| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Ported by John George |
| */ |
| |
| /* |
| * Test that setregid() fails and sets the proper errno values when a |
| * non-root user attemps to change the real or effective group id to a |
| * value other than the current gid or the current effective gid. |
| */ |
| |
| #include <errno.h> |
| #include <pwd.h> |
| #include <grp.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| #include "compat_16.h" |
| |
| TCID_DEFINE(setregid02); |
| |
| static gid_t neg_one = -1; |
| |
| static struct passwd *ltpuser; |
| |
| static struct group ltpgroup, root, bin; |
| |
| /* |
| * The following structure contains all test data. Each structure in the array |
| * is used for a separate test. The tests are executed in the for loop below. |
| */ |
| |
| struct test_data_t { |
| gid_t *real_gid; |
| gid_t *eff_gid; |
| int exp_errno; |
| struct group *exp_real_usr; |
| struct group *exp_eff_usr; |
| char *test_msg; |
| } test_data[] = { |
| { |
| &neg_one, &root.gr_gid, EPERM, <pgroup, <pgroup, |
| "After setregid(-1, root),"}, { |
| &neg_one, &bin.gr_gid, EPERM, <pgroup, <pgroup, |
| "After setregid(-1, bin)"}, { |
| &root.gr_gid, &neg_one, EPERM, <pgroup, <pgroup, |
| "After setregid(root,-1),"}, { |
| &bin.gr_gid, &neg_one, EPERM, <pgroup, <pgroup, |
| "After setregid(bin, -1),"}, { |
| &root.gr_gid, &bin.gr_gid, EPERM, <pgroup, <pgroup, |
| "After setregid(root, bin)"}, { |
| &bin.gr_gid, &root.gr_gid, EPERM, <pgroup, <pgroup, |
| "After setregid(bin, root),"} |
| }; |
| |
| int TST_TOTAL = ARRAY_SIZE(test_data); |
| |
| static void setup(void); |
| static void gid_verify(struct group *ru, struct group *eu, char *when); |
| static struct group get_group_by_name(const char *name); |
| static struct group get_group_by_gid(gid_t gid); |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| int i; |
| |
| tst_count = 0; |
| |
| for (i = 0; i < TST_TOTAL; i++) { |
| /* Set the real or effective group id */ |
| TEST(SETREGID(NULL, *test_data[i].real_gid, |
| *test_data[i].eff_gid)); |
| |
| if (TEST_RETURN == -1) { |
| if (TEST_ERRNO == test_data[i].exp_errno) { |
| tst_resm(TPASS, "setregid(%d, %d) " |
| "failed as expected.", |
| *test_data[i].real_gid, |
| *test_data[i].eff_gid); |
| } else { |
| tst_resm(TFAIL, "setregid(%d, %d) " |
| "failed (%d) but did not set the " |
| "expected errno (%d).", |
| *test_data[i].real_gid, |
| *test_data[i].eff_gid, |
| TEST_ERRNO, |
| test_data[i].exp_errno); |
| } |
| } else { |
| tst_resm(TFAIL, "setregid(%d, %d) " |
| "did not fail (ret: %ld) as expected (ret: -1).", |
| *test_data[i].real_gid, |
| *test_data[i].eff_gid, TEST_RETURN); |
| } |
| gid_verify(test_data[i].exp_real_usr, |
| test_data[i].exp_eff_usr, |
| test_data[i].test_msg); |
| } |
| } |
| |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| tst_require_root(); |
| |
| tst_sig(FORK, DEF_HANDLER, NULL); |
| |
| ltpuser = getpwnam("nobody"); |
| if (ltpuser == NULL) |
| tst_brkm(TBROK, NULL, "getpwnam(\"nobody\") failed"); |
| |
| SAFE_SETGID(NULL, ltpuser->pw_gid); |
| SAFE_SETUID(NULL, ltpuser->pw_uid); |
| |
| root = get_group_by_name("root"); |
| ltpgroup = get_group_by_gid(ltpuser->pw_gid); |
| bin = get_group_by_name("bin"); |
| |
| TEST_PAUSE; |
| } |
| |
| static struct group get_group_by_name(const char *name) |
| { |
| struct group *ret = getgrnam(name); |
| |
| if (ret == NULL) |
| tst_brkm(TBROK|TERRNO, NULL, "getgrnam(\"%s\") failed", name); |
| |
| GID16_CHECK(ret->gr_gid, setregid, NULL); |
| |
| return *ret; |
| } |
| |
| static struct group get_group_by_gid(gid_t gid) |
| { |
| struct group *ret = getgrgid(gid); |
| |
| if (ret == NULL) |
| tst_brkm(TBROK|TERRNO, NULL, "getgrgid(\"%d\") failed", gid); |
| |
| GID16_CHECK(ret->gr_gid, setregid, NULL); |
| |
| return *ret; |
| } |
| |
| void gid_verify(struct group *rg, struct group *eg, char *when) |
| { |
| if ((getgid() != rg->gr_gid) || (getegid() != eg->gr_gid)) { |
| tst_resm(TFAIL, "ERROR: %s real gid = %d; effective gid = %d", |
| when, getgid(), getegid()); |
| tst_resm(TINFO, "Expected: real gid = %d; effective gid = %d", |
| rg->gr_gid, eg->gr_gid); |
| } else { |
| tst_resm(TPASS, "real or effective gid was modified as expected"); |
| } |
| } |