/* $Id: plugin_w1retap.c * * plugin to perform simple file operations for w1retap * * Copyright (C) 2007 Jonathan Hudson * Copyright (C) 2006 The LCD4Linux Team * * 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. * */ /* * This module returns a specific value associated with a key from a * file containing one or more lines formatted as KEY=VALUE. * * It is intended for use with the w1retap weather station logging * software , but is applicable * to any similarly formatted file. */ /* * exported functions: * * int plugin_init_file (void) * adds various functions * */ #include "config.h" #include #include #include #include #include "debug.h" #include "plugin.h" #ifdef WITH_DMALLOC #include #endif /* function 'my_readkey' */ /* takes two arguments, file name and key */ /* returns value associated with key, trimmed to suitable dec places */ static void my_readkey(RESULT * result, RESULT * arg1, RESULT * arg2) { char value[80], val2[80]; FILE *fp; char *reqkey, *pval; size_t size; *value = 0; pval = value; reqkey = R2S(arg2); fp = fopen(R2S(arg1), "r"); if (!fp) { error("w1retap couldn't open file '%s'", R2S(arg1)); value[0] = '\0'; } else { size = strlen(reqkey); while (!feof(fp) && pval == value) { fgets(val2, sizeof(val2), fp); if (*(val2 + size) == '=') { if (strncmp(val2, reqkey, size) == 0) { char *p; p = index(val2, ' '); if (p == NULL) { p = index(val2, '\n'); } if (p) { *p = 0; pval = val2 + size + 1; { double d; char *ep; d = strtod(pval, &ep); if (ep != pval && (*ep == 0 || isspace(*ep))) { if (d > 500) sprintf(val2, "%.0f", d); else sprintf(val2, "%.1f", d); pval = val2; } } } } } } fclose(fp); } /* store result */ SetResult(&result, R_STRING, pval); } /* plugin initialization */ /* MUST NOT be declared 'static'! */ int plugin_init_w1retap(void) { /* register all our cool functions */ /* the second parameter is the number of arguments */ /* -1 stands for variable argument list */ AddFunction("w1retap::readkey", 2, my_readkey); return 0; } void plugin_exit_w1retap(void) { /* free any allocated memory */ /* close filedescriptors */ } /* #Sample configuration for w1retap #================================ Display Weather { Driver 'Pertelian' Port '/dev/ttyUSB0' Size '20x4' Backlight 1 Icons 0 } Display XWindow { Driver 'X11' Size '120x32' Font '6x8' Pixel '4+1' Gap '-1x-1' Border 20 Foreground '000000ff' Background '00000033' Basecolor '70c000' Buttons 6 Brightness 133 } Widget LCDTimer { class 'Timer' active 1 update 10000 expression h=strftime('%H', time()); x=file::readline('/tmp/.lcd',1)+0; b=(h > 5 | h < 23) + x ; LCD::backlight(b) } Widget Temp { class 'Text' expression w1retap::readkey(file, 'OTMP0') prefix 'Extr ' width 10 align 'L' update tick } Widget GHouse { class 'Text' expression w1retap::readkey(file, 'GHT') prefix 'GHT ' width 10 align 'L' update tick } Widget House { class 'Text' expression w1retap::readkey(file, 'OTMP1') prefix 'Intr ' width 10 align 'L' update tick } Widget Garage { class 'Text' expression w1retap::readkey(file, 'OTMP2') prefix 'Gge ' width 10 align 'L' update tick } Widget Soil { class 'Text' expression w1retap::readkey(file, 'STMP1') prefix 'Soil ' width 10 align 'L' update tick } Widget Press { class 'Text' expression w1retap::readkey(file, 'OPRS') prefix 'Pres ' width 10 align 'L' update tick } Widget Rain { class 'Text' expression w1retap::readkey(file1, 'RAIN') prefix 'Rain ' width 20 align 'L' update tick } Layout Default { Timer1 'LCDTimer' Row1 { Col1 'Temp' Col11 'GHouse' } Row2 { Col1 'House' Col11 'Garage' } Row3 { Col1 'Soil' Col11 'Press' } Row4 { Col1 'Rain' } } Variables { tick 120000 file '/tmp/.w1retap.dat' file1 '/tmp/.w1rain.txt' } Layout 'Default' Display 'Weather' */ 77' href='#n77'>77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 
/* $Id$
 * $URL$
 *
 * plugin that forks and exec's once a key is pressed. the difference to the exec plugin is: this can also only be done once!
 *
 * Copyright (C) 2008, Wolfgang Henerbichler <wogri@wogri.com>
 *
 * 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.
 *
 */

/* 
 * exported functions:
 *
 * int plugin_init_button_exec(void)
 *  adds various functions
 *
 */


/* define the include files you need */
#include "config.h"

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>

/* these should always be included */
#include "debug.h"
#include "plugin.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif



/* sample function 'button_exec' */
/* takes as many arguments as you want, first arguemnt is the command that will be called via exec, all the following are parameters you want to add to your command - you won't know what has happened after forking - no return codes available */
/* Note: all local functions should be declared 'static' */

static void my_button_exec(RESULT * result, int argc, RESULT * argv[])
{
    int pid;
    int i;
    int errsv;
    char *args[argc + 1];
    char *arg;
    char *prog;

    signal(SIGCHLD, SIG_IGN);
    prog = R2S(argv[0]);
    info(prog);
    for (i = 1; i < argc; i++) {
	arg = R2S(argv[i]);
	args[i] = arg;
	info(arg);
    }
    args[0] = prog;
    args[i] = (char *) 0;
    pid = fork();
    if (pid == 0) {		/* child-process */
	/* char *args[] = {"-r", "-t", "-l", (char *) 0 }; */
	info("executing program");
	execvp(prog, args);
	errsv = errno;
	info("executing program failed");
	info(strerror(errsv));
	exit(0);
    } else if (pid == -1) {
	info("weird error has occurred. couldn't fork.");
    } else {
	SetResult(&result, R_STRING, "0");
    }
}


/* plugin initialization */
/* MUST NOT be declared 'static'! */
int plugin_init_button_exec(void)
{

    /* register all our cool functions */
    /* the second parameter is the number of arguments */
    /* -1 stands for variable argument list */
    AddFunction("button_exec", -1, my_button_exec);
    return 0;
}

void plugin_exit_button_exec(void)
{
    /* free any allocated memory */
    /* close filedescriptors */
}
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