BP_FILE_LEN
char bp_file[BP_FILE_LEN]; /* boot file name */
#if BP_FILE_LEN > MNAMELEN
#define BOOTFILELEN BP_FILE_LEN
for (t = homedir; t - homedir < BP_FILE_LEN; t++)
if (t - homedir < BP_FILE_LEN) {
homedir[BP_FILE_LEN - 1] = '\0';
char bp_file[BP_FILE_LEN]; /* boot file name */