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86f01f0b36dfe01e3de4706318eff7890090b3b3
nwipe/src/gui.c
PartialVolume 86f01f0b36 Fix nwipes behaviour with repeated S key 
Prior to this patch if S key held down keyboard would
be unresponsive for x seconds.
Where x = number of S keystrokes x 3.

Now keys are delayed for no longer than 3 seconds
while warning message is displayed, long enough for
the user to read the warning message.
2020-04-24 23:03:59 +01:00

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/*
* gui.c: An ncurses GUI for nwipe.
*
* Copyright Darik Horn <dajhorn-dban@vanadac.com>.
*
* Modifications to original dwipe Copyright Andy Beverley <andy@andybev.com>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
/* RATIONALE:
*
* This entire GUI is a non-portable task-specific thunk.
*
* The alternatives are, however, no better. The CDK is large and clumsy,
* and things like ncurses libmenu are not worth the storage overhead.
*
*/
#include <ncurses.h>
#include <panel.h>
#include <stdint.h>
#include <time.h>
#include "nwipe.h"
#include "context.h"
#include "method.h"
#include "prng.h"
#include "options.h"
#include "gui.h"
#include "pass.h"
#include "logging.h"
#include "version.h"
#define NWIPE_GUI_PANE 8
/* Header window: width, height, x coordinate, y coordinate. */
#define NWIPE_GUI_HEADER_W COLS
#define NWIPE_GUI_HEADER_H 1
#define NWIPE_GUI_HEADER_X 0
#define NWIPE_GUI_HEADER_Y 0
/* Footer window: width, height, x coordinate, y coordinate. */
#define NWIPE_GUI_FOOTER_W COLS
#define NWIPE_GUI_FOOTER_H 1
#define NWIPE_GUI_FOOTER_X 0
#define NWIPE_GUI_FOOTER_Y ( LINES - 1 )
/* Options window: width, height, x coorindate, y coordinate. */
#define NWIPE_GUI_OPTIONS_W 44
#define NWIPE_GUI_OPTIONS_H 7
#define NWIPE_GUI_OPTIONS_Y 1
#define NWIPE_GUI_OPTIONS_X 0
/* Options fields, relative to their window. */
#define NWIPE_GUI_OPTIONS_TAB 10
#define NWIPE_GUI_OPTIONS_ENTROPY_Y 1
#define NWIPE_GUI_OPTIONS_ENTROPY_X 1
#define NWIPE_GUI_OPTIONS_PRNG_Y 2
#define NWIPE_GUI_OPTIONS_PRNG_X 1
#define NWIPE_GUI_OPTIONS_METHOD_Y 3
#define NWIPE_GUI_OPTIONS_METHOD_X 1
#define NWIPE_GUI_OPTIONS_VERIFY_Y 4
#define NWIPE_GUI_OPTIONS_VERIFY_X 1
#define NWIPE_GUI_OPTIONS_ROUNDS_Y 5
#define NWIPE_GUI_OPTIONS_ROUNDS_X 1
/* Stats window: width, height, x coordinate, y coordinate. */
#define NWIPE_GUI_STATS_W ( COLS - 44 )
#define NWIPE_GUI_STATS_H 7
#define NWIPE_GUI_STATS_Y 1
#define NWIPE_GUI_STATS_X 44
/* Stats fields, relative to their window. */
#define NWIPE_GUI_STATS_RUNTIME_Y 1
#define NWIPE_GUI_STATS_RUNTIME_X 1
#define NWIPE_GUI_STATS_ETA_Y 2
#define NWIPE_GUI_STATS_ETA_X 1
#define NWIPE_GUI_STATS_LOAD_Y 3
#define NWIPE_GUI_STATS_LOAD_X 1
#define NWIPE_GUI_STATS_THROUGHPUT_Y 4
#define NWIPE_GUI_STATS_THROUGHPUT_X 1
#define NWIPE_GUI_STATS_ERRORS_Y 5
#define NWIPE_GUI_STATS_ERRORS_X 1
#define NWIPE_GUI_STATS_TAB 16
/* Select window: width, height, x coordinate, y coordinate. */
#define NWIPE_GUI_MAIN_W COLS
#define NWIPE_GUI_MAIN_H ( LINES - NWIPE_GUI_MAIN_Y - 1 )
#define NWIPE_GUI_MAIN_Y 8
#define NWIPE_GUI_MAIN_X 0
#define SKIP_DEV_PREFIX 5
/* Window pointers. */
WINDOW* footer_window;
WINDOW* header_window;
WINDOW* main_window;
WINDOW* options_window;
WINDOW* stats_window;
PANEL* footer_panel;
PANEL* header_panel;
PANEL* main_panel;
PANEL* options_panel;
PANEL* stats_panel;
/* Options window title. */
const char* options_title = " Options ";
/* Statistics window title. */
const char* stats_title = " Statistics ";
/* Footer labels. */
const char* main_window_footer = "S=Start M=Method P=PRNG V=Verify R=Rounds B=Blanking Space=Select Ctrl-C=Quit";
const char* main_window_footer_warning_lower_case_s =
" WARNING: To start the wipe press capital S, you pressed lower case s ";
const char* main_window_footer_warning_no_drive_selected =
" No drives selected, use spacebar to select a drive, then press S to start ";
const char* selection_footer = "J=Down K=Up Space=Select Backspace=Cancel Ctrl-C=Quit";
const char* end_wipe_footer = "B=Blank screen Ctrl-C=Quit";
const char* rounds_footer = "Left=Erase Esc=Cancel Ctrl-C=Quit";
const char* wipes_finished_footer = "Wipe finished - press enter to exit. Logged to STDOUT";
/* The number of lines available in the terminal */
int stdscr_lines;
/* The number of columns available in the terminal */
int stdscr_cols;
/* The size of the terminal lines when previously checked */
int stdscr_lines_previous;
/* The size of the terminal columns when previously checked */
int stdscr_cols_previous;
void nwipe_gui_title( WINDOW* w, const char* s )
{
/**
* Prints the string 's' centered on the first line of the window 'w'.
*/
/* The number of lines in the window. (Not used.) */
int wy;
(void) wy; /* flag wy not used to the compiler, to silence warning */
/* The number of columns in the window. */
int wx;
/* Get the window dimensions. */
getmaxyx( w, wy, wx );
/*Calculate available total margin */
int margin = ( wx - strlen( s ) );
if( margin < 0 )
{
margin = 0;
}
/* Print the title. */
mvwprintw( w, 0, margin / 2, "%s", s );
} /* nwipe_gui_title */
void nwipe_gui_init( void )
{
/**
* Initializes the ncurses gui.
*/
/* Initialize the screen. */
initscr();
/* Disable TTY line buffering. */
cbreak();
/* Disable TTY echo. */
noecho();
/* Enable most special keys. */
keypad( stdscr, TRUE );
if( has_colors() )
{
/* Initialize color capabilities. */
start_color();
if( can_change_color() )
{
/* Redefine cyan to gray. */
init_color( COLOR_CYAN, 128, 128, 128 );
}
/* Set white on blue as the emphasis color. */
init_pair( 1, COLOR_WHITE, COLOR_BLUE );
/* Set gray (or cyan) on blue as the normal color. */
init_pair( 2, COLOR_CYAN, COLOR_BLUE );
/* Set red on blue as the hilite color. */
init_pair( 3, COLOR_RED, COLOR_BLUE );
/* Set blue on white as the color for the header and footer windows. */
init_pair( 4, COLOR_BLUE, COLOR_WHITE );
/* Set white on green for success messages. */
init_pair( 5, COLOR_WHITE, COLOR_GREEN );
/* Set white on red for failure messages. */
init_pair( 6, COLOR_WHITE, COLOR_RED );
/* Set black on black for when hiding the display. */
init_pair( 7, COLOR_BLACK, COLOR_BLACK );
/* Set green on blue for reverse bold messages */
init_pair( 8, COLOR_GREEN, COLOR_WHITE );
/* Set green on blue for reverse bold error messages */
init_pair( 9, COLOR_RED, COLOR_WHITE );
/* Set black on yellow for warning messages */
init_pair( 10, COLOR_BLACK, COLOR_YELLOW );
/* Set the background style. */
wbkgdset( stdscr, COLOR_PAIR( 1 ) | ' ' );
}
/* Clear the screen. */
wclear( stdscr );
/* Create the header window. */
nwipe_gui_create_header_window();
/* Create the footer window and panel */
nwipe_gui_create_footer_window( main_window_footer );
/* Create the options window and panel */
nwipe_gui_create_options_window();
/* Create the stats window. */
nwipe_gui_create_stats_window();
/* Create a new main window and panel */
nwipe_gui_create_main_window();
update_panels();
doupdate();
/* Hide the cursor. */
curs_set( 0 );
} /* nwipe_gui_init */
void nwipe_gui_free( void )
{
/**
* Releases the ncurses gui.
