From e96b00b6716ceb5046d2e3592834cd167b05ab61 Mon Sep 17 00:00:00 2001
From: Francois Fleuret <francois@fleuret.org>
Date: Fri, 26 Feb 2010 23:10:15 +0100
Subject: [PATCH] Added an option to show the top of the list instead of the
 bottom.

---
 dus.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/dus.c b/dus.c
index 24dcc28..88221f6 100644
--- a/dus.c
+++ b/dus.c
@@ -53,6 +53,9 @@ int fancy_size_display = 0; /* 1 means to use floating values with K, M and G
 
 int reverse_sorting = 0; /* 1 means to show the large ones first */
 
+int show_top = 0; /* 1 means to show the top of the sorted list
+                     instead of the bottom */
+
 /********************************************************************/
 
 int ignore_entry(const char *name) {
@@ -171,7 +174,7 @@ int compare_files(const void *x1, const void *x2) {
 void print_sorted(struct file_with_size *root, int height) {
   struct file_with_size *node;
   struct file_with_size **nodes;
-  int nb, n, first;
+  int nb, n, first, last;
 
   nb = 0;
   for(node = root; node; node = node->next) {
@@ -188,6 +191,7 @@ void print_sorted(struct file_with_size *root, int height) {
   qsort(nodes, nb, sizeof(struct file_with_size *), compare_files);
 
   first = 0;
+  last = nb;
 
   if(forced_height) {
     height = forced_height;
@@ -197,8 +201,14 @@ void print_sorted(struct file_with_size *root, int height) {
     first = nb - height;
   }
 
+  if(show_top) {
+    n = last;
+    last = nb - first;
+    first = nb - n;
+  }
+
   if(fancy_size_display) {
-    for(n = first; n < nb; n++) {
+    for(n = first; n < last; n++) {
       if(nodes[n]->size < 1024) {
         printf("% 7d %s\n",
                ((int) nodes[n]->size),
@@ -218,7 +228,7 @@ void print_sorted(struct file_with_size *root, int height) {
       }
     }
   } else {
-    for(n = first; n < nb; n++) {
+    for(n = first; n < last; n++) {
       print_size_sum(nodes[n]->size);
       printf(" %s\n", nodes[n]->filename);
     }
@@ -238,7 +248,7 @@ int main(int argc, char **argv) {
   setlocale (LC_ALL, "");
 
   while (1) {
-    c = getopt(argc, argv, "dfrl:hdu");
+    c = getopt(argc, argv, "dfrtl:hdu");
     if (c == -1)
       break;
 
@@ -256,6 +266,10 @@ int main(int argc, char **argv) {
       reverse_sorting = 1;
       break;
 
+    case 't':
+      show_top = 1;
+      break;
+
     case 'l':
       forced_height = atoi(optarg);
       break;
@@ -267,6 +281,7 @@ int main(int argc, char **argv) {
       printf("   -d         ignore files and directories starting with a '.'\n");
       printf("   -f         display size with float values and K, M and G units.\n");
       printf("   -r         reverse the sorting order.\n");
+      printf("   -t         show the top of the list.\n");
       printf("   -l <lines> specificy the number of lines to display. The value -1\n");
       printf("              corresponds to all the lines. By default the command\n");
       printf("              shows one line less than the height the tty, or all the\n");
-- 
2.20.1