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/*
* 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 equivalent to FreeBSD chflags.
*/
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/fs/zfs.h>
#include "dos_attributes.h"
int
main(int argc, const char *const *argv)
{
if (argc != 3)
errx(EXIT_FAILURE, "usage: %s flag file", argv[0]);
bool unset = false;
uint64_t attr = 0;
const char *flag = argv[1];
if (strcmp(flag, "0") == 0)
;
else if (strcmp(flag, SU_NODUMP) == 0)
attr = ZFS_NODUMP;
else if (strcmp(flag, UNSET_NODUMP) == 0) {
attr = ZFS_NODUMP;
unset = true;
} else {
if (strncmp(flag, "no", 2) == 0) {
unset = true;
flag += 2;
}
for (size_t i = 0; i < ARRAY_SIZE(all_dos_attribute_names); ++i)
for (const char *const *nm = all_dos_attribute_names[i];
*nm; ++nm)
if (strcmp(flag, *nm) == 0) {
attr = all_dos_attributes[i];
goto found;
}
errx(EXIT_FAILURE, "%s: unknown flag", argv[1]);
found:;
}
int fd = open(argv[2], O_RDWR | O_APPEND | O_CLOEXEC);
if (fd == -1)
err(EXIT_FAILURE, "%s", argv[2]);
uint64_t flags;
if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &flags) == -1)
err(EXIT_FAILURE, "ZFS_IOC_GETDOSFLAGS");
if (attr == 0)
flags = 0;
else if (unset)
flags &= ~attr;
else
flags |= attr;
if (ioctl(fd, ZFS_IOC_SETDOSFLAGS, &flags) == -1)
err(EXIT_FAILURE, "ZFS_IOC_SETDOSFLAGS");
uint64_t newflags;
if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &newflags) == -1)
err(EXIT_FAILURE, "second ZFS_IOC_GETDOSFLAGS");
if (newflags != flags)
errx(EXIT_FAILURE, "expecting %#" PRIx64 ", got %#" PRIx64
"; %ssetting %#" PRIx64 "",
flags, newflags, unset ? "un" : "", attr);
(void) printf("%#" PRIx64 "\n", flags);
}
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