X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=finddup.c;h=8d6e67af255088462aa88a7a9a548d8e9eba768d;hb=da07c4f78dce0021ed889ea0db818cb55d96ceed;hp=39a3df6c22b733d34ed88a5041fbf9ac3b170c93;hpb=87eea2c3b5958b578cdf32f5e01d3c733bdf7615;p=finddup.git

diff --git a/finddup.c b/finddup.c
index 39a3df6..8d6e67a 100644
--- a/finddup.c
+++ b/finddup.c
@@ -1,7 +1,8 @@
 
 /*
- *  finddup is a simple utility to display the files and directories
- *  according to their total disk occupancy.
+ *  finddup is a simple utility find duplicated files, files common to
+ *  several directories, or files present in one directory and not in
+ *  another one.
  *
  *  Copyright (c) 2010 Francois Fleuret
  *  Written by Francois Fleuret <francois@fleuret.org>
@@ -22,6 +23,8 @@
  *
  */
 
+#define VERSION_NUMBER "0.5"
+
 #define _BSD_SOURCE
 
 #include <sys/types.h>
@@ -219,9 +222,9 @@ void start(const char *dirname1, const char *dirname2) {
   struct file_with_size *node1, *node2;
   int not_in, found;
 
-  if(dirname2[0] == '^') {
+  if(strncmp(dirname2, "not:", 4) == 0) {
     not_in = 1;
-    dirname2++;
+    dirname2 += 4;
   } else {
     not_in = 0;
   }
@@ -269,6 +272,17 @@ void start(const char *dirname1, const char *dirname2) {
   file_list_delete(list2);
 }
 
+void print_help(FILE *out) {
+  fprintf(out, "Usage: finddup [OPTION]... DIR1 [[not:]DIR2]\n");
+  fprintf(out, "Version %s (%s)\n", VERSION_NUMBER, UNAME);
+  fprintf(out, "Without DIR2, lists duplicated files found in DIR1. With DIR2, lists files common to both directories. With the not: prefix, lists 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 +301,7 @@ 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 +320,7 @@ 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);
   }