From ef46c7bb82a86d51cde68de08f0088e7281fc110 Mon Sep 17 00:00:00 2001
From: Todd Lewis <utoddl@email.unc.edu>
Date: Mar 27 2017 22:34:32 +0000
Subject: option -d to include dot files with 6 character names


---

diff --git a/hardlink.1 b/hardlink.1
index 04228f4..eca4a1c 100644
--- a/hardlink.1
+++ b/hardlink.1
@@ -3,7 +3,7 @@
 hardlink \- Consolidate duplicate files via hardlinks
 .SH "SYNOPSIS"
 .PP
-\fBhardlink\fP [\fB-c\fP] [\fB-n\fP] [\fB-v\fP] [\fB-vv\fP] [\fB-h\fP] directory1 [ directory2 ... ]
+\fBhardlink\fP [\fB-c\fP] [\fB-n\fP] [\fB-d\fP] [\fB-v\fP] [\fB-vv\fP] [\fB-h\fP] directory1 [ directory2 ... ]
 .SH "DESCRIPTION"
 .PP
 This manual page documents \fBhardlink\fP, a
@@ -28,6 +28,9 @@ Disregards permission, ownership and other differences.
 Force hardlinking across file systems.
 .IP "\fB-n\fP" 10
 Do not perform the consolidation; only print what would be changed.
+.IP "\fB-d\fP" 10
+Do not skip dot files with six character extensions. The normal behavior
+is to skip such files.
 .IP "\fB-v\fP" 10
 Print summary after hardlinking.
 .IP "\fB-vv\fP" 10
diff --git a/hardlink.c b/hardlink.c
index 16d8163..c77029e 100644
--- a/hardlink.c
+++ b/hardlink.c
@@ -58,6 +58,7 @@ int no_link = 0;
 int verbose = 0;
 int content_only = 0;
 int force = 0;
+int dotfiles = 1;
 
 typedef struct _f {
   struct _f *next;
@@ -99,12 +100,13 @@ void doexit(int i)
 
 void usage(char *prog)
 {
-  fprintf (stderr, "Usage: %s [-cnvhf] directories...\n", prog);
+  fprintf (stderr, "Usage: %s [-cnvhdf] directories...\n", prog);
   fprintf (stderr, "  -c    When finding candidates for linking, compare only file contents.\n");
   fprintf (stderr, "  -n    Don't actually link anything, just report what would be done.\n");
   fprintf (stderr, "  -v    Print summary after hardlinking.\n");
   fprintf (stderr, "  -vv   Print every hardlinked file and bytes saved + summary.\n");
   fprintf (stderr, "  -f    Force hardlinking across filesystems.\n");
+  fprintf (stderr, "  -d    Don't skip dot files with 6 char extensions.\n");
   fprintf (stderr, "  -h    Show help.\n");
   exit(255);
 }
@@ -329,7 +331,7 @@ int main(int argc, char **argv)
   int ch;
   int i;
   dynstr nam1 = {NULL, 0};
-  while ((ch = getopt (argc, argv, "cnvhf")) != -1) {
+  while ((ch = getopt (argc, argv, "cnvhfd")) != -1) {
     switch (ch) {
     case 'n':
       no_link++;
@@ -343,6 +345,9 @@ int main(int argc, char **argv)
     case 'f':
       force=1;
       break;
+    case 'd':
+      dotfiles=0;
+      break;
     case 'h':
     default:
       usage(argv[0]);
@@ -375,7 +380,7 @@ int main(int argc, char **argv)
         if (!di->d_name[1] || !strcmp (di->d_name, "..") || !strncmp (di->d_name, ".in.", 4))
           continue;
         q = strrchr (di->d_name, '.');
-        if (q && strlen (q) == 7 && q != di->d_name) {
+        if (dotfiles && q && strlen (q) == 7 && q != di->d_name) {
           nam1.buf[nam1baselen] = 0;
           if (verbose)
             fprintf(stderr, "Skipping %s%s\n", nam1.buf, di->d_name);