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caa14ca2 MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Utilities not worth librarifying | |
4 | * | |
5 | * (c) 2008 Mark Wooding | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of chkpath. | |
11 | * | |
12 | * chkpath is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * chkpath is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with chkpath; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
27 | /*----- Header files ------------------------------------------------------*/ | |
28 | ||
29 | #include "config.h" | |
30 | ||
31 | #include <ctype.h> | |
32 | ||
33 | #include <sys/types.h> | |
34 | ||
35 | #include <grp.h> | |
36 | ||
37 | #include <mLib/macros.h> | |
38 | #include <mLib/report.h> | |
39 | ||
40 | #include "checkpath.h" | |
41 | #include "utils.h" | |
42 | ||
43 | /*----- Main code ---------------------------------------------------------*/ | |
44 | ||
45 | /* --- @allowgroup@ --- * | |
46 | * | |
47 | * Arguments: @struct checkpath *cp@ = pointer to structure to mess with | |
48 | * @const char *gname@ = trust group @gname@ | |
49 | * | |
50 | * Returns: --- | |
51 | * | |
52 | * Use: Adds the gid corresponding to @gname@ (which may be a number) | |
53 | * to the list of things we trust. | |
54 | */ | |
55 | ||
56 | void allowgroup(struct checkpath *cp, const char *gname) | |
57 | { | |
58 | struct group *gr; | |
59 | const char *p; | |
60 | gid_t g; | |
61 | ||
62 | /* --- Check for numeric group spec --- */ | |
63 | ||
64 | for (p = gname; *p; p++) { | |
65 | if (!isdigit((unsigned char)*p)) | |
66 | goto lookup; | |
67 | } | |
68 | g = atoi(gname); | |
69 | goto insert; | |
70 | ||
71 | /* --- Look up a group by name --- */ | |
72 | ||
73 | lookup: | |
74 | if ((gr = getgrnam(gname)) == 0) | |
75 | die(1, "group %s not found", gname); | |
76 | g = gr->gr_gid; | |
77 | ||
78 | /* --- Insert the group into the table --- */ | |
79 | ||
80 | insert: | |
81 | if (cp->cp_gids >= N(cp->cp_gid)) | |
82 | die(1, "too many groups"); | |
83 | cp->cp_gid[cp->cp_gids++] = g; | |
84 | } | |
85 | ||
86 | /*----- That's all, folks -------------------------------------------------*/ |