*
*/
/* Free ncurses resources. */
if( del_panel( footer_panel ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting footer panel failed!." );
}
if( del_panel( header_panel ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting header panel failed!." );
}
if( del_panel( main_panel ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting main panel failed!." );
}
if( del_panel( options_panel ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting options panel failed!." );
}
if( del_panel( stats_panel ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting stats panel failed!." );
}
if( delwin( footer_window ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting footer window failed!." );
}
if( delwin( header_window ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting header window failed!." );
}
if( delwin( main_window ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting main window failed!." );
}
if( delwin( options_window ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting options window failed!." );
}
if( delwin( stats_window ) != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Deleting stats window failed!." );
}
if( endwin() != OK )
{
nwipe_log( NWIPE_LOG_ERROR, "Curses endwin() failed !" );
}
} /* nwipe_gui_free */
void nwipe_gui_create_main_window()
{
/* Create the main window. */
main_window = newwin( NWIPE_GUI_MAIN_H, NWIPE_GUI_MAIN_W, NWIPE_GUI_MAIN_Y, NWIPE_GUI_MAIN_X );
main_panel = new_panel( main_window );
if( has_colors() )
{
/* Set the background style. */
wbkgdset( main_window, COLOR_PAIR( 1 ) | ' ' );
/* Apply the color change. */
wattron( main_window, COLOR_PAIR( 1 ) );
}
/* Clear the main window. */
werase( main_window );
/* Add a border. */
box( main_window, 0, 0 );
/* refresh main window */
wnoutrefresh( main_window );
} /* nwipe_gui_create_main_window */
void nwipe_gui_create_header_window()
{
/* Create the header window. */
header_window = newwin( NWIPE_GUI_HEADER_H, NWIPE_GUI_HEADER_W, NWIPE_GUI_HEADER_Y, NWIPE_GUI_HEADER_X );
header_panel = new_panel( header_window );
if( has_colors() )
{
/* Set the background style of the header window. */
wbkgdset( header_window, COLOR_PAIR( 4 ) | ' ' );
}
/* Clear the header window. */
werase( header_window );
/* Print the product banner. */
nwipe_gui_title( header_window, banner );
/* Refresh the header window */
wnoutrefresh( header_window );
} /* nwipe_gui_create_header_window */
void nwipe_gui_create_footer_window( const char* footer_text )
{
/* Create the footer window. */
footer_window = newwin( NWIPE_GUI_FOOTER_H, NWIPE_GUI_FOOTER_W, NWIPE_GUI_FOOTER_Y, NWIPE_GUI_FOOTER_X );
footer_panel = new_panel( footer_window );
if( has_colors() )
{
/* Set the background style of the footer window. */
wbkgdset( footer_window, COLOR_PAIR( 4 ) | ' ' );
}
/* Erase the footer window. */
werase( footer_window );
/* Add help text to the footer */
nwipe_gui_title( footer_window, footer_text );
/* Refresh the footer window */
wnoutrefresh( footer_window );
} /* nwipe_gui_create_footer_window */
void nwipe_gui_amend_footer_window( const char* footer_text )
{
/* Clear the footer window. */
werase( footer_window );
/* Add help text to the footer */
nwipe_gui_title( footer_window, footer_text );
/* Refresh the footer window */
wnoutrefresh( footer_window );
} /* nwipe_gui_amend_footer_window */
void nwipe_gui_create_options_window()
{
/* Create the options window. */
options_window = newwin( NWIPE_GUI_OPTIONS_H, NWIPE_GUI_OPTIONS_W, NWIPE_GUI_OPTIONS_Y, NWIPE_GUI_OPTIONS_X );
options_panel = new_panel( options_window );
if( has_colors() )
{
/* Set the background style of the options window. */
wbkgdset( options_window, COLOR_PAIR( 1 ) | ' ' );
/* Apply the color change to the options window. */
wattron( options_window, COLOR_PAIR( 1 ) );
}
/* Clear the options window. */
werase( options_window );
/* Add a border. */
box( options_window, 0, 0 );
} /* nwipe_gui_create_options_window */
void nwipe_gui_create_stats_window()
{
/* Create the stats window. */
stats_window = newwin( NWIPE_GUI_STATS_H, NWIPE_GUI_STATS_W, NWIPE_GUI_STATS_Y, NWIPE_GUI_STATS_X );
stats_panel = new_panel( stats_window );
if( has_colors() )
{
/* Set the background style of the stats window. */
wbkgdset( stats_window, COLOR_PAIR( 1 ) | ' ' );
/* Apply the color change to the stats window. */
wattron( stats_window, COLOR_PAIR( 1 ) );
}
/* Clear the new window. */
werase( stats_window );
/* Add a border. */
box( stats_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( stats_window, stats_title );
/* Print field labels. */
mvwprintw( stats_window, NWIPE_GUI_STATS_RUNTIME_Y, NWIPE_GUI_STATS_RUNTIME_X, "Runtime: " );
mvwprintw( stats_window, NWIPE_GUI_STATS_ETA_Y, NWIPE_GUI_STATS_ETA_X, "Remaining: " );
mvwprintw( stats_window, NWIPE_GUI_STATS_LOAD_Y, NWIPE_GUI_STATS_LOAD_X, "Load Averages: " );
mvwprintw( stats_window, NWIPE_GUI_STATS_THROUGHPUT_Y, NWIPE_GUI_STATS_THROUGHPUT_X, "Throughput: " );
mvwprintw( stats_window, NWIPE_GUI_STATS_ERRORS_Y, NWIPE_GUI_STATS_ERRORS_X, "Errors: " );
} /* nwipe_gui_create_stats_window */
void nwipe_gui_create_all_windows_on_terminal_resize( const char* footer_text )
{
/* Get the terminal size */
getmaxyx( stdscr, stdscr_lines, stdscr_cols );
/* If the user has resized the terminal then recreate the windows and panels */
if( stdscr_cols_previous != stdscr_cols || stdscr_lines_previous != stdscr_lines )
{
/* save the revised terminal size so we check whether the user has resized next time */
stdscr_lines_previous = stdscr_lines;
stdscr_cols_previous = stdscr_cols;
/* Clear the screen. */
wclear( stdscr );
/* Create a new header window and panel due to terminal size having changed */
nwipe_gui_create_header_window();
/* Create a new main window and panel due to terminal size having changed */
nwipe_gui_create_main_window();
/* Create a new footer window and panel due to terminal size having changed */
nwipe_gui_create_footer_window( footer_text );
/* Create a new options window and panel due to terminal size having changed */
nwipe_gui_create_options_window();
/* Create a new stats window and panel due to terminal size having changed */
nwipe_gui_create_stats_window();
/* Update the options window. */
nwipe_gui_options();
update_panels();
doupdate();
}
}
void nwipe_gui_select( int count, nwipe_context_t** c )
{
/**
* The primary user interface. Allows the user to
* change options and specify the devices to be wiped.
*
* @parameter count The number of contexts in the array.
* @parameter c An array of device contexts.
*
* @modifies c[].select Sets the select flag according to user input.
* @modifies options Sets program options according to to user input.
*
*/
extern int terminate_signal;
/* Widget labels. */
const char* select_title = " Disks and Partitions ";
/* The number of lines available in the window. */
int wlines;
/* The number of columns available in the window. */
int wcols;
/* The number of selection elements that we can show in the window. */
int slots;
/* The index of the element that is visible in the first slot. */
int offset = 0;
/* The selection focus. */
int focus = 0;
/* A generic loop variable. */
int i = 0;
/* User input buffer. */
int keystroke;
/* The current working line. */
int yy;
/* Flag, Valid key hit = 1, anything else = 0 */
int validkeyhit;
/* counts number of drives and partitions that have been selected */
int number_of_selected_contexts = 0;
/* Control A toggle status -1=indefined, 0=all drives delected, 1=all drives selected */
int select_all_toggle_status = -1;
/* Get the terminal size */
getmaxyx( stdscr, stdscr_lines, stdscr_cols );
/* save the terminal size so we check whether the user has resized */
stdscr_lines_previous = stdscr_lines;
stdscr_cols_previous = stdscr_cols;
do
{
nwipe_gui_create_all_windows_on_terminal_resize( main_window_footer );
/* There is one slot per line. */
getmaxyx( main_window, wlines, wcols );
/* Less two lines for the box and two lines for padding. */
slots = wlines - 4;
if( slots < 0 )
{
slots = 0;
}
/* The code here adjusts the offset value, required when the terminal is resized vertically */
if( slots > count )
{
offset = 0;
}
else
{
if( focus >= count )
{
/* The focus is already at the last element. */
focus = count - 1;
}
if( focus < 0 )
{
/* The focus is already at the last element. */
focus = 0;
}
}
if( count >= slots && slots > 0 )
{
offset = focus + 1 - slots;
if( offset < 0 )
{
offset = 0;
}
}
/* Clear the main window, necessary when switching selections such as method etc */
werase( main_window );
/* Refresh main window */
wnoutrefresh( main_window );
/* If the user selected an option the footer text would have changed.
* Here we set it back to the main key help text */
nwipe_gui_create_footer_window( main_window_footer );
/* Refresh the stats window */
wnoutrefresh( stats_window );
/* Refresh the options window */
wnoutrefresh( options_window );
/* Update the options window. */
nwipe_gui_options();
/* Initialize the line offset. */
yy = 2;
for( i = 0; i < slots && i < count; i++ )
{
/* Move to the next line. */
mvwprintw( main_window, yy++, 1, " " );
if( i + offset == focus )
{
if( c[focus]->select == NWIPE_SELECT_TRUE || c[focus]->select == NWIPE_SELECT_FALSE )
{
/* Print the 'enabled' cursor. */
waddch( main_window, ACS_RARROW );
}
else
{
/* Print the 'disabled' cursor. */
waddch( main_window, ACS_DIAMOND );
}
}
else
{
/* Print whitespace. */
waddch( main_window, ' ' );
}
/* In the event of the offset value some how becoming invalid, this if statement will prevent a segfault
* and the else part will log the out of bounds values for debugging */
if( i + offset >= 0 && i + offset < count )
{
switch( c[i + offset]->select )
{
case NWIPE_SELECT_TRUE:
wprintw( main_window, " [wipe] %i. %s", ( i + offset + 1 ), c[i + offset]->device_label );
break;
case NWIPE_SELECT_FALSE:
/* Print an element that is not selected. */
wprintw( main_window, " [ ] %i. %s", ( i + offset + 1 ), c[i + offset]->device_label );
break;
case NWIPE_SELECT_TRUE_PARENT:
/* This element will be wiped when its parent is wiped. */
wprintw( main_window, " [****] %i. %s", ( i + offset + 1 ), c[i + offset]->device_label );
break;
case NWIPE_SELECT_FALSE_CHILD:
/* We can't wipe this element because it has a child that is being wiped. */
wprintw( main_window, " [----] %i. %s", ( i + offset + 1 ), c[i + offset]->device_label );
break;
case NWIPE_SELECT_DISABLED:
/* We don't know how to wipe this device. (Iomega Zip drives.) */
wprintw( main_window, " [????] %s", "Unrecognized Device" );
break;
default:
/* TODO: Handle the sanity error. */
break;
} /* switch select */
}
else
{
nwipe_log( NWIPE_LOG_DEBUG,
"GUI.c,nwipe_gui_select(), scroll, array index out of bounds, i=%u, count=%u, slots=%u, "
"focus=%u, offset=%u",
i,
count,
slots,
focus,
offset );
}
} /* for */
if( offset > 0 )
{
mvwprintw( main_window, 1, wcols - 8, " More " );
waddch( main_window, ACS_UARROW );
}
if( count - offset > slots )
{
mvwprintw( main_window, wlines - 2, wcols - 8, " More " );
waddch( main_window, ACS_DARROW );
}
/* Draw a border around the menu window. */
box( main_window, 0, 0 );
/* Print a title. */
nwipe_gui_title( main_window, select_title );
/* Refresh the window. */
wnoutrefresh( main_window );
/* Output to physical screen */
doupdate();
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
do
{
validkeyhit = 0;
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get user input.
timeout( -1 ); // Switch back to blocking mode.
/* We don't necessarily use these but for future reference, here are some cntrl + key values
* ^W - 23, ^E - 5, ^R - 18, ^T - 20, ^Y - 25, ^U - 21, ^I - 9, ^O - 15, ^P - 16, ^A - 1, ^D - 4
* ^F - 6, ^G - 7, ^H - 8, ^K - 11, ^L - 12, ^X - 24, ^V - 22, ^B - 2, ^N - 14
* Use nwipe_log( NWIPE_LOG_DEBUG, "Key Name: %s - %u", keyname(keystroke),keystroke) to
* figure out what code is returned by what ever key combination */
switch( keystroke )
{
case KEY_DOWN:
case 'j':
case 'J':
validkeyhit = 1;
/* Increment the focus. */
focus += 1;
if( focus >= count )
{
/* The focus is already at the last element. */
focus = count - 1;
break;
}
if( focus - offset >= slots )
{
/* The next element is offscreen. Scroll down. */
offset += 1;
break;
}
break;
case KEY_UP:
case 'k':
case 'K':
validkeyhit = 1;
/* Decrement the focus. */
focus -= 1;
if( focus < 0 )
{
/* The focus is already at the last element. */
focus = 0;
break;
}
if( focus < offset )
{
/* The next element is offscreen. Scroll up. */
offset -= 1;
break;
}
break;
case KEY_ENTER:
case 10:
case ' ':
validkeyhit = 1;
/* TODO: This block should be made into a function. */
if( c[focus]->select == NWIPE_SELECT_TRUE )
{
/* Reverse the selection of this element. */
c[focus]->select = NWIPE_SELECT_FALSE;
if( c[focus]->device_part == 0 )
{
/* Sub-deselect all partitions and slices within this disk. */
for( i = 0; i < count; i++ )
{
if( c[i]->device_type == c[focus]->device_type
&& c[i]->device_host == c[focus]->device_host
&& c[i]->device_bus == c[focus]->device_bus
&& c[i]->device_target == c[focus]->device_target
&& c[i]->device_lun == c[focus]->device_lun && c[i]->device_part > 0 )
{
c[i]->select = NWIPE_SELECT_FALSE;
}
} /* for all contexts */
} /* if sub-deselect */
else
{
/* The number of selected partitions or slices within this disk. */
int j = 0;
for( i = 0; i < count; i++ )
{
if( c[i]->device_type == c[focus]->device_type
&& c[i]->device_host == c[focus]->device_host
&& c[i]->device_bus == c[focus]->device_bus
&& c[i]->device_target == c[focus]->device_target
&& c[i]->device_lun == c[focus]->device_lun && c[i]->device_part > 0
&& c[i]->select == NWIPE_SELECT_TRUE )
{
/* Increment the counter. */
j += 1;
}
} /* for all contexts */
if( j == 0 )
{
/* Find the parent disk of this partition or slice. */
for( i = 0; i < count; i++ )
{
if( c[i]->device_type == c[focus]->device_type
&& c[i]->device_host == c[focus]->device_host
&& c[i]->device_bus == c[focus]->device_bus
&& c[i]->device_target == c[focus]->device_target
&& c[i]->device_lun == c[focus]->device_lun && c[i]->device_part == 0 )
{
/* Enable the disk element. */
c[i]->select = NWIPE_SELECT_FALSE;
}
} /* for all contexts */
} /* if */
} /* else super-enable */
break;
} /* if NWIPE_SELECT_TRUE */
if( c[focus]->select == NWIPE_SELECT_FALSE )
{
/* Reverse the selection. */
c[focus]->select = NWIPE_SELECT_TRUE;
if( c[focus]->device_part == 0 )
{
/* Sub-select all partitions and slices within this disk. */
for( i = 0; i < count; i++ )
{
if( c[i]->device_type == c[focus]->device_type
&& c[i]->device_host == c[focus]->device_host
&& c[i]->device_bus == c[focus]->device_bus
&& c[i]->device_target == c[focus]->device_target
&& c[i]->device_lun == c[focus]->device_lun && c[i]->device_part > 0 )
{
c[i]->select = NWIPE_SELECT_TRUE_PARENT;
}
} /* for */
} /* if sub-select */
else
{
/* ASSERT: ( c[focus]->device_part > 0 ) */
/* Super-deselect the disk that contains this device. */
for( i = 0; i < count; i++ )
{
if( c[i]->device_type == c[focus]->device_type
&& c[i]->device_host == c[focus]->device_host
&& c[i]->device_bus == c[focus]->device_bus
&& c[i]->device_target == c[focus]->device_target
&& c[i]->device_lun == c[focus]->device_lun && c[i]->device_part == 0 )
{
c[i]->select = NWIPE_SELECT_FALSE_CHILD;
}
}
} /* else super-deselect */
break;
} /* if NWIPE_SELECT_FALSE */
/* TODO: Explain to the user why they can't change this. */
break;
case 'm':
case 'M':
validkeyhit = 1;
/* Run the method dialog. */
nwipe_gui_method();
break;
case 'p':
case 'P':
validkeyhit = 1;
/* Run the PRNG dialog. */
nwipe_gui_prng();
break;
case 'r':
case 'R':
validkeyhit = 1;
/* Run the rounds dialog. */
nwipe_gui_rounds();
break;
case 'v':
case 'V':
validkeyhit = 1;
/* Run the option dialog. */
nwipe_gui_verify();
break;
case 'b':
case 'B':
validkeyhit = 1;
/* Run the noblank dialog. */
nwipe_gui_noblank();
break;
case 'S':
/* User wants to start the wipe */
validkeyhit = 1;
/* Have any drives have been selected ? */
number_of_selected_contexts = 0;
for( i = 0; i < count; i++ )
{
if( c[i]->select == NWIPE_SELECT_TRUE )
{
number_of_selected_contexts += 1;
}
}
/* if no drives have been selected, print a warning on the footer */
if( number_of_selected_contexts == 0 )
{
wattron( footer_window, COLOR_PAIR( 10 ) );
nwipe_gui_amend_footer_window( main_window_footer_warning_no_drive_selected );
doupdate();
sleep( 3 );
wattroff( footer_window, COLOR_PAIR( 10 ) );
/* After the delay return footer text back to key help */
nwipe_gui_amend_footer_window( main_window_footer );
doupdate();
/* Remove any repeated S key strokes, without this the gui would hang
* for a period of time, i.e sleep above x number of repeated 's' keystrokes
* which could run into minutes */
do
{
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get user input.
timeout( -1 ); // Switch back to blocking mode.
} while( keystroke == 'S' );
/* Remove the S from keystroke, which allows us to stay within the selection menu loop */
keystroke = 0;
}
break;
case 's':
/* user has mistakenly hit the lower case 's' instead of capital 'S' */
validkeyhit = 1;
/* Warn the user about their mistake */
wattron( footer_window, COLOR_PAIR( 10 ) );
nwipe_gui_amend_footer_window( main_window_footer_warning_lower_case_s );
doupdate();
sleep( 3 );
wattroff( footer_window, COLOR_PAIR( 10 ) );
/* After the delay return footer text back to key help */
nwipe_gui_amend_footer_window( main_window_footer );
doupdate();
/* Remove any repeated s key strokes, without this the gui would hang
* for a period of time, i.e sleep above x number of repeated 's' keystrokes
* which could run into minutes */
do
{
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get user input.
timeout( -1 ); // Switch back to blocking mode.
} while( keystroke == 's' );
break;
case 1:
/* Ctrl A - Toggle select/deselect all drives */
validkeyhit = 1;
if( select_all_toggle_status == -1 || select_all_toggle_status == 0 )
{
for( i = 0; i < count; i++ )
{
c[i]->select = NWIPE_SELECT_TRUE;
}
select_all_toggle_status = 1;
}
else
{
if( select_all_toggle_status == 1 )
{
for( i = 0; i < count; i++ )
{
c[i]->select = NWIPE_SELECT_FALSE;
}
select_all_toggle_status = 0;
}
else
{
nwipe_log(
NWIPE_LOG_ERROR,
"gui.c:nwipe_gui_select(), Invalid value in variable select_all_toggle_status = %d",
select_all_toggle_status );
}
}
break;
} /* keystroke switch */
/* Check the terminal size, if the user has changed it the while loop checks for
* this change and exits the valid key hit loop so the windows can be updated */
getmaxyx( stdscr, stdscr_lines, stdscr_cols );
} /* key hit loop */
while( validkeyhit == 0 && terminate_signal != 1 && stdscr_cols_previous == stdscr_cols
&& stdscr_lines_previous == stdscr_lines );
} while( keystroke != 'S' && terminate_signal != 1 );
} /* nwipe_gui_select */
void nwipe_gui_options( void )
{
/**
* Updates the options window.
*
* @modifies options_window
*
*/
/* Erase the window. */
werase( options_window );
mvwprintw(
options_window, NWIPE_GUI_OPTIONS_ENTROPY_Y, NWIPE_GUI_OPTIONS_ENTROPY_X, "Entropy: Linux Kernel (urandom)" );
mvwprintw(
options_window, NWIPE_GUI_OPTIONS_PRNG_Y, NWIPE_GUI_OPTIONS_PRNG_X, "PRNG: %s", nwipe_options.prng->label );
mvwprintw( options_window,
NWIPE_GUI_OPTIONS_METHOD_Y,
NWIPE_GUI_OPTIONS_METHOD_X,
"Method: %s",
nwipe_method_label( nwipe_options.method ) );
mvwprintw( options_window, NWIPE_GUI_OPTIONS_VERIFY_Y, NWIPE_GUI_OPTIONS_VERIFY_X, "Verify: " );
switch( nwipe_options.verify )
{
case NWIPE_VERIFY_NONE:
wprintw( options_window, "Off" );
break;
case NWIPE_VERIFY_LAST:
wprintw( options_window, "Last Pass" );
break;
case NWIPE_VERIFY_ALL:
wprintw( options_window, "All Passes" );
break;
default:
wprintw( options_window, "Unknown %i", nwipe_options.verify );
} /* switch verify */
mvwprintw( options_window, NWIPE_GUI_OPTIONS_ROUNDS_Y, NWIPE_GUI_OPTIONS_ROUNDS_X, "Rounds: " );
if( nwipe_options.noblank )
{
wprintw( options_window, "%i (no final blanking pass)", nwipe_options.rounds );
}
else
{
wprintw( options_window, "%i (plus blanking pass)", nwipe_options.rounds );
}
/* Add a border. */
box( options_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( options_window, options_title );
/* Refresh the window. */
// wrefresh( options_window );
wnoutrefresh( options_window );
} /* nwipe_gui_options */
void nwipe_gui_rounds( void )
{
/**
* Allows the user to change the rounds option.
*
* @modifies nwipe_options.rounds
* @modifies main_window
*
*/
/* Set the initial focus. */
int focus = nwipe_options.rounds;
/* The first tabstop. */
const int tab1 = 2;
/* The current working row. */
int yy;
/* Input buffer. */
int keystroke;
extern int terminate_signal;
/* Update the footer window. */
werase( footer_window );
nwipe_gui_title( footer_window, rounds_footer );
wrefresh( footer_window );
do
{
/* Erase the main window. */
werase( main_window );
nwipe_gui_create_all_windows_on_terminal_resize( selection_footer );
/* Add a border. */
box( main_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( main_window, " Rounds " );
/* Initialize the working row. */
yy = 4;
mvwprintw( main_window, yy++, tab1, "This is the number of times to run the wipe method on each device." );
mvwprintw( main_window, yy++, tab1, "" );
if( focus > 0 )
{
/* Print the syslinux configuration hint. */
mvwprintw( main_window, yy++, tab1, "syslinux.cfg: nuke=\"nwipe --rounds %i\"", focus );
/* Print this line last so that the cursor is in the right place. */
mvwprintw( main_window, 2, tab1, "> %i", focus );
}
else
{
mvwprintw( main_window, yy++, tab1, "The number of rounds must be a non-negative integer." );
/* Print this line last so that the cursor is in the right place. */
mvwprintw( main_window, 2, tab1, "> " );
}
/* Reveal the cursor. */
curs_set( 1 );
/* Refresh the window. */
wrefresh( main_window );
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get a keystroke.
timeout( -1 ); // Switch back to blocking mode.
switch( keystroke )
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if( focus < 100000000 )
{
/* Left shift, base ten. */
focus *= 10;
/* This assumes ASCII input, where the zero character is 0x30. */
focus += keystroke - 48;
}
break;
/* Escape key. */
case 27:
return;
case KEY_BACKSPACE:
case KEY_LEFT:
case 127:
/* Right shift, base ten. */
focus /= 10;
break;
} /* switch keystroke */
/* Hide the cursor. */
curs_set( 0 );
} while( keystroke != 10 && terminate_signal != 1 );
if( focus > 0 )
{
/* Set the number of rounds. */
nwipe_options.rounds = focus;
}
} /* nwipe_guid_rounds */
void nwipe_gui_prng( void )
{
/**
* Allows the user to change the PRNG.
*
* @modifies nwipe_options.prng
* @modifies main_window
*
*/
extern nwipe_prng_t nwipe_twister;
extern nwipe_prng_t nwipe_isaac;
extern int terminate_signal;
/* The number of implemented PRNGs. */
const int count = 2;
/* The first tabstop. */
const int tab1 = 2;
/* The second tabstop. */
const int tab2 = 30;
/* Set the initial focus. */
int focus = 0;
/* The current working row. */
int yy;
/* Input buffer. */
int keystroke;
/* Update the footer window. */
werase( footer_window );
nwipe_gui_title( footer_window, selection_footer );
wrefresh( footer_window );
if( nwipe_options.prng == &nwipe_twister )
{
focus = 0;
}
if( nwipe_options.prng == &nwipe_isaac )
{
focus = 1;
}
do
{
/* Clear the main window. */
werase( main_window );
nwipe_gui_create_all_windows_on_terminal_resize( selection_footer );
/* Initialize the working row. */
yy = 2;
/* Print the options. */
mvwprintw( main_window, yy++, tab1, "" );
mvwprintw( main_window, yy++, tab1, "" );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_twister.label );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_isaac.label );
mvwprintw( main_window, yy++, tab1, "" );
/* Print the cursor. */
mvwaddch( main_window, 4 + focus, tab1, ACS_RARROW );
switch( focus )
{
case 0:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --prng twister\"" );
mvwprintw( main_window,
yy++,
tab1,
"The Mersenne Twister, by Makoto Matsumoto and Takuji Nishimura, is a " );
mvwprintw( main_window,
yy++,
tab1,
"generalized feedback shift register PRNG that is uniform and " );
mvwprintw( main_window,
yy++,
tab1,
"equidistributed in 623-dimensions with a proven period of 2^19937-1. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"This implementation passes the Marsaglia Diehard test suite. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
break;
case 1:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --prng isaac\"" );
mvwprintw( main_window,
yy++,
tab1,
"ISAAC, by Bob Jenkins, is a PRNG derived from RC4 with a minimum period of " );
mvwprintw( main_window,
yy++,
tab1,
"2^40 and an expected period of 2^8295. It is difficult to recover the " );
mvwprintw( main_window,
yy++,
tab1,
"initial PRNG state by cryptanalysis of the ISAAC stream. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
break;
} /* switch */
/* Add a border. */
box( main_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( main_window, " Pseudo Random Number Generator " );
/* Refresh the window. */
wrefresh( main_window );
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get a keystroke.
timeout( -1 ); // Switch back to blocking mode.
switch( keystroke )
{
case KEY_DOWN:
case 'j':
case 'J':
if( focus < count - 1 )
{
focus += 1;
}
break;
case KEY_UP:
case 'k':
case 'K':
if( focus > 0 )
{
focus -= 1;
}
break;
case KEY_ENTER:
case ' ':
case 10:
if( focus == 0 )
{
nwipe_options.prng = &nwipe_twister;
}
if( focus == 1 )
{
nwipe_options.prng = &nwipe_isaac;
}
return;
case KEY_BACKSPACE:
case KEY_BREAK:
return;
} /* switch */
} while( terminate_signal != 1 );
} /* nwipe_gui_prng */
void nwipe_gui_verify( void )
{
/**
* Allows the user to change the verification option.
*
* @modifies nwipe_options.verify
* @modifies main_window
*
*/
extern int terminate_signal;
/* The number of definitions in the nwipe_verify_t enumeration. */
const int count = 3;
/* The first tabstop. */
const int tab1 = 2;
/* The second tabstop. */
const int tab2 = 30;
/* Set the initial focus. */
int focus = nwipe_options.verify;
/* The current working row. */
int yy;
/* Input buffer. */
int keystroke;
/* Update the footer window. */
werase( footer_window );
nwipe_gui_title( footer_window, selection_footer );
wrefresh( footer_window );
do
{
nwipe_gui_create_all_windows_on_terminal_resize( selection_footer );
/* Clear the main window. */
werase( main_window );
/* Initialize the working row. */
yy = 2;
/* Print the options. */
mvwprintw( main_window, yy++, tab1, " Verification Off " );
mvwprintw( main_window, yy++, tab1, " Verify Last Pass " );
mvwprintw( main_window, yy++, tab1, " Verify All Passes " );
mvwprintw( main_window, yy++, tab1, " " );
/* Print the cursor. */
mvwaddch( main_window, 2 + focus, tab1, ACS_RARROW );
switch( focus )
{
case 0:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --verify off\"" );
mvwprintw( main_window,
yy++,
tab1,
"Do not verify passes. The wipe will be a write-only operation. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
break;
case 1:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --verify last\"" );
mvwprintw( main_window,
yy++,
tab1,
"Check whether the device is actually empty after the last pass fills the " );
mvwprintw( main_window,
yy++,
tab1,
"device with zeros. " );
break;
case 2:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --verify all\"" );
mvwprintw( main_window,
yy++,
tab1,
"After every pass, read back the pattern and check whether it is correct. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"This program writes the entire length of the device before it reads back " );
mvwprintw( main_window,
yy++,
tab1,
"for verification, even for random pattern passes, to better ensure that " );
mvwprintw( main_window,
yy++,
tab1,
"hardware caches are actually flushed. " );
break;
} /* switch */
/* Add a border. */
box( main_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( main_window, " Verification Mode " );
/* Refresh the window. */
wrefresh( main_window );
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get a keystroke.
timeout( -1 ); // Switch back to blocking mode.
switch( keystroke )
{
case KEY_DOWN:
case 'j':
case 'J':
if( focus < count - 1 )
{
focus += 1;
}
break;
case KEY_UP:
case 'k':
case 'K':
if( focus > 0 )
{
focus -= 1;
}
break;
case KEY_ENTER:
case ' ':
case 10:
if( focus >= 0 && focus < count )
{
nwipe_options.verify = focus;
}
if( nwipe_options.verify != NWIPE_VERIFY_NONE )
{
nwipe_options.noblank = 0;
}
return;
case KEY_BACKSPACE:
case KEY_BREAK:
return;
} /* switch */
} while( terminate_signal != 1 );
} /* nwipe_gui_verify */
void nwipe_gui_noblank( void )
{
/**
* Allows the user to change the verification option.
*
* @modifies nwipe_options.noblank
* @modifies main_window
*
*/
extern int terminate_signal;
/* The number of options available. */
const int count = 2;
/* The first tabstop. */
const int tab1 = 2;
/* The second tabstop. */
const int tab2 = 40;
/* Set the initial focus. */
int focus = nwipe_options.noblank;
/* The current working row. */
int yy;
/* Input buffer. */
int keystroke;
/* Update the footer window. */
werase( footer_window );
nwipe_gui_title( footer_window, selection_footer );
wrefresh( footer_window );
do
{
nwipe_gui_create_all_windows_on_terminal_resize( selection_footer );
/* Clear the main window. */
werase( main_window );
/* Initialize the working row. */
yy = 2;
/* Print the options. */
mvwprintw( main_window, yy++, tab1, " Perform a final blanking pass " );
mvwprintw( main_window, yy++, tab1, " Do not perform final blanking pass " );
mvwprintw( main_window, yy++, tab1, " " );
/* Print the cursor. */
mvwaddch( main_window, 2 + focus, tab1, ACS_RARROW );
switch( focus )
{
case 0:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe\"" );
mvwprintw( main_window,
yy++,
tab1,
"Perform a final blanking pass after the wipe, leaving disk with only zeros. " );
mvwprintw( main_window,
yy++,
tab1,
"Note that the RCMP TSSIT OPS-II method never blanks the device regardless " );
mvwprintw( main_window,
yy++,
tab1,
"of this setting. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
break;
case 1:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --noblank\"" );
mvwprintw( main_window,
yy++,
tab1,
"Do not perform a final blanking pass. Leave data as per final wiping pass. " );
mvwprintw( main_window,
yy++,
tab1,
"Note that the RCMP TSSIT OPS-II method never blanks the device regardless " );
mvwprintw( main_window,
yy++,
tab1,
"of this setting. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
break;
} /* switch */
/* Add a border. */
box( main_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( main_window, " Final Blanking Pass " );
/* Refresh the window. */
wrefresh( main_window );
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
timeout( 250 ); // block getch() for 250ms.
keystroke = getch(); // Get a keystroke.
timeout( -1 ); // Switch back to blocking mode.
switch( keystroke )
{
case KEY_DOWN:
case 'j':
case 'J':
if( focus < count - 1 )
{
focus += 1;
}
break;
case KEY_UP:
case 'k':
case 'K':
if( focus > 0 )
{
focus -= 1;
}
break;
case KEY_ENTER:
case ' ':
case 10:
if( focus >= 0 && focus < count )
{
nwipe_options.noblank = focus;
}
if( nwipe_options.noblank )
{
nwipe_options.verify = NWIPE_VERIFY_NONE;
}
return;
case KEY_BACKSPACE:
case KEY_BREAK:
return;
} /* switch */
}
while( terminate_signal != 1 );
} /* nwipe_gui_noblank */
void nwipe_gui_method( void )
{
/**
* Allows the user to change the wipe method.
*
* @modifies nwipe_options.method
* @modifies main_window
*
*/
extern int terminate_signal;
/* The number of implemented methods. */
const int count = 8;
/* The first tabstop. */
const int tab1 = 2;
/* The second tabstop. */
const int tab2 = 30;
/* The currently selected method. */
int focus = 0;
/* The current working row. */
int yy;
/* Input buffer. */
int keystroke;
/* Update the footer window. */
werase( footer_window );
nwipe_gui_title( footer_window, selection_footer );
wrefresh( footer_window );
if( nwipe_options.method == &nwipe_zero )
{
focus = 0;
}
if( nwipe_options.method == &nwipe_ops2 )
{
focus = 1;
}
if( nwipe_options.method == &nwipe_dodshort )
{
focus = 2;
}
if( nwipe_options.method == &nwipe_dod522022m )
{
focus = 3;
}
if( nwipe_options.method == &nwipe_gutmann )
{
focus = 4;
}
if( nwipe_options.method == &nwipe_random )
{
focus = 5;
}
if( nwipe_options.method == &nwipe_verify )
{
focus = 6;
}
if( nwipe_options.method == &nwipe_is5enh )
{
focus = 7;
}
do
{
/* Clear the main window. */
werase( main_window );
nwipe_gui_create_all_windows_on_terminal_resize( selection_footer );
/* Initialize the working row. */
yy = 2;
/* Print the options. */
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_zero ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_ops2 ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_dodshort ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_dod522022m ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_gutmann ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_random ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_verify ) );
mvwprintw( main_window, yy++, tab1, " %s", nwipe_method_label( &nwipe_is5enh ) );
mvwprintw( main_window, yy++, tab1, " " );
/* Print the cursor. */
mvwaddch( main_window, 2 + focus, tab1, ACS_RARROW );
switch( focus )
{
case 0:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method zero\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Low (1 pass)" );
mvwprintw( main_window,
yy++,
tab1,
"This method fills the device with zeros. Note that the rounds option does " );
mvwprintw( main_window,
yy++,
tab1,
"not apply to this method. This method always runs one round. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"Use this method to blank disks before internal redeployment, or before " );
mvwprintw( main_window,
yy++,
tab1,
"reinstalling Microsoft Windows to remove the data areas that the format " );
mvwprintw(
main_window, yy++, tab1, "utility preserves. " );
break;
case 1:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method ops2\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Medium (8 passes)" );
mvwprintw( main_window,
yy++,
tab1,
"The Royal Canadian Mounted Police Technical Security Standard for " );
mvwprintw( main_window,
yy++,
tab1,
"Information Technology, Appendix OPS-II: Media Sanitization. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"This implementation, with regards to paragraph 2 section A of the standard, " );
mvwprintw( main_window,
yy++,
tab1,
"uses a pattern that is one random byte and that is changed each round. " );
break;
case 2:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method dodshort\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Medium (3 passes)" );
mvwprintw( main_window,
yy++,
tab1,
"The American Department of Defense 5220.22-M short wipe. " );
mvwprintw( main_window,
yy++,
tab1,
"This method is composed of passes 1, 2 & 7 from the standard wipe. " );
break;
case 3:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method dod522022m\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Medium (7 passes)" );
mvwprintw( main_window,
yy++,
tab1,
"The American Department of Defense 5220.22-M standard wipe. " );
mvwprintw( main_window,
yy++,
tab1,
"This implementation uses the same algorithm as the Heidi Eraser product. " );
break;
case 4:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method gutmann\"" );
mvwprintw( main_window, 3, tab2, "Security Level: High (35 passes)" );
mvwprintw( main_window,
yy++,
tab1,
"This is the method described by Peter Gutmann in the paper entitled " );
mvwprintw( main_window,
yy++,
tab1,
"\"Secure Deletion of Data from Magnetic and Solid-State Memory\". " );
break;
case 5:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method random\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Depends on Rounds" );
mvwprintw( main_window,
yy++,
tab1,
"This method fills the device with a stream from the PRNG. It is probably the " );
mvwprintw( main_window,
yy++,
tab1,
"best method to use on modern hard disk drives because encoding schemes vary. " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"This method has a medium security level with 4 rounds, and a high security " );
mvwprintw( main_window,
yy++,
tab1,
"level with 8 rounds. " );
break;
case 6:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method verify\"" );
mvwprintw( main_window, 3, tab2, "Security Level: None" );
mvwprintw( main_window,
yy++,
tab1,
"This method only reads the device and checks that it is all zero. " );
break;
case 7:
mvwprintw( main_window, 2, tab2, "syslinux.cfg: nuke=\"nwipe --method is5enh\"" );
mvwprintw( main_window, 3, tab2, "Security Level: Medium (3 passes)" );
mvwprintw( main_window,
yy++,
tab1,
"HMG IA/IS 5 (Infosec Standard 5): Secure Sanitisation of Protectively Marked " );
mvwprintw( main_window,
yy++,
tab1,
"Information or Sensitive Information " );
mvwprintw( main_window,
yy++,
tab1,
" " );
mvwprintw( main_window,
yy++,
tab1,
"This method fills the device with 0s, then with 1s, then with a PRNG stream, " );
mvwprintw( main_window,
yy++,
tab1,
"then reads the device to verify the PRNG stream was successfully written. " );
break;
} /* switch */
/* Add a border. */
box( main_window, 0, 0 );
/* Add a title. */
nwipe_gui_title( main_window, " Wipe Method " );
/* Refresh the window. */
wrefresh( main_window );
/* Wait 250ms for input from getch, if nothing getch will then continue,
* This is necessary so that the while loop can be exited by the
* terminate_signal e.g.. the user pressing control-c to exit.
* Do not change this value, a higher value means the keys become
* sluggish, any slower and more time is spent unnecessarily looping
* which wastes CPU cycles.
*/
timeout( 250 ); /* block getch() for 250ms */
keystroke = getch(); /* Get a keystroke. */
timeout( -1 ); /* Switch back to blocking mode */
switch( keystroke )
{
case KEY_DOWN:
case 'j':
case 'J':
if( focus < count - 1 )
{
focus += 1;
}
break;
case KEY_UP:
case 'k':
case 'K':
if( focus > 0 )
{
focus -= 1;
}
break;
case KEY_BACKSPACE:
case KEY_BREAK:
return;
} /* switch */
} while( keystroke != KEY_ENTER && keystroke != ' ' && keystroke != 10 && terminate_signal != 1 );
switch( focus )
{
case 0:
nwipe_options.method = &nwipe_zero;
break;
case 1:
nwipe_options.method = &nwipe_ops2;
break;
case 2:
nwipe_options.method = &nwipe_dodshort;
break;
case 3:
nwipe_options.method = &nwipe_dod522022m;
break;
case 4:
nwipe_options.method = &nwipe_gutmann;
break;
case 5:
nwipe_options.method = &nwipe_random;
break;
case 6:
nwipe_options.method = &nwipe_verify;
break;
case 7:
nwipe_options.method = &nwipe_is5enh;
break;
}
} /* nwipe_gui_method */
void nwipe_gui_load( void )
{
/**
* Prints the system load average to the statistics window.
*
* @modifies stat_window Prints the system load average to the statistics window.
*
*/
/* A file handle for the stat file. */
FILE* nwipe_fp;
/* The one, five, and fifteen minute load averages. */
float load_01;
float load_05;
float load_15;
/* Open the loadavg file. */
nwipe_fp = fopen( NWIPE_KNOB_LOADAVG, "r" );
/* Print the label. */
mvwprintw( stats_window, NWIPE_GUI_STATS_LOAD_Y, NWIPE_GUI_STATS_LOAD_X, "Load Averages:" );
if( nwipe_fp )
{
/* The load averages are the first three numbers in the file. */
if( 3 == fscanf( nwipe_fp, "%f %f %f", &load_01, &load_05, &load_15 ) )
{
/* Print the load average. */
mvwprintw( stats_window,
NWIPE_GUI_STATS_LOAD_Y,
NWIPE_GUI_STATS_TAB,
"%04.2f %04.2f %04.2f",
load_01,
load_05,
load_15 );
}
else
{
/* Print an error. */
mvwprintw( stats_window, NWIPE_GUI_STATS_LOAD_Y, NWIPE_GUI_STATS_TAB, "(fscanf error %i)", errno );
}
/* Close the loadavg file. */
fclose( nwipe_fp );
}
else
{
mvwprintw( stats_window, NWIPE_GUI_STATS_LOAD_Y, NWIPE_GUI_STATS_TAB, "(fopen error %i)", errno );
}
} /* nwipe_gui_load */
void* nwipe_gui_status( void* ptr )
{
/**
* Shows runtime statistics and overall progress.
*
* @parameter count The number of contexts in the array.
* @parameter c An array of device contexts.
*
* @modifies main_window Prints information into the main window.
* @modifies c[].throughput Updates the i/o throughput value.
