print copyright and NO WARRANTY statement during startup

Also, check for missing file name argument

1 files changed, 23 insertions, 3 deletions

diff --git a/easytool/easytool.c b/easytool/easytool.c
index f8da4e0..a65ea22 100644
--- a/easytool/easytool.c
+++ b/easytool/easytool.c
@@ -41,6 +41,13 @@
 /* Easycard specific includes */
 #include "easycard.h"
 
+#define VERSION	"0.01"
+#define COPYRIGHT 						\
+	"EasyTool "VERSION"\n"					\
+	"(C) 2010 by Harald Welte <laforge@gnumonks.org>\n"	\
+	"This is FREE SOFTWARE with ABSOLUTELY NO VARRANTY\n\n"	\
+	"Use of this software is only authorized for RESEARCH PURPOSE!\n\n" 
+
 struct {
 	int fd;
 	unsigned long size;
@@ -175,24 +182,37 @@ static void dump_easycard(mifare_tag *mft)
 	}
 }
 
+static void print_help(void)
+{
+}
+
 int main(int argc, char **argv)
 {
 	struct stat st;
 
+	printf(COPYRIGHT);
+
+	if (argc < 2) {
+		fprintf(stderr, "ERROR: You must specify the file name of "
+			"a mifare dump file (.mfd)\n");
+		print_help();
+		exit(2);
+	}
+
 	global.fd = open(argv[1], O_RDONLY);
 	if (global.fd < 0) {
-		perror("open");
+		perror("Error opening the MFD file");
 		exit(1);
 	}
 	if (fstat(global.fd, &st) < 0) {
-		perror("stat");
+		perror("Error stat()ing the MFD file");
 		exit(1);
 	}
 	global.size = st.st_size;
 	global.mft = mmap(NULL, global.size, PROT_READ, MAP_SHARED,
 			  global.fd, 0);
 	if (!global.mft) {
-		perror("mmap");
+		perror("Error mmap()ing the MFD file");
 		exit(1);
 	}