daemon.c File Reference

Daemon implementation. More...

#include <sys/syslog.h>
#include <stdio.h>
#include <sys/socket.h>
#include <mqueue.h>
#include <sys/types.h>
#include <resolv.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <signal.h>
#include <sys/time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/shm.h>
#include "../inc/microphone.h"

Include dependency graph for daemon.c:

Go to the source code of this file.

Macros
#define	detectCryingPrio   3
#define	watchFlagPrio   2
#define	MSGQOBJ_NAME   "/mqLocalDaemon"
#define	SHMEMOBJ_NAME   "/shLocalDaemon"

Functions
void	initThread (int priority, pthread_attr_t *pthread_attr, struct sched_param *pthread_param)
	Initializes the thread parameters with defined priority. More...
void	checkErrors (int status)
	Check for errors upon creating threads. More...
static void	signalHandler (int signo)
	Process signal handler. More...
void *	tDetectCrying (void *local_pid)
	Detects crying from microphone. More...
void *	tWatchStreamFlag (void *arg)
	Watches message queue for any changes in livestream flag. More...
int	main (int argc, char *args[])

Variables
mqd_t	msgq_id
_Bool	isStreamActive = 0

Detailed Description

Daemon implementation.

Author

José Carvalho, João Carneiro

Date

2022-01-13

Copyright

Copyright (c) 2022

Definition in file daemon.c.

Macro Definition Documentation

detectCryingPrio

#define detectCryingPrio   3

tDetectCrying priority

Definition at line 30 of file daemon.c.

MSGQOBJ_NAME

#define MSGQOBJ_NAME   "/mqLocalDaemon"

Message queue name

Definition at line 33 of file daemon.c.

SHMEMOBJ_NAME

#define SHMEMOBJ_NAME   "/shLocalDaemon"

Shared memory name

Definition at line 34 of file daemon.c.

watchFlagPrio

#define watchFlagPrio   2

tWatchFlag priority

Definition at line 31 of file daemon.c.

Function Documentation

checkErrors()

void checkErrors

(

int

status

)

Check for errors upon creating threads.

Parameters

status

: Value returned from functions

Definition at line 289 of file daemon.c.

initThread()

void initThread	(	int	priority,
		pthread_attr_t *	pthread_attr,
		struct sched_param *	pthread_param
	)

Initializes the thread parameters with defined priority.

Parameters

priority	Thread priority
pthread_attr	Thread attributes structure
pthread_param	Thread parameters structure

Definition at line 274 of file daemon.c.

main()

int main	(	int	argc,
		char *	args[]
	)

Definition at line 162 of file daemon.c.

signalHandler()

static void signalHandler ( int  signo )

static

Process signal handler.

Parameters

signo

: Signal received

Definition at line 61 of file daemon.c.

tDetectCrying()

void * tDetectCrying

(

void *

local_pid

)

Detects crying from microphone.

Parameters

local_pid

: Local process ID

Definition at line 76 of file daemon.c.

tWatchStreamFlag()

void * tWatchStreamFlag

(

void *

arg

)

Watches message queue for any changes in livestream flag.

Definition at line 123 of file daemon.c.

Variable Documentation

isStreamActive

_Bool isStreamActive = 0

Defines if livestream is active in main process

Definition at line 38 of file daemon.c.

msgq_id

mqd_t msgq_id

Message queue ID

Definition at line 36 of file daemon.c.