*
*/
extern int terminate_signal;
nwipe_thread_data_ptr_t* nwipe_thread_data_ptr;
nwipe_thread_data_ptr = (nwipe_thread_data_ptr_t*) ptr;
nwipe_context_t** c;
nwipe_misc_thread_data_t* nwipe_misc_thread_data;
int count;
c = nwipe_thread_data_ptr->c;
nwipe_misc_thread_data = nwipe_thread_data_ptr->nwipe_misc_thread_data;
count = nwipe_misc_thread_data->nwipe_selected;
char nomenclature_result_str[NOMENCLATURE_RESULT_STR_SIZE]; /* temporary usage */
/* Spinner character */
char spinner_string[2];
/* We count time from when this function is first called. */
static time_t nwipe_time_start = 0;
/* Whether the screen has been blanked by the user. */
static int nwipe_gui_blank = 0;
/* The current time. */
time_t nwipe_time_now;
/* The time when all wipes ended */
time_t nwipe_time_stopped;
/* The index of the element that is visible in the first slot. */
static int offset;
/* The number of elements that we can show in the window. */
int slots;
/* Window dimensions. */
int wlines;
int wcols;
/* Generic loop variable. */
int i;
/* The current working line in the main window. */
int yy;
/* User input buffer. */
int keystroke;
/* controls main while loop */
int loop_control;
/* The combined througput of all processes. */
nwipe_misc_thread_data->throughput = 0;
/* The estimated runtime of the slowest device. */
nwipe_misc_thread_data->maxeta = 0;
/* The combined number of errors of all processes. */
nwipe_misc_thread_data->errors = 0;
/* Time values. */
int nwipe_hh;
int nwipe_mm;
int nwipe_ss;
struct timespec tim, tim2;
tim.tv_sec = 0;
tim.tv_nsec = 100000000L; /* sleep for 0.1 seconds */
/* Throughput variables */
u64 nwipe_throughput;
/* The number of active wipe processes. */
/* Set to 1 initially to start loop. */
int nwipe_active = 1;
if( nwipe_time_start == 0 )
{
/* This is the first time that we have been called. */
nwipe_time_start = time( NULL ) - 1;
}
nwipe_gui_title( footer_window, end_wipe_footer );
loop_control = 1;
while( loop_control )
{
/* IMPORTANT ! Halfdelay(1) causes getch() to pause for 0.1 secs. This is important for two reasons.
* 1. Pauses the getch for 0.1 secs so that the screen is only updated max 10 times/sec. Without
* this delay the loop would run hundreds of times per sec maxing out the core.
* 2. By keeping the delay below 0.2 seconds, i.e 0.1, it makes the keypress and resizing
* nice and responsive.
*/
halfdelay( 1 ); // Important, don't change this unless you know what you are doing ! Related to getch().
keystroke = getch(); // Get user input.
/* Get the current time. */
if( nwipe_active && terminate_signal != 1 )
{
nwipe_time_now = time( NULL );
nwipe_time_stopped = nwipe_time_now;
}
else
{
nwipe_time_now = nwipe_time_stopped;
}
/* Erase the main window. */
werase( main_window );
/* Erase the stats window. */
werase( stats_window );
/* Erase the footer window */
werase( footer_window );
/* Only repaint the windows on terminal resize if the user hasn't blanked the screen */
if( nwipe_gui_blank == 0 )
{
if( nwipe_active != 0 )
{
/* if resizing the terminal during a wipe a specific footer is required */
nwipe_gui_create_all_windows_on_terminal_resize( end_wipe_footer );
}
else
{
/* and if the wipes have finished a different footer is required */
nwipe_gui_create_all_windows_on_terminal_resize( wipes_finished_footer );
}
}
/* Initialize our working offset to the third line. */
yy = 2;
/* Get the window dimensions. */
getmaxyx( main_window, wlines, wcols );
/* Less four lines for the box and padding. */
slots = wlines - 4;
/* Each element prints three lines. */
slots /= 3;
if( nwipe_active == 0 || terminate_signal == 1 )
{
nwipe_gui_title( footer_window, wipes_finished_footer );
// Refresh the footer_window ;
wnoutrefresh( footer_window );
}
if( terminate_signal == 1 )
{
loop_control = 0;
}
if( keystroke > 0x0a && keystroke < 0x7e && nwipe_gui_blank == 1 )
{
/* Show screen */
nwipe_gui_blank = 0;
/* Set background */
wbkgdset( stdscr, COLOR_PAIR( 1 ) );
wclear( stdscr );
/* Unhide panels */
show_panel( header_panel );
show_panel( footer_panel );
show_panel( stats_panel );
show_panel( options_panel );
show_panel( main_panel );
/* reprint the footer */
nwipe_gui_title( footer_window, end_wipe_footer );
// Refresh the footer_window ;
wnoutrefresh( footer_window );
/* Update panels */
update_panels();
doupdate();
}
else if( keystroke > 0 )
{
switch( keystroke )
{
case 'b':
case 'B':
/* Blank screen. */
nwipe_gui_blank = 1;
hide_panel( header_panel );
hide_panel( footer_panel );
hide_panel( stats_panel );
hide_panel( options_panel );
hide_panel( main_panel );
/* Set the background style. */
wbkgdset( stdscr, COLOR_PAIR( 7 ) );
wclear( stdscr );
break;
case KEY_DOWN:
case 'j':
case 'J':
/* Scroll down. */
offset += 1;
if( count < slots )
{
offset = 0;
}
else if( offset + slots > count )
{
offset = count - slots;
}
break;
case KEY_UP:
case 'k':
case 'K':
/* Scroll up. */
offset -= 1;
if( offset < 0 )
{
offset = 0;
}
break;
case ' ':
case 0x0a:
/* Check whether we have finished all wipes, if yes exit while loop if user pressed spacebar or
* return. */
if( !nwipe_active || terminate_signal == 1 )
{
loop_control = 0;
}
break;
default:
/* Do nothing. */
break;
}
} /* keystroke */
/* if wipe has completed and user has specified auto poweroff or nowait then we can skip waiting for the user to
* press return */
if( !nwipe_active )
{
if( nwipe_options.autopoweroff || nwipe_options.nowait )
{
loop_control = 0;
}
}
/* Update screen if not blanked. */
if( nwipe_gui_blank == 0 )
{
if( terminate_signal != 1 )
{
nwipe_active = compute_stats( ptr ); // Returns number of active wipe threads
}
/* Print information for the user. */
for( i = offset; i < offset + slots && i < count; i++ )
{
/* Print the device label. */
mvwprintw( main_window, yy++, 2, "%s", c[i]->device_label );
/* Check whether the child process is still running the wipe. */
if( c[i]->wipe_status == 1 )
{
/* Print percentage and pass information. */
mvwprintw( main_window,
yy++,
4,
"[%5.2f%%, round %i of %i, pass %i of %i] ",
c[i]->round_percent,
c[i]->round_working,
c[i]->round_count,
c[i]->pass_working,
c[i]->pass_count );
} /* child running */
else
{
if( c[i]->result == 0 )
{
mvwprintw( main_window, yy++, 4, "[%05.2f%% complete, SUCCESS! ", c[i]->round_percent );
}
else if( c[i]->signal )
{
wattron( main_window, COLOR_PAIR( 9 ) );
mvwprintw( main_window, yy++, 4, "(>>> FAILURE! <<<, signal %i) ", c[i]->signal );
wattroff( main_window, COLOR_PAIR( 9 ) );
}
else
{
wattron( main_window, COLOR_PAIR( 9 ) );
mvwprintw( main_window, yy++, 4, "(>>>FAILURE!<<<, code %i) ", c[i]->result );
wattroff( main_window, COLOR_PAIR( 9 ) );
}
} /* child returned */
if( c[i]->verify_errors )
{
wprintw( main_window, "[verify errors: %llu] ", c[i]->verify_errors );
}
if( c[i]->pass_errors )
{
wprintw( main_window, "[pass errors: %llu] ", c[i]->pass_errors );
}
if( c[i]->wipe_status == 1 )
{
switch( c[i]->pass_type )
{
/* Each text field in square brackets should be the same number of characters
* to retain output in columns */
case NWIPE_PASS_FINAL_BLANK:
if( !c[i]->sync_status )
{
wprintw( main_window, "[ blanking] " );
}
break;
case NWIPE_PASS_FINAL_OPS2:
if( !c[i]->sync_status )
{
wprintw( main_window, "[OPS2final] " );
}
break;
case NWIPE_PASS_WRITE:
if( !c[i]->sync_status )
{
wprintw( main_window, "[ writing ] " );
}
break;
case NWIPE_PASS_VERIFY:
if( !c[i]->sync_status )
{
wprintw( main_window, "[verifying] " );
}
break;
case NWIPE_PASS_NONE:
