Rewrote the help.

diff --git a/finddup.c b/finddup.c
index 39a3df6..9a6e6be 100644 (file)
--- a/finddup.c
+++ b/finddup.c
@@ -22,6 +22,8 @@
  *
  */
 
+#define VERSION_NUMBER "0.5"
+
 #define _BSD_SOURCE
 
 #include <sys/types.h>
@@ -269,6 +271,17 @@ void start(const char *dirname1, const char *dirname2) {
   file_list_delete(list2);
 }
 
+void print_help(FILE *out) {
+  fprintf(out, "Usage: finddup [OPTION]... DIR1 [[^]DIR2]\n");
+  fprintf(out, "Version %s (%s)\n", VERSION_NUMBER, UNAME);
+  fprintf(out, "Without DIR2, lists duplicated files in DIR1. With DIR2, list files common to both directories. With DIR2 starting with a ^, list files found in DIR1 which do not exist in DIR2.\n");
+  fprintf(out, "\n");
+  fprintf(out, "   -h   show this help.\n");
+  fprintf(out, "   -r   show the real file paths.\n");
+  fprintf(out, "\n");
+  fprintf(out, "Report bugs and comments to <francois@fleuret.org>\n");
+}
+
 /**********************************************************************/
 
 int main(int argc, char **argv) {
@@ -287,8 +300,7 @@ int main(int argc, char **argv) {
     switch (c) {
 
     case 'h':
-      printf("Usage: finddup [OPTION]... [FILE]...\n");
-      printf("Report bugs and comments to <francois@fleuret.org>\n");
+      print_help(stdout);
       exit(EXIT_SUCCESS);
 
       break;
@@ -307,7 +319,7 @@ int main(int argc, char **argv) {
   } else if(optind < argc) {
     start(argv[optind], argv[optind]);
   } else {
-    fprintf(stderr, "%s [OPTIONS] <dir1> [[^]<dir2>]\n", argv[0]);
+    print_help(stderr);
     exit(EXIT_FAILURE);
   }