/* $Id$
 * $URL$
 *
 * plugin template
 *
 * Copyright (C) 2008 Michael Vogt <michu@neophob.com>
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.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.
 *
 */

/* 
 * Quick fifo hack for lcd4linux
 * 
 * most code is ripped ...
 *
 */

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

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>

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

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

#define FIFO_BUFFER_SIZE 80

typedef struct _FifoData {
    char *path;
    int input;
    int created;
} FifoData;

static char Section[] = "Plugin:FIFO";
static FifoData fd;
static char msg[FIFO_BUFFER_SIZE];
static char fifopath[1024];


static void configure_fifo(void)
{
    char *s;
    s = cfg_get(Section, "fifopath", "/tmp/lcd4linux.fifo");
    if (*s == '\0') {
	info("[FIFO] empty '%s.fifopath' entry from %s, assuming '/tmp/lcd4linux.fifo'", Section, cfg_source());
	strcpy(fifopath, "/tmp/lcd4linux.fifo");
    } else
	strcpy(fifopath, s);
    free(s);
}


static void removeFifo()
{
    debug("Removing FIFO \"%s\"\n", fd.path);
    if (unlink(fd.path) < 0) {
	error("Could not remove FIFO \"%s\": %s\n", fd.path, strerror(errno));
	return;
    }
    fd.created = 0;
}


static void closeFifo()
{
    struct stat st;
    if (fd.input >= 0) {
	close(fd.input);
	fd.input = -1;
    }
    if (fd.created && (stat(fd.path, &st) == 0))
	removeFifo(fd);
}

static int makeFifo()
{
    if (mkfifo(fd.path, 0666) < 0) {
	error("Couldn't create FIFO \"%s\": %s\n", fd.path, strerror(errno));
	return -1;
    }
    fd.created = 1;
    return 0;
}


static int checkFifo()
{
    struct stat st;
    if (stat(fd.path, &st) < 0) {
	if (errno == ENOENT) {

	    /* Path doesn't exist */
	    return makeFifo(fd);
	}
	error("Failed to stat FIFO \"%s\": %s\n", fd.path, strerror(errno));
	return -1;
    }
    if (!S_ISFIFO(st.st_mode)) {
	error("\"%s\" already exists, but is not a FIFO\n", fd.path);
	return -1;
    }
    return 0;
}


static int openFifo()
{
    if (checkFifo() < 0)
	return -1;
    fd.input = open(fd.path, O_RDONLY | O_NONBLOCK);
    if (fd.input < 0) {
	error("Could not open FIFO \"%s\" for reading: %s\n", fd.path, strerror(errno));
	closeFifo();
	return -1;
    }
    return 0;
}


static void fiforead(RESULT * result)
{
    char buf[FIFO_BUFFER_SIZE];
    int i, bytes = 1;
    memset(buf, 0, FIFO_BUFFER_SIZE);
    strcat(buf, "ERROR");
    if (checkFifo() == 0) {
	memset(buf, 0, FIFO_BUFFER_SIZE);
	while (bytes > 0 && errno != EINTR)
	    bytes = read(fd.input, buf, FIFO_BUFFER_SIZE);
	if (bytes < 0) {
	    error("[FIFO] Error %i: %s\n", errno, strerror(errno));
	} else {
	    if (strlen(buf) > 0) {
		strcpy(msg, buf);
	    }
	    for (i = 0; i < strlen(buf); i++) {
		if (msg[i] < 0x20)
		    msg[i] = ' ';
	    }
	}
    }

    /* store result */
    SetResult(&result, R_STRING, msg);
}


/* plugin initialization */
int plugin_init_fifo(void)
{
    configure_fifo();
    fd.path = fifopath;
    fd.input = -1;
    fd.created = 0;
    if (openFifo() < 0) {
	return -1;
    }
    memset(msg, 0, FIFO_BUFFER_SIZE);
    AddFunction("fifo::read", 0, fiforead);
    return 0;
}


void plugin_exit_fifo(void)
{

    /* close filedescriptors */
    closeFifo();
}
.cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span># US NY state

#A 183000000 8VSB
#A 515000000 8VSB
#A 545000000 8VSB
#A 551000000 8VSB
A 575000000 8VSB
A 581000000 8VSB
A 593000000 8VSB
#A 641000000 8VSB
A 647000000 8VSB
A 713000000 8VSB
#A 719000000 8VSB
A 773000000 8VSB
A 785000000 8VSB
A 791000000 8VSB
</pre></div>
</code></pre></td></tr></table>
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