-O nobuf: disable IO buffering

[tfcrypt.git] / tfc_error.c

diff --git a/tfc_error.c b/tfc_error.c
index 4d64afde69f5c3be13151e53a4e12ed6e98aecb0..2b50807f6071cedbafd386cb3bfcbda51967e0e5 100644 (file)
--- a/tfc_error.c
+++ b/tfc_error.c
@@ -162,6 +162,7 @@ void usage(void)
                tfc_say("    when the whole status line width is smaller than tty width.");
                tfc_say("    statless: emit less information in status line (only processed data).");
                tfc_say("    iobs=val: set IO block size value. Must not exceed %u bytes.", TFC_U(TFC_BLKSIZE));
+               tfc_say("    nobuf: disable IO buffering, write as soon as data received (only for stream ciphers!)");
                tfc_say("    iseek=val: seek source file/device by these val bytes.");
                tfc_say("    oseek=val: seek destination file/device by these val bytes.");
                tfc_say("    ioseek=val: seek both source and destination.");
@@ -245,7 +246,7 @@ void usage(void)
        tfc_say("  -w: overwrite source file. If not file, ignored.");
        tfc_say("  -n TURNS: number of turns to perform in Skein function.");
        tfc_say("    Default is always defined when building tfcrypt.");
-       tfc_say("  -C mode: mode of operation: CTR, STREAM, XTS, ECB, CBC, OCB.");
+       tfc_say("  -C mode: mode of operation: CTR, STREAM, XTS, ECB, CBC.");
        tfc_say("    Default encryption mode can be changed when building tfcrypt.");
        tfc_say("  -c opt: initial CTR value initialisation mode:");
        tfc_say("    show: do default action, then dump CTR value to stderr,");
@@ -341,6 +342,7 @@ void usage(void)
        tfc_say("    shorthex: with -H, do not print printable characters, dump only hex string.");
        tfc_say("    logfile: (same as -o) redirect all messages to logfile instead of stderr.");
        tfc_say("    iobs=val: set IO block size value. Must not exceed %u bytes.", TFC_U(TFC_BLKSIZE));
+       tfc_say("    nobuf: disable IO buffering, write as soon as data received (only for stream ciphers!)");
        tfc_say("    xtsblocks=val: use these nr of TF blocks per XTS block. Default is %u.", TFC_U(TFC_XTSBLOCKS));
        tfc_say("    iseek=val: seek source file/device by these val bytes.");
        tfc_say("    Initial counter is adjusted automatically.");