1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 iXsystems, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * Test for correct behavior of DOS mode READONLY flag on a file. 28 * We should be able to open a file RW, set READONLY, and still write to the fd. 29 */ 30 31 #include <sys/stat.h> 32 #include <err.h> 33 #include <errno.h> 34 #include <fcntl.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #ifdef __linux__ 40 #include <stdint.h> 41 #include <sys/fs/zfs.h> 42 #endif 43 44 int 45 main(int argc, const char *argv[]) 46 { 47 const char *buf = "We should be allowed to write this to the fd.\n"; 48 const char *path; 49 int fd; 50 51 if (argc != 2) { 52 fprintf(stderr, "usage: %s PATH\n", argv[0]); 53 return (EXIT_FAILURE); 54 } 55 path = argv[1]; 56 fd = open(path, O_CREAT|O_RDWR, 0777); 57 if (fd == -1) 58 err(EXIT_FAILURE, "%s: open failed", path); 59 #ifdef __linux__ 60 uint64_t dosflags = ZFS_READONLY; 61 if (ioctl(fd, ZFS_IOC_SETDOSFLAGS, &dosflags) == -1) 62 err(EXIT_FAILURE, "%s: ZFS_IOC_SETDOSFLAGS failed", path); 63 #else 64 if (chflags(path, UF_READONLY) == -1) 65 err(EXIT_FAILURE, "%s: chflags failed", path); 66 #endif 67 if (write(fd, buf, strlen(buf)) == -1) 68 err(EXIT_FAILURE, "%s: write failed", path); 69 if (close(fd) == -1) 70 err(EXIT_FAILURE, "%s: close failed", path); 71 return (EXIT_SUCCESS); 72 } 73