Starting to turn relabsd into a proper daemon...

1 files changed, 0 insertions, 821 deletions

diff --git a/src/config.c b/src/config.c
deleted file mode 100644
index ad060a5..0000000
--- a/src/config.c
+++ /dev/null
@@ -1,821 +0,0 @@
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-
-#include <sys/time.h>
-
-#include "error.h"
-#include "pervasive.h"
-#include "axis.h"
-#include "config.h"
-
-#ifndef RELABSD_OPTION_MAX_SIZE
-   #define RELABSD_OPTION_MAX_SIZE 64
-#endif
-/*
- * "errno is never set to zero by any system call or library function."
- * This file makes use of this, by setting it to zero and checking if
- * it was modified after calling an function (I'm guessing this is common
- * practice, but I think it's worth explaining).
- * Following the principle of least astonishment, if a function sets errno to
- * zero, it will not return before setting it back either to its previous
- * value or to a arbitrary nonzero value.
- */
-
-/*
- * Returns -1 on (fatal) error,
- *          0 on EOF,
- *          1 on newline.
- */
-static int reach_next_line_or_eof (FILE * const f)
-{
-   int prev_errno;
-   char c;
-
-   prev_errno = errno;
-
-   errno = 0;
-
-   c = (char) getc(f);
-
-   while ((c != '\n') && c != EOF)
-   {
-      c = (char) getc(f);
-   }
-
-   if (errno != 0)
-   {
-      RELABSD_FATAL
-      (
-         "[CONFIG] Error while attempting to reach EOF or next line: %s.",
-         strerror(errno)
-      );
-
-      errno = prev_errno;
-
-      return -1;
-   }
-
-   errno = prev_errno;
-
-   if (c == EOF)
-   {
-      return 0;
-   }
-
-   return 1;
-}
-
-/*
- * Returns -1 if the option was discarded (an error has been reported),
- *         0 if the option was successfully parsed.
- *
- * ('length' - 1) is the number of relevant characters in 'name'.
- * 'name' must support 'length' characters.
- * name[length] will be set to \0, so it does not need to be when calling
- * this function.
- */
-static int parse_option
-(
-   struct relabsd_config * const conf,
-   enum relabsd_axis const axis,
-   char * const name,
-   int const length
-)
-{
-   name[length] = '\0';
-
-   if (strcmp(name, "direct") == 0)
-   {
-      conf->axis[axis].option[RELABSD_DIRECT_OPTION] = 1;
-
-      RELABSD_DEBUG
-      (
-         RELABSD_DEBUG_CONFIG,
-         "Axis '%s' enabled option 'direct'.",
-         relabsd_axis_to_name(axis)
-      );
-
-      if (conf->axis[axis].option[RELABSD_FRAMED_OPTION])
-      {
-         RELABSD_WARNING
-         (
-            "[CONFIG] Axis '%s': using option 'direct' discards option"
-            "'framed'.",
-            relabsd_axis_to_name(axis)
-         );
-      }
-   }
-   else if (strcmp(name, "real_fuzz") == 0)
-   {
-      conf->axis[axis].option[RELABSD_REAL_FUZZ_OPTION] = 1;
-
-      RELABSD_DEBUG
-      (
-         RELABSD_DEBUG_CONFIG,
-         "Axis '%s' enabled option 'real_fuzz'.",
-         relabsd_axis_to_name(axis)
-      );
-   }
-   else if (strcmp(name, "framed") == 0)
-   {
-      conf->axis[axis].option[RELABSD_FRAMED_OPTION] = 1;
-
-      RELABSD_DEBUG
-      (
-         RELABSD_DEBUG_CONFIG,
-         "Axis '%s' enabled option 'framed'.",
-         relabsd_axis_to_name(axis)
-      );
-
-      if (conf->axis[axis].option[RELABSD_DIRECT_OPTION])
-      {
-         RELABSD_WARNING
-         (
-            "[CONFIG] Axis '%s': using option 'direct' discards option"
-            "'framed'.",
-            relabsd_axis_to_name(axis)
-         );
-      }
-   }
-   else
-   {
-      RELABSD_ERROR
-      (
-         "[CONFIG] Unknown option '%s' for axis '%s'.",
-         name,
-         relabsd_axis_to_name(axis)
-      );
-
-      return -1;
-   }
-
-   return 0;
-}
-
-/*
- * Returns -1 on error,
- *          0 on EOF,
- *          1 on newline.
