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[glibc.git] / nis / nis_ismember.c
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1 /* Copyright (c) 1997, 1998, 1999 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <string.h>
21 #include <rpcsvc/nis.h>
23 /* internal_nis_ismember ()
24 return codes: -1 principal is in -group
25 0 principal isn't in any group
26 1 pirncipal is in group */
27 static int
28 internal_ismember (const_nis_name principal, const_nis_name group)
30 size_t grouplen = strlen (group);
31 char buf[grouplen + 50];
32 char leafbuf[grouplen + 2];
33 char domainbuf[grouplen + 2];
34 nis_result *res;
35 char *cp, *cp2;
36 u_int i;
38 cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1));
39 cp = stpcpy (cp, ".groups_dir");
40 cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
41 if (cp2 != NULL && cp2[0] != '\0')
43 *cp++ = '.';
44 strcpy (cp, cp2);
47 res = nis_lookup (buf, EXPAND_NAME|FOLLOW_LINKS);
48 if (res == NULL || NIS_RES_STATUS (res) != NIS_SUCCESS)
50 if (res)
51 nis_freeresult (res);
52 return 0;
55 if ((NIS_RES_NUMOBJ (res) != 1) ||
56 (__type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ))
58 nis_freeresult (res);
59 return 0;
62 /* We search twice in the list, at first, if we have the name
63 with a "-", then if without. "-member" has priority */
64 for (i = 0; i < NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len; ++i)
66 cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i];
67 if (cp[0] == '-')
69 if (strcmp (&cp[1], principal) == 0)
71 nis_freeresult (res);
72 return -1;
74 if (cp[1] == '@')
75 switch (internal_ismember (principal, &cp[2]))
77 case -1:
78 nis_freeresult (res);
79 return -1;
80 case 1:
81 nis_freeresult (res);
82 return 1;
83 default:
84 break;
86 else
87 if (cp[1] == '*')
89 char buf1[strlen (principal) + 2];
90 char buf2[strlen (cp) + 2];
92 if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1),
93 nis_domain_of_r (cp, buf2, sizeof buf2)) == 0)
95 nis_freeresult (res);
96 return -1;
102 for (i = 0; i < NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len; ++i)
104 cp = NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[i];
105 if (cp[0] != '-')
107 if (strcmp (cp, principal) == 0)
109 nis_freeresult (res);
110 return 1;
112 if (cp[0] == '@')
113 switch (internal_ismember (principal, &cp[1]))
115 case -1:
116 nis_freeresult (res);
117 return -1;
118 case 1:
119 nis_freeresult (res);
120 return 1;
121 default:
122 break;
124 else
125 if (cp[0] == '*')
127 char buf1[strlen (principal) + 2];
128 char buf2[strlen (cp) + 2];
130 if (strcmp (nis_domain_of_r (principal, buf1, sizeof buf1),
131 nis_domain_of_r (cp, buf2, sizeof buf2)) == 0)
133 nis_freeresult (res);
134 return 1;
139 nis_freeresult (res);
140 return 0;
143 bool_t
144 nis_ismember (const_nis_name principal, const_nis_name group)
146 if (group != NULL && group[0] != '\0' && principal != NULL)
147 return internal_ismember (principal, group) == 1 ? TRUE : FALSE;
148 else
149 return FALSE;