nuclear@0: #include <stdio.h>
nuclear@0: #include <assert.h>
nuclear@0: #include <unistd.h>
nuclear@0: #include <pthread.h>
nuclear@0: #include <android/log.h>
nuclear@0: #include "logger.h"
nuclear@0: 
nuclear@0: static void *thread_func(void *arg);
nuclear@0: 
nuclear@0: static int pfd[2];
nuclear@0: static pthread_t thr;
nuclear@0: static int initialized;
nuclear@0: 
nuclear@0: int start_logger(void)
nuclear@0: {
nuclear@0: 	if(initialized) {
nuclear@0: 		return 1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	/* set stdout to line-buffered, and stderr to unbuffered */
nuclear@0: 	setvbuf(stdout, 0, _IOLBF, 0);
nuclear@0: 	setvbuf(stderr, 0, _IONBF, 0);
nuclear@0: 
nuclear@0: 	if(pipe(pfd) == -1) {
nuclear@0: 		perror("failed to create logging pipe");
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	assert(pfd[0] > 2 && pfd[1] > 2);
nuclear@0: 
nuclear@0: 	/* redirect stdout & stderr to the write-end of the pipe */
nuclear@0: 	dup2(pfd[1], 1);
nuclear@0: 	dup2(pfd[1], 2);
nuclear@0: 
nuclear@0: 	/* start the logging thread */
nuclear@0: 	if(pthread_create(&thr, 0, thread_func, 0) == -1) {
nuclear@0: 		perror("failed to spawn logging thread");
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	pthread_detach(thr);
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: static void *thread_func(void *arg)
nuclear@0: {
nuclear@0: 	ssize_t rdsz;
nuclear@0: 	char buf[257];
nuclear@0: 
nuclear@0: 	__android_log_print(ANDROID_LOG_DEBUG, APP_NAME, "logger starting up...");
nuclear@0: 
nuclear@0: 	while((rdsz = read(pfd[0], buf, sizeof buf - 1)) > 0) {
nuclear@0: 		if(buf[rdsz - 1] == '\n') {
nuclear@0: 			--rdsz;
nuclear@0: 		}
nuclear@0: 		buf[rdsz] = 0;
nuclear@0: 		__android_log_write(ANDROID_LOG_DEBUG, APP_NAME, buf);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	__android_log_print(ANDROID_LOG_DEBUG, APP_NAME, "logger shutting down...");
nuclear@0: 	return 0;
nuclear@0: }