1 /* $NetBSD: su.c,v 1.51 2002/11/16 15:59:31 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1988 The Regents of the University of California. 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 * 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT( 39 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\ 40 All rights reserved.\n"); 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)su.c 8.3 (Berkeley) 4/2/94";*/ 46 #else 47 __RCSID("$NetBSD: su.c,v 1.51 2002/11/16 15:59:31 itojun Exp $"); 48 #endif 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/time.h> 53 #include <sys/resource.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <grp.h> 57 #include <paths.h> 58 #include <pwd.h> 59 #include <stdio.h> 60 #ifdef SKEY 61 #include <skey.h> 62 #endif 63 #include <stdlib.h> 64 #include <string.h> 65 #include <syslog.h> 66 #include <time.h> 67 #include <tzfile.h> 68 #include <unistd.h> 69 70 #ifdef LOGIN_CAP 71 #include <login_cap.h> 72 #endif 73 74 #ifdef KERBEROS 75 #include <des.h> 76 #include <krb.h> 77 #include <netdb.h> 78 79 static int kerberos __P((char *, char *, int)); 80 static int koktologin __P((char *, char *, char *)); 81 82 #endif 83 84 #ifdef KERBEROS5 85 #include <krb5.h> 86 87 static int kerberos5 __P((char *, char *, int)); 88 89 #endif 90 91 #if defined(KERBEROS) || defined(KERBEROS5) 92 93 #define ARGSTRX "-Kflm" 94 95 int use_kerberos = 1; 96 97 #else 98 #define ARGSTRX "-flm" 99 #endif 100 101 #ifndef SUGROUP 102 #define SUGROUP "wheel" 103 #endif 104 105 #ifdef LOGIN_CAP 106 #define ARGSTR ARGSTRX "c:" 107 #else 108 #define ARGSTR ARGSTRX 109 #endif 110 111 int main __P((int, char **)); 112 113 static int chshell __P((const char *)); 114 static char *ontty __P((void)); 115 static int check_ingroup __P((int, const char *, const char *, int)); 116 117 118 int 119 main(argc, argv) 120 int argc; 121 char **argv; 122 { 123 extern char **environ; 124 struct passwd *pwd; 125 char *p; 126 #ifdef BSD4_4 127 struct timeval tp; 128 #endif 129 uid_t ruid; 130 int asme, ch, asthem, fastlogin, prio; 131 enum { UNSET, YES, NO } iscsh = UNSET; 132 char *user, *shell, *avshell, *username, **np; 133 char *userpass, *class; 134 char shellbuf[MAXPATHLEN], avshellbuf[MAXPATHLEN]; 135 time_t pw_warntime = _PASSWORD_WARNDAYS * SECSPERDAY; 136 #ifdef LOGIN_CAP 137 login_cap_t *lc; 138 #endif 139 140 asme = asthem = fastlogin = 0; 141 shell = class = NULL; 142 while ((ch = getopt(argc, argv, ARGSTR)) != -1) 143 switch((char)ch) { 144 #if defined(KERBEROS) || defined(KERBEROS5) 145 case 'K': 146 use_kerberos = 0; 147 break; 148 #endif 149 #ifdef LOGIN_CAP 150 case 'c': 151 class = optarg; 152 break; 153 #endif 154 case 'f': 155 fastlogin = 1; 156 break; 157 case '-': 158 case 'l': 159 asme = 0; 160 asthem = 1; 161 break; 162 case 'm': 163 asme = 1; 164 asthem = 0; 165 break; 166 case '?': 167 default: 168 (void)fprintf(stderr, 169 "Usage: %s [%s] [login [shell arguments]]\n", 170 getprogname(), ARGSTR); 171 exit(1); 172 } 173 argv += optind; 174 175 /* Lower the priority so su runs faster */ 176 errno = 0; 177 prio = getpriority(PRIO_PROCESS, 0); 178 if (errno) 179 prio = 0; 180 if (prio > -2) 181 (void)setpriority(PRIO_PROCESS, 0, -2); 182 openlog("su", 0, LOG_AUTH); 183 184 /* get current login name and shell */ 185 ruid = getuid(); 186 username = getlogin(); 187 if (username == NULL || (pwd = getpwnam(username)) == NULL || 188 pwd->pw_uid != ruid) 189 pwd = getpwuid(ruid); 190 if (pwd == NULL) 191 errx(1, "who are you?"); 192 username = strdup(pwd->pw_name); 193 userpass = strdup(pwd->pw_passwd); 194 if (username == NULL || userpass == NULL) 195 err(1, "strdup"); 196 197 198 if (asme) { 199 if (pwd->pw_shell && *pwd->pw_shell) { 200 strlcpy(shellbuf, pwd->pw_shell, sizeof(shellbuf)); 201 shell = shellbuf; 202 } else { 203 shell = _PATH_BSHELL; 204 iscsh = NO; 205 } 206 } 207 /* get target login information, default to root */ 208 user = *argv ? *argv : "root"; 209 np = *argv ? argv : argv-1; 210 211 if ((pwd = getpwnam(user)) == NULL) 212 errx(1, "unknown login %s", user); 213 214 #ifdef LOGIN_CAP 215 /* force the usage of specified class */ 216 if (class) { 217 if (ruid) 218 errx(1, "Only root may use -c"); 219 220 pwd->pw_class = class; 221 } 222 lc = login_getclass(pwd->pw_class); 223 224 pw_warntime = login_getcaptime(lc, "password-warn", 225 _PASSWORD_WARNDAYS * SECSPERDAY, 226 _PASSWORD_WARNDAYS * SECSPERDAY); 227 #endif 228 229 if (ruid 230 #ifdef KERBEROS5 231 && (!use_kerberos || kerberos5(username, user, pwd->pw_uid)) 232 #endif 233 #ifdef KERBEROS 234 && (!use_kerberos || kerberos(username, user, pwd->pw_uid)) 235 #endif 236 ) { 237 char *pass = pwd->pw_passwd; 238 int ok = pwd->pw_uid != 0; 239 240 #ifdef ROOTAUTH 241 /* 242 * Allow those in group rootauth to su to root, by supplying 243 * their own password. 244 */ 245 if (!ok) { 246 if ((ok = check_ingroup(-1, ROOTAUTH, username, 0))) { 247 pass = userpass; 248 user = username; 249 } 250 } 251 #endif 252 /* 253 * Only allow those in group SUGROUP to su to root, 254 * but only if that group has any members. 255 * If SUGROUP has no members, allow anyone to su root 256 */ 257 if (!ok) { 258 ok = check_ingroup(-1, SUGROUP, username, 1); 259 } 260 if (!ok) 261 errx(1, 262 "you are not listed in the correct secondary group (%s) to su %s.", 263 SUGROUP, user); 264 /* if target requires a password, verify it */ 265 if (*pass) { 266 p = getpass("Password:"); 267 #ifdef SKEY 268 if (strcasecmp(p, "s/key") == 0) { 269 if (skey_haskey(user)) 270 errx(1, "Sorry, you have no s/key."); 271 else { 272 if (skey_authenticate(user)) { 273 goto badlogin; 274 } 275 } 276 277 } else 278 #endif 279 if (strcmp(pass, crypt(p, pass))) { 280 #ifdef SKEY 281 badlogin: 282 #endif 283 fprintf(stderr, "Sorry\n"); 284 syslog(LOG_WARNING, 285 "BAD SU %s to %s%s", username, 286 pwd->pw_name, ontty()); 287 exit(1); 288 } 289 } 290 } 291 292 if (asme) { 293 /* if asme and non-standard target shell, must be root */ 294 if (!chshell(pwd->pw_shell) && ruid) 295 errx(1,"permission denied (shell)."); 296 } else if (pwd->pw_shell && *pwd->pw_shell) { 297 shell = pwd->pw_shell; 298 iscsh = UNSET; 299 } else { 300 shell = _PATH_BSHELL; 301 iscsh = NO; 302 } 303 304 if ((p = strrchr(shell, '/')) != NULL) 305 avshell = p+1; 306 else 307 avshell = shell; 308 309 /* if we're forking a csh, we want to slightly muck the args */ 310 if (iscsh == UNSET) 311 iscsh = strstr(avshell, "csh") ? YES : NO; 312 313 /* set permissions */ 314 #ifdef LOGIN_CAP 315 if (setusercontext(lc, pwd, pwd->pw_uid, 316 (asthem ? (LOGIN_SETPRIORITY | LOGIN_SETUMASK) : 0) | 317 LOGIN_SETRESOURCES | LOGIN_SETGROUP | LOGIN_SETUSER)) 318 err(1, "setting user context"); 319 #else 320 if (setgid(pwd->pw_gid) < 0) 321 err(1, "setgid"); 322 if (initgroups(user, pwd->pw_gid)) 323 errx(1, "initgroups failed"); 324 if (setuid(pwd->pw_uid) < 0) 325 err(1, "setuid"); 326 #endif 327 328 if (!asme) { 329 if (asthem) { 330 p = getenv("TERM"); 331 /* Create an empty environment */ 332 if ((environ = malloc(sizeof(char *))) == NULL) 333 err(1, NULL); 334 environ[0] = NULL; 335 #ifdef LOGIN_CAP 336 if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETPATH)) 337 err(1, "setting user context"); 338 #else 339 (void)setenv("PATH", _PATH_DEFPATH, 1); 340 #endif 341 if (p) 342 (void)setenv("TERM", p, 1); 343 if (chdir(pwd->pw_dir) < 0) 344 errx(1, "no directory"); 345 } 346 347 if (asthem || pwd->pw_uid) 348 (void)setenv("USER", pwd->pw_name, 1); 349 (void)setenv("HOME", pwd->pw_dir, 1); 350 (void)setenv("SHELL", shell, 1); 351 } 352 (void)setenv("SU_FROM", username, 1); 353 354 if (iscsh == YES) { 355 if (fastlogin) 356 *np-- = "-f"; 357 if (asme) 358 *np-- = "-m"; 359 } 360 361 if (asthem) { 362 avshellbuf[0] = '-'; 363 (void)strlcpy(avshellbuf+1, avshell, sizeof(avshellbuf) - 1); 364 avshell = avshellbuf; 365 } else if (iscsh == YES) { 366 /* csh strips the first character... */ 367 avshellbuf[0] = '_'; 368 (void)strlcpy(avshellbuf+1, avshell, sizeof(avshellbuf) - 1); 369 avshell = avshellbuf; 370 } 371 *np = avshell; 372 373 #ifdef BSD4_4 374 if (pwd->pw_change || pwd->pw_expire) 375 (void)gettimeofday(&tp, (struct timezone *)NULL); 376 if (pwd->pw_change) { 377 if (tp.tv_sec >= pwd->pw_change) { 378 (void)printf("%s -- %s's password has expired.\n", 379 (ruid ? "Sorry" : "Note"), user); 380 if (ruid != 0) 381 exit(1); 382 } else if (pwd->pw_change - tp.tv_sec < pw_warntime) 383 (void)printf("Warning: %s's password expires on %s", 384 user, ctime(&pwd->pw_change)); 385 } 386 if (pwd->pw_expire) { 387 if (tp.tv_sec >= pwd->pw_expire) { 388 (void)printf("%s -- %s's account has expired.