1#!/bin/sh 2# 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org> 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# https://reviews.freebsd.org/D35514 30# rename(2) version 31 32. ../default.cfg 33 34cat > /tmp/nlink4.c <<EOF 35#include <sys/stat.h> 36#include <ufs/ufs/dinode.h> 37#include <err.h> 38#include <errno.h> 39#include <fcntl.h> 40#include <stdio.h> 41#include <unistd.h> 42 43int 44main (void) { 45 int fd, i, mx; 46 char file[100]; 47 48 snprintf(file, sizeof(file), "f"); 49 if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 50 DEFFILEMODE)) == -1) 51 err(1, "creat(%s)", file); 52 close(fd); 53 54 mx = UFS_LINK_MAX - 1; /* UFS_LINK_MAX = 32767 */ 55 for (i = 0; i < mx; i++) { 56 snprintf(file, sizeof(file), "%d", i); 57 if (link("f", file) == -1) 58 err(1, "link(%s, %s)", "f", file); 59 60 } 61 62 /* The following link(2) must fail */ 63 i = mx; 64 snprintf(file, sizeof(file), "%d", i); 65 if (link("f", file) != -1) 66 err(1, "link(%s, %s)", "f", file); 67 if (errno != EMLINK) 68 err(1, "Must fail: link(%s, %s)", "f", file); 69 70 /* Must succeed */ 71 i = 0; 72 snprintf(file, sizeof(file), "%d", i); 73 if (unlink(file) == -1) 74 err(1, "unlink(%s)", file); 75 if (rename("1", "a") == -1) { 76 if (errno == EMLINK) 77 fprintf(stderr, "Unexpected EMLINK\n"); 78 err(1, "rename(%s, %s)", "1", "a"); 79 } 80 81 return (0); 82} 83EOF 84mycc -o /tmp/nlink4 -Wall -Wextra -O2 /tmp/nlink4.c || exit 1 85rm /tmp/nlink4.c 86 87set -e 88here=`pwd` 89mount | grep -q "on $mntpoint " && umount -f $mntpoint 90mdconfig -l | grep "md$mdstart " && mdconfig -d -u $mdstart 91mdconfig -a -t swap -s 1g -u $mdstart 92newfs -Un /dev/md$mdstart > /dev/null 93mount /dev/md$mdstart $mntpoint 94set +e 95 96cd $mntpoint 97/tmp/nlink4; s=$? 98n=`ls -a | wc -l` 99[ $s -ne 0 ] && echo "$n files" 100cd $here 101 102umount $mntpoint 103mdconfig -d -u $mdstart 104rm /tmp/nlink4 105exit $s 106