[PATCH] Support for --min-size in du

[Jakob Truelsen]

I often find myself using sed to filter out only large entries in the
output of du, this patch adds a --min-size option to du to do this in
a more pratical way.

commit 3ce873cddcd608a654750ffa67d070c1ce82b036
Author: Jakob Truelsen <address@hidden>
Date:   Tue Oct 11 15:28:26 2011 +0200

    Add min-size option to du to only show information about large entities

diff --git a/src/du.c b/src/du.c
index fba7f7d..94d317e 100644
--- a/src/du.c
+++ b/src/du.c
@@ -141,6 +141,9 @@ static bool opt_separate_dirs = false;
    is at level 0, so `du --max-depth=0' is equivalent to `du -s'.  */
 static size_t max_depth = SIZE_MAX;

+/* Only output entries with atleast this size */
+static size_t min_size = 0;
+
 /* Human-readable options for output.  */
 static int human_output_opts;

@@ -187,7 +190,8 @@ enum
   HUMAN_SI_OPTION,
   FTS_DEBUG,
   TIME_OPTION,
-  TIME_STYLE_OPTION
+  TIME_STYLE_OPTION,
+  MIN_SIZE_OPTION
 };

 static struct option const long_options[] =
@@ -206,6 +210,7 @@ static struct option const long_options[] =
   {"human-readable", no_argument, NULL, 'h'},
   {"si", no_argument, NULL, HUMAN_SI_OPTION},
   {"max-depth", required_argument, NULL, 'd'},
+  {"min-size", required_argument, NULL, MIN_SIZE_OPTION},
   {"null", no_argument, NULL, '0'},
   {"no-dereference", no_argument, NULL, 'P'},
   {"one-file-system", no_argument, NULL, 'x'},
@@ -314,6 +319,7 @@ Mandatory arguments to long options are mandatory
for short options too.\n\
                           only if it is N or fewer levels below the command\n\
                           line argument;  --max-depth=0 is the same as\n\
                           --summarize\n\
+      --min-size=SIZE   only output entries with size at least SIZE\n\
 "), stdout);
       fputs (_("\
       --time            show time of the last modification of any
file in the\n\
@@ -554,8 +560,9 @@ process_file (FTS *fts, FTSENT *ent)
      do let its size contribute to the total. */
   duinfo_add (&tot_dui, &dui);

-  if ((IS_DIR_TYPE (info) && level <= max_depth)
-      || ((opt_all && level <= max_depth) || level == 0))
+  if (dui_to_print.size >= min_size &&
+      ((IS_DIR_TYPE (info) && level <= max_depth)
+       || ((opt_all && level <= max_depth) || level == 0)))
     print_size (&dui_to_print, file);

   return ok;
@@ -787,6 +794,15 @@ main (int argc, char **argv)
           time_style = optarg;
           break;

+        case MIN_SIZE_OPTION:
+          {
+           char *ptr;  
+            enum strtol_error e = xstrtoumax (optarg, &ptr, 0,
&min_size, "eEgGkKmMpPtTyYzZ0");
+            if (e != LONGINT_OK)
+              xstrtol_fatal (e, oi, c, long_options, optarg);
+          }
+          break;
+
         case_GETOPT_HELP_CHAR;

         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);