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 <sys/param.h> 29 #include <sys/mman.h> 30 #include <sys/stat.h> 31 #include <err.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.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 int64_t bl; 49 int64_t in; 50 int64_t reserve_bl; 51 int64_t reserve_in; 52 int freespace; 53 54 if (nb == 0) { 55 getdf(&bl, &in); 56 57 /* Resource requirements: */ 58 reserve_in = 2 * op->incarnations; 59 reserve_bl = 20480 * op->incarnations; 60 freespace = (reserve_bl <= bl && reserve_in <= in); 61 if (!freespace) 62 reserve_bl = reserve_in = 0; 63 64 if (op->verbose > 1) 65 printf("mmap(incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n", 66 op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in); 67 reservedf(reserve_bl, reserve_in); 68 putval(freespace); 69 } else { 70 freespace = getval(); 71 } 72 if (!freespace) 73 exit(0); 74 umask(0); 75 76 sprintf(path,"%s.%05d", getprogname(), getpid()); 77 if (mkdir(path, 0770) < 0) 78 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__); 79 80 if (chdir(path) == -1) 81 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__); 82 83 return (0); 84 } 85 86 void 87 cleanup(void) 88 { 89 (void)chdir(".."); 90 if (rmdir(path) == -1) { 91 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__); 92 } 93 } 94 95 int 96 test(void) 97 { 98 struct stat statbuf; 99 pid_t pid; 100 char file[128]; 101 int fdin, fdout; 102 int i; 103 char *src, *dst; 104 105 pid = getpid(); 106 for (i = 0; i < 100 && done_testing == 0; i++) { 107 sprintf(file,"p%05d.%05d", pid, i); 108 109 if ((fdin = open(INPUTFILE, O_RDONLY)) < 0) 110 err(1, INPUTFILE); 111 112 if ((fdout = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) 113 err(1, "%s", file); 114 115 if (fstat(fdin, &statbuf) < 0) 116 err(1, "fstat error"); 117 118 if (lseek(fdout, statbuf.st_size - 1, SEEK_SET) == -1) 119 err(1, "lseek error"); 120 121 /* write a dummy byte at the last location */ 122 if (write(fdout, "", 1) != 1) 123 err(1, "write error"); 124 125 if ((src = mmap(0, statbuf.st_size, PROT_READ, MAP_SHARED, fdin, 0)) == 126 (caddr_t) - 1) 127 err(1, "mmap error for input"); 128 129 if ((dst = mmap(0, statbuf.st_size, PROT_READ | PROT_WRITE, 130 MAP_SHARED, fdout, 0)) == (caddr_t) - 1) 131 err(1, "mmap error for output"); 132 133 memcpy(dst, src, statbuf.st_size); 134 135 if (munmap(src, statbuf.st_size) == -1) 136 err(1, "munmap"); 137 close(fdin); 138 139 if (munmap(dst, statbuf.st_size) == -1) 140 err(1, "munmap"); 141 close(fdout); 142 143 if (unlink(file) == -1) 144 err(3, "unlink(%s)", file); 145 } 146 147 return (0); 148 } 149