- */
-static int read_axis_options
-(
-   struct relabsd_config * const conf,
-   FILE * const f,
-   enum relabsd_axis const axis
-)
-{
-   char option[(RELABSD_OPTION_MAX_SIZE + 1)];
-   int i, prev_errno;
-   char c;
-
-   option[RELABSD_OPTION_MAX_SIZE] = '\0';
-
-   prev_errno = errno;
-
-   errno = 0;
-
-   memset(conf->axis[axis].option, 0, RELABSD_OPTIONS_COUNT * sizeof(int));
-
-   i = 0;
-
-   while (i <= RELABSD_OPTION_MAX_SIZE)
-   {
-      c = (char) getc(f);
-
-      if ((errno != 0) && (c == EOF))
-      {
-         RELABSD_FATAL
-         (
-            "[CONFIG] Reading error while parsing option name (axis '%s'): %s.",
-            relabsd_axis_to_name(axis),
-            strerror(errno)
-         );
-
-         errno = prev_errno;
-
-         return -1;
-      }
-
-      switch (c)
-      {
-         case ' ':
-         case '\t':
-            break;
-
-         case ',':
-            /* We parsed a new option and there is a least another. */
-            parse_option(conf, axis, option, i);
-
-            i = 0;
-
-            break;
-
-         case '\n':
-            parse_option(conf, axis, option, i);
-            errno = prev_errno;
-
-            return 1;
-
-         case EOF:
-            parse_option(conf, axis, option, i);
-            errno = prev_errno;
-
-            return 0;
-
-         default:
-            option[i] = c;
-            i++;
-
-            break;
-      }
-   }
-
-   RELABSD_FATAL
-   (
-      "[CONFIG] Option name '%s[...]' (axis '%s') is too long (%d chars max).",
-      option,
-      relabsd_axis_to_name(axis),
-      RELABSD_OPTION_MAX_SIZE
-   );
-
-   return -1;
-}
-
-static int parse_timeout_option
-(
-   struct relabsd_config * const conf,
-   const char * const param
-)
-{
-   int timeout_msec;
-   const int prev_errno = errno;
-
-   conf->enable_timeout = 1;
-
-   errno = 0;
-
-   timeout_msec = atoi(param);
-
-   if (timeout_msec <= 0)
-   {
-      RELABSD_FATAL
-      (
-         "Illegal value for timeout \"%d\": accepted range is [1, %d].",
-         timeout_msec,
-         INT_MAX
-      );
-
-      return -1;
-   }
-
-   memset((void *) &(conf->timeout), 0, sizeof(struct timeval));
-
-   conf->timeout.tv_sec = (time_t) (timeout_msec / 1000);
-
-   conf->timeout.tv_usec =
-      (
-         ((suseconds_t) timeout_msec)
-         * ((suseconds_t) 1000)
-      );
-
-   return 0;
-}
-
-/*
- * Returns -1 on (fatal) error,
- *          0 on succes.
