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bb0cfa24 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
eabc610b KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bb0cfa24 DF |
16 | */ |
17 | ||
2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
60d94477 | 19 | static char sccsid[] = "@(#)initgroups.c 5.5 (Berkeley) %G%"; |
eabc610b | 20 | #endif /* LIBC_SCCS and not lint */ |
a4f42d0e SL |
21 | |
22 | /* | |
23 | * initgroups | |
24 | */ | |
25 | #include <stdio.h> | |
26 | #include <sys/param.h> | |
27 | #include <grp.h> | |
28 | ||
29 | struct group *getgrent(); | |
30 | ||
31 | initgroups(uname, agroup) | |
32 | char *uname; | |
33 | int agroup; | |
34 | { | |
35 | int groups[NGROUPS], ngroups = 0; | |
36 | register struct group *grp; | |
37 | register int i; | |
38 | ||
60d94477 MK |
39 | /* |
40 | * If installing primary group, duplicate it; | |
41 | * the first element of groups is the effective gid | |
42 | * and will be overwritten when a setgid file is executed. | |
43 | */ | |
44 | if (agroup >= 0) { | |
a4f42d0e | 45 | groups[ngroups++] = agroup; |
60d94477 MK |
46 | groups[ngroups++] = agroup; |
47 | } | |
a4f42d0e | 48 | setgrent(); |
0fb3f429 SL |
49 | while (grp = getgrent()) { |
50 | if (grp->gr_gid == agroup) | |
51 | continue; | |
a4f42d0e SL |
52 | for (i = 0; grp->gr_mem[i]; i++) |
53 | if (!strcmp(grp->gr_mem[i], uname)) { | |
a4f42d0e | 54 | if (ngroups == NGROUPS) { |
0fb3f429 | 55 | fprintf(stderr, "initgroups: %s is in too many groups\n", uname); |
a4f42d0e SL |
56 | goto toomany; |
57 | } | |
7479b5d0 | 58 | groups[ngroups++] = grp->gr_gid; |
a4f42d0e | 59 | } |
0fb3f429 | 60 | } |
a4f42d0e | 61 | toomany: |
4ce247a6 | 62 | endgrent(); |
a4f42d0e | 63 | if (setgroups(ngroups, groups) < 0) { |
0fb3f429 | 64 | perror("setgroups"); |
b3b3b313 | 65 | return (-1); |
a4f42d0e SL |
66 | } |
67 | return (0); | |
68 | } |