1 files changed, 39 insertions, 3 deletions

diff --git a/usage.c b/usage.c
index 864891797..9ae2bb3ef 100644
--- a/usage.c
+++ b/usage.c
@@ -190,9 +190,22 @@ const char deallocvt_usage[] =
 
 #if defined BB_DF
 const char df_usage[] =
-        "df [filesystem ...]"
+        "df [-?"
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "hm"
+#endif
+        "k] [filesystem ...]\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
         "\n\nPrint the filesystem space used and space available."
+        "Options:\n"
+        "\t-?\tshow usage information\n"
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "\t-h\tprint sizes in human readable format (e.g., 1K 243M 2G )\n"
+        "\t-m\tprint sizes in megabytes\n"
+        "\t-k\tprint sizes in kilobytes(default)\n"
+#else
+        "\t-k\tprint sizes in kilobytes(compatability)\n"
+#endif
 #endif
         ;
 #endif
@@ -244,13 +257,25 @@ const char dpkg_deb_usage[] =
 
 #if defined BB_DU
 const char du_usage[] =
-        "du [OPTION]... [FILE]..."
+        "du [-?ls"
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "hm"
+#endif
+        "k] [FILE]...\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
         "\n\nSummarizes disk space used for each FILE and/or directory.\n"
         "Disk space is printed in units of 1024 bytes.\n\n"
         "Options:\n"
+        "\t-?\tshow usage information\n"
         "\t-l\tcount sizes many times if hard linked\n"
         "\t-s\tdisplay only a total for each argument"
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "\t-h\tprint sizes in human readable format (e.g., 1K 243M 2G )\n"
+        "\t-m\tprint sizes in megabytes\n"
+        "\t-k\tprint sizes in kilobytes(default)\n"
+#else
+        "\t-k\tprint sizes in kilobytes(compatability)\n"
+#endif
 #endif
         ;
 #endif
@@ -661,7 +686,10 @@ const char ls_usage[] =
 #ifdef BB_FEATURE_LS_SORTFILES
         "X"
 #endif
-        "] [filenames...]"
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "h"
+#endif
+        "k] [filenames...]\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
         "\n\nList directory contents\n\n"
         "Options:\n"
@@ -716,6 +744,14 @@ const char ls_usage[] =
 #ifdef BB_FEATURE_LS_SORTFILES
         "\t-X\tsort the listing by extension\n"
 #endif
+
+#ifdef BB_FEATURE_HUMAN_READABLE
+        "\t-h\tprint sizes in human readable format (e.g., 1K 243M 2G )\n"
+        "\t-k\tprint sizes in kilobytes(default)\n"
+#else
+        "\t-k\tprint sizes in kilobytes(compatability)"
+#endif
+
 #endif /*  BB_FEATURE_TRIVIAL_HELP */
         ;
 #endif /* BB_LS */