treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: net: fix comment ...

Since commit acc3a3ef90 ("net: environment: update automounts") the tftp
automount mechanism uses all network interfaces.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kbuild: Use ls(1) instead of stat(1) to obtain file size ...

stat(1) is not standardized and different implementations have their own
(conflicting) flags for querying the size of a file.

ls(1) provides the same information (value of st.st_size) in the 5th
column, except when the file is a character or block device. This output
is standardized[0]. The -n option turns on -l, which writes lines
formatted like

  "%s %u %s %s %u %s %s\n", <file mode>, <number of links>,
      <owner name>, <group name>, <size>, <date and time>,
      <pathname>

but instead of writing the <owner name> and <group name>, it writes the
numeric owner and group IDs (this avoids /etc/passwd and /etc/group
lookups as well as potential field splitting issues).

The <size> field is specified as "the value that would be returned for
the file in the st_size field of struct stat".

To avoid duplicating logic in several locations in the tree, create
scripts/file-size.sh and update callers to use that instead of stat(1).

[0] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html#tag_20_73_10

Signed-off-by: Michael Forney <forney@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
[afa: imported script and adjusted barebox stat(1) callsites]
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: Convert init script to C ...

It's hard to get more complicated things right in hush. This commit
converts the /env/bin/init script to C code. With this we get a better
error handling and better control what is being done.

If /env/bin/init exists in the environment then it is still executed
instead of the corresponding C code.

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

console: forbid ctrlc during startup ...

When global.autoboot_abort_key is set to ctrl-c then the user is
expected to press ctrl-c to get to the prompt. The user might press
ctrl-c before the init script runs the "timeout" command. In this
case the init script is aborted at arbitrary places which leads to
inconsistent results depending on the place it is aborted.

This patch introduces the global.console.ctrlc_allowed variable.
When this variable is set to false ctrl-c is ignored entirely.
The variable is set to false by default and changed to true in
the init script.

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

defaultenv: Fix dependencies ...

The defaultenv should be rebuilt once a file in it has changed.
the genenv script always generates the environment file to a temporary
file. Only if it has changed to the last target file the temporary file
is moved over the target file. This means we always have to call genenv,
thus replace "if_changed" with "cmd".
With this dependencies are correctly tracked. New or changed files
result in new image builds whereas unchanged environments do not
unnecessarily result in new images.

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

defaultenv-2: centralize nfs commands for 'net' ...

Setting the nfsroot variable as well as the kernel bootargs for the
interface used to reach the server is specific to nfs, which are used
only if there's no initramfs to load from tftp. Move these statements
within the condition.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: trigger DHCP before booting 'net' ...

Some variables may be set from DHCP requests, as shown below:

    barebox@ZII VF610 Development Board, Rev C:/ echo $global.hostname
    dev-rev-c
    barebox@ZII VF610 Development Board, Rev C:/ echo $global.net.server
    0.0.0.0
    barebox@ZII VF610 Development Board, Rev C:/ dhcp
    eth0: 100Mbps full duplex link detected
    T T T eth0: DHCP client bound to address 192.168.203.31
    barebox@ZII VF610 Development Board, Rev C:/ echo $global.hostname
    zii-dev-rev-c-1
    barebox@ZII VF610 Development Board, Rev C:/ echo $global.net.server
    192.168.203.1
    barebox@ZII VF610 Development Board, Rev C:/

These variables are used by the boot/net script, so it is necessary
to trigger DHCP before we set the TFTP file paths, otherwise booting
from net will fail like below and will need to be triggered twice:

    running /env/bin/init...

    Hit m for menu or any key to stop autoboot:    1
    booting 'net'
    eth0: 100Mbps full duplex link detected
    T T T eth0: DHCP client bound to address 192.168.203.31
    WARNING: eth1: No MAC address set. Using random address 8a:ee:18:f5:98:e7
    T T T T T T T T T T T T T T T T T T T T could not open /mnt/tftp/none-linux-dev-rev-c: No such file or directory
    ERROR: Booting 'net' failed: No such file or directory
    boot: No such file or directory

    type exit to get to the menu
    barebox@ZII VF610 Development Board, Rev C:/ boot
    booting 'net'

    Loading ARM Linux zImage '/mnt/tftp/none-linux-zii-dev-rev-c-1'
    Loaded initrd unknown '/mnt/tftp/none-initramfs-zii-dev-rev-c-1'
    initrd is at 0x82509000-0x835593ff
    Loading devicetree from '/mnt/tftp/none-oftree-zii-dev-rev-c-1'
    commandline:  console=ttyLP0,115200n8 ip=dhcp
    Ucompressing Linux... done, booting the kernel.