break;
}
if( c[i]->sync_status )
{
wprintw( main_window, "[ syncing ] " );
}
}
/* Determine throughput nomenclature for this drive and output drives throughput to GUI */
Determine_C_B_nomenclature( c[i]->throughput, nomenclature_result_str, NOMENCLATURE_RESULT_STR_SIZE );
wprintw( main_window, "[%s/s] ", nomenclature_result_str );
/* Insert whitespace. */
yy += 1;
/* Increment the next spinner character for this context if the thread is active */
if( c[i]->wipe_status == 1 )
{
spinner( c, i );
spinner_string[0] = c[i]->spinner_character[0];
}
else
{
/* if the wipe thread is no longer active, replace the spinner with a space */
spinner_string[0] = ' ';
}
spinner_string[1] = 0;
wprintw( main_window, " %s ", spinner_string );
}
if( offset > 0 )
{
mvwprintw( main_window, 1, wcols - 8, " More " );
waddch( main_window, ACS_UARROW );
}
if( count - offset > slots )
{
mvwprintw( main_window, wlines - 2, wcols - 8, " More " );
waddch( main_window, ACS_DARROW );
}
/* Box the main window. */
box( main_window, 0, 0 );
/* Refresh the main window. */
wnoutrefresh( main_window );
/* Update the load average field, but only if we are still wiping */
if( nwipe_active && terminate_signal != 1 )
{
nwipe_gui_load();
}
nwipe_throughput = nwipe_misc_thread_data->throughput;
/* Determine the nomenclature for the combined throughput */
Determine_C_B_nomenclature( nwipe_throughput, nomenclature_result_str, NOMENCLATURE_RESULT_STR_SIZE );
/* Print the combined throughput. */
mvwprintw( stats_window, NWIPE_GUI_STATS_THROUGHPUT_Y, NWIPE_GUI_STATS_THROUGHPUT_X, "Throughput:" );
mvwprintw(
stats_window, NWIPE_GUI_STATS_THROUGHPUT_Y, NWIPE_GUI_STATS_TAB, "%s/s", nomenclature_result_str );
/* Change the current time into a delta. */
nwipe_time_now -= nwipe_time_start;
/* Put the delta into HH:mm:ss form. */
nwipe_hh = nwipe_time_now / 3600;
nwipe_time_now %= 3600;
nwipe_mm = nwipe_time_now / 60;
nwipe_time_now %= 60;
nwipe_ss = nwipe_time_now;
/* Print the runtime. */
mvwprintw( stats_window, NWIPE_GUI_STATS_RUNTIME_Y, 1, "Runtime:" );
mvwprintw( stats_window,
NWIPE_GUI_STATS_RUNTIME_Y,
NWIPE_GUI_STATS_TAB,
"%02i:%02i:%02i",
nwipe_hh,
nwipe_mm,
nwipe_ss );
mvwprintw( stats_window, NWIPE_GUI_STATS_ETA_Y, 1, "Remaining:" );
time_t nwipe_maxeta = nwipe_misc_thread_data->maxeta;
if( nwipe_maxeta > 0 )
{
/* Do it again for the estimated runtime remaining. */
nwipe_hh = nwipe_maxeta / 3600;
nwipe_maxeta %= 3600;
nwipe_mm = nwipe_maxeta / 60;
nwipe_maxeta %= 60;
nwipe_ss = nwipe_maxeta;
/* Print the estimated runtime remaining. */
mvwprintw( stats_window,
NWIPE_GUI_STATS_ETA_Y,
NWIPE_GUI_STATS_TAB,
"%02i:%02i:%02i",
nwipe_hh,
nwipe_mm,
nwipe_ss );
}
/* Print the error count. */
mvwprintw( stats_window, NWIPE_GUI_STATS_ERRORS_Y, NWIPE_GUI_STATS_ERRORS_X, "Errors:" );
mvwprintw(
stats_window, NWIPE_GUI_STATS_ERRORS_Y, NWIPE_GUI_STATS_TAB, " %llu", nwipe_misc_thread_data->errors );
/* Add a border. */
box( stats_window, 0, 0 );
/* Add a title. */
mvwprintw( stats_window, 0, ( NWIPE_GUI_STATS_W - strlen( stats_title ) ) / 2, "%s", stats_title );
/* Refresh internal representation of stats window */
wnoutrefresh( stats_window );
/* Output all windows to screen */
doupdate();
} // end blank screen if
} /* End of while loop */
if( nwipe_options.logfile[0] == '\0' )
{
nwipe_gui_title( footer_window, wipes_finished_footer );
}
else
{
char finish_message[NWIPE_GUI_FOOTER_W];
snprintf( finish_message,
sizeof( finish_message ),
"Wipe finished - press enter to exit. Logged to %s",
nwipe_options.logfile );
nwipe_gui_title( footer_window, finish_message );
}
terminate_signal = 1;
return NULL;
} /* nwipe_gui_status */
int compute_stats( void* ptr )
{
nwipe_thread_data_ptr_t* nwipe_thread_data_ptr;
nwipe_thread_data_ptr = (nwipe_thread_data_ptr_t*) ptr;
nwipe_context_t** c;
nwipe_misc_thread_data_t* nwipe_misc_thread_data;
c = nwipe_thread_data_ptr->c;
nwipe_misc_thread_data = nwipe_thread_data_ptr->nwipe_misc_thread_data;
int count = nwipe_misc_thread_data->nwipe_selected;
int nwipe_active = 0;
int i;
time_t nwipe_time_now = time( NULL );
nwipe_misc_thread_data->throughput = 0;
nwipe_misc_thread_data->maxeta = 0;
nwipe_misc_thread_data->errors = 0;
/* Enumerate all contexts to compute statistics. */
for( i = 0; i < count; i++ )
{
/* Check whether the child process is still running the wipe. */
if( c[i]->wipe_status == 1 )
{
/* Increment the child counter. */
nwipe_active += 1;
/* Even if the wipe has finished ALWAYS run the stats one last time so the final SUCCESS percentage value is
* correct. Maintain a rolling average of throughput. */
nwipe_update_speedring( &c[i]->speedring, c[i]->round_done, nwipe_time_now );
if( c[i]->speedring.timestotal > 0 && c[i]->wipe_status == 1 )
{
/* Update the current average throughput in bytes-per-second. */
c[i]->throughput = c[i]->speedring.bytestotal / c[i]->speedring.timestotal;
/* Update the estimated remaining runtime. */
/* Check that throughput is not zero (sometimes caused during a sync) */
if( c[i]->throughput == 0 )
{
c[i]->throughput = 1;
}
c[i]->eta = ( c[i]->round_size - c[i]->round_done ) / c[i]->throughput;
if( c[i]->eta > nwipe_misc_thread_data->maxeta )
{
nwipe_misc_thread_data->maxeta = c[i]->eta;
}
}
/* Calculate the average throughput */
c[i]->throughput = (double) c[i]->round_done / (double) difftime( nwipe_time_now, c[i]->start_time );
}
/* Update the percentage value. */
c[i]->round_percent = (double) c[i]->round_done / (double) c[i]->round_size * 100;
if( c[i]->wipe_status == 1 )
{
/* Accumulate combined throughput. */
nwipe_misc_thread_data->throughput += c[i]->throughput;
}
/* Accumulate the error count. */
nwipe_misc_thread_data->errors += c[i]->pass_errors;
nwipe_misc_thread_data->errors += c[i]->verify_errors;
} /* for statistics */
return nwipe_active;
}
void nwipe_update_speedring( nwipe_speedring_t* speedring, u64 speedring_bytes, time_t speedring_now )
{
if( speedring->timeslast == 0 )
{
/* Ignore the first sample and initialize. */
speedring->timeslast = speedring_now;
return;
}
if( speedring_now - speedring->timeslast < NWIPE_KNOB_SPEEDRING_GRANULARITY )
{
/* Avoid jitter caused by frequent updates. */
return;
}
/* Subtract the oldest speed sample from the accumulator. */
speedring->bytestotal -= speedring->bytes[speedring->position];
speedring->timestotal -= speedring->times[speedring->position];
/* Put the lastest bytes-per-second sample into the ring buffer. */
speedring->bytes[speedring->position] = speedring_bytes - speedring->byteslast;
speedring->times[speedring->position] = speedring_now - speedring->timeslast;
/* Add the newest speed sample to the accumulator. */
speedring->bytestotal += speedring->bytes[speedring->position];
speedring->timestotal += speedring->times[speedring->position];
/* Remember the last sample. */
speedring->byteslast = speedring_bytes;
speedring->timeslast = speedring_now;
if( ++speedring->position >= NWIPE_KNOB_SPEEDRING_SIZE )
{
speedring->position = 0;
}
}
int spinner( nwipe_context_t** ptr, int device_idx )
{
nwipe_context_t** c;
c = ptr;
/* The spinner characters |/-\|/-\ */
char sc[9] = "|/-\\|/-\\/";
/* check sanity of index */
if( c[device_idx]->spinner_idx < 0 || c[device_idx]->spinner_idx > 7 )
{
return 1;
}
c[device_idx]->spinner_character[0] = sc[c[device_idx]->spinner_idx];
c[device_idx]->spinner_idx++;
if( c[device_idx]->spinner_idx > 7 )
{
c[device_idx]->spinner_idx = 0;
}
return 0;
}
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