131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* Ported by John George
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*/
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/*
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* Test that setregid() fails and sets the proper errno values when a
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* non-root user attemps to change the real or effective group id to a
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* value other than the current gid or the current effective gid.
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*/
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#include <errno.h>
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#include <pwd.h>
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#include <grp.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#include "compat_tst_16.h"
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static gid_t neg_one = -1;
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static struct passwd *ltpuser;
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static struct group ltpgroup, root, bin;
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/*
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* The following structure contains all test data. Each structure in the array
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* is used for a separate test. The tests are executed in the for loop below.
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*/
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static struct tcase {
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gid_t *real_gid;
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gid_t *eff_gid;
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int exp_errno;
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struct group *exp_real_usr;
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struct group *exp_eff_usr;
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char *test_msg;
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} tcases[] = {
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{
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&neg_one, &root.gr_gid, EPERM, <pgroup, <pgroup,
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"After setregid(-1, root),"}, {
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&neg_one, &bin.gr_gid, EPERM, <pgroup, <pgroup,
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"After setregid(-1, bin)"}, {
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&root.gr_gid, &neg_one, EPERM, <pgroup, <pgroup,
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"After setregid(root,-1),"}, {
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&bin.gr_gid, &neg_one, EPERM, <pgroup, <pgroup,
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"After setregid(bin, -1),"}, {
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&root.gr_gid, &bin.gr_gid, EPERM, <pgroup, <pgroup,
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"After setregid(root, bin)"}, {
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&bin.gr_gid, &root.gr_gid, EPERM, <pgroup, <pgroup,
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"After setregid(bin, root),"}
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};
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static struct group get_group_by_name(const char *name)
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{
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struct group *ret = SAFE_GETGRNAM(name);
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GID16_CHECK(ret->gr_gid, setregid);
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return *ret;
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}
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static struct group get_group_by_gid(gid_t gid)
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{
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struct group *ret = SAFE_GETGRGID(gid);
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GID16_CHECK(ret->gr_gid, setregid);
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return *ret;
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}
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void gid_verify(struct group *rg, struct group *eg, char *when)
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{
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if ((getgid() != rg->gr_gid) || (getegid() != eg->gr_gid)) {
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tst_res(TFAIL, "ERROR: %s real gid = %d; effective gid = %d",
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when, getgid(), getegid());
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tst_res(TINFO, "Expected: real gid = %d; effective gid = %d",
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rg->gr_gid, eg->gr_gid);
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return;
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}
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tst_res(TPASS, "real or effective gid wasn't modified as expected");
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}
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static void run(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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/* Set the real or effective group id */
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TEST(SETREGID(*tc->real_gid, *tc->eff_gid));
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if (TST_RET == -1) {
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if (tc->exp_errno == TST_ERR) {
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tst_res(TPASS | TTERRNO,
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"setregid(%d, %d) failed as expected",
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*tc->real_gid, *tc->eff_gid);
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} else {
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tst_res(TFAIL | TTERRNO,
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"setregid(%d, %d) failed unexpectedly, expected %s",
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*tc->real_gid, *tc->eff_gid,
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tst_strerrno(tc->exp_errno));
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}
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} else {
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tst_res(TFAIL,
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"setregid(%d, %d) did not fail (ret: %ld) as expected (ret: -1).",
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*tc->real_gid, *tc->eff_gid, TST_RET);
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}
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gid_verify(tc->exp_real_usr, tc->exp_eff_usr, tc->test_msg);
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}
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static void setup(void)
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{
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ltpuser = SAFE_GETPWNAM("nobody");
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SAFE_SETGID(ltpuser->pw_gid);
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SAFE_SETUID(ltpuser->pw_uid);
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root = get_group_by_name("root");
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ltpgroup = get_group_by_gid(ltpuser->pw_gid);
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bin = get_group_by_name("bin");
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.needs_root = 1,
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.test = run,
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.setup = setup,
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};
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