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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 allows to update and retreive additional file level attributes.
* For Linux, two IOCTLs have been added to update and retrieve additional
* level attributes.
*
* This application updates additional file level attributes on a given
* file. FreeBSD keywords can be used to specify the flag.
*
* Usage: 'write_dos_attributes flag filepath'
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <err.h>
#include <sys/fs/zfs.h>
#include <string.h>
#include <ctype.h>
#define SU_ARCH_SHORT "arch"
#define SU_ARCH_FULL "archived"
#define SU_NODUMP "nodump"
#define SU_APPEND_SHORT "sappnd"
#define SU_APPEND_FULL "sappend"
#define SU_IMMUTABLE "schg"
#define SU_IMMUTABLE_SHORT "schange"
#define SU_IMMUTABLE_FULL "simmutable"
#define SU_UNLINK_SHORT "sunlnk"
#define SU_UNLINK_FULL "sunlink"
#define U_APPEND_SHORT "uappnd"
#define U_APPEND_FULL "uappend"
#define U_ARCH_SHORT "uarch"
#define U_ARCH_FULL "uarchive"
#define U_IMMUTABLE "uchg"
#define U_IMMUTABLE_SHORT "uchange"
#define U_IMMUTABLE_FULL "uimmutable"
#define U_HIDDEN_SHORT "hidden"
#define U_HIDDEN_FULL "uhidden"
#define U_OFFLINE_SHORT "offline"
#define U_OFFLINE_FULL "uoffline"
#define U_RDONLY "rdonly"
#define U_RDONLY_SHORT "urdonly"
#define U_RDONLY_FULL "readonly"
#define U_SPARSE_SHORT "sparse"
#define U_SPARSE_FULL "usparse"
#define U_SYSTEM_SHORT "system"
#define U_SYSTEM_FULL "usystem"
#define U_REPARSE_SHORT "reparse"
#define U_REPARSE_FULL "ureparse"
#define U_UNLINK_SHORT "uunlnk"
#define U_UNLINK_FULL "uunlink"
#define UNSET_NODUMP "dump"
#define IS_NO(s) (s[0] == 'n' && s[1] == 'o')
uint64_t str_to_attribute(char *str);
uint64_t
str_to_attribute(char *str)
{
if ((strcmp(str, SU_ARCH_SHORT) == 0) ||
(strcmp(str, SU_ARCH_FULL) == 0) ||
(strcmp(str, U_ARCH_SHORT) == 0) ||
(strcmp(str, U_ARCH_FULL) == 0))
return (ZFS_ARCHIVE);
else if ((strcmp(str, SU_APPEND_SHORT) == 0) ||
(strcmp(str, SU_APPEND_FULL) == 0) ||
(strcmp(str, U_APPEND_SHORT) == 0) ||
(strcmp(str, U_APPEND_FULL) == 0))
return (ZFS_APPENDONLY);
else if ((strcmp(str, SU_IMMUTABLE) == 0) ||
(strcmp(str, SU_IMMUTABLE_SHORT) == 0) ||
(strcmp(str, SU_IMMUTABLE_FULL) == 0))
return (ZFS_IMMUTABLE);
else if ((strcmp(str, SU_UNLINK_SHORT) == 0) ||
(strcmp(str, SU_UNLINK_FULL) == 0) ||
(strcmp(str, U_UNLINK_SHORT) == 0) ||
(strcmp(str, SU_UNLINK_FULL) == 0))
return (ZFS_NOUNLINK);
else if ((strcmp(str, U_HIDDEN_SHORT) == 0) ||
(strcmp(str, U_HIDDEN_FULL) == 0))
return (ZFS_HIDDEN);
else if ((strcmp(str, U_OFFLINE_SHORT) == 0) ||
(strcmp(str, U_OFFLINE_FULL) == 0))
return (ZFS_OFFLINE);
else if ((strcmp(str, U_RDONLY) == 0) ||
(strcmp(str, U_RDONLY_SHORT) == 0) ||
(strcmp(str, U_RDONLY_FULL) == 0))
return (ZFS_READONLY);
else if ((strcmp(str, U_SPARSE_SHORT) == 0) ||
(strcmp(str, U_SPARSE_FULL) == 0))
return (ZFS_SPARSE);
else if ((strcmp(str, U_SYSTEM_SHORT) == 0) ||
(strcmp(str, U_SYSTEM_FULL) == 0))
return (ZFS_SYSTEM);
else if ((strcmp(str, U_REPARSE_SHORT) == 0) ||
(strcmp(str, U_REPARSE_FULL) == 0))
return (ZFS_REPARSE);
return (-1);
}
int
main(int argc, const char * const argv[])
{
if (argc != 3)
errx(EXIT_FAILURE, "Usage: %s flag filepath", argv[0]);
uint8_t unset, unset_all;
uint64_t attribute, dosflags;
char *flag = strdup(argv[1]);
unset = unset_all = 0;
attribute = dosflags = 0;
// convert the flag to lower case
for (int i = 0; i < strlen(argv[1]); ++i)
flag[i] = tolower((unsigned char) flag[i]);
// check if flag starts with 'no'
if (IS_NO(flag)) {
if (strcmp(flag, SU_NODUMP) == 0) {
attribute = ZFS_NODUMP;
} else {
attribute = str_to_attribute(flag + 2);
unset = 1;
}
}
// check if '0' was passed
else if (strcmp(flag, "0") == 0) {
unset_all = 1;
}
// check if the flag is 'dump'
else if (strcmp(flag, UNSET_NODUMP) == 0) {
attribute = ZFS_NODUMP;
unset = 1;
} else {
attribute = str_to_attribute(flag);
}
if (attribute == -1)
errx(EXIT_FAILURE, "Invalid Flag %s", argv[1]);
int fd = open(argv[2], O_RDWR | O_APPEND);
if (fd < 0)
err(EXIT_FAILURE, "Failed to open %s", argv[2]);
if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &dosflags) == -1)
err(EXIT_FAILURE, "ZFS_IOC_GETDOSFLAGS failed");
if (unset == 0 && attribute != 0)
attribute |= dosflags;
else if (unset == 1 && attribute != 0)
attribute = dosflags & (~attribute);
else if (unset_all == 1)
attribute = 0;
// set the attribute/s
if (ioctl(fd, ZFS_IOC_SETDOSFLAGS, &attribute) == -1)
err(EXIT_FAILURE, "ZFS_IOC_SETDOSFLAGS failed");
// get the attributes to confirm
dosflags = -1;
if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &dosflags) == -1)
err(EXIT_FAILURE, "ZFS_IOC_GETDOSFLAGS failed");
(void) close(fd);
if (dosflags != attribute)
errx(EXIT_FAILURE, "Could not set %s attribute", argv[1]);
(void) printf("New Dos Flags: 0x%llx\n", (u_longlong_t)dosflags);
return (EXIT_SUCCESS);
}
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