/*
  **
  ** conf.c
  **
  ** I originally wrote conf.c as part of the drpoxy package
  ** thanks to Matthew Pratt and others for their additions.
  **
  ** Copyright 1999 Jeroen Vreeken (pe1rxq@chello.nl)
  **
  ** This software is licensed under the terms of the GNU General
  ** Public License (GPL). Please see the file COPYING for details.
  **
  **
*/

/**
 * How to add a config option :
 *
 *   1. think twice, there are settings enough
 *
 *   2. add a field to 'struct config' (conf.h) and 'struct config conf'
 *
 *   4. add a entry to the config_params array below, if your
 *      option should be configurable by the config file.
 */
#include "motion.h"


#if (defined(BSD))
#include "video_freebsd.h"
#else
#include "video.h"
#endif /* BSD */

#ifndef HAVE_GET_CURRENT_DIR_NAME
char *get_current_dir_name(void)
{
    char *buf = malloc(MAXPATHLEN);
    getwd(buf);
    return buf;
}
#endif


#define stripnewline(x) {if ((x)[strlen(x)-1]=='\n') (x)[strlen(x) - 1] = 0;}


struct config conf_template = {
    width:                      DEF_WIDTH,
    height:                     DEF_HEIGHT,
    quality:                    DEF_QUALITY,
    rotate_deg:                 0,
    max_changes:                DEF_CHANGES,
    threshold_tune:             0,
    output_normal:              "on",
    motion_img:                 0,
    output_all:                 0,
    gap:                        DEF_GAP,
    maxmpegtime:                DEF_MAXMPEGTIME,
    snapshot_interval:          0,
    locate:                     "off",
    input:                      IN_DEFAULT,
    norm:                       0,
    frame_limit:                DEF_MAXFRAMERATE,
    quiet:                      1,
    ppm:                        0,
    noise:                      DEF_NOISELEVEL,
    noise_tune:                 1,
    minimum_frame_time:         0,
    lightswitch:                0,
    autobright:                 0,
    brightness:                 0,
    contrast:                   0,
    saturation:                 0,
    hue:                        0,
    roundrobin_frames:          1,
    roundrobin_skip:            1,
    pre_capture:                0,
    post_capture:               0,
    switchfilter:               0,
    ffmpeg_cap_new:             0,
    ffmpeg_cap_motion:          0,
    ffmpeg_bps:                 DEF_FFMPEG_BPS,
    ffmpeg_vbr:                 DEF_FFMPEG_VBR,
    ffmpeg_video_codec:         DEF_FFMPEG_CODEC,
    webcam_port:                0,
    webcam_quality:             50,
    webcam_motion:              0,
    webcam_maxrate:             1,
    webcam_localhost:           1,
    webcam_limit:               0,
    control_port:               0,
    control_localhost:          1,
    control_html_output:        1,
    control_authentication:     NULL,
    frequency:                  0,
    tuner_number:               0,
    timelapse:                  0,
    timelapse_mode:             DEF_TIMELAPSE_MODE,
#if (defined(BSD))
    tuner_device:               NULL,
#endif
    video_device:               VIDEO_DEVICE,
    v4l2_palette:               8,        
    vidpipe:                    NULL,
    filepath:                   NULL,
    jpegpath:                   DEF_JPEGPATH,
    mpegpath:                   DEF_MPEGPATH,
    snappath:                   DEF_SNAPPATH,
    timepath:                   DEF_TIMEPATH,
    on_event_start:             NULL,
    on_event_end:               NULL,
    mask_file:                  NULL,
    smart_mask_speed:           0,
    sql_log_image:              1,
    sql_log_snapshot:           1,
    sql_log_mpeg:               0,
    sql_log_timelapse:          0,
    sql_query:                  DEF_SQL_QUERY,
    mysql_db:                   NULL,
    mysql_host:                 "localhost",
    mysql_user:                 NULL,
    mysql_password:             NULL,
    on_picture_save:            NULL,
    on_motion_detected:         NULL,
    on_area_detected:           NULL,
    on_movie_start:             NULL,
    on_movie_end:               NULL,
    on_camera_lost:             NULL,
    motionvidpipe:              NULL,
    netcam_url:                 NULL,
    netcam_userpass:            NULL,
    netcam_http:                "1.0",    /* Choices: 1.0, 1.1, or keep_alive */
    netcam_proxy:               NULL,
    netcam_tolerant_check:      0,
    pgsql_db:                   NULL,
    pgsql_host:                 "localhost",
    pgsql_user:                 NULL,
    pgsql_password:             NULL,
    pgsql_port:                 5432,
    text_changes:               0,
    text_left:                  NULL,
    text_right:                 DEF_TIMESTAMP,
    text_event:                 DEF_EVENTSTAMP,
    text_double:                0,
    despeckle:                  NULL,
    area_detect:                NULL,
    minimum_motion_frames:      1,
    pid_file:                   NULL,
};



static struct context ** copy_bool(struct context **, const char *, int);
static struct context ** copy_int(struct context **, const char *, int);
static struct context ** copy_short(struct context **, const char *, int);
static struct context ** config_thread(struct context **cnt, const char *str, int val);

static const char * print_bool(struct context **, char **, int, unsigned short int);
static const char * print_int(struct context **, char **, int, unsigned short int);
static const char * print_short(struct context **, char **, int, unsigned short int);
static const char * print_string(struct context **, char **, int, unsigned short int);
static const char * print_thread(struct context **, char **, int, unsigned short int);

static void usage(void);

/* Pointer magic to determine relative addresses of variables to a
   struct context pointer */
#define CNT_OFFSET(varname) ((long)&((struct context *)NULL)->varname)
#define CONF_OFFSET(varname) ((long)&((struct context *)NULL)->conf.varname) 
#define TRACK_OFFSET(varname) ((long)&((struct context *)NULL)->track.varname) 

