1 /******************************************************************************/
2 /* */
3 /* Copyright (c) International Business Machines Corp., 2007, 2008 */
4 /* */
5 /* This program is free software; you can redistribute it and/or modify */
6 /* it under the terms of the GNU General Public License as published by */
7 /* the Free Software Foundation; either version 2 of the License, or */
8 /* (at your option) any later version. */
9 /* */
10 /* This program 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 */
13 /* the GNU General Public License for more details. */
14 /* */
15 /* You should have received a copy of the GNU General Public License */
16 /* along with this program; if not, write to the Free Software */
17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
18 /* */
19 /******************************************************************************/
20 /*
21 * File: exec_with_inh.c
22 * Author: Serge Hallyn
23 * Make sure that CAP_SYS_ADMIN is in pI
24 * drop CAP_SYS_ADMIN from bounding set
25 * Then exec "check_pe 1"
26 * check_pe will return PASS if it has CAP_SYS_ADMIN in pE.
27 */
28
29 #include <errno.h>
30 #include "config.h"
31 #if HAVE_SYS_CAPABILITY_H
32 #include <linux/types.h>
33 #include <sys/capability.h>
34 #endif
35 #include <sys/prctl.h>
36 #include "test.h"
37
38 char *TCID = "exec_with_inh";
39 int TST_TOTAL = 1;
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 #if HAVE_SYS_CAPABILITY_H
44 #ifdef HAVE_LIBCAP
45 int ret = 1;
46 cap_flag_value_t f;
47 cap_t cur = 0;
48
49 /* Make sure CAP_SYS_ADMIN is in pI */
50 cur = cap_from_text("all=eip");
51 if (!cur) {
52 tst_brkm(TBROK,
53 NULL,
54 "Failed to create cap_sys_admin+i cap_t (errno %d)\n",
55 errno);
56 }
57 ret = cap_set_proc(cur);
58 if (ret) {
59 tst_brkm(TBROK,
60 NULL,
61 "Failed to cap_set_proc with cap_sys_admin+i (ret %d errno %d)\n",
62 ret, errno);
63 }
64 cap_free(cur);
65 cur = cap_get_proc();
66 ret = cap_get_flag(cur, CAP_SYS_ADMIN, CAP_INHERITABLE, &f);
67 if (ret || f != CAP_SET) {
68 tst_brkm(TBROK, NULL, "Failed to add CAP_SYS_ADMIN to pI\n");
69 }
70 cap_free(cur);
71
72 /* drop the capability from bounding set */
73 ret = prctl(PR_CAPBSET_DROP, CAP_SYS_ADMIN);
74 if (ret) {
75 tst_resm(TFAIL,
76 "Failed to drop CAP_SYS_ADMIN from bounding set.\n");
77 tst_resm(TINFO, "(ret=%d, errno %d)\n", ret, errno);
78 tst_exit();
79 }
80
81 /* execute "check_pe 1" */
82 execl("check_pe", "check_pe", "1", NULL);
83 tst_resm(TBROK, "Failed to execute check_pe (errno %d)\n", errno);
84 #else /* HAVE_LIBCAP */
85 tst_resm(TCONF, "System doesn't have POSIX capabilities.");
86 #endif
87 #else /* HAVE_SYS_CAPABILITY_H */
88 tst_resm(TCONF, "System doesn't have sys/capability.h.");
89 #endif
90 tst_exit();
91 }
92