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authormichux <michux@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2008-04-10 14:45:45 +0000
committermichux <michux@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2008-04-10 14:45:45 +0000
commit5228b499ae2aaf77a7203a33a6a3216854fbe479 (patch)
tree2aa738002e15fcfbd973f639388eb1264ce6e1e7
parente52b948730d08edbe20fee98b8ac860d620c467b (diff)
downloadlcd4linux-5228b499ae2aaf77a7203a33a6a3216854fbe479.tar.gz
Add basic FIFO plugin
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@869 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
-rw-r--r--Makefile.am1
-rw-r--r--plugin.c8
-rw-r--r--plugin_fifo.c180
-rw-r--r--plugins.m48
4 files changed, 197 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index dd1880d..54ce1f9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -114,6 +114,7 @@ plugin_cpuinfo.c \
plugin_diskstats.c \
plugin_dvb.c \
plugin_exec.c \
+plugin_fifo.c \
plugin_file.c \
plugin_gps.c \
plugin_i2c_sensors.c \
diff --git a/plugin.c b/plugin.c
index 3581229..66966ae 100644
--- a/plugin.c
+++ b/plugin.c
@@ -68,6 +68,8 @@ int plugin_init_dvb(void);
void plugin_exit_dvb(void);
int plugin_init_exec(void);
void plugin_exit_exec(void);
+int plugin_init_fifo(void);
+void plugin_exit_fifo(void);
int plugin_init_file(void);
void plugin_exit_file(void);
int plugin_init_gps(void);
@@ -144,6 +146,9 @@ int plugin_init(void)
#ifdef PLUGIN_EXEC
plugin_init_exec();
#endif
+#ifdef PLUGIN_FIFO
+ plugin_init_fifo();
+#endif
#ifdef PLUGIN_FILE
plugin_init_file();
#endif
@@ -242,6 +247,9 @@ void plugin_exit(void)
#ifdef PLUGIN_EXEC
plugin_exit_exec();
#endif
+#ifdef PLUGIN_FIFO
+ plugin_exit_fifo();
+#endif
#ifdef PLUGIN_FILE
plugin_exit_file();
#endif
diff --git a/plugin_fifo.c b/plugin_fifo.c
new file mode 100644
index 0000000..12a9374
--- /dev/null
+++ b/plugin_fifo.c
@@ -0,0 +1,180 @@
+/* $Id$
+ * $URL$
+ *
+ * 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();
+ }
diff --git a/plugins.m4 b/plugins.m4
index f2ddf2c..da13c1b 100644
--- a/plugins.m4
+++ b/plugins.m4
@@ -60,6 +60,7 @@ for plugin in $plugins; do
PLUGIN_DISKSTATS="yes"
PLUGIN_DVB="yes"
PLUGIN_EXEC="yes"
+ PLUGIN_FIFO="yes"
PLUGIN_FILE="yes"
PLUGIN_GPS="yes"
PLUGIN_I2C_SENSORS="yes"
@@ -105,6 +106,9 @@ for plugin in $plugins; do
exec)
PLUGIN_EXEC=$val
;;
+ fifo)
+ PLUGIN_FIFO=$val
+ ;;
file)
PLUGIN_FILE=$val
;;
@@ -219,6 +223,10 @@ if test "$PLUGIN_FILE" = "yes"; then
PLUGINS="$PLUGINS plugin_file.o"
AC_DEFINE(PLUGIN_FILE,1,[file plugin])
fi
+if test "$PLUGIN_FIFO" = "yes"; then
+ PLUGINS="$PLUGINS plugin_fifo.o"
+ AC_DEFINE(PLUGIN_FIFO,1,[fifo plugin])
+fi
if test "$PLUGIN_GPS" = "yes"; then
AC_CHECK_HEADERS(nmeap.h, [has_nmeap_header="true"], [has_nmeap_header="false"])
if test "$has_nmeap_header" = "true"; then