mirror of
https://github.com/netfun2000/lcd4linux.git
synced 2026-02-27 09:44:34 +08:00
clean up
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@871 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
michux
+193
-176
@@ -1,180 +1,197 @@
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/* $Id$
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* $URL$
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*
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* plugin template
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*
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* Copyright (C) 2008 Michael Vogt <michu@neophob.com>
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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* Quick fifo hack for lcd4linux
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*
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* most code is ripped ...
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*
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*/
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/* define the include files you need */
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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/* these should always be included */
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#include "debug.h"
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#include "plugin.h"
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#include "cfg.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*
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*/
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#define FIFO_BUFFER_SIZE 80
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typedef struct _FifoData {
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char *path;
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int input;
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int created;
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} FifoData;
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static char Section[] = "Plugin:FIFO";
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static FifoData fd;
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static char msg[FIFO_BUFFER_SIZE];
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static char fifopath[1024];
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static void configure_fifo(void)
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{
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char *s;
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s = cfg_get(Section, "fifopath", "/tmp/lcd4linux.fifo");
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if (*s == '\0') {
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info("[FIFO] empty '%s.fifopath' entry from %s, assuming '/tmp/lcd4linux.fifo'", Section, cfg_source());
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strcpy(fifopath, "/tmp/lcd4linux.fifo");
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} else
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strcpy(fifopath, s);
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free(s);
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}
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static void removeFifo()
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{
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debug("Removing FIFO \"%s\"\n", fd.path);
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if (unlink(fd.path) < 0) {
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error("Could not remove FIFO \"%s\": %s\n", fd.path, strerror(errno));
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return;
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}
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fd.created = 0;
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}
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static void closeFifo()
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{
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struct stat st;
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if (fd.input >= 0) {
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close(fd.input);
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fd.input = -1;
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}
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if (fd.created && (stat(fd.path, &st) == 0))
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removeFifo(fd);
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}
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static int makeFifo()
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{
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if (mkfifo(fd.path, 0666) < 0) {
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error("Couldn't create FIFO \"%s\": %s\n", fd.path, strerror(errno));
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return -1;
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}
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fd.created = 1;
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/* $Id$
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* $URL$
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*
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* plugin template
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*
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* Copyright (C) 2008 Michael Vogt <michu@neophob.com>
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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return 0;
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/*
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* Quick fifo hack for lcd4linux
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*
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* most code is ripped ...
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*
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*/
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/* define the include files you need */
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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/* these should always be included */
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#include "debug.h"
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#include "plugin.h"
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#include "cfg.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif
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#define FIFO_BUFFER_SIZE 80
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typedef struct _FifoData {
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char *path;
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int input;
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int created;
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} FifoData;
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static char Section[] = "Plugin:FIFO";
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static FifoData fd;
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static char msg[FIFO_BUFFER_SIZE];
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static char fifopath[1024];
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static void configure_fifo(void)
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{
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static int checkFifo()
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{
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struct stat st;
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if (stat(fd.path, &st) < 0) {
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if (errno == ENOENT) {
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char *s;
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s = cfg_get(Section, "fifopath", "/tmp/lcd4linux.fifo");
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if (*s == '\0') {
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info("[FIFO] empty '%s.fifopath' entry from %s, assuming '/tmp/lcd4linux.fifo'", Section, cfg_source());
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strcpy(fifopath, "/tmp/lcd4linux.fifo");
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} else
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strcpy(fifopath, s);
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free(s);
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}
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static void removeFifo()
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{
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return makeFifo(fd);
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debug("Removing FIFO \"%s\"\n", fd.path);
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if (unlink(fd.path) < 0) {
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error("Could not remove FIFO \"%s\": %s\n", fd.path, strerror(errno));
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return;
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}
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fd.created = 0;
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}
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static void closeFifo()
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{
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struct stat st;
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if (fd.input >= 0) {
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close(fd.input);
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fd.input = -1;
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}
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if (fd.created && (stat(fd.path, &st) == 0))
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removeFifo(fd);
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}
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static int makeFifo()
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{
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if (mkfifo(fd.path, 0666) < 0) {
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error("Couldn't create FIFO \"%s\": %s\n", fd.path, strerror(errno));
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return -1;
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}
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fd.created = 1;
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return 0;
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}
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static int checkFifo()
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{
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struct stat st;
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if (stat(fd.path, &st) < 0) {
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if (errno == ENOENT) {
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/* Path doesn't exist */
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return makeFifo(fd);
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}
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error("Failed to stat FIFO \"%s\": %s\n", fd.path, strerror(errno));
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return -1;
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}
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if (!S_ISFIFO(st.st_mode)) {
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error("\"%s\" already exists, but is not a FIFO\n", fd.path);
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return -1;
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}
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return 0;
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}
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static int openFifo()
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{
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if (checkFifo() < 0)
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return -1;
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fd.input = open(fd.path, O_RDONLY | O_NONBLOCK);
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if (fd.input < 0) {
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error("Could not open FIFO \"%s\" for reading: %s\n", fd.path, strerror(errno));
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closeFifo();
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return -1;
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}
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return 0;
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}
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static void fiforead(RESULT * result)
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{
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char buf[FIFO_BUFFER_SIZE];
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int i, bytes = 1;
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memset(buf, 0, FIFO_BUFFER_SIZE);
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strcat(buf, "ERROR");
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if (checkFifo() == 0) {
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memset(buf, 0, FIFO_BUFFER_SIZE);
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while (bytes > 0 && errno != EINTR)
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bytes = read(fd.input, buf, FIFO_BUFFER_SIZE);
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if (bytes < 0) {
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error("[FIFO] Error %i: %s\n", errno, strerror(errno));
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} else {
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if (strlen(buf) > 0) {
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strcpy(msg, buf);
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}
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for (i = 0; i < strlen(buf); i++) {
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if (msg[i] < 0x20)
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msg[i] = ' ';
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}
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}
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}
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/* store result */
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SetResult(&result, R_STRING, msg);
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}
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/* plugin initialization */
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int plugin_init_fifo(void)
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{
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configure_fifo();
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fd.path = fifopath;
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fd.input = -1;
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fd.created = 0;
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if (openFifo() < 0) {
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return -1;
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}
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memset(msg, 0, FIFO_BUFFER_SIZE);
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AddFunction("fifo::read", 0, fiforead);
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return 0;
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}
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void plugin_exit_fifo(void)
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{
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/* close filedescriptors */
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closeFifo();
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}
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