/*-
* Copyright (C) 2005-2007 Nick Withers. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <gtk/gtk.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <time.h>
#include <unistd.h>

#ifndef BSD /* sysexits.h only exists on BSD systems (as far as I know), so define exit codes for other platforms */
#define	EX_USAGE	EXIT_FAILURE
#define	EX_DATAERR	EXIT_FAILURE
#define	EX_NOINPUT	EXIT_FAILURE
#define	EX_NOUSER	EXIT_FAILURE
#define	EX_NOHOST	EXIT_FAILURE
#define	EX_UNAVAILABLE	EXIT_FAILURE
#define	EX_SOFTWARE	EXIT_FAILURE
#define	EX_OSERR	EXIT_FAILURE
#define	EX_OSFILE	EXIT_FAILURE
#define	EX_CANTCREAT	EXIT_FAILURE
#define	EX_IOERR	EXIT_FAILURE
#define	EX_TEMPFAIL	EXIT_FAILURE
#define	EX_PROTOCOL	EXIT_FAILURE
#define	EX_NOPERM	EXIT_FAILURE
#define	EX_CONFIG	EXIT_FAILURE
#endif

#ifndef EFTYPE
#define	EFTYPE	EINVAL /* EFTYPE ("Inappropriate file type or format") doesn't necessarily exist, so if it doesn't, #define it to be EINVAL ("Invalid argument") */
#endif

#define	PRGNAME	"DownTime"
#define	VERSION	"0.3.1.1"
#define	COPYRIGHT	"Copyright (c) 2005-2007, Nick Withers. All rights reserved."
#define	LICENSE_SHORT	"BSD License"
#define	LICENSE_LONG	\
PRGNAME " is distributed under the following terms:\n"\
"\n"\
COPYRIGHT "\n"\
"\n"\
"Redistribution and use in source and binary forms, with or without\n"\
"modification, are permitted provided that the following conditions\n"\
"are met:\n"\
"1. Redistributions of source code must retain the above copyright\n"\
"   notice, this list of conditions and the following disclaimer.\n"\
"2. Redistributions in binary form must reproduce the above copyright\n"\
"   notice, this list of conditions and the following disclaimer in the\n"\
"   documentation and/or other materials provided with the distribution.\n"\
"\n"\
"THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND\n"\
"ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n"\
"IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n"\
"ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE\n"\
"FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\n"\
"DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\n"\
"OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\n"\
"HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\n"\
"LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"\
"OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"\
"SUCH DAMAGE."
#define	CONTACT_EMAIL	"downtime@nickwithers.com"
#define	CONTACT_WWW	"http://nickwithers.com/downtime"
#define	AUTHORS { \
	"Nick Withers (nick@nickwithers.com)", \
	(char *) NULL \
}

enum SHUTDOWN_TYPES {POWEROFF, RESTART, HALT, SINGLE_USER};
enum TIMEOUT_UNITS {MINUTES, HOURS, DAYS};

#ifndef TRUE
#define	TRUE	1
#endif

#ifndef FALSE
#define	FALSE	0
#endif

#define	DEFAULT_TIMEOUT	60
#define	DEFAULT_TIMEOUT_UNIT	MINUTES
#define	DEFAULT_SHUTDOWN_TYPE	POWEROFF
#define	DEFAULT_REMEMBER	TRUE
#define	SHUTDOWN_FILENAME	"shutdown"
#define	DEFAULT_SHUTDOWN_PATH	"/sbin/" SHUTDOWN_FILENAME

#ifndef WITH_NOFORK_SHUTDOWN_PARAMETER
#define	PID_OUTPUT_FILENO	STDERR_FILENO /* The file descriptor on which shutdown(8) outputs its PID */
#define	START_SHUTDOWN_PID_OUTPUT	SHUTDOWN_FILENAME ": [pid " /* In order for DownTime to be able to pick up shutdown(8)'s PID, the correct preceding text needs to be specified here. The number immediately following this text (whitespace is fine) will be taken to be the PID */
#endif

#define	DIR_SEPARATOR	'/'
#define	DIR_SEPARATOR_STRING	"/"
#define	PATH_SEPARATOR	':'
#define	CONFIG_FILE_NAME	".downtime"

typedef struct
{
	pid_t pid;
	unsigned long int timeout; /* Stores the timeout value for the shutdown in minutes */
	time_t start_time;
	time_t shutdown_time;
	unsigned int type : 3; /* This'll actually store an index of enum SHUTDOWN_TYPES, so doesn't need to occupy too much space! We've got 0 - 7 here */
	unsigned int in_progress : 1;
	unsigned int paused : 1;
} shutdown_t;

typedef struct
{
	char *config_path;

	unsigned long int timeout; /* This holds the timeout value as specified by the user. It must be used in conjunction with timeout_unit to get a value in minutes that can be stored in shutdown.timeout */
	unsigned int timeout_unit : 2; /* This'll actually store an index of enum SHUTDOWN_TYPES, so doesn't need to occupy too much space! We've got 0 - 3 here */
	unsigned int shutdown_type : 3; /* This'll actually store an index of enum SHUTDOWN_TYPES, so doesn't need to occupy too much space! We've got 0 - 7 here */
	unsigned int remember : 1;
	unsigned int advanced_main : 1;

	/* Preferences */
	unsigned int main_window_always_on_top : 1;
	unsigned int progress_window_always_on_top : 1;
} user_specs_t;

char add_to_unique_string_array(char ***string_array, size_t *array_length, char *string_to_add);
char add_to_string_array(char ***string_array, size_t *array_length, char *string_to_add);
char array_add(void **array, size_t *length, const void *add_me, size_t elem_size);
char cat_strchar(char **original_string, const char append_me);
char * cat_strings(const char *shutdown_string, const char *append_me);
char * find_executable_in_path(char *filename);
char * get_config_path(void);
char * get_filename_from_path(const char *path);
char * get_shutdown_time_left_string(shutdown_t *shutdown);
void init_user_specs(user_specs_t *specs);
char is_in_string_array(char **string_array, size_t array_length, char *string_to_add);
char load_user_specs(user_specs_t *specs, char *config_path);
long int max_minutes_to_shutdown(shutdown_t *shutdown);
int pasprintf(char **ret, const char *fmt, ...);
int pvasprintf(char **ret, const char *fmt, va_list ap);
void save_user_specs(user_specs_t *specs, char *config_path);
void show_error_dialog(int eval, const char *fmt, ...);
void show_main_window(user_specs_t *specs);
void show_stderr(const char *fmt, ...);
void show_warning_dialog(const char *fmt, ...);
shutdown_t * start_shutdown(user_specs_t *specs, shutdown_t *shutdown);
char * trim_white(const char *string);