\n", 389 (ruid ? "Sorry" : "Note"), user); 390 if (ruid != 0) 391 exit(1); 392 } else if (pwd->pw_expire - tp.tv_sec < 393 _PASSWORD_WARNDAYS * SECSPERDAY) 394 (void)printf("Warning: %s's account expires on %s", 395 user, ctime(&pwd->pw_expire)); 396 } 397 #endif 398 if (ruid != 0) 399 syslog(LOG_NOTICE, "%s to %s%s", 400 username, pwd->pw_name, ontty()); 401 402 /* Raise our priority back to what we had before */ 403 (void)setpriority(PRIO_PROCESS, 0, prio); 404 405 execv(shell, np); 406 err(1, "%s", shell); 407 /* NOTREACHED */ 408 } 409 410 static int 411 chshell(sh) 412 const char *sh; 413 { 414 const char *cp; 415 416 while ((cp = getusershell()) != NULL) 417 if (!strcmp(cp, sh)) 418 return (1); 419 return (0); 420 } 421 422 static char * 423 ontty() 424 { 425 char *p; 426 static char buf[MAXPATHLEN + 4]; 427 428 buf[0] = 0; 429 if ((p = ttyname(STDERR_FILENO)) != NULL) 430 (void)snprintf(buf, sizeof buf, " on %s", p); 431 return (buf); 432 } 433 434 #ifdef KERBEROS5 435 static int 436 kerberos5(username, user, uid) 437 char *username, *user; 438 int uid; 439 { 440 krb5_error_code ret; 441 krb5_context context; 442 krb5_principal princ = NULL; 443 krb5_ccache ccache, ccache2; 444 char *cc_name; 445 const char *filename; 446 447 ret = krb5_init_context(&context); 448 if (ret) 449 return (1); 450 451 if (strcmp (user, "root") == 0) 452 ret = krb5_make_principal(context, &princ, 453 NULL, username, "root", NULL); 454 else 455 ret = krb5_make_principal(context, &princ, 456 NULL, user, NULL); 457 if (ret) 458 goto fail; 459 if (!krb5_kuserok(context, princ, user) && !uid) { 460 warnx ("kerberos5: not in %s's ACL.", user); 461 goto fail; 462 } 463 ret = krb5_cc_gen_new(context, &krb5_mcc_ops, &ccache); 464 if (ret) 465 goto fail; 466 ret = krb5_verify_user_lrealm(context, princ, ccache, NULL, TRUE, 467 NULL); 468 if (ret) { 469 krb5_cc_destroy(context, ccache); 470 switch (ret) { 471 case KRB5_LIBOS_PWDINTR : 472 break; 473 case KRB5KRB_AP_ERR_BAD_INTEGRITY: 474 case KRB5KRB_AP_ERR_MODIFIED: 475 krb5_warnx(context, "Password incorrect"); 476 break; 477 default : 478 krb5_warn(context, ret, "krb5_verify_user"); 479 break; 480 } 481 goto fail; 482 } 483 ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache2); 484 if (ret) { 485 krb5_cc_destroy(context, ccache); 486 goto fail; 487 } 488 ret = krb5_cc_copy_cache(context, ccache, ccache2); 489 if (ret) { 490 krb5_cc_destroy(context, ccache); 491 krb5_cc_destroy(context, ccache2); 492 goto fail; 493 } 494 495 filename = krb5_cc_get_name(context, ccache2); 496 asprintf(&cc_name, "%s:%s", krb5_cc_get_type(context, ccache2), 497 filename); 498 if (chown (filename, uid, -1) < 0) { 499 warn("chown %s", filename); 500 free(cc_name); 501 krb5_cc_destroy(context, ccache); 502 krb5_cc_destroy(context, ccache2); 503 goto fail; 504 } 505 506 setenv("KRB5CCNAME", cc_name, 1); 507 free(cc_name); 508 krb5_cc_close(context, ccache2); 509 krb5_cc_destroy(context, ccache); 510 return (0); 511 512 fail: 513 if (princ != NULL) 514 krb5_free_principal (context, princ); 515 krb5_free_context (context); 516 return (1); 517 } 518 #endif 519 520 #ifdef KERBEROS 521 static int 522 kerberos(username, user, uid) 523 char *username, *user; 524 int uid; 525 { 526 KTEXT_ST ticket; 527 AUTH_DAT authdata; 528 struct hostent *hp; 529 int kerno; 530 u_long faddr; 531 char lrealm[REALM_SZ], krbtkfile[MAXPATHLEN]; 532 char hostname[MAXHOSTNAMELEN + 1], savehost[MAXHOSTNAMELEN + 1]; 533 534 if (krb_get_lrealm(lrealm, 1) != KSUCCESS) 535 return (1); 536 if (koktologin(username, lrealm, user) && !uid) { 537 warnx("kerberos: not in %s's ACL.", user); 538 return (1); 539 } 540 (void)snprintf(krbtkfile, sizeof krbtkfile, "%s_%s_%d", TKT_ROOT, 541 user, getuid()); 542 543 (void)setenv("KRBTKFILE", krbtkfile, 1); 544 (void)krb_set_tkt_string(krbtkfile); 545 /* 546 * Set real as well as effective ID to 0 for the moment, 547 * to make the kerberos library do the right thing. 548 */ 549 if (setuid(0) < 0) { 550 warn("setuid"); 551 return (1); 552 } 553 554 /* 555 * Little trick here -- if we are su'ing to root, 556 * we need to get a ticket for "xxx.root", where xxx represents 557 * the name of the person su'ing. Otherwise (non-root case), 558 * we need to get a ticket for "yyy.", where yyy represents 559 * the name of the person being su'd to, and the instance is null 560 * 561 * We should have a way to set the ticket lifetime, 562 * with a system default for root. 563 */ 564 { 565 char prompt[128]; 566 char passw[256]; 567 568 (void)snprintf (prompt, sizeof(prompt), 569 "%s's Password: ", 570 krb_unparse_name_long ((uid == 0 ? username : user), 571 (uid == 0 ? "root" : ""), 572 lrealm)); 573 if (des_read_pw_string (passw, sizeof (passw), prompt, 0)) { 574 memset (passw, 0, sizeof (passw)); 575 return (1); 576 } 577 if (strlen(passw) == 0) 578 return (1); /* Empty passwords are not allowed */ 579 580 kerno = krb_get_pw_in_tkt((uid == 0 ? username : user), 581 (uid == 0 ? "root" : ""), lrealm, 582 KRB_TICKET_GRANTING_TICKET, 583 lrealm, 584 DEFAULT_TKT_LIFE, 585 passw); 586 memset (passw, 0, strlen (passw)); 587 } 588 589 if (kerno != KSUCCESS) { 590 if (kerno == KDC_PR_UNKNOWN) { 591 warnx("kerberos: principal unknown: %s.%s@%s", 592 (uid == 0 ? username : user), 593 (uid == 0 ? "root" : ""), lrealm); 594 return (1); 595 } 596 warnx("kerberos: unable to su: %s", krb_err_txt[kerno]); 597 syslog(LOG_WARNING, 598 "BAD Kerberos SU: %s to %s%s: %s", 599 username, user, ontty(), krb_err_txt[kerno]); 600 return (1); 601 } 602 603 if (chown(krbtkfile, uid, -1) < 0) { 604 warn("chown"); 605 (void)unlink(krbtkfile); 606 return (1); 607 } 608 609 (void)setpriority(PRIO_PROCESS, 0, -2); 610 611 if (gethostname(hostname, sizeof(hostname)) == -1) { 612 warn("gethostname"); 613 dest_tkt(); 614 return (1); 615 } 616 hostname[sizeof(hostname) - 1] = '\0'; 617 618 (void)strlcpy(savehost, krb_get_phost(hostname), sizeof(savehost)); 619 savehost[sizeof(savehost) - 1] = '\0'; 620 621 kerno = krb_mk_req(&ticket, "rcmd", savehost, lrealm, 33); 622 623 if (kerno == KDC_PR_UNKNOWN) { 624 warnx("Warning: TGT not verified."); 625 syslog(LOG_WARNING, 626 "%s to %s%s, TGT not verified (%s); %s.