config_param config_params[] = {
    {
    "daemon",
    "############################################################\n"
    "# Daemon\n"
    "############################################################\n\n"
    "# Start in daemon (background) mode and release terminal (default: off)",
    1,
    CNT_OFFSET(daemon),
    copy_bool,
    print_bool
    },
    {
    "process_id_file",
    "#File to store the process ID, also called pid file. (default: not defined)",
    1,
    CONF_OFFSET(pid_file),
    copy_string,
    print_string
    },
    {
    "setup_mode",
    "############################################################\n"
    "# Basic Setup Mode\n"
    "############################################################\n\n"
    "# Start in Setup-Mode, daemon disabled. (default: off)",
    0,
    CONF_OFFSET(setup_mode),
    copy_bool,
    print_bool
    },
    {
    "videodevice",
    "\n###########################################################\n"
    "# Capture device options\n"
    "############################################################\n\n"
    "# Videodevice to be used for capturing  (default /dev/video0)\n"
    "# for FreeBSD default is /dev/bktr0",
    0,
    CONF_OFFSET(video_device),
    copy_string,
    print_string
    },
    {
    "v4l2_palette",
    "# v4l2_palette allows to choose preferable palette to be use by motion\n"
    "# to capture from those supported by your videodevice. (default: 8)\n"
    "# E.g. if your videodevice supports both V4L2_PIX_FMT_SBGGR8 and\n"
    "# V4L2_PIX_FMT_MJPEG then motion will by default use V4L2_PIX_FMT_MJPEG.\n"
    "# Setting v4l2_palette to 1 forces motion to use V4L2_PIX_FMT_SBGGR8\n"
    "# instead.\n"
    "#\n"
    "# Values :\n"
    "# V4L2_PIX_FMT_SN9C10X : 0  'S910'\n"
    "# V4L2_PIX_FMT_SBGGR8  : 1  'BA81'\n"
    "# V4L2_PIX_FMT_MJPEG   : 2  'MJPEG'\n"
    "# V4L2_PIX_FMT_JPEG    : 3  'JPEG'\n"
    "# V4L2_PIX_FMT_RGB24   : 4  'RGB3'\n"
    "# V4L2_PIX_FMT_UYVY    : 5  'UYVY'\n"
    "# V4L2_PIX_FMT_YUYV    : 6  'YUYV'\n"
    "# V4L2_PIX_FMT_YUV422P : 7  '422P'\n"
    "# V4L2_PIX_FMT_YUV420  : 8  'YU12'",
    0,
    CONF_OFFSET(v4l2_palette),
    copy_short,
    print_short
    },
#if (defined(BSD))
    {
    "tunerdevice",
    "# Tuner device to be used for capturing using tuner as source (default /dev/tuner0)\n"
    "# This is ONLY used for FreeBSD. Leave it commented out for Linux",
    0,
    CONF_OFFSET(tuner_device),
    copy_string,
    print_string
    },
#endif
    {
    "input",
    "# The video input to be used (default: 8)\n"
    "# Should normally be set to 0 or 1 for video/TV cards, and 8 for USB cameras",
    0,
    CONF_OFFSET(input),
    copy_int,
    print_int
    },
    {
    "norm",
    "# The video norm to use (only for video capture and TV tuner cards)\n"
    "# Values: 0 (PAL), 1 (NTSC), 2 (SECAM), 3 (PAL NC no colour). Default: 0 (PAL)",
    0,
    CONF_OFFSET(norm),
    copy_int,
    print_int
    },
    {
    "frequency",
    "# The frequency to set the tuner to (kHz) (only for TV tuner cards) (default: 0)",
    0,
    CONF_OFFSET(frequency),
    copy_int,
    print_int
    },
    {
    "rotate",
    "# Rotate image this number of degrees. The rotation affects all saved images as\n"
    "# well as mpeg movies. Valid values: 0 (default = no rotation), 90, 180 and 270.",
    0,
    CONF_OFFSET(rotate_deg),
    copy_int,
    print_int
    },
    {
    "width",
    "# Image width (pixels). Valid range: Camera dependent, default: 352",
    0,
    CONF_OFFSET(width),
    copy_int,
    print_int
    },
    {
    "height",
    "# Image height (pixels). Valid range: Camera dependent, default: 288",
    0,
    CONF_OFFSET(height),
    copy_int,
    print_int
    },
    {
    "framerate",
    "# Maximum number of frames to be captured per second.\n"
    "# Valid range: 2-100. Default: 100 (almost no limit).",
    0,
    CONF_OFFSET(frame_limit),
    copy_int,
    print_int
    },
    {
    "minimum_frame_time",
    "# Minimum time in seconds between capturing picture frames from the camera.\n"
    "# Default: 0 = disabled - the capture rate is given by the camera framerate.\n"
    "# This option is used when you want to capture images at a rate lower than 2 per second.",
    0,
    CONF_OFFSET(minimum_frame_time),
    copy_int,
    print_int
    },
    {
    "netcam_url",
    "# URL to use if you are using a network camera, size will be autodetected (incl http:// ftp:// or file:///)\n"
    "# Must be a URL that returns single jpeg pictures or a raw mjpeg stream. Default: Not defined",
    0,
    CONF_OFFSET(netcam_url),
    copy_string,
    print_string
    },
    {
    "netcam_userpass",
    "# Username and password for network camera (only if required). Default: not defined\n"
    "# Syntax is user:password",
    0,
    CONF_OFFSET(netcam_userpass),
    copy_string,
    print_string
    },
    {
    "netcam_http",
    "# The setting for keep-alive of network socket, should improve performance on compatible net cameras.\n"
    "# 1.0:         The historical implementation using HTTP/1.0, closing the socket after each http request.\n"
    "# keep_alive:  Use HTTP/1.0 requests with keep alive header to reuse the same connection.\n"
    "# 1.1:         Use HTTP/1.1 requests that support keep alive as default.\n"
    "# Default: 1.0",
    0,
    CONF_OFFSET(netcam_http),
    copy_string,
    print_string
    },
    {
    "netcam_proxy",
    "# URL to use for a netcam proxy server, if required, e.g. \"http://myproxy\".\n"
    "# If a port number other than 80 is needed, use \"http://myproxy:1234\".\n"
    "# Default: not defined",
    0,
    CONF_OFFSET(netcam_proxy),
    copy_string,
    print_string
    },
    {
    "netcam_tolerant_check",
    "# Set less strict jpeg checks for network cameras with a poor/buggy firmware.\n"
    "# Default: off",    
    0,
    CONF_OFFSET(netcam_tolerant_check),
    copy_bool,
    print_bool    
    },
    {
    "auto_brightness",
    "# Let motion regulate the brightness of a video device (default: off).\n"
    "# The auto_brightness feature uses the brightness option as its target value.\n"
    "# If brightness is zero auto_brightness will adjust to average brightness value 128.\n"
    "# Only recommended for cameras without auto brightness",
    0,
    CONF_OFFSET(autobright),
    copy_bool,
    print_bool
    },
    {
    "brightness",
    "# Set the initial brightness of a video device.\n"
    "# If auto_brightness is enabled, this value defines the average brightness level\n"
    "# which Motion will try and adjust to.\n"
    "# Valid range 0-255, default 0 = disabled",
    0,
    CONF_OFFSET(brightness),
    copy_int,
    print_int
    },
    {
    "contrast",
    "# Set the contrast of a video device.\n"
    "# Valid range 0-255, default 0 = disabled",
    0,
    CONF_OFFSET(contrast),
    copy_int,
    print_int
    },
    {
    "saturation",
    "# Set the saturation of a video device.\n"
    "# Valid range 0-255, default 0 = disabled",
    0,
    CONF_OFFSET(saturation),
    copy_int,
    print_int
    },
    {
    "hue",
    "# Set the hue of a video device (NTSC feature).\n"
    "# Valid range 0-255, default 0 = disabled",
    0,
    CONF_OFFSET(hue),
    copy_int,
    print_int
    },
    {
    "roundrobin_frames",
    "\n############################################################\n"
    "# Round Robin (multiple inputs on same video device name)\n"
    "############################################################\n\n"
    "# Number of frames to capture in each roundrobin step (default: 1)",
    0,
    CONF_OFFSET(roundrobin_frames),
    copy_int,
    print_int
    },
    {
    "roundrobin_skip",
    "# Number of frames to skip before each roundrobin step (default: 1)",
    0,
    CONF_OFFSET(roundrobin_skip),
    copy_int,
    print_int
    },
    {
    "switchfilter",
    "# Try to filter out noise generated by roundrobin (default: off)",
    0,
    CONF_OFFSET(switchfilter),
    copy_bool,
    print_bool
    },
    {
    "threshold",
    "\n############################################################\n"
    "# Motion Detection Settings:\n"
    "############################################################\n\n"
    "# Threshold for number of changed pixels in an image that\n"
    "# triggers motion detection (default: 1500)",
    0,
    CONF_OFFSET(max_changes),
    copy_int,
    print_int
    },
    {
    "threshold_tune",
    "# Automatically tune the threshold down if possible (default: off)",
    0,
    CONF_OFFSET(threshold_tune),
    copy_bool,
    print_bool
    },
    {
    "noise_level",
    "# Noise threshold for the motion detection (default: 32)",
    0,
    CONF_OFFSET(noise),
    copy_int,
    print_int
    },
    {
    "noise_tune",
    "# Automatically tune the noise threshold (default: on)",
    0,
    CONF_OFFSET(noise_tune),
    copy_bool,
    print_bool
    },
    {
    "despeckle",
    "# Despeckle motion image using (e)rode or (d)ilate or (l)abel (Default: not defined)\n"
    "# Recommended value is EedDl. Any combination (and number of) of E, e, d, and D is valid.\n"
    "# (l)abeling must only be used once and the 'l' must be the last letter.\n"
    "# Comment out to disable",
    0,
    CONF_OFFSET(despeckle),
    copy_string,
    print_string
    },
    {
    "area_detect",
    "# Detect motion in predefined areas (1 - 9). Areas are numbered like that:  1 2 3\n" 
    "# A script (on_area_detected) is started immediately when motion is         4 5 6\n"
    "# detected in one of the given areas, but only once during an event.        7 8 9\n"
    "# One or more areas can be specified with this option. (Default: not defined)",
    0,
    CONF_OFFSET(area_detect),
    copy_string,
    print_string
    },
    {
    "mask_file",
    "# PGM file to use as a sensitivity mask.\n"
    "# Full path name to. (Default: not defined)",
    0,
    CONF_OFFSET(mask_file),
    copy_string,
    print_string
    },
    {
    "smart_mask_speed",
    "# Dynamically create a mask file during operation (default: 0)\n"
    "# Adjust speed of mask changes from 0 (off) to 10 (fast)",
    0,
    CONF_OFFSET(smart_mask_speed),
    copy_int,
    print_int
    },
    {
    "lightswitch",
    "# Ignore sudden massive light intensity changes given as a percentage of the picture\n"
    "# area that changed intensity. Valid range: 0 - 100 , default: 0 = disabled",
    0,
    CONF_OFFSET(lightswitch),
    copy_int,
    print_int
    },
    {
    "minimum_motion_frames",
    "# Picture frames must contain motion at least the specified number of frames\n"
    "# in a row before they are detected as true motion. At the default of 1, all\n"
    "# motion is detected. Valid range: 1 to thousands, recommended 1-5",
    0,
    CONF_OFFSET(minimum_motion_frames),
    copy_int,
    print_int
    },
    {
    "pre_capture",
    "# Specifies the number of pre-captured (buffered) pictures from before motion\n"
    "# was detected that will be output at motion detection.\n"
    "# Recommended range: 0 to 5 (default: 0)\n"
    "# Do not use large values! Large values will cause Motion to skip video frames and\n"
    "# cause unsmooth mpegs. To smooth mpegs use larger values of post_capture instead.",
    0,
    CONF_OFFSET(pre_capture),
    copy_int,
    print_int
    },
    {
    "post_capture",
    "# Number of frames to capture after motion is no longer detected (default: 0)",
    0,
    CONF_OFFSET(post_capture),
    copy_int,
    print_int
    },
    {
    "gap",
    "# Gap is the seconds of no motion detection that triggers the end of an event\n"
    "# An event is defined as a series of motion images taken within a short timeframe.\n"
    "# Recommended value is 60 seconds (Default). The value 0 is allowed and disables\n"
    "# events causing all Motion to be written to one single mpeg file and no pre_capture.",
    0,
    CONF_OFFSET(gap),
    copy_int,
    print_int
    },
    {
    "max_mpeg_time",
    "# Maximum length in seconds of an mpeg movie\n"
    "# When value is exceeded a new mpeg file is created. (Default: 0 = infinite)",
    0,
    CONF_OFFSET(maxmpegtime),
    copy_int,
    print_int
    },
    {
    "output_all",
    "# Always save images even if there was no motion (default: off)",
    0,
    CONF_OFFSET(output_all),
    copy_bool,
    print_bool
    },
    {
    "output_normal",
    "\n############################################################\n"
    "# Image File Output\n"
    "############################################################\n\n"
    "# Output 'normal' pictures when motion is detected (default: on)\n"
    "# Valid values: on, off, first, best, center\n"
    "# When set to 'first', only the first picture of an event is saved.\n"
    "# Picture with most motion of an event is saved when set to 'best'.\n"
    "# Picture with motion nearest center of picture is saved when set to 'center'.\n"
    "# Can be used as preview shot for the corresponding movie.",
    0,
    CONF_OFFSET(output_normal),
    copy_string,
    print_string
    },
    {
    "output_motion",
    "# Output pictures with only the pixels moving object (ghost images) (default: off)",
    0,
    CONF_OFFSET(motion_img),
    copy_bool,
    print_bool
    },
    {
    "quality",
    "# The quality (in percent) to be used by the jpeg compression (default: 75)",
    0,
    CONF_OFFSET(quality),
    copy_int,
    print_int
    },
    {
    "ppm",
    "# Output ppm images instead of jpeg (default: off)",
    0,
    CONF_OFFSET(ppm),
    copy_bool,
    print_bool
    },
#ifdef HAVE_FFMPEG
    {
    "ffmpeg_cap_new",
    "\n############################################################\n"
    "# FFMPEG related options\n"
    "# Film (mpeg) file output, and deinterlacing of the video input\n"
    "# The options movie_filename and timelapse_filename are also used\n"
    "# by the ffmpeg feature\n"
    "############################################################\n\n"
    "# Use ffmpeg to encode mpeg movies in realtime (default: off)",
    0,
    CONF_OFFSET(ffmpeg_cap_new),
    copy_bool,
    print_bool
    },
    {
    "ffmpeg_cap_motion",
    "# Use ffmpeg to make movies with only the pixels moving\n"
    "# object (ghost images) (default: off)",
    0,
    CONF_OFFSET(ffmpeg_cap_motion),
    copy_bool,
    print_bool
    },
    {
    "ffmpeg_timelapse",
    "# Use ffmpeg to encode a timelapse movie\n"
    "# Default value 0 = off - else save frame every Nth second",
    0,
    CONF_OFFSET(timelapse),
    copy_int,
    print_int
    },
    {
    "ffmpeg_timelapse_mode",
    "# The file rollover mode of the timelapse video\n"
    "# Valid values: hourly, daily (default), weekly-sunday, weekly-monday, monthly, manual",
    0,
    CONF_OFFSET(timelapse_mode),
    copy_string,
    print_string
    },
    {
    "ffmpeg_bps",
    "# Bitrate to be used by the ffmpeg encoder (default: 400000)\n"
    "# This option is ignored if ffmpeg_variable_bitrate is not 0 (disabled)",
    0,
    CONF_OFFSET(ffmpeg_bps),
    copy_int,
    print_int
    },
    {
    "ffmpeg_variable_bitrate",
    "# Enables and defines variable bitrate for the ffmpeg encoder.\n"
    "# ffmpeg_bps is ignored if variable bitrate is enabled.\n"
    "# Valid values: 0 (default) = fixed bitrate defined by ffmpeg_bps,\n"
    "# or the range 2 - 31 where 2 means best quality and 31 is worst.",
    0,
    CONF_OFFSET(ffmpeg_vbr),
    copy_int,
    print_int
    },
    {
    "ffmpeg_video_codec",
    "# Codec to used by ffmpeg for the video compression.\n"
