1#!/bin/sh 2 3# 4# Copyright (c) 2009 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# Test race between ISDOTDOT lookups and directory removal/rename 30 31# With lookup_shared=1 rename() will fail from time to time with ENOENT and 32# the following stat() will succed. 33 34# Test scenario by tegge 35 36. ../default.cfg 37 38here=`pwd` 39cd /tmp 40sed '1,/^EOF/d' < $here/$0 > rename.c 41mycc -o rename -Wall rename.c || exit 1 42rm -f rename.c 43 44rm -rf /tmp/rename.dir.* 45for i in `jot 10`; do 46 for j in `jot 10`; do 47 /tmp/rename & 48 done 49 for j in `jot 10`; do 50 wait 51 done 52done 53rm -rf /tmp/rename.dir.* /tmp/rename 54exit 0 55EOF 56#include <err.h> 57#include <fcntl.h> 58#include <libgen.h> 59#include <stdio.h> 60#include <stdlib.h> 61#include <string.h> 62#include <sys/stat.h> 63#include <sys/types.h> 64#include <sys/wait.h> 65#include <time.h> 66#include <unistd.h> 67 68#define RUNTIME 30 69 70static char dir1[128]; 71static char dir2[128]; 72 73int 74main(int argc, char **argv) 75{ 76 time_t start; 77 int status; 78 struct stat sb; 79 pid_t p; 80 81 sprintf(dir1, "rename.dir.%d", getpid()); 82 sprintf(dir2, "rename.dir.2.%d", getpid()); 83 if (mkdir(dir1, 0700) == -1) 84 err(1, "mkdir(%s)", dir1); 85 86 if (chdir(dir1) == -1) 87 err(1, "chdir(%s)", dir1); 88 if ((p = fork()) == -1) 89 err(1, "fork()"); 90 if (p == 0) { 91 setproctitle("child"); 92 if (chdir("..") == -1) 93 err(1, "chdir(%s)", ".."); 94 start = time(NULL); 95 while (time(NULL) - start < RUNTIME) { 96 if (rename(dir1, dir2) == -1) { 97 warn("rename(%s, %s)", dir1, dir2); 98 stat(dir1, &sb); 99 if (stat(dir1, &sb) == -1) 100 err(1, "stat(%s)", dir1); 101 else 102 errx(1, "stat(%s) succeeded!", dir1); 103 } 104 if (rename(dir2, dir1) == -1) { 105 warn("rename(%s, %s)", dir2, dir1); 106 stat(dir2, &sb); 107 if (stat(dir2, &sb) == -1) 108 err(1, "stat(%s)", dir2); 109 else 110 errx(1, "stat(%s) succeeded!", dir2); 111 } 112 } 113 _exit(0); 114 } else { 115 setproctitle("parent"); 116 start = time(NULL); 117 while (time(NULL) - start < RUNTIME) { 118 if (stat("..", &sb) == -1) 119 err(1, "stat(..)"); 120 } 121 } 122 if (waitpid(p, &status, 0) == -1) 123 err(1, "waitpid()"); 124 if (chdir("..") == -1) 125 err(1, "chdir(%s)", ".."); 126 if (rmdir(dir1) == -1) 127 err(1, "rmdir(%s)", dir1); 128 129 return (0); 130} 131