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3a03c96381
The commit replaces all findings of the link: http://www.opensolaris.org/os/licensing with this one: https://opensource.org/licenses/CDDL-1.0 Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: WHR <msl0000023508@gmail.com> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Closes #14625
129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/* SPDX-License-Identifier: CDDL-1.0 OR MPL-2.0 */
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (C) 2019 Aleksa Sarai <cyphar@cyphar.com>
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* Copyright (C) 2019 SUSE LLC
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*/
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/*
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* mv(1) doesn't currently support RENAME_{EXCHANGE,WHITEOUT} so this is a very
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* simple renameat2(2) wrapper for the OpenZFS self-tests.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/syscall.h>
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#ifndef SYS_renameat2
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#ifdef __NR_renameat2
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#define SYS_renameat2 __NR_renameat2
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#elif defined(__x86_64__)
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#define SYS_renameat2 316
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#elif defined(__i386__)
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#define SYS_renameat2 353
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#elif defined(__arm__) || defined(__aarch64__)
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#define SYS_renameat2 382
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#else
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#error "SYS_renameat2 not known for this architecture."
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#endif
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#endif
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#ifndef RENAME_NOREPLACE
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#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
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#endif
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#ifndef RENAME_EXCHANGE
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#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
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#endif
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#ifndef RENAME_WHITEOUT
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#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
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#endif
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/* glibc doesn't provide renameat2 wrapper, let's use our own */
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static int
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sys_renameat2(int olddirfd, const char *oldpath,
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int newdirfd, const char *newpath, unsigned int flags)
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{
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int ret = syscall(SYS_renameat2, olddirfd, oldpath, newdirfd, newpath,
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flags);
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return ((ret < 0) ? -errno : ret);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: renameat2 [-Cnwx] src dst\n");
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exit(1);
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}
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static void
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check(void)
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{
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int err = sys_renameat2(AT_FDCWD, ".", AT_FDCWD, ".", RENAME_EXCHANGE);
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exit(err == -ENOSYS);
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}
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int
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main(int argc, char **argv)
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{
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char *src, *dst;
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int ch, err;
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unsigned int flags = 0;
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while ((ch = getopt(argc, argv, "Cnwx")) >= 0) {
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switch (ch) {
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case 'C':
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check();
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break;
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case 'n':
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flags |= RENAME_NOREPLACE;
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break;
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case 'w':
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flags |= RENAME_WHITEOUT;
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break;
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case 'x':
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flags |= RENAME_EXCHANGE;
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break;
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default:
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usage();
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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src = argv[0];
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dst = argv[1];
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err = sys_renameat2(AT_FDCWD, src, AT_FDCWD, dst, flags);
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if (err < 0)
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fprintf(stderr, "renameat2: %s", strerror(-err));
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return (err != 0);
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}
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