diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3a01e0f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+piam
+pidcf77
+pifm
+pifsq
+pissb
+pisstv
+rpitx
+*.o
diff --git a/am/piam.c b/am/piam.c
index 2a5d4e1..d1438ab 100644
--- a/am/piam.c
+++ b/am/piam.c
@@ -32,7 +32,9 @@ typedef struct {
 	RfSample.Frequency=Frequency;
 	RfSample.WaitForThisSample=Timing; //en 100 de nanosecond
 	//printf("Freq =%f Timing=%d\n",RfSample.Frequency,RfSample.WaitForThisSample);
-	write(FileFreqTiming,&RfSample,sizeof(samplerf_t));
+	if (write(FileFreqTiming,&RfSample,sizeof(samplerf_t)) != sizeof(samplerf_t)) {
+		fprintf(stderr, "Unable to write sample\n");
+	}
 
 }
 
@@ -72,7 +74,7 @@ int main(int argc, char **argv) {
 		return 1 ;
 	}
  
-	FileFreqTiming = open(outfilename,'r');
+	FileFreqTiming = open(outfilename, O_RDONLY);
     
 		
 	/** **/
diff --git a/dcf77/pidcf77.c b/dcf77/pidcf77.c
index d4a7c38..1abec8b 100644
--- a/dcf77/pidcf77.c
+++ b/dcf77/pidcf77.c
@@ -237,7 +237,9 @@ void playtone(double Amplitude,uint32_t Timing)
 	RfSample.Amplitude=Amplitude;
 	RfSample.WaitForThisSample=Timing; //en 100 de nanosecond
 	printf("%f %ld\n",Amplitude,Timing);
-	write(FileFreqTiming,&RfSample,sizeof(samplerf_t));
+	if (write(FileFreqTiming,&RfSample,sizeof(samplerf_t)) != sizeof(samplerf_t)) {
+		fprintf(stderr, "Unable to write sample\n");
+	}
 
 }
 
@@ -251,7 +253,7 @@ if (argc > 1) {
 		
 		
 		char *sFileFreqTiming=(char *)argv[1];
-	       	FileFreqTiming = open(argv[1],O_WRONLY|O_CREAT);
+	       	FileFreqTiming = open(argv[1], O_WRONLY|O_CREAT, 0644);
 		
 		DCF_BITS(7,59);
 		loop();
diff --git a/fm/pifm.c b/fm/pifm.c
index 1f1b938..3dacb63 100644
--- a/fm/pifm.c
+++ b/fm/pifm.c
@@ -32,7 +32,9 @@ typedef struct {
 	RfSample.Frequency=Frequency;
 	RfSample.WaitForThisSample=Timing; //en 100 de nanosecond
 	//printf("Freq =%f Timing=%d\n",RfSample.Frequency,RfSample.WaitForThisSample);
-	write(FileFreqTiming,&RfSample,sizeof(samplerf_t));
+	if (write(FileFreqTiming,&RfSample,sizeof(samplerf_t)) != sizeof(samplerf_t)) {
+		fprintf(stderr, "Unable to write sample\n");
+	}
 
 }
 
@@ -72,7 +74,7 @@ int main(int argc, char **argv) {
 		return 1 ;
 	}
  
-	FileFreqTiming = open(outfilename,'r');
+	FileFreqTiming = open(outfilename, O_RDONLY);
     
 		
 	/** **/
diff --git a/fsq/pifsq.c b/fsq/pifsq.c
index 23ebf49..e084160 100644
--- a/fsq/pifsq.c
+++ b/fsq/pifsq.c
@@ -216,7 +216,9 @@ typedef struct {
 	RfSample.Frequency=Frequency;
 	RfSample.WaitForThisSample=Timing*1000L; //en 100 de nanosecond
 	//printf("Freq =%f Timing=%d\n",RfSample.Frequency,RfSample.WaitForThisSample);
-	write(FileFreqTiming,&RfSample,sizeof(samplerf_t));
+	if (write(FileFreqTiming,&RfSample,sizeof(samplerf_t)) != sizeof(samplerf_t)) {
+		fprintf(stderr, "Unable to write sample\n");
+	}
 
 }
 
@@ -352,10 +354,10 @@ main(int argc, char **argv)
 	if (argc > 2) {
 		
 		sText=(char *)argv[1];
-	       	//FileText = open(argv[1], 'r');
+	       	//FileText = open(argv[1], O_RDONLY);
 
 		char *sFileFreqTiming=(char *)argv[2];
-	       	FileFreqTiming = open(argv[2],O_WRONLY|O_CREAT);
+	       	FileFreqTiming = open(argv[2], O_WRONLY|O_CREAT, 0644);
 		}
 		else
 		{
diff --git a/pifm b/pifm
deleted file mode 100755
index 05e9cb6..0000000
Binary files a/pifm and /dev/null differ
diff --git a/pifsq b/pifsq
deleted file mode 100755
index 8794dfe..0000000
Binary files a/pifsq and /dev/null differ
diff --git a/pissb b/pissb
deleted file mode 100755
index 438bbfe..0000000
Binary files a/pissb and /dev/null differ
diff --git a/pisstv b/pisstv
deleted file mode 100755
index c916cfc..0000000
Binary files a/pisstv and /dev/null differ
diff --git a/src/Makefile b/src/Makefile
index f720802..3f477ac 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -40,7 +40,7 @@ LDFLAGS_Pidcf77	= -lm -lrt -lpthread
 	$(CC) $(CFLAGS_Piam) -o ../pidcf77 ../dcf77/pidcf77.c  $(LDFLAGS_Piam) 
 clean:
 	
