fix for a trap on SIGINT restoring the default disposition in an asynchronous subshell; change cd exit status if -Pe supplied and the directory can't be changed; fix for compound associative array assignment if one of the expanded words unsets the array during word expansion; fixes for rare systems that don't have various defines and system calls

shell.c

@@ -1654,7 +1654,7 @@ open_shell_script (char *script_name)
 #endif
 
   /* Only do this with non-tty file descriptors we can seek on. */
-  if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1))
+  if (fd_is_tty == 0 && (lseek (fd, 0L, SEEK_CUR) != -1))
     {
       /* Check to see if the `file' in `bash file' is a binary file
 	 according to the same tests done by execute_simple_command (),
@@ -1691,7 +1691,7 @@ open_shell_script (char *script_name)
 	  exit (EX_BINARY_FILE);
 	}
       /* Now rewind the file back to the beginning. */
-      lseek (fd, 0L, 0);
+      lseek (fd, 0L, SEEK_SET);
     }
 
   /* Open the script.  But try to move the file descriptor to a randomly