tfc_say("convert encrypted data into ASCII format to ease transmission.");
tfc_say("\n");
tfc_say(" -e, -d: encrypt, decrypt (it maybe required).");
+ tfc_say(" -s <file>: load tfcrypt salt from file.");
+ tfc_say(" -s disable: disable key salting at all.");
tfc_say(" -p: instead of using key, ask for password.");
tfc_say(" -k: use raw (%u byte) key instead of deriving it from arbitrary data.", TFC_U(TF_KEY_SIZE));
tfc_say(" -z: ask for key in plain C string form through password asker.");
tfc_say(" cont: print error if not quiet, then continue,");
tfc_say(" no action to pad missing data is attempted.");
tfc_say(" may be dangerous when working with block devices.");
- tfc_say(" sync: print error if not quiet, then continue.");
+ tfc_say(" sync: print error if not quiet, then continue,");
tfc_say(" pad missing data block with zeroes.");
- tfc_say(" note that sync works only with read errors!");
+ tfc_say(" lsync: same as sync, but does not use SEEK_SET logic,");
+ tfc_say(" lsync uses only relative seek operations, and does not prequery");
+ tfc_say(" the current file position for exact offsets, which maybe unsafe.");
+ tfc_say(" For this reason, it is HIGHLY recommended to use sync instead!");
+ tfc_say(" Note that both sync and lsync work only with read errors!");
tfc_say(" default error action is exit with printing status if not quiet.");
tfc_say(" -E xall: turn on error actions above for all errors, not just EIO errors.");
tfc_say(" This must be a separate option given before usual -E how option.");