X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=show-index.c;h=63f9da53237d4233bede66a28e4bcf27d5b44af1;hb=ad7ace714d353ef49045bc37c1363e8fc904792d;hp=45bb535773fd9c36f73502df9462f7de800009c8;hpb=372c767610c4e4d7f4832d037ac51a62a59875a3;p=git.git

diff --git a/show-index.c b/show-index.c
index 45bb53577..63f9da532 100644
--- a/show-index.c
+++ b/show-index.c
@@ -1,6 +1,9 @@
 #include "cache.h"
 #include "pack.h"
 
+static const char show_index_usage[] =
+"git show-index < <packed archive index>";
+
 int main(int argc, char **argv)
 {
 	int i;
@@ -8,6 +11,8 @@ int main(int argc, char **argv)
 	unsigned int version;
 	static unsigned int top_index[256];
 
+	if (argc != 1)
+		usage(show_index_usage);
 	if (fread(top_index, 2 * 4, 1, stdin) != 1)
 		die("unable to read header");
 	if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {