getopt: Add pr_fmt ...

To give the debug output more context.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

getopt: Add support for '--' to stop option parsing ...

In some cases when commands have optional arguments it is necessary
to explicitly stop option parsing after the last nonpositonal option.
Add support for '--' to accomplish this as done in getopt(3) aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

getopt: change optstring to const char* ...

Change getopt optstring parameter type to const char *.
Also change type to const char * of tmp variable which
pointed to optstring. This will only handle readonly.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

getopt: save and restore context ...

execute_command is the single point where commands are executed and thus a new
getopt context is needed. currently we call getopt_reset here to reset the
context. This breaks though when a command tries to run a command itself by
calling execute_command or run_command.  In this case we have to store the
context and restore it afterwards. The same is necessary in builtin_getopt.
Currently noone does this so this one shouldn't fix a bug, but merely allows
us to do such things later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

getopt: turn commented out printf into debug() ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Export symbols printf and the ones needed for getopt

svn_rev_643 ...

structure cleanup