disallow multiple input FLAC files when --import-tags-from=- is used (SF#1082577...

diff --git a/src/metaflac/usage.c b/src/metaflac/usage.c
index 366fb8d..d4a8e1b 100644 (file)
--- a/src/metaflac/usage.c
+++ b/src/metaflac/usage.c
@@ -138,7 +138,8 @@ int long_usage(const char *message, ...)
        fprintf(out, "                      should be of the form NAME=VALUE.  Multi-line comments\n");
        fprintf(out, "                      are currently not supported.  Specify --remove-all-tags\n");
        fprintf(out, "                      and/or --no-utf8-convert before --import-tags-from if\n");
-       fprintf(out, "                      necessary.\n");
+       fprintf(out, "                      necessary.  If FILE is '-' (stdin), only one FLAC file\n");
+       fprintf(out, "                      may be specified.\n");
        fprintf(out, "--export-tags-to=FILE Export tags to a file.  Use '-' for stdin.  Each line\n");
        fprintf(out, "                      will be of the form NAME=VALUE.  Specify\n");
        fprintf(out, "                      --no-utf8-convert if necessary.\n");