1 files changed, 24 insertions, 2 deletions

diff --git a/include/usage.h b/include/usage.h
index e595bd9d9..12c45b45f 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1841,6 +1841,26 @@
         "busybox: OK\n" \
         "^D\n"
 
+#define mdev_trivial_usage \
+        "[-s]"
+#define mdev_full_usage \
+        "\ts\tScan /sys and populate /dev during system boot\n\n" \
+        "Called with no options (via hotplug) it uses environment variables\n" \
+        "to determine which device to add/remove."
+#ifdef CONFIG_FEATURE_MDEV_CONFIG
+#define mdev_notes_usage \
+        "The mdev config file contains lines that look like:\n" \
+        "  hd[a-z][0-9]* 0:3 660\n\n" \
+        "That's device name (with regex match), uid:gid, and permissions.\n\n" \
+        "Optionally, that can be followed (on the same line) by an asterisk\n" \
+        "and a command line to run after creating the corresponding device(s),\n"\
+        "ala:\n\n" \
+        "  hdc root:cdrom 660  *ln -s hdc cdrom\n\n" \
+        "Config file parsing stops on the first matching line.  If no config\n"\
+        "entry is matched, devices are created with default 0:0 660.  (Make\n"\
+        "the last line match .* to override this.)\n\n"
+#endif
+
 #define mesg_trivial_usage \
         "[y|n]"
 #define mesg_full_usage \
@@ -2822,10 +2842,12 @@
         "\t-a\tStart swapping on all swap devices"
 
 #define switch_root_trivial_usage \
-        "NEW_ROOT NEW_INIT [ARGUMENTS_TO_INIT]"
+        "[-c /dev/console] NEW_ROOT NEW_INIT [ARGUMENTS_TO_INIT]"
 #define switch_root_full_usage \
         "Use from PID 1 under initramfs to free initramfs, chroot to NEW_ROOT,\n" \
-        "and exec NEW_INIT.\n"
+        "and exec NEW_INIT.\n\n" \
+        "Options:\n" \
+        "\t-c\tRedirect console to device on new root"
 
 #define sync_trivial_usage \
         ""