    "# Timelapse mpegs are always made in mpeg1 format independent from this option.\n"
    "# Supported formats are: mpeg1 (ffmpeg-0.4.8 only), mpeg4 (default), and msmpeg4.\n"
    "# mpeg1 - gives you files with extension .mpg\n"
    "# mpeg4 or msmpeg4 - gives you files with extension .avi\n"
    "# msmpeg4 is recommended for use with Windows Media Player because\n"
    "# it requires no installation of codec on the Windows client.\n"
    "# swf - gives you a flash film with extension .swf\n"
    "# flv - gives you a flash video with extension .flv\n"
    "# ffv1 - FF video codec 1 for Lossless Encoding ( experimental )\n"
    "# mov - QuickTime ( testing )",
    0,
    CONF_OFFSET(ffmpeg_video_codec),
    copy_string,
    print_string
    },
    {
    "ffmpeg_deinterlace",
    "# Use ffmpeg to deinterlace video. Necessary if you use an analog camera\n"
    "# and see horizontal combing on moving objects in video or pictures.\n"
    "# (default: off)",
    0,
    CONF_OFFSET(ffmpeg_deinterlace),
    copy_bool,
    print_bool
    },
#endif /* HAVE_FFMPEG */
    {
    "snapshot_interval",
    "\n############################################################\n"
    "# Snapshots (Traditional Periodic Webcam File Output)\n"
    "############################################################\n\n"
    "# Make automated snapshot every N seconds (default: 0 = disabled)",
    0,
    CONF_OFFSET(snapshot_interval),
    copy_int,
    print_int
    },
    {
    "locate",
    "\n############################################################\n"
    "# Text Display\n"
    "# %Y = year, %m = month, %d = date,\n"
    "# %H = hour, %M = minute, %S = second, %T = HH:MM:SS,\n"
    "# %v = event, %q = frame number, %t = thread (camera) number,\n"
    "# %D = changed pixels, %N = noise level, \\n = new line,\n"
    "# %i and %J = width and height of motion area,\n"
    "# %K and %L = X and Y coordinates of motion center\n"
    "# %C = value defined by text_event - do not use with text_event!\n"
    "# You can put quotation marks around the text to allow\n"
    "# leading spaces\n"
    "############################################################\n\n"
    "# Locate and draw a box around the moving object.\n"
    "# Valid values: on, off and preview (default: off)\n"
    "# Set to 'preview' will only draw a box in preview_shot pictures.",
    0,
    CONF_OFFSET(locate),
    copy_string,
    print_string
    },
    {
    "text_right",
    "# Draws the timestamp using same options as C function strftime(3)\n"
    "# Default: %Y-%m-%d\\n%T = date in ISO format and time in 24 hour clock\n"
    "# Text is placed in lower right corner",
    0,
    CONF_OFFSET(text_right),
    copy_string,
    print_string
    },
    {
    "text_left",
    "# Draw a user defined text on the images using same options as C function strftime(3)\n"
    "# Default: Not defined = no text\n"
    "# Text is placed in lower left corner",
    0,
    CONF_OFFSET(text_left),
    copy_string,
    print_string
    },
    {
    "text_changes",
    "# Draw the number of changed pixed on the images (default: off)\n"
    "# Will normally be set to off except when you setup and adjust the motion settings\n"
    "# Text is placed in upper right corner",
    0,
    CONF_OFFSET(text_changes),
    copy_bool,
    print_bool
    },
    {
    "text_event",
    "# This option defines the value of the special event conversion specifier %C\n"
    "# You can use any conversion specifier in this option except %C. Date and time\n"
    "# values are from the timestamp of the first image in the current event.\n"
    "# Default: %Y%m%d%H%M%S\n"
    "# The idea is that %C can be used filenames and text_left/right for creating\n"
    "# a unique identifier for each event.",
    0,
    CONF_OFFSET(text_event),
    copy_string,
    print_string
    },
    {
    "text_double",
    "# Draw characters at twice normal size on images. (default: off)",
    0,
    CONF_OFFSET(text_double),
    copy_bool,
    print_bool
    },
    {
    "target_dir",
    "\n############################################################\n"
    "# Target Directories and filenames For Images And Films\n"
    "# For the options snapshot_, jpeg_, mpeg_ and timelapse_filename\n"
    "# you can use conversion specifiers\n"
    "# %Y = year, %m = month, %d = date,\n"
    "# %H = hour, %M = minute, %S = second,\n"
    "# %v = event, %q = frame number, %t = thread (camera) number,\n"
    "# %D = changed pixels, %N = noise level,\n"
    "# %i and %J = width and height of motion area,\n"
    "# %K and %L = X and Y coordinates of motion center\n"
    "# %C = value defined by text_event\n"
    "# Quotation marks round string are allowed.\n"
    "############################################################\n\n"
    "# Target base directory for pictures and films\n"
    "# Recommended to use absolute path. (Default: current working directory)",
    0,
    CONF_OFFSET(filepath),
    copy_string,
    print_string
    },
    {
    "snapshot_filename",
    "# File path for snapshots (jpeg or ppm) relative to target_dir\n"
    "# Default: "DEF_SNAPPATH"\n"
    "# Default value is equivalent to legacy oldlayout option\n"
    "# For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-snapshot\n"
    "# File extension .jpg or .ppm is automatically added so do not include this.\n"
    "# Note: A symbolic link called lastsnap.jpg created in the target_dir will always\n"
    "# point to the latest snapshot, unless snapshot_filename is exactly 'lastsnap'",
    0,
    CONF_OFFSET(snappath),
    copy_string,
    print_string
    },
    {
    "jpeg_filename",
    "# File path for motion triggered images (jpeg or ppm) relative to target_dir\n"
    "# Default: "DEF_JPEGPATH"\n"
    "# Default value is equivalent to legacy oldlayout option\n"
    "# For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-%q\n"
    "# File extension .jpg or .ppm is automatically added so do not include this\n"
    "# Set to 'preview' together with best-preview feature enables special naming\n"
    "# convention for preview shots. See motion guide for details",
    0,
    CONF_OFFSET(jpegpath),
    copy_string,
    print_string
    },
#ifdef HAVE_FFMPEG
    {
    "movie_filename",
    "# File path for motion triggered ffmpeg films (mpeg) relative to target_dir\n"
    "# Default: "DEF_MPEGPATH"\n"
    "# Default value is equivalent to legacy oldlayout option\n"
    "# For Motion 3.0 compatible mode choose: %Y/%m/%d/%H%M%S\n"
    "# File extension .mpg or .avi is automatically added so do not include this\n"
    "# This option was previously called ffmpeg_filename",
    0,
    CONF_OFFSET(mpegpath),
    copy_string,
    print_string
    },
    {
    "timelapse_filename",
    "# File path for timelapse mpegs relative to target_dir\n"
    "# Default: "DEF_TIMEPATH"\n"
    "# Default value is near equivalent to legacy oldlayout option\n"
    "# For Motion 3.0 compatible mode choose: %Y/%m/%d-timelapse\n"
    "# File extension .mpg is automatically added so do not include this",
    0,
    CONF_OFFSET(timepath),
    copy_string,
    print_string
    },
#endif /* HAVE_FFMPEG */
    {
    "webcam_port",
    "\n############################################################\n"
    "# Live Webcam Server\n"
    "############################################################\n\n"
    "# The mini-http server listens to this port for requests (default: 0 = disabled)",
    0,
    CONF_OFFSET(webcam_port),
    copy_int,
    print_int
    },
    {
    "webcam_quality",
    "# Quality of the jpeg (in percent) images produced (default: 50)",
    0,
    CONF_OFFSET(webcam_quality),
    copy_int,
    print_int
    },
    {
    "webcam_motion",
    "# Output frames at 1 fps when no motion is detected and increase to the\n"
    "# rate given by webcam_maxrate when motion is detected (default: off)",
    0,
    CONF_OFFSET(webcam_motion),
    copy_bool,
    print_bool
    },
    {
    "webcam_maxrate",
    "# Maximum framerate for webcam streams (default: 1)",
    0,
    CONF_OFFSET(webcam_maxrate),
    copy_int,
    print_int
    },
    {
    "webcam_localhost",
    "# Restrict webcam connections to localhost only (default: on)",
    0,
    CONF_OFFSET(webcam_localhost),
    copy_bool,
    print_bool
    },
    {
    "webcam_limit",
    "# Limits the number of images per connection (default: 0 = unlimited)\n"
    "# Number can be defined by multiplying actual webcam rate by desired number of seconds\n"
    "# Actual webcam rate is the smallest of the numbers framerate and webcam_maxrate",
    0,
    CONF_OFFSET(webcam_limit),
    copy_int,
    print_int
    },
    {
    "control_port",
    "\n############################################################\n"
    "# HTTP Based Control\n"
    "############################################################\n\n"
    "# TCP/IP port for the http server to listen on (default: 0 = disabled)",
    1,
    CONF_OFFSET(control_port),
    copy_int,
    print_int
    },
    {
    "control_localhost",
    "# Restrict control connections to localhost only (default: on)",
    1,
    CONF_OFFSET(control_localhost),
    copy_bool,
    print_bool
    },
    {
    "control_html_output",
    "# Output for http server, select off to choose raw text plain (default: on)",
    1,
    CONF_OFFSET(control_html_output),
    copy_bool,
    print_bool
    },
    {
    "control_authentication",
    "# Authentication for the http based control. Syntax username:password\n"
    "# Default: not defined (Disabled)",
    1,
    CONF_OFFSET(control_authentication),
    copy_string,
    print_string
    },    
    {
    "track_type",
    "\n############################################################\n"
    "# Tracking (Pan/Tilt)\n"
    "############################################################\n\n"
    "# Type of tracker (0=none (default), 1=stepper, 2=iomojo, 3=pwc, 4=generic, 5=uvcvideo)\n"
    "# The generic type enables the definition of motion center and motion size to\n"
    "# be used with the conversion specifiers for options like on_motion_detected",
    0,
    TRACK_OFFSET(type),
    copy_short,
    print_short
    },
    {
    "track_auto",
    "# Enable auto tracking (default: off)",
    0,
    TRACK_OFFSET(active),
    copy_bool,
    print_bool
    },
    {
    "track_port",
    "# Serial port of motor (default: none)",
    0,
    TRACK_OFFSET(port),
    copy_string,
    print_string
    },
    {
    "track_motorx",
    "# Motor number for x-axis (default: 0)",
    0,
    TRACK_OFFSET(motorx),
    copy_short,
    print_short
    },
    {
    "track_motory",
    "# Motor number for y-axis (default: 0)",
    0,
    TRACK_OFFSET(motory),
    copy_short,
    print_short
    },
    {
    "track_maxx",
    "# Maximum value on x-axis (default: 0)",
    0,
    TRACK_OFFSET(maxx),
    copy_short,
    print_short
    },
    {
    "track_maxy",
    "# Maximum value on y-axis (default: 0)",
    0,
    TRACK_OFFSET(maxy),
    copy_short,
    print_short
    },
    {
    "track_iomojo_id",
    "# ID of an iomojo camera if used (default: 0)",
    0,
    TRACK_OFFSET(iomojo_id),
    copy_short,
    print_short
    },
    {
    "track_step_angle_x",
    "# Angle in degrees the camera moves per step on the X-axis\n"
    "# with auto-track (default: 10)\n"
    "# Currently only used with pwc type cameras",
    0,
    TRACK_OFFSET(step_angle_x),
    copy_short,
    print_short
    },
    {
    "track_step_angle_y",
    "# Angle in degrees the camera moves per step on the Y-axis\n"
    "# with auto-track (default: 10)\n"
    "# Currently only used with pwc type cameras",
    0,
    TRACK_OFFSET(step_angle_y),
    copy_short,
    print_short
    },
    {
    "track_move_wait",
    "# Delay to wait for after tracking movement as number\n"
    "# of picture frames (default: 10)",
    0,
    TRACK_OFFSET(move_wait),
    copy_short,
    print_short
    },
    {
    "track_speed",
    "# Speed to set the motor to (stepper motor option) (default: 255)",
    0,
    TRACK_OFFSET(speed),
    copy_short,
    print_short
    },
    {
    "track_stepsize",
    "# Number of steps to make (stepper motor option) (default: 40)",
    0,
    TRACK_OFFSET(stepsize),
    copy_short,
    print_short
    },
    {
    "quiet",
    "\n############################################################\n"
    "# External Commands, Warnings and Logging:\n"
    "# You can use conversion specifiers for the on_xxxx commands\n"
    "# %Y = year, %m = month, %d = date,\n"
    "# %H = hour, %M = minute, %S = second,\n"
    "# %v = event, %q = frame number, %t = thread (camera) number,\n"
    "# %D = changed pixels, %N = noise level,\n"
    "# %i and %J = width and height of motion area,\n"
    "# %K and %L = X and Y coordinates of motion center\n"
    "# %C = value defined by text_event\n"
    "# %f = filename with full path\n"
    "# %n = number indicating filetype\n"
    "# Both %f and %n are only defined for on_picture_save,\n"
    "# on_movie_start and on_movie_end\n" 
    "# Quotation marks round string are allowed.\n"
    "############################################################\n\n"
    "# Do not sound beeps when detecting motion (default: on)\n"
    "# Note: Motion never beeps when running in daemon mode.",
    0,
    CONF_OFFSET(quiet),
    copy_bool,
    print_bool
    },
    {
    "on_event_start",
    "# Command to be executed when an event starts. (default: none)\n"
    "# An event starts at first motion detected after a period of no motion defined by gap ",
    0,
    CONF_OFFSET(on_event_start),
    copy_string,
    print_string
    },
    {
    "on_event_end",
    "# Command to be executed when an event ends after a period of no motion\n"
    "# (default: none). The period of no motion is defined by option gap.",
    0,
    CONF_OFFSET(on_event_end),
    copy_string,
    print_string
    },
    {
    "on_picture_save",
    "# Command to be executed when a picture (.ppm|.jpg) is saved (default: none)\n"
    "# To give the filename as an argument to a command append it with %f",
    0,
    CONF_OFFSET(on_picture_save),
    copy_string,
    print_string
    },
    {
    "on_motion_detected",
    "# Command to be executed when a motion frame is detected (default: none)",
    0,
    CONF_OFFSET(on_motion_detected),
    copy_string,
    print_string
    },
    {
    "on_area_detected",
    "# Command to be executed when motion in a predefined area is detected\n"
    "# Check option 'area_detect'. (default: none)",
    0,
    CONF_OFFSET(on_area_detected),
    copy_string,
    print_string
    },
#ifdef HAVE_FFMPEG
    {
    "on_movie_start",
    "# Command to be executed when a movie file (.mpg|.avi) is created. (default: none)\n"
    "# To give the filename as an argument to a command append it with %f",
    0,
    CONF_OFFSET(on_movie_start),
    copy_string,
    print_string
    },
    {
    "on_movie_end",
    "# Command to be executed when a movie file (.mpg|.avi) is closed. (default: none)\n"
    "# To give the filename as an argument to a command append it with %f",
    0,
    CONF_OFFSET(on_movie_end),
    copy_string,
    print_string
    },
#endif /* HAVE_FFMPEG */
    {
    "on_camera_lost",
    "# Command to be executed when a camera can't be opened or if it is lost\n"
    "# NOTE: There is situations when motion doesn't detect a lost camera!\n"
    "# It depends on the driver, some drivers don't detect a lost camera at all\n"
    "# Some hang the motion thread. Some even hang the PC! (default: none)",
    0,
    CONF_OFFSET(on_camera_lost),
    copy_string,
    print_string
    },

