1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 * $FreeBSD$ 21 */ 22 23 /* 24 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "@(#)mmap_exec.c 1.3 07/05/25 SMI" 29 30 #include <stdio.h> 31 #include <sys/stat.h> 32 #include <fcntl.h> 33 #include <sys/types.h> 34 #include <sys/mman.h> 35 #include <errno.h> 36 37 extern int errno; 38 39 int 40 main(int argc, char *argv[]) 41 { 42 int fd; 43 struct stat statbuf; 44 45 if (argc != 2) { 46 (void) printf("Error: missing binary name.\n"); 47 (void) printf("Usage:\n\t%s <binary name>\n", 48 argv[0]); 49 return (1); 50 } 51 52 errno = 0; 53 54 if ((fd = open(argv[1], O_RDONLY)) < 0) { 55 perror("open"); 56 return (errno); 57 } 58 if (fstat(fd, &statbuf) < 0) { 59 perror("fstat"); 60 return (errno); 61 } 62 63 if (mmap(0, statbuf.st_size, 64 PROT_EXEC, MAP_SHARED, fd, 0) == MAP_FAILED) { 65 perror("mmap"); 66 return (errno); 67 } 68 69 return (0); 70 } 71