FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/tests/zfs-tests/cmd/linux_dos_attributes/read_dos_attributes.c

     /*
      * This file and its contents are supplied under the terms of the
      * Common Development and Distribution License ("CDDL"), version 1.0.
      * You may only use this file in accordance with the terms of version
      * 1.0 of the CDDL.
      *
      * A full copy of the text of the CDDL should have accompanied this
      * source.  A copy of the CDDL is also available via the Internet at
      * http://www.illumos.org/license/CDDL.
     */
    
    /*
     * Copyright 2022 iXsystems, Inc.
     */
    
    /*
     * FreeBSD exposes additional file attributes via ls -o and chflags.
     * Under Linux, we provide ZFS_IOC_[GS]ETDOSFLAGS ioctl()s.
     *
     * This application is the equivalent to FreeBSD ls -lo $1 | awk '{print $5}'.
     */
    
    #include <err.h>
    #include <fcntl.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <stdbool.h>
    #include <sys/stat.h>
    #include <sys/types.h>
    #include <sys/ioctl.h>
    #include <sys/fs/zfs.h>
    #include "dos_attributes.h"
    
    int
    main(int argc, const char *const *argv)
    {
            if (argc != 2)
                    errx(EXIT_FAILURE, "usage: %s file", argv[0]);
    
            int fd = open(argv[1], O_RDONLY | O_CLOEXEC);
            if (fd == -1)
                    err(EXIT_FAILURE, "%s", argv[1]);
    
            uint64_t flags;
            if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &flags) == -1)
                    err(EXIT_FAILURE, "ZFS_IOC_GETDOSFLAGS");
    
            bool any = false;
            for (size_t i = 0; i < ARRAY_SIZE(all_dos_attributes); ++i)
                    if (flags & all_dos_attributes[i]) {
                            if (any)
                                    putchar(',');
                            (void) fputs(*all_dos_attribute_names[i], stdout);
                            any = true;
                    }
            if (any)
                    (void) putchar('\n');
            else
                    (void) puts("-");
    }

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