81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
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// 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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* 07/2001 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 that a non-root user can change the real, effective and saved uid
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* values through the setresuid system call.
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*/
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#define _GNU_SOURCE 1
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#include <sys/types.h>
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#include <pwd.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 nobody_uid, other_uid, neg_one = -1;
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static struct test_data_t {
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uid_t *real_uid;
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uid_t *eff_uid;
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uid_t *sav_uid;
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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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char *test_msg;
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} test_data[] = {
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{&neg_one, &neg_one, &other_uid, &nobody_uid, &other_uid, &other_uid,
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"setresuid(-1, -1, other)"},
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{&neg_one, &nobody_uid, &neg_one, &nobody_uid, &nobody_uid, &other_uid,
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"setresuid(-1, nobody -1)"},
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{&other_uid, &neg_one, &neg_one, &other_uid, &nobody_uid, &other_uid,
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"setresuid(other, -1 -1)"},
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/* Return to initial state */
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{&nobody_uid, &other_uid, &nobody_uid, &nobody_uid, &other_uid,
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&nobody_uid, "setresuid(nobody, other, nobody)"},
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};
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static void setup(void)
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{
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uid_t test_users[2];
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struct passwd *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, 2);
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other_uid = test_users[1];
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UID16_CHECK(nobody_uid, setresuid);
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UID16_CHECK(other_uid, setresuid);
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SAFE_SETRESUID(nobody_uid, other_uid, nobody_uid);
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}
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static void run(unsigned int n)
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{
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const struct test_data_t *tc = test_data + n;
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TST_EXP_PASS_SILENT(SETRESUID(*tc->real_uid, *tc->eff_uid,
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*tc->sav_uid), "%s", tc->test_msg);
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if (!TST_PASS)
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return;
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if (tst_check_resuid(tc->test_msg, *tc->exp_real_uid,
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*tc->exp_eff_uid, *tc->exp_sav_uid))
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tst_res(TPASS, "%s works as expected", tc->test_msg);
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}
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static struct tst_test test = {
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.test = run,
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.tcnt = ARRAY_SIZE(test_data),
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.setup = setup,
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.needs_root = 1,
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};
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