- */
-static int parse_axis_configuration_line
-(
-   struct relabsd_config * const conf,
-   FILE * const f,
-   const char * const buffer
-)
-{
-   int valc, prev_errno;
-   enum relabsd_axis axis;
-
-   axis = relabsd_axis_from_name(buffer);
-
-   if (axis == RELABSD_UNKNOWN)
-   {
-      RELABSD_FATAL
-      (
-         "[CONFIG] Unknown axis '%s'.",
-         buffer
-      );
-
-      return -1;
-   }
-
-   prev_errno = errno;
-   errno = 0;
-
-   valc =
-   fscanf
-   (
-      f,
-      "%d %d %d %d %d",
-      &(conf->axis[axis].min),
-      &(conf->axis[axis].max),
-      &(conf->axis[axis].fuzz),
-      &(conf->axis[axis].flat),
-      &(conf->axis[axis].resolution)
-   );
-
-   if (valc == EOF)
-   {
-      if (errno == 0)
-      {
-         RELABSD_FATAL
-         (
-            "[CONFIG] Unexpected end of file while reading axis '%s'.",
-            buffer
-         );
-      }
-      else
-      {
-         RELABSD_FATAL
-         (
-            "[CONFIG] An error occured while reading axis '%s': %s.",
-            buffer,
-            strerror(errno)
-         );
-      }
-
-      errno = prev_errno;
-
-      return -1;
-   }
-   else if (valc < 5)
-   {
-      RELABSD_FATAL
-      (
-         "[CONFIG] Invalid parameter count for axis '%s'.",
-         buffer
-      );
-
-      errno = prev_errno;
-
-      return -1;
-   }
-
-   RELABSD_DEBUG
-   (
-      RELABSD_DEBUG_CONFIG,
-      "Axis '%s': {min = %d; max = %d; fuzz = %d; flat = %d; resolution = %d}",
-      buffer,
-      conf->axis[axis].min,
-      conf->axis[axis].max,
-      conf->axis[axis].fuzz,
-      conf->axis[axis].flat,
-      conf->axis[axis].resolution
-   );
-
-   errno = prev_errno;
-
-   conf->axis[axis].enabled = 1;
-   conf->axis[axis].previous_value = 0;
-
-   return read_axis_options(conf, f, axis);
-}
-
-/*
- * Returns -1 on (fatal) error,
- *          0 on EOF,
- *          1 on newline.
- */
-static int read_config_line
-(
-   struct relabsd_config * const conf,
-   FILE * const f,
-   const char * const prefix
-)
-{
-   if (!RELABSD_IS_PREFIX("#", prefix))
-   {
-      return parse_axis_configuration_line(conf, f, prefix);
-   }
-
-   return reach_next_line_or_eof(f);
-}
-
-/*
- * Returns -1 on (fatal) error,
- *         0 on success.
- */
-static int read_config_file
-(
-   struct relabsd_config * const conf,
-   char * const filename
-)
-{
-   FILE * f;
-   char buffer[(RELABSD_CONF_AXIS_CODE_SIZE + 1)];
-   int continue_reading, prev_errno;
-
-   buffer[RELABSD_CONF_AXIS_CODE_SIZE] = '\0';
-
-   f = fopen(filename, "r");
-
-   if (f == (FILE *) NULL)
-   {
-      RELABSD_FATAL
-      (
-         "[CONFIG] Could not open file: %s.",
-         strerror(errno)
-      );
-
-      return -1;
-   }
-
-
-   prev_errno = errno;
-   errno = 0;
-
-   continue_reading = 1;
-
-   while
-   (
-      (continue_reading == 1)
-      &&
-      (
-         fscanf
-         (
-            f,
-            "%" RELABSD_TO_STRING(RELABSD_CONF_AXIS_CODE_SIZE) "s",
-            buffer
-         )
-         != EOF
-      )
-   )
-   {
-      switch (read_config_line(conf, f, buffer))
-      {
-         case 1:
-            /* Everything is going well. */
