/src/sudo/lib/util/gidlist.c
Line | Count | Source |
1 | | /* |
2 | | * SPDX-License-Identifier: ISC |
3 | | * |
4 | | * Copyright (c) 2013-2015 Todd C. Miller <Todd.Miller@sudo.ws> |
5 | | * |
6 | | * Permission to use, copy, modify, and distribute this software for any |
7 | | * purpose with or without fee is hereby granted, provided that the above |
8 | | * copyright notice and this permission notice appear in all copies. |
9 | | * |
10 | | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
11 | | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
12 | | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
13 | | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
14 | | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
15 | | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
16 | | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 | | */ |
18 | | |
19 | | #include <config.h> |
20 | | |
21 | | #include <stdlib.h> |
22 | | #include <grp.h> |
23 | | |
24 | | #include <sudo_compat.h> |
25 | | #include <sudo_debug.h> |
26 | | #include <sudo_fatal.h> |
27 | | #include <sudo_gettext.h> |
28 | | #include <sudo_util.h> |
29 | | |
30 | | /* |
31 | | * Parse a comma-separated list of gids into an allocated array of GETGROUPS_T. |
32 | | * If a pointer to the base gid is specified, it is stored as the first element |
33 | | * in the array. |
34 | | * Returns the number of gids in the allocated array. |
35 | | */ |
36 | | int |
37 | | sudo_parse_gids_v1(const char *gidstr, const gid_t *basegid, GETGROUPS_T **gidsp) |
38 | 1.18k | { |
39 | 1.18k | int ngids = 0; |
40 | 1.18k | GETGROUPS_T *gids; |
41 | 1.18k | const char *cp = gidstr; |
42 | 1.18k | const char *errstr; |
43 | 1.18k | char *ep; |
44 | 1.18k | debug_decl(sudo_parse_gids, SUDO_DEBUG_UTIL); |
45 | | |
46 | | /* Count groups. */ |
47 | 1.18k | if (*cp != '\0') { |
48 | 1.18k | ngids++; |
49 | 2.17M | do { |
50 | 2.17M | if (*cp++ == ',') |
51 | 825k | ngids++; |
52 | 2.17M | } while (*cp != '\0'); |
53 | 1.18k | } |
54 | | /* Base gid is optional. */ |
55 | 1.18k | if (basegid != NULL) |
56 | 1.18k | ngids++; |
57 | | /* Allocate and fill in array. */ |
58 | 1.18k | if (ngids != 0) { |
59 | 1.18k | gids = reallocarray(NULL, (size_t)ngids, sizeof(GETGROUPS_T)); |
60 | 1.18k | if (gids == NULL) { |
61 | 0 | sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory")); |
62 | 0 | debug_return_int(-1); |
63 | 0 | } |
64 | 1.18k | ngids = 0; |
65 | 1.18k | if (basegid != NULL) |
66 | 1.18k | gids[ngids++] = *basegid; |
67 | 1.18k | cp = gidstr; |
68 | 794k | do { |
69 | 794k | gids[ngids] = (GETGROUPS_T) sudo_strtoidx(cp, ",", &ep, &errstr); |
70 | 794k | if (errstr != NULL) { |
71 | 50 | sudo_warnx(U_("%s: %s"), cp, U_(errstr)); |
72 | 50 | free(gids); |
73 | 50 | debug_return_int(-1); |
74 | 50 | } |
75 | 794k | if (basegid == NULL || gids[ngids] != *basegid) |
76 | 742k | ngids++; |
77 | 794k | cp = ep + 1; |
78 | 794k | } while (*ep != '\0'); |
79 | 1.13k | *gidsp = gids; |
80 | 1.13k | } |
81 | 1.13k | debug_return_int(ngids); |
82 | 1.13k | } |