96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
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/*
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* This file and its contents are supplied under the terms of the
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* Common Development and Distribution License ("CDDL"), version 1.0.
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* You may only use this file in accordance with the terms of version
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* 1.0 of the CDDL.
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*
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* A full copy of the text of the CDDL should have accompanied this
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* source. A copy of the CDDL is also available via the Internet at
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* http://www.illumos.org/license/CDDL.
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*/
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/*
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* Copyright 2022 iXsystems, Inc.
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*/
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/*
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* FreeBSD exposes additional file attributes via ls -o and chflags.
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* Under Linux, we provide ZFS_IOC_[GS]ETDOSFLAGS ioctl()s.
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*
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* This application is equivalent to FreeBSD chflags.
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*/
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/fs/zfs.h>
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#include "dos_attributes.h"
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int
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main(int argc, const char *const *argv)
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{
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if (argc != 3)
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errx(EXIT_FAILURE, "usage: %s flag file", argv[0]);
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bool unset = false;
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uint64_t attr = 0;
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const char *flag = argv[1];
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if (strcmp(flag, "0") == 0)
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;
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else if (strcmp(flag, SU_NODUMP) == 0)
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attr = ZFS_NODUMP;
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else if (strcmp(flag, UNSET_NODUMP) == 0) {
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attr = ZFS_NODUMP;
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unset = true;
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} else {
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if (strncmp(flag, "no", 2) == 0) {
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unset = true;
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flag += 2;
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}
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for (size_t i = 0; i < ARRAY_SIZE(all_dos_attribute_names); ++i)
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for (const char *const *nm = all_dos_attribute_names[i];
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*nm; ++nm)
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if (strcmp(flag, *nm) == 0) {
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attr = all_dos_attributes[i];
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goto found;
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}
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errx(EXIT_FAILURE, "%s: unknown flag", argv[1]);
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found:;
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}
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int fd = open(argv[2], O_RDWR | O_APPEND | O_CLOEXEC);
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if (fd == -1)
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err(EXIT_FAILURE, "%s", argv[2]);
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uint64_t flags;
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if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &flags) == -1)
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err(EXIT_FAILURE, "ZFS_IOC_GETDOSFLAGS");
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if (attr == 0)
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flags = 0;
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else if (unset)
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flags &= ~attr;
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else
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flags |= attr;
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if (ioctl(fd, ZFS_IOC_SETDOSFLAGS, &flags) == -1)
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err(EXIT_FAILURE, "ZFS_IOC_SETDOSFLAGS");
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uint64_t newflags;
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if (ioctl(fd, ZFS_IOC_GETDOSFLAGS, &newflags) == -1)
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err(EXIT_FAILURE, "second ZFS_IOC_GETDOSFLAGS");
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if (newflags != flags)
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errx(EXIT_FAILURE, "expecting %#" PRIx64 ", got %#" PRIx64
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"; %ssetting %#" PRIx64 "",
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flags, newflags, unset ? "un" : "", attr);
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(void) printf("%#" PRIx64 "\n", flags);
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}
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