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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 iXsystems, Inc.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* Test for correct behavior of DOS mode READONLY flag on a file.
* We should be able to open a file RW, set READONLY, and still write to the fd.
*/
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#ifdef __linux__
#include <stdint.h>
#include <sys/fs/zfs.h>
#endif
int
main(int argc, const char *argv[])
{
const char *buf = "We should be allowed to write this to the fd.\n";
const char *path;
int fd;
if (argc != 2) {
fprintf(stderr, "usage: %s PATH\n", argv[0]);
return (EXIT_FAILURE);
}
path = argv[1];
fd = open(path, O_CREAT|O_RDWR, 0777);
if (fd == -1)
err(EXIT_FAILURE, "%s: open failed", path);
#ifdef __linux__
uint64_t dosflags = ZFS_READONLY;
if (ioctl(fd, ZFS_IOC_SETDOSFLAGS, &dosflags) == -1)
err(EXIT_FAILURE, "%s: ZFS_IOC_SETDOSFLAGS failed", path);
#else
if (chflags(path, UF_READONLY) == -1)
err(EXIT_FAILURE, "%s: chflags failed", path);
#endif
if (write(fd, buf, strlen(buf)) == -1)
err(EXIT_FAILURE, "%s: write failed", path);
if (close(fd) == -1)
err(EXIT_FAILURE, "%s: close failed", path);
return (EXIT_SUCCESS);
}
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