1 /*- 2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <unistd.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <fcntl.h> 32 #include <sys/stat.h> 33 #include <sys/param.h> 34 #include <sys/mman.h> 35 #include <err.h> 36 #include <string.h> 37 #include <errno.h> 38 39 #include "stress.h" 40 41 static char path[128]; 42 43 #define INPUTFILE "/bin/date" 44 45 int 46 setup(int nb) 47 { 48 umask(0); 49 50 sprintf(path,"%s.%05d", getprogname(), getpid()); 51 if (mkdir(path, 0770) < 0) 52 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__); 53 54 if (chdir(path) == -1) 55 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__); 56 57 return (0); 58 } 59 60 void 61 cleanup(void) 62 { 63 (void)chdir(".."); 64 if (rmdir(path) == -1) { 65 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__); 66 } 67 68 } 69 70 int 71 test(void) 72 { 73 int i; 74 pid_t pid; 75 char file[128]; 76 int fdin, fdout; 77 char *src, *dst; 78 struct stat statbuf; 79 80 pid = getpid(); 81 for (i = 0; i < 100 && done_testing == 0; i++) { 82 sprintf(file,"p%05d.%05d", pid, i); 83 84 if ((fdin = open(INPUTFILE, O_RDONLY)) < 0) 85 err(1, INPUTFILE); 86 87 if ((fdout = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) 88 err(1, "%s", file); 89 90 if (fstat(fdin, &statbuf) < 0) 91 err(1, "fstat error"); 92 93 if (lseek(fdout, statbuf.st_size - 1, SEEK_SET) == -1) 94 err(1, "lseek error"); 95 96 /* write a dummy byte at the last location */ 97 if (write(fdout, "", 1) != 1) 98 err(1, "write error"); 99 100 if ((src = mmap(0, statbuf.st_size, PROT_READ, MAP_SHARED, fdin, 0)) == 101 (caddr_t) - 1) 102 err(1, "mmap error for input"); 103 104 if ((dst = mmap(0, statbuf.st_size, PROT_READ | PROT_WRITE, 105 MAP_SHARED, fdout, 0)) == (caddr_t) - 1) 106 err(1, "mmap error for output"); 107 108 memcpy(dst, src, statbuf.st_size); 109 110 111 if (munmap(src, statbuf.st_size) == -1) 112 err(1, "munmap"); 113 close(fdin); 114 115 if (munmap(dst, statbuf.st_size) == -1) 116 err(1, "munmap"); 117 close(fdout); 118 119 if (unlink(file) == -1) 120 err(3, "unlink(%s)", file); 121 } 122 123 124 return (0); 125 } 126