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/* horst - Highly Optimized Radio Scanning Tool
*
* Copyright (C) 2005-2014 Bruno Randolf (br1@einfach.org)
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <err.h>
#include "main.h"
#include "channel.h"
#include "control.h"
#define MAX_CMD 255
/* FIFO (named pipe) */
int ctlpipe = -1;
void
control_init_pipe(void)
{
mkfifo(conf.control_pipe, 0666);
ctlpipe = open(conf.control_pipe, O_RDWR|O_NONBLOCK);
}
void
control_send_command(char* cmd)
{
int len = strlen(cmd);
char new[len+1];
char* pos;
while (access(conf.control_pipe, F_OK) < 0) {
printf("Waiting for control pipe...\n");
sleep(1);
}
ctlpipe = open(conf.control_pipe, O_WRONLY);
if (ctlpipe < 0)
err(1, "Could not open control socket '%s'", conf.control_pipe);
/* always terminate command with newline */
strncpy(new, cmd, len);
new[len] = '\n';
new[len+1] = '\0';
/* replace : with newline */
while ((pos = strchr(new, ':')) != NULL) {
*pos = '\n';
}
printf("Sending command: %s\n", new);
write(ctlpipe, new, len+1);
close(ctlpipe);
}
static void
parse_command(char* in) {
char* cmd;
char* val;
int n;
cmd = strsep(&in, "=");
val = in;
//printlog("RECV CMD %s VAL %s", cmd, val);
/* commands without value */
if (strcmp(cmd, "pause") == 0) {
main_pause(1);
}
else if (strcmp(cmd, "resume") == 0) {
main_pause(0);
}
/* all other commands require a value */
if (val == NULL)
return;
else if (strcmp(cmd, "channel") == 0) {
n = atoi(val);
printlog("- CHANNEL = %d", n);
conf.do_change_channel = 0;
channel_change(channel_find_index_from_chan(n));
}
else if (strcmp(cmd, "channel_auto") == 0) {
n = (strcmp(val, "1") == 0);
printlog("- CHANNEL AUTO = %d", n);
conf.do_change_channel = n;
}
else if (strcmp(cmd, "channel_dwell") == 0) {
n = atoi(val);
printlog("- CHANNEL DWELL = %d", n);
conf.channel_time = n*1000;
}
else if (strcmp(cmd, "channel_upper") == 0) {
n = atoi(val);
printlog("- CHANNEL MAX = %d", n);
conf.channel_max = n;
}
else if (strcmp(cmd, "outfile") == 0) {
dumpfile_open(val);
}
}
void
control_receive_command(void) {
char buf[MAX_CMD];
char *pos = buf;
char *end;
int len;
len = read(ctlpipe, buf, MAX_CMD);
if (len > 0) {
buf[len] = '\0';
/* we can receive multiple \n separated commands */
while ((end = strchr(pos, '\n')) != NULL) {
*end = '\0';
parse_command(pos);
pos = end + 1;
}
}
}
void
control_finish(void)
{
if (ctlpipe == -1)
return;
close(ctlpipe);
unlink(conf.control_pipe);
ctlpipe = -1;
}
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