96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Linux Test Project, 2003-2021
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* Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
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* Copyright (c) International Business Machines Corp., 2001
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* 07/2001 Ported by Wayne Boyer
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*/
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/*\
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* [Description]
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*
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* Verify that fchown(2) invoked by super-user:
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* - clears setuid and setgid bits set on an executable file
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* - preserves setgid bit set on a non-group-executable file
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "tst_test.h"
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#include "compat_tst_16.h"
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#include "tst_safe_macros.h"
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#define FILE_MODE (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
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#define NEW_PERMS1 (S_IFREG|S_IRWXU|S_IRWXG|S_ISUID|S_ISGID)
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#define NEW_PERMS2 (S_IFREG|S_IRWXU|S_ISGID)
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#define EXP_PERMS (S_IFREG|S_IRWXU|S_IRWXG)
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#define TESTFILE1 "testfile1"
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#define TESTFILE2 "testfile2"
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static int fd1, fd2;
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struct test_case_t {
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int *fd;
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const char *filename;
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mode_t set_mode;
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mode_t exp_mode;
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} tc[] = {
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{&fd1, TESTFILE1, NEW_PERMS1, EXP_PERMS},
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{&fd2, TESTFILE2, NEW_PERMS2, NEW_PERMS2}
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};
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static void run(unsigned int i)
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{
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struct stat stat_buf;
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uid_t uid;
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gid_t gid;
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UID16_CHECK((uid = geteuid()), "fchown");
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GID16_CHECK((gid = getegid()), "fchown");
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SAFE_CHMOD(tc[i].filename, tc[i].set_mode);
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TST_EXP_PASS(FCHOWN(*tc[i].fd, uid, gid),
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"fchown(%i, %i, %i)", *tc[i].fd, uid, gid);
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SAFE_STAT(tc[i].filename, &stat_buf);
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if (stat_buf.st_uid != uid || stat_buf.st_gid != gid)
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tst_res(TFAIL, "%s: owner set to (uid=%d, gid=%d), expected (uid=%d, gid=%d)",
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tc[i].filename, stat_buf.st_uid, stat_buf.st_gid, uid, gid);
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if (stat_buf.st_mode != tc[i].exp_mode)
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tst_res(TFAIL, "%s: wrong mode permissions %#o, expected %#o",
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tc[i].filename, stat_buf.st_mode, tc[i].exp_mode);
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}
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static void setup(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(tc); i++)
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*tc[i].fd = SAFE_OPEN(tc[i].filename, O_RDWR | O_CREAT, FILE_MODE);
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}
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static void cleanup(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(tc); i++) {
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if (*tc[i].fd > 0)
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SAFE_CLOSE(*tc[i].fd);
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}
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tc),
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.needs_root = 1,
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test = run,
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};
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