$NetBSD: patch-ab,v 1.1 2002/05/09 22:16:53 agc Exp $

--- main/generator.c	2002/05/09 21:34:29	1.1
+++ main/generator.c	2002/05/09 21:34:34
@@ -3,9 +3,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <sys/stat.h>
 #include <unistd.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <fcntl.h>
 #include <ctype.h>
 #include <signal.h>
@@ -147,7 +147,7 @@
 char *gen_loadimage(const char *filename)
 {
   int file, imagetype, bytes, bytesleft;
-  struct stat statbuf;
+  off_t	filesize;
   const char *extension;
   uint8 *buffer;
   unsigned int blocks, x, i;
@@ -162,20 +162,6 @@
   }
 
   /* Load file */
-  if (stat(filename, &statbuf) != 0)
-    return ("Unable to stat file.");
-  cpu68k_romlen = statbuf.st_size;
-  if (cpu68k_romlen < 0x200)
-    return ("File is too small");
-
-  /* allocate enough memory plus 16 bytes for disassembler to cope
-     with the last instruction */
-  if ((cpu68k_rom = malloc(cpu68k_romlen + 16)) == NULL) {
-    cpu68k_romlen = 0;
-    return ("Out of memory!");
-  }
-  gen_freerom = 1;
-  memset(cpu68k_rom, 0, cpu68k_romlen + 16);
 #ifdef ALLEGRO
   if ((file = open(filename, O_RDONLY | O_BINARY, 0)) == -1) {
 #else
@@ -186,6 +172,28 @@
     cpu68k_romlen = 0;
     return ("Unable to open file.");
   }
+  if ( (filesize = lseek(file, 0, SEEK_END)) == -1 || // get size
+	lseek(file, 0, SEEK_SET) == -1) // then seek to start
+  {
+	perror ("lseek failed");
+	close (file);
+	return ("Error accessing file");
+  }
+	 
+	cpu68k_romlen = filesize;
+  if (cpu68k_romlen < 0x200) {
+    (void) close(file);
+    return ("File is too small");
+  }
+
+  /* allocate enough memory plus 16 bytes for disassembler to cope
+     with the last instruction */
+  if ((cpu68k_rom = malloc(cpu68k_romlen + 16)) == NULL) {
+    cpu68k_romlen = 0;
+    return ("Out of memory!");
+  }
+  gen_freerom = 1;
+  memset(cpu68k_rom, 0, cpu68k_romlen + 16);
   buffer = cpu68k_rom;
   bytesleft = cpu68k_romlen;
   do {