dockapps/wmradio/fifo.c

159 lines
3.6 KiB
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/*
* Copyright (C) 12 Jun 2003 Tomas Cermak
*
* This file is part of wmradio program.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "fifo.h"
#include "wmradio.h"
#include<stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#define FIFO_FILE_PREFIX "/tmp/wmradio_"
FILE *fifo;
#define MAX_STRINGS 40
char *read_line(FILE *file)
{
char *str=(char *)malloc(MAX_STRINGS);
int fin=0;
int size=MAX_STRINGS;
int retries;
struct timespec pause = { 0, 100000000 };
if (fgets(str,MAX_STRINGS,file)==NULL)
{
free(str);
return NULL;
}
for(retries=3; retries; retries--) {
if(!fin) {
fin=1;
if (strchr(str,'\n')==NULL) {
char *tmp=(char *)malloc(size+MAX_STRINGS-1);
nanosleep(&pause, &pause);
strcpy(tmp,str);
fgets(tmp+size-1,MAX_STRINGS,file);
free(str);
str=tmp;
size+=MAX_STRINGS-1;
fin=0;
}
}
}
if(!fin) {
free(str);
return NULL;
}
return str;
}
char * fifo_filename() {
static char *name = NULL;
char buffer[100];
if (name == NULL) {
snprintf(buffer,sizeof(buffer),"%i",getuid());
name = malloc(sizeof(char)*strlen(buffer)+
sizeof(FIFO_FILE_PREFIX)+1);
sprintf(name, "%s%s", FIFO_FILE_PREFIX, buffer);
}
return name;
}
void fifo_init() {
int fifo_fd;
mkfifo(fifo_filename(), 0666);
fifo_fd = open(fifo_filename(), O_NONBLOCK | O_RDONLY);
fifo = fdopen(fifo_fd, "r");
}
void fifo_close() {
fclose(fifo);
unlink(fifo_filename());
}
void fifo_parse () {
char *line = read_line(fifo);
char *command;
char *rest=NULL;
if (line) {
command=(char *)malloc(strlen(line)+1);
sscanf(line,"%s",command);
rest=line+strlen(command);
if (!strcasecmp(command,"TUNE_PLUS")) {
wmradio_command(TUNE_PLUS, 0);
}
else if (!strcasecmp(command,"TUNE_MINUS"))
{
wmradio_command(TUNE_MINUS, 0);
}
if (!strcasecmp(command,"FINE_TUNE_PLUS")) {
wmradio_command(TUNE_PLUS, 1);
}
else if (!strcasecmp(command,"FINE_TUNE_MINUS"))
{
wmradio_command(TUNE_MINUS, 1);
}
else if (!strcasecmp(command,"POWER"))
{
wmradio_command(POWER_SWITCH, 0);
}
else if (!strcasecmp(command,"SET_PRESET"))
{
int i;
if (sscanf(rest,"%i",&i)==1) {
if (i>=0 && i<6)
wmradio_command(SET_PRESET, i);
}
}
else if (!strcasecmp(command,"SAVE_PRESET"))
{
int i;
if ((sscanf(rest,"%i",&i))==1) {
if (i>=0 && i<6)
wmradio_command(SAVE_PRESET, i);
}
}
else if (!strcasecmp(command,"SCAN"))
{
wmradio_command(SCAN, 0);
}
else if (!strcasecmp(command,"TUNE_NAME_PREV"))
{
wmradio_command(TUNE_NAME_PREV, 0);
}
else if (!strcasecmp(command,"TUNE_NAME_NEXT"))
{
wmradio_command(TUNE_NAME_NEXT, 0);
}
else if (!strcasecmp(command,"READ_CONFIG"))
{
wmradio_command(READ_CONFIG, 0);
}
free(command);
free(line);
}
}