archived-lcd4linux/plugin_seti.c

/* $Id: plugin_seti.c,v 1.2 2004/03/13 19:06:01 reinelt Exp $
 *
 * plugin for seti@home status reporting
 *
 * Copyright 2004 Michael Reinelt <reinelt@eunet.at>
 * Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * based on the old seti client which is 
 * Copyright 2001 Axel Ehnert <axel@ehnert.net>
 *
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * $Log: plugin_seti.c,v $
 * Revision 1.2  2004/03/13 19:06:01  reinelt
 * ChangeLog and Status update; small glitch in plugin_seti fixed.
 *
 * Revision 1.1  2004/03/13 06:49:20  reinelt
 * seti@home plugin ported to NextGeneration
 *
 */

/* 
 * exported functions:
 *
 * int plugin_init_seti (void)
 *  adds functions to access /seti/state.sah
 *
 */


#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include "debug.h"
#include "plugin.h"
#include "hash.h"
#include "cfg.h"

#define SECTION   "Plugin:Seti"
#define DIRKEY    "Directory"
#define STATEFILE "state.sah"

static HASH SETI = { 0, };
static int fatal = 0;

static int parse_seti (void)
{
  static char fn[256] = "";
  FILE *stream;
  int age;
  
  // if a fatal error occured, do nothing
  if (fatal != 0) return -1;
  
  // reread every 100 msec only
  age=hash_age(&SETI, NULL, NULL);
  if (age>0 && age<=100) return 0;
  
  if (fn[0] == '\0') {
    char *dir = cfg_get (SECTION, DIRKEY, NULL);
    if (dir == NULL || *dir == '\0') {
      error ("no '%s.%s' entry from %s\n", SECTION, DIRKEY, cfg_source());
      fatal = 1;
      return -1;
    }
    if (strlen(dir) > sizeof(fn)-sizeof(STATEFILE)-2) {
      error ("entry '%s.%s' too long from %s!\n", SECTION, DIRKEY, cfg_source());
      fatal = 1;
      free (dir);
      return -1;
    }
    strcpy (fn, dir);
    if (fn[strlen(fn)-1]!='/')
      strcat (fn, "/");
    strcat (fn, STATEFILE);
    free (dir);
  }
  
  stream = fopen(fn, "r");
  if (stream == NULL) {
    error ("fopen(%s) failed: %s", fn, strerror(errno));
    return -1;
  }
  
  while (!feof(stream)) {
    char buffer[256];
    char *c, *key, *val;
    fgets (buffer, sizeof(buffer), stream);
    c=strchr(buffer, '=');
    if (c==NULL) continue;
    key=buffer; val=c+1;
    // strip leading blanks from key
    while (isspace(*key)) *key++='\0';
    // strip trailing blanks from key
    do *c='\0'; while (isspace(*--c));
    // strip leading blanks from value
    while (isspace(*val)) *val++='\0';
    // strip trailing blanks from value
    for (c=val; *c!='\0';c++);
    while (isspace(*--c)) *c='\0';
    // add entry to hash table
    hash_set (&SETI, key, val);
  }
  
  fclose (stream);
  
  return 0;
} 


static void my_seti (RESULT *result, RESULT *arg1)
{
  char *key, *val;
  
  if (parse_seti()<0) {
    SetResult(&result, R_STRING, ""); 
    return;
  }
  
  key=R2S(arg1);
  val=hash_get(&SETI, key);
  if (val==NULL) val="";
  
  SetResult(&result, R_STRING, val); 
}


int plugin_init_seti (void)
{
  AddFunction ("seti", 1, my_seti);
  return 0;
}


void plugin_exit_seti(void) 
{
  hash_destroy(&SETI);
}