To fix this, bring the interfaces up before setting up tftpboot.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: resolve global.net.server before using it ...

global.net.server may contain a hostname, so we have to resolve it
before using it.

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

defaultenv: Pass serverip to nfsroot string ...

This is necessary to allow overwriting the NFS server Linux boots from.

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

defaultenv-2: add bnet script to second stage barebox over net ...

Doing cycling barebox boot over the net is a good testing practice.
It is possible to detect at least some bugs before flushing it to
the system. Suddenly it looks like, it is done not oft enough. So, let's
add this option mainline.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: make abort key to stop autoboot configurable ...

currently supported only two options: any key and ctrl-c
"any key" is default option.
To configure it, use:
nv autoboot_abort_key=any
or
nv autoboot_abort_key=ctrl-c

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

console: move global.allow_color handling to C code ...

We have global.allow_color, but this is limited to the environment
only. Move creation and handling of this variable to C code so that
we can add support for colored output to commands/console controlled
by the same variable.

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

build: fix that defaultenv is always rebuilt ...

From fcffd01 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 26 Dec 2017 16:47:16 +0100
Subject: [PATCH 1/4] build: fix that defaultenv is always rebuilt

Using following pattern:

	target: prerequisite FORCE
		$(call cmd,foo)

is almost always wrong. Due to FORCE target will be rebuilt
using cmd_foo no mater the timestamps.

The following pattern:

	target: prerequisite FORCE
        	$(call if_changed,foo)

Will call cmd_foo only if:
- target is not updated
- or command to built target has changed

But to make this work target must be added to the
list af targets built.
This can be done by assigning target to extra-y or targets.

Use the latter pattern for defaultenv to avoid rebuilding
the environmentt for each build.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: set bootargs correctly for network boot ...

The defaultenv-2 network boot script uses bootargs-ip which
hardcodes eth0 as network device. To make this work with
other nwetork devices use the "ip_route_get" command to determine
the network device used to reach the server.

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

defaultenv: Add README for new network config ...

Network configuration has changed. In case somebody looks
to the old /env/network/ directoy place a README there to add
a pointer how the new configuration is done.

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

net: environment: update automounts ...

Instead of using "ifup ethx" use "ifup -a" which works with all
network interfaces. Also replace "$ethx.serverip" with
"$global.net.server". This makes the automount independent of
the actual network interface. Remove all board specific
/env/init/automount files which were only there to use eth1 instead
of the previously hardcoded eth0.

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

net: environment: remove ethx setup files ...

Network configuration is now done with nvvars, so /env/network/eth*
files are no longer needed. Remove them.

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

Merge branch 'for-next/misc'

defaultenv-2: remove unused *-menu-add-entry calls ...

The *-menu-add-entry functions no longer exist in defaultenv-2, so
remove the calls to these functions.

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

Call boot_board from boot, not from init. ...

This ensures that any board-specific code that must be run at
boot time will be run both when autobooting and when manually
running the 'boot' command from the console.

Signed-off-by: Guillermo Rodriguez <guille.rodriguez@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv: Unblank cursor at startup ...

In some cases, the user program can disable the cursor,
for example, Qt4 library do this, so the cursor remains invisible
after the restart.
The patch adds a command to activate the cursor,
by sending DECTECM command to the terminal.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: add automount for nfs ...

Automatically mount the path that is also used for net booting by
default to /mnt/nfs.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv2: Add automount for RATPFS ...

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

defaultenv: boot/net: Boot initramfs from tftp if present ...

Use an 'initramfs' file if it exists instead of nfsroot. This offers the
possibility to quickly boot complete filesystems as initramfs without
the need to flash an SD-card or similar. If the initramfs does not
exist, it uses the default nfsroot mechanism.

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

login: rework login mechanism ...

We used to have the login functionality in the /env/bin/init script.
This is hard to review and it's too easy to break the login functionality
with changes to this script. Move the places to ask for a password to
C code where we have only a few places where we have to ask for a password.
Mainly these are run_shell() and the menutree command.

This patch introduces a login() function which will only return if the correct
password has been entered. Following calls will return immediately without
asking for a password again.

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

Merge branch 'for-next/misc'

defaultenv-2: init: don't call timeout again if the user intervened ...

With autoboot_timeout=0 the second 'timeout' might not get another
character even if the user keeps a key pressed. So just reuse the key from
the first call.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

defaultenv-2: mtdparts-add: Use new partition parameter ...

mtd devices now have a partition parameter to create mtd partitions.
Use it to simplify the mtdparts-add script.

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

defaultenv-2: mtdparts-add: remove unused variable ...

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