env: Add more context to error message ...

When setenv complains that it can't set a device parameter, then print
which parameter it tried to set.

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

device parameters: Allow dots in device names for setenv aswell ...

Since

f5d77d80f5 Allow device parameters for devices with dots in name

Devices can have dots in their name and we can still read its
device parameters. Do the same change for writing parameters so
they can be written aswell.

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

Allow device parameters for devices with dots in name ...

Devices can have a dot in the name, so we can't expect to find the
full device name before the first dot. Currently parameters of devices
with a dot in the name are inaccessible from the shell.
Fix this by iterating over the possible device name / parameter name
combinations to find a existing combination.

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

Merge branch 'for-next/include-cleanup'

getenv_bool: use strtobool ...

We now have a library function to convert a string to a boolean type.
Use it.

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

string: Fix (v)asprintf prototypes ...

Our asprintf and vasprintf have different prototypes than the glibc
functions. This causes trouble when we want to share barebox code
with userspace code. Change the prototypes for (v)asprintf to match
the glibc prototypes. Since the current (v)asprintf are convenient
to use change the existing functions to b(v)asprintf.

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

setenv: Be more informative when device parameter setting fails ...

When setting a device parameter fails not only the error code
is of interest, but also what the parameter name is, what the
device name is and whether a device was found for this name.
Add this information to the error message.

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

Fix bug in export 64 bit unsigned environment variable. ...

This patch corrects exporting unsigned 64-bit environment variables.
I had left out a signed off line before.

Signed-off-by: Michael Burkey <mdburkey at gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

environment variables: introduce new helpers ...

This introduces some new environment variable helpers and updates
the existing ones. Newly introduced are:

getenv_bool: read a bool variable
getenv_ul: read an unsigned long variable
getenev_uint: read an unsigned int variable
getenv_nonempty: like normal getenv, but does return NULL instead of an
                 empty string

All new helpers take a pointer to the value. This value is only modified
when the variable exists. This allows the following programming scheme:

	unsigned int myvalue = sanedefault;

	getenv_uint("myvalue", &myvalue);

So without checking the return value myvalue contains the best possible
value.

getenv_ull is updated to this scheme.

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

environment variables: use linux list ...

This switches environment variables to use linux list. This is easier
to read. An additional plus is that the environment variables no longer
need an initcall, so malloc is the only requirement for them.

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>

Make errno a positive value ...

Normally errno contains a positive error value. A certain unnamed developer
mixed this up while implementing U-Boot-v2. Also, normally errno is never
set to zero by any library function.
This patch fixes this.

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

introduce some env helpers ...

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

export: do not fail on already exported variable ...

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

put env_push_context into postcore_initcall ...

env_push_context only needs malloc, so initialize it earlier.

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

setenv: be robust against setenv(<var>, NULL) ...

Handle value == NULL similiar to how value == '' is currently handled.
hush's builtin_getopt() seems to trigger this for OPTARG.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Init env context a bit earlier in initalization sequence. ...

Ensures subsequent init functions to export environment variables during
init without having to rely on linking order being correct.

Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common/env.c: sparse fixes ...

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

get rid of device ids ...

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

setenv: Fix warning introduced with last commit ...

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

separating environment commands, part 1 ...

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>

adding various doku

saving added docu

adding new doc

doc added and some reorganised

export symbols

Extend 'export' command to take the form export a=b

remove u-boot command paramter flag

introduce local and global variables, add export command

whitespace cleanup