%s not registered?", 627 username, user, ontty(), krb_err_txt[kerno], 628 "rcmd", savehost); 629 } else if (kerno != KSUCCESS) { 630 warnx("Unable to use TGT: %s", krb_err_txt[kerno]); 631 syslog(LOG_WARNING, "failed su: %s to %s%s: %s", 632 username, user, ontty(), krb_err_txt[kerno]); 633 dest_tkt(); 634 return (1); 635 } else { 636 if (!(hp = gethostbyname(hostname))) { 637 warnx("can't get addr of %s", hostname); 638 dest_tkt(); 639 return (1); 640 } 641 memmove((char *)&faddr, (char *)hp->h_addr, sizeof(faddr)); 642 643 if ((kerno = krb_rd_req(&ticket, "rcmd", savehost, faddr, 644 &authdata, "")) != KSUCCESS) { 645 warnx("kerberos: unable to verify rcmd ticket: %s", 646 krb_err_txt[kerno]); 647 syslog(LOG_WARNING, 648 "failed su: %s to %s%s: %s", username, 649 user, ontty(), krb_err_txt[kerno]); 650 dest_tkt(); 651 return (1); 652 } 653 } 654 return (0); 655 } 656 657 static int 658 koktologin(name, realm, toname) 659 char *name, *realm, *toname; 660 { 661 return krb_kuserok(name, 662 strcmp (toname, "root") == 0 ? "root" : "", 663 realm, 664 toname); 665 } 666 #endif 667 668 static int 669 check_ingroup (gid, gname, user, ifempty) 670 int gid; 671 const char *gname; 672 const char *user; 673 int ifempty; 674 { 675 struct group *gr; 676 char **g; 677 #ifdef SU_INDIRECT_GROUP 678 char **gr_mem; 679 int n = 0; 680 int i = 0; 681 #endif 682 int ok = 0; 683 684 if (gname == NULL) 685 gr = getgrgid((gid_t) gid); 686 else 687 gr = getgrnam(gname); 688 689 /* 690 * XXX we are relying on the fact that we only set ifempty when 691 * calling to check for SUGROUP and that is the only time a 692 * missing group is acceptable. 693 */ 694 if (gr == NULL) 695 return ifempty; 696 if (!*gr->gr_mem) /* empty */ 697 return ifempty; 698 699 /* 700 * Ok, first see if user is in gr_mem 701 */ 702 for (g = gr->gr_mem; *g; ++g) { 703 if (strcmp(*g, user) == 0) 704 return 1; /* ok */ 705 #ifdef SU_INDIRECT_GROUP 706 ++n; /* count them */ 707 #endif 708 } 709 #ifdef SU_INDIRECT_GROUP 710 /* 711 * No. 712 * Now we need to duplicate the gr_mem list, and recurse for 713 * each member to see if it is a group, and if so whether user is 714 * in it. 715 */ 716 gr_mem = malloc((n + 1) * sizeof (char *)); 717 for (g = gr->gr_mem, i = 0; *g; ++g) { 718 gr_mem[i] = strdup(*g); 719 if (!gr_mem[i]) 720 err(1, "strdup"); 721 i++; 722 } 723 gr_mem[i++] = NULL; 724 725 for (g = gr_mem; ok == 0 && *g; ++g) { 726 /* 727 * If we get this far we don't accept empty/missing groups. 728 */ 729 ok = check_ingroup(-1, *g, user, 0); 730 } 731 for (g = gr_mem; *g; ++g) { 732 free(*g); 733 } 734 free(gr_mem); 735 #endif 736 return ok; 737 } 738