* objdump.c (print_line): Check fwrite return value.

* srconv.c (checksum, wr_tr, wr_cs): Likewise.
	* sysdump.c (fillup): Return zero on getc or fread EOF.  Return count
	read.

binutils/ChangeLog

@@ -1,3 +1,10 @@
+2007-10-15  Alan Modra  <amodra@bigpond.net.au>
+
+	* objdump.c (print_line): Check fwrite return value.
+	* srconv.c (checksum, wr_tr, wr_cs): Likewise.
+	* sysdump.c (fillup): Return zero on getc or fread EOF.  Return count
+	read.
+
 2007-10-10  Jim Blandy  <jimb@codesourcery.com>
 
 	* dwarf.c (process_debug_info): Line up section offsets of

binutils/objdump.c

@@ -1130,12 +1130,15 @@ static void
 print_line (struct print_file_list *p, unsigned int line)
 {
   const char *l;
+  size_t len;
  
   --line; 
   if (line >= p->maxline)
     return;
   l = p->linemap [line];
-  fwrite (l, 1, strcspn (l, "\n\r"), stdout);
+  /* Test fwrite return value to quiet glibc warning.  */
+  len = strcspn (l, "\n\r");
+  if (len == 0 || fwrite (l, len, 1, stdout) == 1)
     putchar ('\n');
 }
 

binutils/srconv.c

@@ -176,7 +176,9 @@ checksum (FILE *file, unsigned char *ptr, int size, int code)
 
   /* Glue on a checksum too.  */
   ptr[bytes] = ~sum;
-  fwrite (ptr, bytes + 1, 1, file);
+  if (fwrite (ptr, bytes + 1, 1, file) != 1)
+    /* FIXME: Return error status.  */
+    abort ();
 }
 
 
@@ -299,7 +301,10 @@ wr_tr (void)
       0x03,			/* RL */
       0xfd,			/* CS */
     };
-  fwrite (b, 1, sizeof (b), file);
+
+  if (fwrite (b, sizeof (b), 1, file) != 1)
+    /* FIXME: Return error status.  */
+    abort ();
 }
 
 static void
@@ -1452,7 +1457,10 @@ wr_cs (void)
     0x00,			/* dot */
     0xDE			/* CS */
   };
-  fwrite (b, 1, sizeof (b), file);
+
+  if (fwrite (b, sizeof (b), 1, file) != 1)
+    /* FIXME: Return error status.  */
+    abort ();
 }
 
 /* Write out the SC records for a unit.  Create an SC

binutils/sysdump.c

@@ -119,8 +119,15 @@ fillup (unsigned char *ptr)
   int sum;
   int i;
 
-  size = getc (file) - 2;
-  fread (ptr, 1, size, file);
+  size = getc (file);
+  if (size == EOF
+      || size <= 2)
+    return 0;
+
+  size -= 2;
+  if (fread (ptr, size, 1, file) != 1)
+    return 0;
+
   sum = code + size + 2;
 
   for (i = 0; i < size; i++)
@@ -132,7 +139,7 @@ fillup (unsigned char *ptr)
   if (dump)
     dh (ptr, size);
 
-  return size - 1;
+  return size;
 }
 
 static barray