#if defined(HAVE_MYSQL) || defined(HAVE_PGSQL)
    {
    "sql_log_image",
    "\n############################################################\n"
    "# Common Options For MySQL and PostgreSQL database features.\n"
    "# Options require the MySQL/PostgreSQL options to be active also.\n"
    "############################################################\n\n"
    "# Log to the database when creating motion triggered image file  (default: on)",
    0,
    CONF_OFFSET(sql_log_image),
    copy_bool,
    print_bool
    },
    {
    "sql_log_snapshot",
    "# Log to the database when creating a snapshot image file (default: on)",
    0,
    CONF_OFFSET(sql_log_snapshot),
    copy_bool,
    print_bool
    },
    {
    "sql_log_mpeg",
    "# Log to the database when creating motion triggered mpeg file (default: off)",
    0,
    CONF_OFFSET(sql_log_mpeg),
    copy_bool,
    print_bool
    },
    {
    "sql_log_timelapse",
    "# Log to the database when creating timelapse mpeg file (default: off)",
    0,
    CONF_OFFSET(sql_log_timelapse),
    copy_bool,
    print_bool
    },
    {
    "sql_query",
    "# SQL query string that is sent to the database\n"
    "# Use same conversion specifiers has for text features\n"
    "# Additional special conversion specifiers are\n"
    "# %n = the number representing the file_type\n"
    "# %f = filename with full path\n"
    "# Default value:\n"
    "# insert into security(camera, filename, frame, file_type, time_stamp, text_event) values('%t', '%f', '%q', '%n', '%Y-%m-%d %T', '%C')",
    0,
    CONF_OFFSET(sql_query),
    copy_string,
    print_string
    },
#endif /* defined(HAVE_MYSQL) || defined(HAVE_PGSQL) */

