122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* Ported by John George
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* Copyright (C) 2021 SUSE LLC <mdoucha@suse.cz>
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*/
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/*\
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* [Description]
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*
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* Test the setreuid() feature, verifying the role of the saved-set-uid
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* and setreuid's effect on it.
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*/
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#include <sys/types.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#include "tst_uid.h"
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#include "compat_tst_16.h"
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static uid_t root_uid, nobody_uid, main_uid, other_uid, neg_one = -1;
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struct test_data_t {
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uid_t *real_uid;
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uid_t *eff_uid;
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int exp_ret;
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uid_t *exp_real_uid;
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uid_t *exp_eff_uid;
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uid_t *exp_sav_uid;
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const char *test_msg;
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} test_data[] = {
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{&nobody_uid, &root_uid, 0, &nobody_uid, &root_uid, &root_uid,
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"setreuid(nobody, root)"},
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{&neg_one, &nobody_uid, 0, &nobody_uid, &nobody_uid, &root_uid,
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"setreuid(-1, nobody)"},
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{&neg_one, &root_uid, 0, &nobody_uid, &root_uid, &root_uid,
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"setreuid(-1, root)"},
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{&main_uid, &neg_one, 0, &main_uid, &root_uid, &root_uid,
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"setreuid(main, -1)"},
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{&neg_one, &other_uid, 0, &main_uid, &other_uid, &other_uid,
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"setreuid(-1, other)"},
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{&neg_one, &root_uid, -1, &main_uid, &other_uid, &other_uid,
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"setreuid(-1, root)"},
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{&neg_one, &nobody_uid, -1, &main_uid, &other_uid, &other_uid,
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"setreuid(-1, nobody)"},
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{&neg_one, &main_uid, 0, &main_uid, &main_uid, &other_uid,
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"setreuid(-1, main)"},
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{&neg_one, &other_uid, 0, &main_uid, &other_uid, &other_uid,
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"setreuid(-1, other)"},
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{&other_uid, &main_uid, 0, &other_uid, &main_uid, &main_uid,
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"setreuid(other, main)"},
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{&neg_one, &other_uid, 0, &other_uid, &other_uid, &main_uid,
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"setreuid(-1, other)"},
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{&neg_one, &main_uid, 0, &other_uid, &main_uid, &main_uid,
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"setreuid(-1, main)"},
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{&main_uid, &neg_one, 0, &main_uid, &main_uid, &main_uid,
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"setreuid(main, -1)"},
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{&neg_one, &other_uid, -1, &main_uid, &main_uid, &main_uid,
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"setreuid(-1, other)"},
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};
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static void setup(void)
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{
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uid_t test_users[3];
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struct passwd *pw;
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root_uid = getuid();
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pw = SAFE_GETPWNAM("nobody");
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nobody_uid = test_users[0] = pw->pw_uid;
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tst_get_uids(test_users, 1, 3);
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main_uid = test_users[1];
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other_uid = test_users[2];
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UID16_CHECK(root_uid, setreuid);
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UID16_CHECK(nobody_uid, setreuid);
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UID16_CHECK(main_uid, setreuid);
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UID16_CHECK(other_uid, setreuid);
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/* Make sure that saved UID is also set to root */
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SAFE_SETUID(root_uid);
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}
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static void run_child(const struct test_data_t *tc)
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{
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if (tc->exp_ret) {
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TST_EXP_FAIL(SETREUID(*tc->real_uid, *tc->eff_uid), EPERM,
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"%s", tc->test_msg);
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} else {
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TST_EXP_PASS(SETREUID(*tc->real_uid, *tc->eff_uid), "%s",
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tc->test_msg);
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}
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if (!TST_PASS)
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return;
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tst_check_resuid(tc->test_msg, *tc->exp_real_uid, *tc->exp_eff_uid,
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*tc->exp_sav_uid);
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}
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static void run(void)
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{
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if (!SAFE_FORK()) {
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(test_data); i++)
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run_child(test_data + i);
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exit(0);
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}
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tst_reap_children();
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}
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static struct tst_test test = {
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.test_all = run,
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.setup = setup,
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.needs_root = 1,
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.forks_child = 1,
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};
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