-            break;
-
-         case 0:
-            /* EOF reached. */
-            continue_reading = 0;
-            break;
-
-         case -1:
-            /* A fatal error occured. */
-            errno = prev_errno;
-
-            fclose(f);
-            return -1;
-      }
-   }
-
-   if (errno != 0)
-   {
-      /* An error happened in the while loop condition. */
-      RELABSD_FATAL
-      (
-         "[CONFIG] Error while reading file: %s, last read '%s'.",
-         strerror(errno),
-         buffer
-      );
-
-      errno = prev_errno;
-
-      fclose(f);
-
-      return -1;
-   }
-
-   errno = prev_errno;
-
-   fclose(f);
-
-   return 0;
-}
-
-static void print_usage
-(
-   const char * const exec
-)
-{
-   RELABSD_FATAL
-   (
-      "USAGE: %s input_device config_file [<OPTION>+]\n"
-      "<OPTION>:\n"
-      "\t [-n | --name] <relabsd_device_name>: Names the virtual device.\n"
-      "\t [-t | --timeout] <timeout_in_ms>: Resets all enabled axes to zero"
-      " <timeout_in_ms> milliseconds after the last event. Range for"
-      " <timeout_in_ms>: [1, %d].\n"
-      "Alternatively, the previous usage is still supported:\n"
-      "\t%s input_device config_file [<relabsd_device_name>]\n"
-      "However, with that usage, <relabsd_device_name> cannot start with '-'.",
-      exec,
-      INT_MAX,
-      exec
-   );
-}
-/*
- * Returns -1 on (fatal) error,
- *          0 on valid usage.
- */
-static int check_usage
-(
-   int const argc,
-   char * const * const argv
-)
-{
-   if (argc < 3)
-   {
-      print_usage(argv[0]);
-
-      return -1;
-   }
-
-   return 0;
-}
-
-static void init_axes_config (struct relabsd_config * const conf)
-{
-   int i;
-
-   for (i = RELABSD_VALID_AXES_COUNT; i --> 0;)
-   {
-      conf->axis[i].enabled = 0;
-   }
-}
-
-static int parse_options
-(
-   struct relabsd_config * const conf,
-   int const argc,
-   char * const * const argv
-)
-{
-   int i;
-
-   if ((argc == 4) && !RELABSD_IS_PREFIX("-", argv[3]))
-   {
-      /* Old usage */
-
-      RELABSD_S_DEBUG(RELABSD_DEBUG_CONFIG, "Old usage detected.");
-
-      conf->device_name = argv[3];
-
-      RELABSD_DEBUG
-      (
-         RELABSD_DEBUG_CONFIG,
-         "Virtual device name param set to '%s'.",
-         conf->device_name
-      );
-
-      return 0;
-   }
-
-   conf->device_name = NULL;
-   conf->enable_timeout = 0;
-
-   for (i = 3; i < argc; ++i)
-   {
-      if
-      (
-         RELABSD_STRING_EQUALS("-n", argv[i])
-         || RELABSD_STRING_EQUALS("--name", argv[i])
-      )
-      {
-         i += 1;
-
-         if (i >= argc)
-         {
-            RELABSD_S_FATAL
-            (
-               "Missing value for parameter \"--name\"."
-            );
-
-            print_usage(argv[0]);
-
-            return -1;
-         }
-
-         conf->device_name = argv[i];
-      }
-      else if
-      (
-         RELABSD_STRING_EQUALS("-t", argv[i])
-         || RELABSD_STRING_EQUALS("--timeout", argv[i])
-      )
-      {
-         i += 1;
-
-         if (i >= argc)
-         {
-            RELABSD_S_FATAL
-            (
-               "Missing value for parameter \"--timeout\"."