#ifdef HAVE_MYSQL
    {
    "mysql_db",
    "\n############################################################\n"
    "# Database Options For MySQL\n"
    "############################################################\n\n"
    "# Mysql database to log to (default: not defined)",
    0,
    CONF_OFFSET(mysql_db),
    copy_string,
    print_string
    },
    {
    "mysql_host",
    "# The host on which the database is located (default: localhost)",
    0,
    CONF_OFFSET(mysql_host),
    copy_string,
    print_string
    },
    {
    "mysql_user",
    "# User account name for MySQL database (default: not defined)",
    0,
    CONF_OFFSET(mysql_user),
    copy_string,
    print_string
    },
    {
    "mysql_password",
    "# User password for MySQL database (default: not defined)",
    0,
    CONF_OFFSET(mysql_password),
    copy_string,
    print_string
    },
#endif /* HAVE_MYSQL */

#ifdef HAVE_PGSQL
    {
    "pgsql_db",
    "\n############################################################\n"
    "# Database Options For PostgreSQL\n"
    "############################################################\n\n"
    "# PostgreSQL database to log to (default: not defined)",
    0,
    CONF_OFFSET(pgsql_db),
    copy_string,
    print_string
    },
    {
    "pgsql_host",
    "# The host on which the database is located (default: localhost)",
    0,
    CONF_OFFSET(pgsql_host),
    copy_string,
    print_string
    },
    {
    "pgsql_user",
    "# User account name for PostgreSQL database (default: not defined)",
    0,
    CONF_OFFSET(pgsql_user),
    copy_string,
    print_string
    },
    {
    "pgsql_password",
    "# User password for PostgreSQL database (default: not defined)",
    0,
    CONF_OFFSET(pgsql_password),
    copy_string,
    print_string
    },
    {
    "pgsql_port",
    "# Port on which the PostgreSQL database is located (default: 5432)",
    0,
    CONF_OFFSET(pgsql_port),
    copy_int,
    print_int
    },
#endif /* HAVE_PGSQL */
    {
    "video_pipe",
    "\n############################################################\n"
    "# Video Loopback Device (vloopback project)\n"
    "############################################################\n\n"
    "# Output images to a video4linux loopback device\n"
    "# The value '-' means next available (default: not defined)",    
    0,
    CONF_OFFSET(vidpipe),
    copy_string,
    print_string
    },
    {
    "motion_video_pipe",
    "# Output motion images to a video4linux loopback device\n"
    "# The value '-' means next available (default: not defined)",
    0,
    CONF_OFFSET(motionvidpipe),
    copy_string,
    print_string
    },
    {
    "thread",
    "\n##############################################################\n"
    "# Thread config files - One for each camera.\n"
    "# Except if only one camera - You only need this config file.\n"
    "# If you have more than one camera you MUST define one thread\n"
    "# config file for each camera in addition to this config file.\n"
    "##############################################################\n",
    1,
    0,
    config_thread,
    print_thread
    },
    { NULL, NULL, 0, 0, NULL, NULL }
};

/* conf_cmdline sets the conf struct options as defined by the command line.
 * Any option already set from a config file are overridden.
 */
static void conf_cmdline(struct context *cnt, short int thread)
{
    struct config *conf = &cnt->conf;
    int c;

    /* For the string options, we free() if necessary and malloc()
     * if necessary. This is accomplished by calling mystrcpy();
     * see this function for more information.
     */
    while ((c = getopt(conf->argc, conf->argv, "c:d:hns?p:")) != EOF)
        switch (c) {
        case 'c':
            if (thread == -1) 
                strcpy(cnt->conf_filename, optarg);
            break;
        case 'n':
            cnt->daemon = 0;
            break;
        case 's':
            conf->setup_mode = 1;
            break;
        case 'd':
            /* no validation - just take what user gives */
            debug_level = (unsigned short int)atoi(optarg);
            break;
        case 'p':
            if (thread == -1) 
                strcpy(cnt->pid_file, optarg);
            break;    
        case 'h':
        case '?':
        default:
            usage();
            exit(1);
        }
    optind = 1;
}


/* conf_cmdparse sets a config option given by 'cmd' to the value given by 'arg1'.
 * Based on the name of the option it searches through the struct 'config_params'
 * for an option where the config_params[i].param_name matches the option.
 * By calling the function pointed to by config_params[i].copy the option gets
 * assigned.
 */
struct context **conf_cmdparse(struct context **cnt, const char *cmd, const char *arg1)
{
    unsigned short int i = 0;

    if (!cmd)
        return cnt;

    /* We search through config_params until we find a param_name that matches
     * our option given by cmd (or reach the end = NULL)
     */
    while (config_params[i].param_name != NULL) {
        if (!strncasecmp(cmd, config_params[i].param_name , 255 + 50)) { // Why +50?
    
            /* if config_param is string we don't want to check arg1 */        
            if (strcmp(config_type(&config_params[i]),"string")) {
                if (config_params[i].conf_value && !arg1)
                    return cnt;
            }
            
            /* We call the function given by the pointer config_params[i].copy
             * If the option is a bool, copy_bool is called.
             * If the option is an int, copy_int is called.
             * If the option is a short, copy_short is called.
             * If the option is a string, copy_string is called.
             * If the option is a thread, config_thread is called.
             * The arguments to the function are:
             *  cnt  - a pointer to the context structure
             *  arg1 - a pointer to the new option value (represented as string)
             *  config_params[i].conf_value - an integer value which is a pointer
             *    to the context structure member relative to the pointer cnt.
             */
            cnt = config_params[i].copy(cnt, arg1, config_params[i].conf_value);
            return cnt;
        }
        i++;
    }

    /* We reached the end of config_params without finding a matching option */
    motion_log(LOG_ERR, 0, "Unknown config option \"%s\"", cmd);

    return cnt;
}

/* conf_process walks through an already open config file line by line
 * Any line starting with '#' or ';' or empty lines are ignored as a comments.
 * Any non empty line is process so that the first word is the name of an option 'cnd'
 * and the rest of the line is the argument 'arg1'
 * White space before the first word, between option and argument and end of the line
 * is discarded. A '=' between option and first word in argument is also discarded.
 * Quotation marks round the argument are also discarded.
 * For each option/argument pair the function conf_cmdparse is called which takes
 * care of assigning the value to the option in the config structures.
 */
static struct context **conf_process(struct context **cnt, FILE *fp)
{
    /* process each line from the config file */
    
    char line[PATH_MAX], *cmd = NULL, *arg1 = NULL;
    char *beg = NULL, *end = NULL;

    while (fgets(line, PATH_MAX-1, fp)) {
        if (!(line[0] == '#' || line[0] == ';' || strlen(line) < 2)) {/* skipcomment */
            
            arg1 = NULL;

            /* trim white space and any CR or LF at the end of the line */
            end = line + strlen(line) - 1; /* Point to the last non-null character in the string */
            while (*end == ' ' || *end == '\t' || *end == '\n' || *end == '\r')
                end--;

            *(end+1) = '\0';
            
            /* If line is only whitespace we continue to the next line */
            if (strlen(line) == 0)
                continue;

            /* trim leading whitespace from the line and find command */
            beg = line;
            
            while (*beg == ' ' || *beg == '\t')
                beg++;

            cmd = beg; /* command starts here */

            while (*beg != ' ' && *beg != '\t' && *beg != '=' && *beg != '\0')
                beg++;
            
            *beg = '\0'; /* command string terminates here */

            /* trim space between command and argument */
            beg++;

            if (strlen(beg) > 0) {
                while (*beg == ' ' || *beg == '\t' || *beg == '=' || *beg == '\n' || *beg == '\r')
                    beg++;
                

                /* If argument is in "" we will strip them off
                   It is important that we can use "" so that we can use
                   leading spaces in text_left and text_right */
                if ((beg[0]=='"' && beg[strlen(beg)-1]=='"') ||
                    (beg[0]=='\'' && beg[strlen(beg)-1]=='\'')) {
                    beg[strlen(beg)-1]='\0';
                    beg++;
                }
                
                arg1 = beg; /* Argument starts here */
            }
            /* else arg1 stays null pointer */

            cnt = conf_cmdparse(cnt, cmd, arg1);
        }
    }

    return cnt;
}


/* conf_print is used to write out the config file(s) motion.conf and any thread
 * config files. The function is called when using http remote control.
 */
void conf_print(struct context **cnt)
{
    const char *retval;
    char *val;
    unsigned short int i, thread;
    FILE *conffile;

    for (thread = 0; cnt[thread]; thread++) {
        motion_log(LOG_INFO, 0, "Writing config file to %s",cnt[thread]->conf_filename);
        conffile=myfopen(cnt[thread]->conf_filename, "w");

        if (!conffile)
            continue;

        fprintf(conffile, "# %s\n", cnt[thread]->conf_filename);
        fprintf(conffile, "#\n# This config file was generated by motion " VERSION "\n");
        fprintf(conffile, "\n\n");

        for (i = 0; config_params[i].param_name; i++) {
            retval=config_params[i].print(cnt, NULL, i, thread);
            /*If config parameter has a value (not NULL) print it to the config file*/

            if (retval) {
                fprintf(conffile, "%s\n", config_params[i].param_help);
                /* If the option is a text_* and first char is a space put
                   quotation marks around to allow leading spaces */
                if (strncmp(config_params[i].param_name, "text", 4) || strncmp(retval, " ", 1))
                    fprintf(conffile, "%s %s\n\n", config_params[i].param_name, retval);
                else
                    fprintf(conffile, "%s \"%s\"\n\n", config_params[i].param_name, retval);
            } else {
                val = NULL;
                config_params[i].print(cnt, &val, i, thread);
                /* It can either be a thread file parameter or a disabled parameter
                   If it is a thread parameter write it out
                   Else write the disabled option to the config file but with a
                   comment mark in front of the parameter name */
                if (val) {
                    fprintf(conffile,"%s\n", config_params[i].param_help);
                    fprintf(conffile, "%s\n", val);

                    if (strlen(val) == 0)
                        fprintf(conffile,"; thread /usr/local/etc/thread1.conf\n");
                    free(val);
                } else if (thread == 0) {        
                    fprintf(conffile,"%s\n", config_params[i].param_help);
                    fprintf(conffile,"; %s value\n\n", config_params[i].param_name);
                }
            }
        }

        fprintf(conffile, "\n");
        fclose(conffile);
        conffile = NULL;
    }
}

