/*      $OpenBSD: t_umask.c,v 1.2 2021/12/13 16:56:48 deraadt Exp $     */
/* $NetBSD: t_umask.c,v 1.2 2017/01/13 19:34:19 christos Exp $ */

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jukka Ruohonen.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "macros.h"

#include <sys/stat.h>
#include <sys/wait.h>

#include "atf-c.h"
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static const char path[] = "umask";
static const mode_t mask[] = {
        S_IRWXU,
        S_IRUSR,
        S_IWUSR,
        S_IXUSR,
        S_IRWXG,
        S_IRGRP,
        S_IWGRP,
        S_IXGRP,
        S_IRWXO,
        S_IROTH,
        S_IWOTH,
        S_IXOTH
};

ATF_TC_WITH_CLEANUP(umask_fork);
ATF_TC_HEAD(umask_fork, tc)
{
        atf_tc_set_md_var(tc, "descr", "Check that umask(2) is inherited");
}

ATF_TC_BODY(umask_fork, tc)
{
        mode_t mode;
        pid_t pid;
        size_t i;
        int sta;

        for (i = 0; i < __arraycount(mask) - 1; i++) {

                (void)umask(mask[i] | mask[i + 1]);

                pid = fork();

                if (pid < 0)
                        continue;

                if (pid == 0) {

                        mode = umask(mask[i]);

                        if (mode != (mask[i] | mask[i + 1]))
                                _exit(EXIT_FAILURE);

                        _exit(EXIT_SUCCESS);
                }

                (void)wait(&sta);

                if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
                        goto fail;
        }

        return;

fail:
        (void)umask(S_IWGRP | S_IWOTH);

        atf_tc_fail("umask(2) was not inherited");
}

ATF_TC_CLEANUP(umask_fork, tc)
{
        (void)umask(S_IWGRP | S_IWOTH);
}

ATF_TC_WITH_CLEANUP(umask_open);
ATF_TC_HEAD(umask_open, tc)
{
        atf_tc_set_md_var(tc, "descr", "A basic test of open(2) and umask(2)");
}

ATF_TC_BODY(umask_open, tc)
{
        const char *str = NULL;
        struct stat st;
        size_t i;
        int fd;

        for (i = 0; i < __arraycount(mask); i++) {

                (void)umask(mask[i]);

                fd = open(path, O_RDWR | O_CREAT, 0777);

                if (fd < 0)
                        continue;

                (void)close(fd);
                (void)memset(&st, 0, sizeof(struct stat));

                if (stat(path, &st) != 0) {
                        str = "failed to stat(2)";
                        goto out;
                }

                if ((st.st_mode & mask[i]) != 0) {
                        str = "invalid umask(2)";
                        goto out;
                }

                if (unlink(path) != 0) {
                        str = "failed to unlink(2)";
                        goto out;
                }

        }

out:
        (void)umask(S_IWGRP | S_IWOTH);

        if (str != NULL)
                atf_tc_fail("%s", str);
}

ATF_TC_CLEANUP(umask_open, tc)
{
        (void)umask(S_IWGRP | S_IWOTH);
        (void)unlink(path);
}

ATF_TC_WITH_CLEANUP(umask_previous);
ATF_TC_HEAD(umask_previous, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test the return value from umask(2)");
}

ATF_TC_BODY(umask_previous, tc)
{
        mode_t mode;
        size_t i;

        for (i = 0; i < __arraycount(mask); i++) {

                mode = umask(mask[i]);
                mode = umask(mask[i]);

                if (mode != mask[i])
                        goto fail;
        }

        return;

fail:
        (void)umask(S_IWGRP | S_IWOTH);

        atf_tc_fail("umask(2) did not return the previous mask");
}

ATF_TC_CLEANUP(umask_previous, tc)
{
        (void)umask(S_IWGRP | S_IWOTH);
}

ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, umask_fork);
        ATF_TP_ADD_TC(tp, umask_open);
        ATF_TP_ADD_TC(tp, umask_previous);

        return atf_no_error();
}