-            );
-
-            print_usage(argv[0]);
-
-            return -1;
-         }
-
-         if (parse_timeout_option(conf, argv[i]) < 0)
-         {
-            return -1;
-         }
-      }
-      else
-      {
-         RELABSD_FATAL
-         (
-            "Unknown parameter \"%s\".",
-            argv[i]
-         );
-
-         print_usage(argv[0]);
-
-         return -1;
-      }
-   }
-
-   return 0;
-}
-int relabsd_config_parse
-(
-   struct relabsd_config * const conf,
-   int const argc,
-   char * const * const argv
-)
-{
-   RELABSD_S_DEBUG(RELABSD_DEBUG_PROGRAM_FLOW, "Parsing config & params...");
-
-   if (check_usage(argc, argv) < 0)
-   {
-      return -1;
-   }
-
-   if (parse_options(conf, argc, argv) < 0)
-   {
-      return -1;
-   }
-
-   conf->input_file = argv[1];
-
-   RELABSD_DEBUG
-   (
-      RELABSD_DEBUG_CONFIG,
-      "Using configuration file '%s'.",
-      conf->input_file
-   );
-
-   init_axes_config(conf);
-
-   if (read_config_file(conf, argv[2]) < 0)
-   {
-      return -1;
-   }
-
-   return 0;
-}
-
-static int direct_filter
-(
-   struct relabsd_config_axis * const axis,
-   int * const value
-)
-{
-   if (abs(*value - axis->previous_value) <= axis->fuzz)
-   {
-      if (axis->option[RELABSD_REAL_FUZZ_OPTION])
-      {
-         axis->previous_value = *value;
-      }
-
-      return -1;
-   }
-
-   if (*value < axis->min)
-   {
-      *value = axis->min;
-   }
-   else if (*value > axis->max)
-   {
-      *value = axis->max;
-   }
-   else if (abs(*value) <= axis->flat)
-   {
-      *value = 0;
-   }
-
-   if (*value == axis->previous_value)
-   {
-      return -1;
-   }
-
-   axis->previous_value = *value;
-
-   return 1;
-}
-
-static int rel_to_abs_filter
-(
-   struct relabsd_config_axis * const axis,
-   int * const value
-)
-{
-   long int guard;
-
-   guard = (((long int) axis->previous_value) + ((long int) *value));
-
-   if (guard < ((long int) INT_MIN))
-   {
-      guard = ((long int) INT_MIN);
-   }
-   else if (guard > ((long int) INT_MAX))
-   {
-      guard = ((long int) INT_MAX);
-   }
-
-   *value = (int) guard;
-
-   if (axis->option[RELABSD_FRAMED_OPTION])
-   {
-      if (*value < axis->min)
-      {
-         *value = axis->min;
-      }
-      else if (*value > axis->max)
-      {
-         *value = axis->max;
-      }
-
-      if (*value == axis->previous_value)
-      {
-         return 0;
-      }
-
-      axis->previous_value = *value;
-
-      return 1;
-   }
-   else
-   {
-      if (*value == axis->previous_value)
-      {
-         return 0;
-      }
-
-      axis->previous_value = *value;
-
-      if ((*value < axis->min) || (*value > axis->max))
-      {
-         return 0;
-      }
-      else
-      {
-         return 1;
-      }
-   }
-}
-
-int relabsd_config_filter
-(
-   struct relabsd_config * const conf,
-   enum relabsd_axis const axis,
-   int * const value
-)
-{
-   if ((axis == RELABSD_UNKNOWN) || !conf->axis[axis].enabled)
-   {
-      return 0;
-   }
-
-   /* TODO: handle conf->axis[axis].resolution */
-
-   if (conf->axis[axis].option[RELABSD_DIRECT_OPTION])
-   {
-      return direct_filter((conf->axis + axis), value);
-   }
-   else
-   {
-      return rel_to_abs_filter((conf->axis + axis), value);
-   }
-}
-
-void relabsd_config_get_absinfo
-(
-   const struct relabsd_config * const conf,
-   enum relabsd_axis const axis,
-   struct input_absinfo * const absinfo
-)
-{
-   absinfo->value = (__s32) 0;
-   absinfo->minimum = (__s32) conf->axis[axis].min;
-   absinfo->maximum = (__s32) conf->axis[axis].max;
-   absinfo->fuzz = (__s32) conf->axis[axis].fuzz;
-   absinfo->flat = (__s32) conf->axis[axis].flat;
-   absinfo->resolution = (__s32) conf->axis[axis].resolution;
-}