/**************************************************************************
 * conf_load is the main function, called from motion.c
 * The function sets the important context structure "cnt" including
 * loading the config parameters from config files and command line.
 * The following takes place in the function:
 * - The default start values for cnt stored in the struct conf_template
 *   are copied to cnt[0] which is the default context structure common to
 *   all threads.
 * - All config (cnt.conf) struct members pointing to a string are changed
 *   so that they point to a malloc'ed piece of memory containing a copy of
 *   the string given in conf_template.
 * - motion.conf is opened and processed. The process populates the cnt[0] and
 *   for each thread config file it populates a cnt[1], cnt[2]... for each
 *   thread
 * - Finally it process the options given in the command line. This is done
 *   for each thread cnt[i] so that the command line options overrides any
 *   option given by motion.conf or a thread config file.
 **************************************************************************/
struct context **conf_load(struct context **cnt)
{
    FILE *fp = NULL;
    char filename[PATH_MAX];
    int i;
    /* We preserve argc and argv because they get overwritten by the memcpy command */
    char **argv = cnt[0]->conf.argv;
    int argc = cnt[0]->conf.argc;

    /* Copy the template config structure with all the default config values
     * into cnt[0]->conf
     */
    memcpy(&cnt[0]->conf, &conf_template, sizeof(struct config));
    
    /* For each member of cnt[0] which is a pointer to a string
     * if the member points to a string in conf_template and is not NULL
     * 1. Reserve (malloc) memory for the string
     * 2. Copy the conf_template given string to the reserved memory
     * 3. Change the cnt[0] member (char*) pointing to the string in reserved memory
     * This ensures that we can free and malloc the string when changed
     * via http remote control or config file or command line options
     */
    malloc_strings(cnt[0]);

    /* Restore the argc and argv */
    cnt[0]->conf.argv = argv;
    cnt[0]->conf.argc = argc;

    /* Open the motion.conf file. We try in this sequence:
     * 1. commandline
     * 2. current working directory
     * 3. $HOME/.motion/motion.conf
     * 4. sysconfig/motion.conf
     */
    /* Get filename & pid file from commandline */
    cnt[0]->conf_filename[0] = 0;
    cnt[0]->pid_file[0] = 0;

    conf_cmdline(cnt[0], -1);
    if (cnt[0]->conf_filename[0]) { /* User has supplied filename on commandline*/
        strcpy(filename, cnt[0]->conf_filename);
        fp = fopen (filename, "r");
    }

    if (!fp) {      /* Commandline didn't work, try current dir */
        char *path = NULL;
        if (cnt[0]->conf_filename[0])
            motion_log(-1, 1, "Configfile %s not found - trying defaults.", filename);
        
        if ((path = get_current_dir_name()) == NULL) {
            motion_log(LOG_ERR, 1, "Error get_current_dir_name");
            exit(-1);
        }

        snprintf(filename, PATH_MAX, "%s/motion.conf", path);
        fp = fopen (filename, "r");
        free(path);
    }

    if (!fp) {     /* specified file does not exist... try default file */
        snprintf(filename, PATH_MAX, "%s/.motion/motion.conf", getenv("HOME"));
        fp = fopen(filename, "r");
        if (!fp) {
            snprintf(filename, PATH_MAX, "%s/motion.conf", sysconfdir);
            fp = fopen(filename, "r");
            if (!fp)        /* there is no config file.... use defaults */
                motion_log(-1, 1, "could not open configfile %s",filename);
        }
    }

    /* Now we process the motion.conf config file and close it*/
    if (fp) {
        strcpy(cnt[0]->conf_filename, filename);
        motion_log(LOG_INFO, 0, "Processing thread 0 - config file %s",filename);
        cnt = conf_process(cnt, fp);
        fclose(fp);
    } else {
        motion_log(LOG_INFO, 0, "Not config file to process using default values");
    }
    

    /* For each thread (given by cnt[i]) being not null
     * cnt is an array of pointers to a context type structure
     * cnt[0] is the default context structure
     * cnt[1], cnt[2], ... are context structures for each thread
     * Command line options always wins over config file options
     * so we go through each thread and overrides any set command line
     * options
     */
    i = -1;
    while (cnt[++i])
        conf_cmdline(cnt[i], i);

    /* if pid file was passed from command line copy to main thread conf struct */
    if (cnt[0]->pid_file[0])    
        cnt[0]->conf.pid_file = mystrcpy(cnt[0]->conf.pid_file, cnt[0]->pid_file);

    return cnt;
}

/* malloc_strings goes through the members of a context structure.
 * For each context structure member which is a pointer to a string it does this:
 * If the member points to a string and is not NULL
 * 1. Reserve (malloc) memory for the string
 * 2. Copy the original string to the reserved memory
 * 3. Change the cnt member (char*) pointing to the string in reserved memory
 * This ensures that we can free and malloc the string if it is later changed
 */
void malloc_strings(struct context * cnt)
{
    unsigned short int i = 0;
    char **val;
    while (config_params[i].param_name != NULL) {
        if (config_params[i].copy == copy_string) { /* if member is a string */
            /* val is made to point to a pointer to the current string */
            val = (char **)((char *)cnt+config_params[i].conf_value);

            /* if there is a string, malloc() space for it, copy
             * the string to new space, and point to the new
             * string. we don't free() because we're copying a
             * static string.
             */
            *val = mystrdup(*val);
        }
        i++;
    }
}

/************************************************************************
 * copy functions
 *
 *   copy_bool   - convert a bool representation to int
 *   copy_int    - convert a string to int
 *   copy_short  - convert a string to short
 *   copy_string - just a string copy
 *
 * @param str     - A char *, pointing to a string representation of the
 *                  value.
 * @param val_ptr - points to the place where to store the value relative
 *                  to pointer pointing to the given context structure
 * @cnt           - points to a context structure for a thread
 *
 * The function is given a pointer cnt to a context structure and a pointer val_ptr
 * which is an integer giving the position of the structure member relative to the
 * pointer of the context structure.
 * If the context structure is for thread 0 (cnt[0]->threadnr is zero) then the
 * function also sets the value for all the child threads since thread 0 is the
 * global thread.
 * If the thread given belongs to a child thread (cnt[0]->threadnr is not zero)
 * the function will only assign the value for the given thread.
 ***********************************************************************/

/* copy_bool assigns a config option to a new boolean value.
 * The boolean is given as a string in str which is converted to 0 or 1 
 * by the function. Values 1, yes and on are converted to 1 ignoring case.
 * Any other value is converted to 0.
 */
static struct context **copy_bool(struct context **cnt, const char *str, int val_ptr)
{
    void *tmp;
    int i;

    i = -1;
    while (cnt[++i]) {
        tmp = (char *)cnt[i] + (int)val_ptr;
        if (!strcmp(str, "1") || !strcasecmp(str, "yes") || !strcasecmp(str,"on")) {
            *((int *)tmp) = 1;
        } else {
            *((int *)tmp) = 0;
        }

        if (cnt[0]->threadnr)
            return cnt;
    }
    return cnt;
}

/* copy_int assigns a config option to a new integer value.
 * The integer is given as a string in str which is converted to integer by the function.
 */
static struct context **copy_int(struct context **cnt, const char *str, int val_ptr)
{
    void *tmp;
    int i;

    i = -1;
    while (cnt[++i]) {
        tmp = (char *)cnt[i] + val_ptr;
        *((int *)tmp) = atoi(str);
        if (cnt[0]->threadnr)
            return cnt;
    }
    return cnt;
}

/* copy_short assigns a config option to a new short value.
 * The integer is given as a string in str which is converted to short by the function.
 */ 
static struct context **copy_short(struct context **cnt, const char *str, int val_ptr)
{
    void *tmp;
    int i;

    i = -1;
    while (cnt[++i]) {
        tmp = (char *)cnt[i] + val_ptr;
        *((short int *)tmp) = atoi(str);
        if (cnt[0]->threadnr)
            return cnt;
    }
    return cnt;
}

/* copy_string assigns a new string value to a config option.
 * Strings are handled differently from bool and int.
 * the char *conf->option that we are working on is free()'d
 * (if memory for it has already been malloc()'d), and set to
 * a freshly malloc()'d string with the value from str,
 * or NULL if str is blank
 */
struct context **copy_string(struct context **cnt, const char *str, int val_ptr)
{
    char **tmp;
    int i;

    i = -1;
    while (cnt[++i]) {
        tmp = (char **)((char *)cnt[i] + val_ptr);

