-O ro: readonly files, never write anything (except to standard streams)

[tfcrypt.git] / tfc_error.c

diff --git a/tfc_error.c b/tfc_error.c
index 01cca1ac5c153247ae02b86cacbd31abec3cd7af..bb477c4883020ddbc3874d330dd418e48640b4d1 100644 (file)
--- a/tfc_error.c
+++ b/tfc_error.c
@@ -148,6 +148,7 @@ void usage(void)
                tfc_say("  -a: shortcut of -O xtime.");
                tfc_say("  -l length: read only these first bytes of source.");
                tfc_say("  -O opts: set options (comma separated list):");
+               tfc_say("    ro: open all files only for reading, even those intended for writing,");
                tfc_say("    sync: request a synchronous I/O for a output,");
                tfc_say("    fsync: on each write() call a corresponding fsync(fd),");
                tfc_say("    trunc: open(O_WRONLY) will truncate output file to zero size.");
@@ -315,6 +316,7 @@ void usage(void)
        tfc_say("    Multiple -E specifiers may be given in separate options.");
        tfc_say("  -o logfile: redirect all messages to logfile instead of stderr.");
        tfc_say("  -O opts: set options (comma separated list):");
+       tfc_say("    ro: open all files only for reading, even those intended for writing,");
        tfc_say("    sync: request a synchronous I/O for a output,");
        tfc_say("    fsync: on each write() call a corresponding fsync(fd),");
        tfc_say("    trunc: open(O_WRONLY) will truncate output file to zero size.");