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      1 /* $NetBSD: exec_coff.c,v 1.7 2009/08/20 17:39:51 he Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1997 Christopher G. Demetriou
      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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *          This product includes software developed for the
     18  *          NetBSD Project.  See http://www.NetBSD.org/ for
     19  *          information about NetBSD.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  *
     34  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 __RCSID("$NetBSD: exec_coff.c,v 1.7 2009/08/20 17:39:51 he Exp $");
     40 #endif
     41 
     42 #include <stdio.h>
     43 #include <stdlib.h>
     44 #include <string.h>
     45 #include <unistd.h>
     46 #include <errno.h>
     47 #include <limits.h>
     48 #include <sys/types.h>
     49 #include <sys/stat.h>
     50 
     51 #include "extern.h"
     52 
     53 #if defined(NLIST_COFF)
     54 
     55 #include <sys/exec_coff.h>
     56 
     57 int
     58 check_coff(int fd, const char *filename)
     59 {
     60 	struct coff_filehdr fh;
     61 	struct stat sb;
     62 
     63 	/*
     64 	 * Check the header to make sure it's an COFF file (of the
     65 	 * appropriate size).
     66 	 */
     67 	if (fstat(fd, &sb) == -1)
     68 		return 0;
     69 	if (sb.st_size > SIZE_T_MAX)
     70 		return 0;
     71 	if (read(fd, &fh, sizeof fh) != sizeof fh)
     72 		return 0;
     73 
     74 	if (COFF_BADMAG(&fh))
     75 		return 0;
     76 
     77 	return 1;
     78 }
     79 
     80 int
     81 hide_coff(int fd, const char *filename)
     82 {
     83 
     84 	fprintf(stderr, "%s: COFF executables not currently supported\n",
     85 		filename);
     86 	return 1;
     87 }
     88 
     89 #endif /* defined(NLIST_COFF) */
     90