1#!/bin/sh 2 3# 4# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 30 31# Variation of rename6.sh. Cache problem of "to" file name seen. 32 33. ../default.cfg 34 35here=`pwd` 36cd /tmp 37sed '1,/^EOF/d' < $here/$0 > rename9.c 38mycc -o rename9 -Wall -Wextra -O2 rename9.c 39rm -f rename9.c 40cd $here 41 42mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 43mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 44mdconfig -a -t swap -s 2g -u $mdstart 45newfs $newfs_flags md$mdstart > /dev/null 46mount /dev/md$mdstart $mntpoint 47rm -rf $mntpoint/.snap 48chmod 777 $mntpoint 49 50(while true; do ls -lRi $mntpoint > /dev/null 2>&1; done) & 51su $testuser -c "cd $mntpoint; /tmp/rename9" 52kill $! > /dev/null 2>&1 53wait 54ls -ilR $mntpoint | egrep -v "^total " 55 56while mount | grep -q md$mdstart; do 57 umount $mntpoint || sleep 1 58done 59mdconfig -d -u $mdstart 60rm -f /tmp/rename9 61exit 62EOF 63#include <err.h> 64#include <errno.h> 65#include <fcntl.h> 66#include <sched.h> 67#include <signal.h> 68#include <stdio.h> 69#include <stdlib.h> 70#include <strings.h> 71#include <sys/param.h> 72#include <sys/stat.h> 73#include <sys/time.h> 74#include <sys/wait.h> 75#include <time.h> 76#include <unistd.h> 77 78pid_t spid; 79char *fromFile = "fromFile.log"; 80char toFile[128]; 81 82void 83cleanup() 84{ 85 kill(spid, SIGINT); 86} 87 88static void 89statFrom() 90{ 91 struct stat sb; 92 93 setproctitle("Stat"); 94 for (;;) { 95 stat(fromFile, &sb); 96 } 97} 98 99int 100main(void) 101{ 102 struct stat fb, tb, fa, ta; 103 int fd, i; 104 105 if ((spid = fork()) == 0) 106 statFrom(); 107 108 setproctitle("main"); 109 atexit(cleanup); 110 for (i = 0;i < 100000; i++) { 111 bzero(&fb, sizeof(fb)); 112 bzero(&tb, sizeof(tb)); 113 bzero(&fa, sizeof(fa)); 114 bzero(&ta, sizeof(ta)); 115 116 if ((fd = open(fromFile, O_RDWR | O_CREAT | O_TRUNC, 0644)) 117 == -1) 118 err(1, "creat(%s)", fromFile); 119 close(fd); 120 121 sprintf(toFile, "toFile.log.%05d", i); 122 if ((fd = open(toFile, O_RDWR | O_CREAT | O_TRUNC, 0644)) 123 == -1) 124 err(1, "creat(%s)", toFile); 125 write(fd, "xxx", 3); 126 close(fd); 127 128 stat(fromFile, &fb); 129 stat(toFile, &tb); 130 if (rename(fromFile, toFile) == -1) 131 warn("rename(%s, %s)", fromFile, toFile); 132 stat(fromFile, &fa); 133 if (stat(toFile, &ta) == -1) 134 err(1, "stat(%s)", toFile); 135 136 if (tb.st_ino == ta.st_ino) { 137 fprintf(stderr, "FAIL: old and new \"To\" inode " 138 "number is identical\n"); 139 fprintf(stderr, "stat() before the rename():\n"); 140 fprintf(stderr, 141 "%-16s: ino = %4ju, nlink = %ju, size = %jd\n", 142 fromFile, (uintmax_t)fb.st_ino, (uintmax_t)fb.st_nlink, 143 fb.st_blocks); 144 fprintf(stderr, 145 "%-16s: ino = %4ju, nlink = %ju, size = %jd\n", 146 toFile, (uintmax_t)tb.st_ino, (uintmax_t)tb.st_nlink, 147 tb.st_blocks); 148 fprintf(stderr, "\nstat() after the rename():\n"); 149 if (fa.st_ino != 0) 150 fprintf(stderr, 151 "%-16s: ino = %4ju, nlink = %ju, size = " 152 "%jd\n", fromFile, (uintmax_t)fa.st_ino, 153 (uintmax_t)fa.st_nlink, fa.st_blocks); 154 fprintf(stderr, 155 "%-16s: ino = %4ju, nlink = %ju, size = %jd\n", 156 toFile, (uintmax_t)ta.st_ino, (uintmax_t)ta.st_nlink, 157 ta.st_blocks); 158 kill(spid, SIGINT); 159 exit(1); 160 } 161 unlink(toFile); 162 } 163 164 kill(spid, SIGINT); 165 wait(NULL); 166 167 return (0); 168} 169