1; |
| 520 | } |
| 521 | } |
| 522 | free(lbuf); |
| 523 | |
| 524 | if (ferror(fp)(!__isthreaded ? (((fp)->_flags & 0x0040) != 0) : (ferror )(fp))) { |
| 525 | cvs_log(LP_NOTICE0, "failed to read line from `%s'", rcpath); |
| 526 | } |
| 527 | |
| 528 | (void)fclose(fp); |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * cvs_var_set() |
| 533 | * |
| 534 | * Set the value of the variable <var> to <val>. If there is no such variable, |
| 535 | * a new entry is created, otherwise the old value is overwritten. |
| 536 | * Returns 0 on success, or -1 on failure. |
| 537 | */ |
| 538 | int |
| 539 | cvs_var_set(const char *var, const char *val) |
| 540 | { |
| 541 | const char *cp; |
| 542 | struct cvs_var *vp; |
| 543 | |
| 544 | if (var == NULL((void *)0) || *var == '\0') { |
| 545 | cvs_log(LP_ERR1, "no variable name"); |
| 546 | return (-1); |
| 547 | } |
| 548 | |
| 549 | /* sanity check on the name */ |
| 550 | for (cp = var; *cp != '\0'; cp++) |
| 551 | if (!isalnum((unsigned char)*cp) && (*cp != '_')) { |
| 552 | cvs_log(LP_ERR1, |
| 553 | "variable name `%s' contains invalid characters", |
| 554 | var); |
| 555 | return (-1); |
| 556 | } |
| 557 | |
| 558 | TAILQ_FOREACH(vp, &cvs_variables, cv_link)for((vp) = ((&cvs_variables)->tqh_first); (vp) != ((void *)0); (vp) = ((vp)->cv_link.tqe_next)) |
| 559 | if (strcmp(vp->cv_name, var) == 0) |
| 560 | break; |
| 561 | |
| 562 | if (vp == NULL((void *)0)) { |
| 563 | vp = xcalloc(1, sizeof(*vp)); |
| 564 | |
| 565 | vp->cv_name = xstrdup(var); |
| 566 | TAILQ_INSERT_TAIL(&cvs_variables, vp, cv_link)do { (vp)->cv_link.tqe_next = ((void *)0); (vp)->cv_link .tqe_prev = (&cvs_variables)->tqh_last; *(&cvs_variables )->tqh_last = (vp); (&cvs_variables)->tqh_last = & (vp)->cv_link.tqe_next; } while (0); |
| 567 | |
| 568 | } else /* free the previous value */ |
| 569 | free(vp->cv_val); |
| 570 | |
| 571 | vp->cv_val = xstrdup(val); |
| 572 | |
| 573 | return (0); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * cvs_var_unset() |
| 578 | * |
| 579 | * Remove any entry for the variable <var>. |
| 580 | * Returns 0 on success, or -1 on failure. |
| 581 | */ |
| 582 | int |
| 583 | cvs_var_unset(const char *var) |
| 584 | { |
| 585 | struct cvs_var *vp; |
| 586 | |
| 587 | TAILQ_FOREACH(vp, &cvs_variables, cv_link)for((vp) = ((&cvs_variables)->tqh_first); (vp) != ((void *)0); (vp) = ((vp)->cv_link.tqe_next)) |
| 588 | if (strcmp(vp->cv_name, var) == 0) { |
| 589 | TAILQ_REMOVE(&cvs_variables, vp, cv_link)do { if (((vp)->cv_link.tqe_next) != ((void *)0)) (vp)-> cv_link.tqe_next->cv_link.tqe_prev = (vp)->cv_link.tqe_prev ; else (&cvs_variables)->tqh_last = (vp)->cv_link.tqe_prev ; *(vp)->cv_link.tqe_prev = (vp)->cv_link.tqe_next; ; ; } while (0); |
| 590 | free(vp->cv_name); |
| 591 | free(vp->cv_val); |
| 592 | free(vp); |
| 593 | return (0); |
| 594 | } |
| 595 | |
| 596 | return (-1); |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * cvs_var_get() |
| 601 | * |
| 602 | * Get the value associated with the variable <var>. Returns a pointer to the |
| 603 | * value string on success, or NULL if the variable does not exist. |
| 604 | */ |
| 605 | |
| 606 | const char * |
| 607 | cvs_var_get(const char *var) |
| 608 | { |
| 609 | struct cvs_var *vp; |
| 610 | |
| 611 | TAILQ_FOREACH(vp, &cvs_variables, cv_link)for((vp) = ((&cvs_variables)->tqh_first); (vp) != ((void *)0); (vp) = ((vp)->cv_link.tqe_next)) |
| 612 | if (strcmp(vp->cv_name, var) == 0) |
| 613 | return (vp->cv_val); |
| 614 | |
| 615 | return (NULL((void *)0)); |
| 616 | } |