1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# https://reviews.freebsd.org/D35514 31# link() version 32 33. ../default.cfg 34 35cat > /tmp/nlink3.c <<EOF 36#include <sys/stat.h> 37#include <ufs/ufs/dinode.h> 38#include <err.h> 39#include <errno.h> 40#include <fcntl.h> 41#include <stdio.h> 42#include <unistd.h> 43 44int 45main (void) { 46 int fd, i, mx; 47 char file[100]; 48 49 snprintf(file, sizeof(file), "f"); 50 if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 51 DEFFILEMODE)) == -1) 52 err(1, "creat(%s)", file); 53 close(fd); 54 55 mx = UFS_LINK_MAX - 1; /* UFS_LINK_MAX = 32767 */ 56 for (i = 0; i < mx; i++) { 57 snprintf(file, sizeof(file), "%d", i); 58 if (link("f", file) == -1) 59 err(1, "link(%s, %s)", "f", file); 60 61 } 62 63 /* The following link(2) must fail */ 64 i = mx; 65 snprintf(file, sizeof(file), "%d", i); 66 if (link("f", file) != -1) 67 err(1, "link(%s, %s)", "f", file); 68 if (errno != EMLINK) 69 err(1, "Must fail: link(%s, %s)", "f", file); 70 71 i = 0; 72 snprintf(file, sizeof(file), "%d", i); 73 if (unlink(file) == -1) 74 err(1, "unlink(%s)", file); 75 76 /* Must succeed */ 77 i = mx; 78 snprintf(file, sizeof(file), "%d", i); 79 if (link("f", file) == -1) 80 err(1, "link(%s, %s)", "f", file); 81 82 return (0); 83} 84EOF 85mycc -o /tmp/nlink3 -Wall -Wextra -O2 /tmp/nlink3.c || exit 1 86rm /tmp/nlink3.c 87 88set -e 89here=`pwd` 90mount | grep -q "on $mntpoint " && umount -f $mntpoint 91mdconfig -l | grep "md$mdstart " && mdconfig -d -u $mdstart 92mdconfig -a -t swap -s 1g -u $mdstart 93newfs -Un /dev/md$mdstart > /dev/null 94mount /dev/md$mdstart $mntpoint 95set +e 96 97cd $mntpoint 98/tmp/nlink3; s=$? 99n=`ls -a | wc -l` 100[ $s -ne 0 ] && echo "$n files" 101cd $here 102 103umount $mntpoint 104mdconfig -d -u $mdstart 105rm /tmp/nlink3 106exit $s 107