More documentation updates, and minor fixes to make things sync

up with the docs.
 -Erik


git-svn-id: svn://busybox.net/trunk/busybox@457 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 15 insertions, 4 deletions

diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c
index 5948bacc8..c8206e020 100644
--- a/miscutils/makedevs.c
+++ b/miscutils/makedevs.c
@@ -17,10 +17,18 @@
 #include <sys/stat.h>
 
 static const char makedevs_usage[] =
-        "makedevs 0.01 -- Create an entire range of device files\n\n"
-        "\tmakedevs /dev/ttyS c 4 64 0 63        (ttyS0-ttyS63)\n"
-
-        "\tmakedevs /dev/hda b 3 0 0 8 s         (hda,hda1-hda8)\n";
+        "makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]\n\n"
+        "Creates a range of block or character special files\n\n"
+        "TYPEs include:\n"
+        "\tb:\tMake a block (buffered) device.\n"
+        "\tc or u:\tMake a character (un-buffered) device.\n"
+        "\tp:\tMake a named pipe. MAJOR and MINOR are ignored for named pipes.\n\n"
+        "FIRST specifies the number appended to NAME to create the first device.\n"
+        "LAST specifies the number of the last item that should be created.\n"
+        "If 's' is the last argument, the base device is created as well.\n\n"
+        "For example:\n"
+        "\tmakedevs /dev/ttyS c 4 66 2 63   ->  ttyS2-ttyS63\n"
+        "\tmakedevs /dev/hda b 3 0 0 8 s    ->  hda,hda1-hda8\n";
 
 int makedevs_main(int argc, char **argv)
 {
@@ -38,6 +46,9 @@ int makedevs_main(int argc, char **argv)
         char devname[255];
         char buf[255];
 
+        if (argc < 7 || *argv[1]=='-')
+                usage(makedevs_usage);
+
         switch (type[0]) {
         case 'c':
                 mode = S_IFCHR;