Lots of code use this construct:

	cmd_usage(cmdtp);
	return 1;

Change cmd_usage() let it return 1 - then we can replace all these
ocurrances by

	return cmd_usage(cmdtp);

This fixes a few places with incorrect return code handling, too.

Signed-off-by: Wolfgang Denk <wd@denx.de>

The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>

Prototype for gunzip/zunzip was only in lib_generic/gunzip.c and thus
repeated in every file using it. This patch moves the prototypes to
common.h and removes all prototypes distributed anywhere else.

Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>

The basic memtest function tries to watch for ^C after each
pattern pass as an escape mechanism, but if things are horribly
wrong, we'll be stuck in an inner loop flooding the console with
error messages and never check for ^C.  To make matters worse,
if the user waits for all the error messages to complete, we
then incorrectly report the test passed without errors.

Adding a check for ^C after any error is printed will give
the end user an escape mechanism from a console flood without
slowing down the overall test speed on a slow processor.

Also, the more extensive memtest quit after just a single error,
which is inconsistent with the normal memtest, and not useful if
if you are doing dynamic environmental impact testing, such as
heating/cooling etc.

Both tests now track the error count and report it properly
at test completion.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

Now that we have sha1 and md5 in lib_generic, allow people to use
them on the command line, for checking downloaded files.

Signed-off-by: Robin Getz <rgetz@analog.com>

Many of the help messages were not really helpful; for example, many
commands that take no arguments would not print a correct synopsis
line, but "No additional help available." which is not exactly wrong,
but not helpful either.

Commit ``Make "usage" messages more helpful.'' changed this
partially. But it also became clear that lots of "Usage" and "Help"
messages (fields "usage" and "help" in struct cmd_tbl_s respective)
were actually redundant.

This patch cleans this up - for example:

Before:
	=> help dtt
	dtt - Digital Thermometer and Thermostat

	Usage:
	dtt         - Read temperature from digital thermometer and thermostat.

After:
	=> help dtt
	dtt - Read temperature from Digital Thermometer and Thermostat

	Usage:
	dtt

Signed-off-by: Wolfgang Denk <wd@denx.de>

MMC cards are not memory, so we stop treating them that way.

Signed-off-by: Andy Fleming <afleming@freescale.com>

Remove command name from all command "usage" fields and update
common/command.c to display "name - usage" instead of
just "usage". Also remove newlines from command usage fields.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

The iteration limit is passed to mtest as a fourth parameter:
[start [end [pattern [iterations]]]]
If no fourth parameter is supplied, there is no iteration limit and the
test will loop forever.

Signed-off-by: Dirk Eibach <eibach@gdsys.de>