-	rm -f  ../rpitx ../pissb ../pisstv ../pifsq ../pifm ../piam RpiTx.o mailbox.o RpiGpio.o RpiDma.o
+	rm -f  ../rpitx ../pissb ../pisstv ../pifsq ../pifm ../piam ../pidcf77 RpiTx.o mailbox.o RpiGpio.o RpiDma.o
 
 install: all
 	install -m 0755 ../pisstv /usr/bin
diff --git a/src/RpiDma.c b/src/RpiDma.c
index ca85fd5..6d02621 100644
--- a/src/RpiDma.c
+++ b/src/RpiDma.c
@@ -6,8 +6,12 @@
 char InitDma(void *FunctionTerminate)
 {
 	DMA_CHANNEL=4;
-	system("rm linuxversion.txt");
-	system("uname -r >> linuxversion.txt");
+	if (system("rm -f linuxversion.txt") != 0) {
+		fprintf(stderr, "rm failed\n");
+	}
+	if (system("uname -r >> linuxversion.txt") != 0) {
+		fprintf(stderr, "uname failed\n");
+	}
 	char *line = NULL;
 	size_t size;
 //	int fLinux=open("Flinuxversion.txt", "r');
diff --git a/src/RpiTx.c b/src/RpiTx.c
index 4453c67..02453da 100644
--- a/src/RpiTx.c
+++ b/src/RpiTx.c
@@ -81,6 +81,8 @@ Optimize CPU on PWMFrequency
 #define PLLFREQ_192             19200000	//PLLA = 19.2MHZ
 #define PLL_192			0x1
 
+#define HEADER_SIZE 44
+
 
 typedef unsigned char 	uchar ;		// 8 bit
 typedef unsigned short	uint16 ;	// 16 bit
@@ -1106,7 +1108,7 @@ main(int argc, char **argv)
 		{
 			FileInHandle = STDIN_FILENO;
 		}
-		else FileInHandle = open(FileName, 'r');
+		else FileInHandle = open(FileName, O_RDONLY);
 		if (FileInHandle < 0)
 		{
 			fatal("Failed to read Filein %s\n",FileName);
@@ -1116,8 +1118,10 @@ main(int argc, char **argv)
 	if(Mode==MODE_IQ)
 	{
 		IQArray=malloc(DmaSampleBurstSize*2*sizeof(signed short)); // TODO A FREE AT THE END OF SOFTWARE
-		char dummyheader[44];
-		read(FileInHandle,dummyheader,44);
+		char dummyheader[HEADER_SIZE];
+		if (read(FileInHandle,dummyheader,HEADER_SIZE) != HEADER_SIZE) {
+			fatal("Unable to read header\n");
+		}
 		
 	} 
 	if(Mode==MODE_IQ_FLOAT)
@@ -1297,9 +1301,11 @@ for (;;)
 						{
 							printf("Looping FileIn\n");
 							close(FileInHandle);
-							FileInHandle = open(FileName, 'r');
-							char dummyheader[44];
-							read(FileInHandle,dummyheader,44);
+							FileInHandle = open(FileName, O_RDONLY);
+							char dummyheader[HEADER_SIZE];
+							if (read(FileInHandle,dummyheader,HEADER_SIZE) != HEADER_SIZE) {
+								fatal("Unable to read header\n");
+							}
 							NbRead=read(FileInHandle,IQArray,DmaSampleBurstSize*2*2);
 						}
 						else
@@ -1376,7 +1382,7 @@ for (;;)
 						{
 							printf("Looping FileIn\n");
 							close(FileInHandle);
-							FileInHandle = open(FileName, 'r');
+							FileInHandle = open(FileName, O_RDONLY);
 						}
 						else if (FileInHandle != STDIN_FILENO) 
 							terminate(0);
@@ -1450,7 +1456,7 @@ for (;;)
 									{
 										//printf("Looping FileIn\n");
 										close(FileInHandle);
-										FileInHandle = open(FileName, 'r');
+										FileInHandle = open(FileName, O_RDONLY);
 										NbRead=read(FileInHandle,&SampleRf,sizeof(samplerf_t));
 									}
 									else if (FileInHandle != STDIN_FILENO) 
diff --git a/sstv/pisstv.c b/sstv/pisstv.c
index b346ec7..c10d763 100644
--- a/sstv/pisstv.c
+++ b/sstv/pisstv.c
@@ -31,7 +31,9 @@ void playtone(double Frequency,uint32_t Timing)
 	RfSample.Frequency=GlobalTuningFrequency+Frequency;
 	RfSample.WaitForThisSample=Timing*100L; //en 100 de nanosecond
 	//printf("Freq =%f Timing=%d\n",RfSample.Frequency,RfSample.WaitForThisSample);
-	write(FileFreqTiming,&RfSample,sizeof(samplerf_t));
+	if (write(FileFreqTiming,&RfSample,sizeof(samplerf_t)) != sizeof(samplerf_t)) {
+		fprintf(stderr, "Unable to write sample");
+	}
 
 }
 
@@ -153,10 +155,10 @@ main(int argc, char **argv)
 if (argc > 2) {
 		
 		char *sFilePicture=(char *)argv[1];
-	       	FilePicture = open(argv[1], 'r');
+	       	FilePicture = open(argv[1], O_RDONLY);
 
 		char *sFileFreqTiming=(char *)argv[2];
-	       	FileFreqTiming = open(argv[2],O_WRONLY|O_CREAT);
+	       	FileFreqTiming = open(argv[2], O_WRONLY|O_CREAT, 0644);
 		}
 		else
 		{