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 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "@(#)mmap_exec.c 1.3 07/05/25 SMI" 28 29 #include <stdio.h> 30 #include <sys/stat.h> 31 #include <fcntl.h> 32 #include <sys/types.h> 33 #include <sys/mman.h> 34 #include <errno.h> 35 36 extern int errno; 37 38 int 39 main(int argc, char *argv[]) 40 { 41 int fd; 42 struct stat statbuf; 43 44 if (argc != 2) { 45 (void) printf("Error: missing binary name.\n"); 46 (void) printf("Usage:\n\t%s <binary name>\n", 47 argv[0]); 48 return (1); 49 } 50 51 errno = 0; 52 53 if ((fd = open(argv[1], O_RDONLY)) < 0) { 54 perror("open"); 55 return (errno); 56 } 57 if (fstat(fd, &statbuf) < 0) { 58 perror("fstat"); 59 return (errno); 60 } 61 62 if (mmap(0, statbuf.st_size, 63 PROT_EXEC, MAP_SHARED, fd, 0) == MAP_FAILED) { 64 perror("mmap"); 65 return (errno); 66 } 67 68 return (0); 69 } 70