        /* mystrcpy assigns the new string value
         * including free'ing and reserving new memory for it.
         */
        *tmp = mystrcpy(*tmp, str);

        /* set the option on all threads if setting the option
         * for thread 0; otherwise just set that one thread's option
         */
        if (cnt[0]->threadnr)
            return cnt;
    }
    return cnt;
}


/* mystrcpy is used to assign string type fields (e.g. config options)
 * In a way so that we the memory is malloc'ed to fit the string.
 * If a field is already pointing to a string (not NULL) the memory of the
 * old string is free'd and new memory is malloc'ed and filled with the
 * new string is copied into the the memory and with the char pointer
 * pointing to the new string.
 *
 * from - pointer to the new string we want to copy
 * to   - the pointer to the current string (or pointing to NULL)
 *        If not NULL the memory it points to is free'd.
 * function returns pointer to the new string which is in malloc'ed memory
 * FIXME The strings that are malloc'ed with this function should be freed
 * when the motion program is terminated normally instead of relying on the
 * OS to clean up.
 */
char *mystrcpy(char *to, const char *from)
{
    /* free the memory used by the to string, if such memory exists,
     * and return a pointer to a freshly malloc()'d string with the
     * same value as from.
     */

    if (to != NULL) 
        free(to);

    return mystrdup(from);
}


/* mystrdup return a pointer to a freshly malloc()'d string with the same
 * value as the string that the input parameter 'from' points to,
 * or NULL if the from string is 0 characters.
 * The function truncates the string to the length given by the environment
 * variable PATH_MAX to ensure that config options can always contain
 * a really long path but no more than that.
 */
char *mystrdup(const char *from)
{
    char *tmp;
    int stringlength;

    if (from == NULL || !strlen(from)) {
        tmp = NULL;
    } else {
        stringlength = strlen(from);
        stringlength = (stringlength < PATH_MAX ? stringlength : PATH_MAX);
        tmp = (char *)mymalloc(stringlength + 1);
        strncpy(tmp, from, stringlength);

        /* We must ensure the string always has a NULL terminator.
         * This necessary because strncpy will not append a NULL terminator
         * if the original string is greater than stringlength.
         */
        tmp += stringlength;
        *tmp = '\0';
        tmp -= stringlength;
    }
    return tmp;
}

const char *config_type(config_param *configparam)
{
    if (configparam->copy == copy_string)
        return "string";
    if (configparam->copy == copy_int)
        return "int";
    if (configparam->copy == copy_short)
        return "short";
    if (configparam->copy == copy_bool)
        return "bool";

    return "unknown";
}

static const char *print_bool(struct context **cnt, char **str ATTRIBUTE_UNUSED,
                               int parm, unsigned short int threadnr)
{
    int val = config_params[parm].conf_value;

    if (threadnr &&
        *(int*)((char *)cnt[threadnr] + val) == *(int*)((char *)cnt[0] + val))
        return NULL;

    if (*(int*)((char *)cnt[threadnr] + val))
        return "on";
    else
        return "off";
}

/* print_string returns a pointer to a string containing the value of the config option
 * If the option is not defined NULL is returned.
 * If the thread number is not 0 the string is compared with the value of the same
 * option in thread 0. If the value is the same, NULL is returned which means that
 * the option is not written to the thread config file.
 */
static const char *print_string(struct context **cnt,
                                 char **str ATTRIBUTE_UNUSED, int parm,
                                 unsigned short int threadnr)
{
    int val = config_params[parm].conf_value;
    const char **cptr0, **cptr1;
    
    /* strcmp does not like NULL so we have to check for this also */
    cptr0 = (const char **)((char *)cnt[0] + val);
    cptr1 = (const char **)((char *)cnt[threadnr] + val);
    if ((threadnr) && (*cptr0 != NULL) && (*cptr1 != NULL) && (!strcmp(*cptr0, *cptr1)))
        return NULL;

    return *cptr1;
}

static const char *print_int(struct context **cnt, char **str ATTRIBUTE_UNUSED,
                              int parm, unsigned short int threadnr)
{
    static char retval[20];
    int val = config_params[parm].conf_value;

    if (threadnr &&
        *(int*)((char *)cnt[threadnr] + val) == *(int*)((char *)cnt[0] + val))
        return NULL;

    sprintf(retval, "%d", *(int*)((char *)cnt[threadnr] + val));

    return retval;
}


static const char *print_short(struct context **cnt, char **str ATTRIBUTE_UNUSED,
                                int parm, unsigned short int threadnr) 
{
    static char retval[20];
    int val = config_params[parm].conf_value;

    if (threadnr &&
        *(short int*)((char *)cnt[threadnr] + val) == *(short int*)((char *)cnt[0] + val))
        return NULL;

    sprintf(retval, "%d", *(short int*)((char *)cnt[threadnr] + val));

    return retval;
}

static const char *print_thread(struct context **cnt, char **str,
                                 int parm ATTRIBUTE_UNUSED, unsigned short int threadnr)
{
    char *retval;
    unsigned short int i = 0;

    if (!str || threadnr)
        return NULL;

    retval = mymalloc(1);
    retval[0] = 0;
    while (cnt[++i]) {
        retval = myrealloc(retval, strlen(retval) + strlen(cnt[i]->conf_filename) + 10, "print_thread");
        sprintf(retval + strlen(retval), "thread %s\n", cnt[i]->conf_filename);
    }
    *str = retval;

    return NULL;
}

/* config_thread() is called during initial config file loading each time Motion
 * finds a thread option in motion.conf
 * The size of the context array is increased and the main context's values are
 * copied to the new thread.
 *
 * cnt  - pointer to the array of pointers pointing to the context structures
 * str  - pointer to a string which is the filename of the thread config file
 * val  - is not used. It is defined to be function header compatible with
 *        copy_int, copy_bool and copy_string.
 */
static struct context **config_thread(struct context **cnt, const char *str,
                                       int val ATTRIBUTE_UNUSED)
{
    int i;
    FILE *fp;
    
    if (cnt[0]->threadnr)
        return cnt;

    fp = fopen(str, "r");

    if (!fp) {
        motion_log(LOG_ERR, 1, "Thread config file %s not found",str);
        return cnt;
    }

    /* Find the current number of threads defined. */
    i = -1;
    while (cnt[++i]);

    /* Make space for the threads + the terminating NULL pointer
     * in the array of pointers to context structures
     * First thread is 0 so the number of threads is i+1
     * plus an extra for the NULL pointer. This gives i+2
     */
    cnt = myrealloc(cnt, sizeof(struct context *) * (i + 2), "config_thread");

    /* Now malloc space for an additional context structure for thread nr. i */
    cnt[i] = mymalloc(sizeof(struct context));
    
    /* And make this an exact clone of the context structure for thread 0 */
    memcpy(cnt[i], cnt[0], sizeof(struct context));

    /* All the integers are copies of the actual value.
     * The strings are all pointers to strings so we need to create
     * unique malloc'ed space for all the strings that are not NULL and
     * change the string pointers to point to the new strings.
     * malloc_strings takes care of this.
     */
    malloc_strings(cnt[i]);
    
    /* Mark the end if the array of pointers to context structures */
    cnt[i + 1] = NULL;

    /* process the thread's config file and notify user on console */
    strcpy(cnt[i]->conf_filename, str);
    motion_log(LOG_INFO, 0, "Processing config file %s", str);
    conf_process(cnt+i, fp);
    
    /* Finally we close the thread config file */
    fclose(fp);

    return cnt;
}

static void usage()
{
    printf("motion Version "VERSION", Copyright 2000-2005 Jeroen Vreeken/Folkert van Heusden/Kenneth Lavrsen\n");
    printf("\nusage:\tmotion [options]\n");
    printf("\n\n");
    printf("Possible options:\n\n");
    printf("-n\t\t\tRun in non-daemon mode.\n");
    printf("-s\t\t\tRun in setup mode.\n");
    printf("-c config\t\tFull path and filename of config file.\n");
    printf("-d level\t\tDebug mode.\n");
    printf("-p process_id_file\tFull path and filename of process id file (pid file).\n");
    printf("-h\t\t\tShow this screen.\n");
    printf("\n");
    printf("Motion is configured using a config file only. If none is supplied,\n");
    printf("it will read motion.conf from current directory, ~/.motion or %s.\n", sysconfdir);
    printf("\n");
}