1 /* $OpenBSD: groupaccess.c,v 1.3 2001/01/29 01:58:15 niklas Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Kevin Steves. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "includes.h" 28 29 #include "groupaccess.h" 30 #include "xmalloc.h" 31 #include "match.h" 32 #include "log.h" 33 34 static int ngroups; 35 static char *groups_byname[NGROUPS_MAX + 1]; /* +1 for base/primary group */ 36 37 int 38 ga_init(const char *user, gid_t base) 39 { 40 gid_t groups_bygid[NGROUPS_MAX + 1]; 41 int i, j; 42 struct group *gr; 43 44 if (ngroups > 0) 45 ga_free(); 46 47 ngroups = sizeof(groups_bygid) / sizeof(gid_t); 48 if (getgrouplist(user, base, groups_bygid, &ngroups) == -1) 49 log("getgrouplist: groups list too small"); 50 for (i = 0, j = 0; i < ngroups; i++) 51 if ((gr = getgrgid(groups_bygid[i])) != NULL) 52 groups_byname[j++] = xstrdup(gr->gr_name); 53 return (ngroups = j); 54 } 55 56 int 57 ga_match(char * const *groups, int n) 58 { 59 int i, j; 60 61 for (i = 0; i < ngroups; i++) 62 for (j = 0; j < n; j++) 63 if (match_pattern(groups_byname[i], groups[j])) 64 return 1; 65 return 0; 66 } 67 68 void 69 ga_free(void) 70 { 71 int i; 72 73 if (ngroups > 0) { 74 for (i = 0; i < ngroups; i++) 75 xfree(groups_byname[i]); 76 ngroups = 0; 77 } 78 } 79