30 Mars

SCR1.2/TP11/get_numb.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define SZBUF 256
+
+int main(int argc, char const *argv[]){
+	int fd,n,l,x;
+	long int i, offset;
+	if (argc<3){
+		fprintf(stderr,"Usage : %s <file_name> <offset> \r",argv[0]);
+		exit (1);
+	} fd=open (argv[1], O_RDONLY);
+	if (fd==-1){
+		perror("Opening destination file fails");
+		exit (2);
+	} i=strtol(argv[2],NULL,0);
+	offset=i*(sizeof(int));
+	l=lseek(fd,offset,SEEK_SET);
+	if(l==1){
+		perror("lsink failed");
+		close(fd);
+		exit (3);
+	}
+	n=read(fd,&x,sizeof(int));
+	if(n==-1){
+		perror("Read in file failed");
+		close(fd);
+		exit (4);
+	} if(n==0){
+		printf("Out of range\n");
+	} else{
+		printf("The number at offset %ld is 0x%08x --> %d \n",i,x,x);
+	} close(fd);
+	exit(0);
+}

SCR1.2/TP11/put_numb.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define SZBUF 256
+
+int main(int argc, char const *argv[]){
+	char buf[SZBUF];
+	int fd,n,m;
+	if (argc<4){
+		fprintf(stderr,"Usage : %s <file_name> <32-bit int in Hex> <Offset in Hex> \r",argv[0]);
+		exit (1);
+	}
+}

SCR1.2/TP11/store_numb.c

@@ -9,7 +9,7 @@ int main(int argc, char const *argv[]){
 	char buf[SZBUF];
 	int fd,n,m;
 	if (argc<2){
-		fprintf(stderr,"Usage : %s <bSR_FILE> \r",argv[0]);
+		fprintf(stderr,"Usage : %s <SR_FILE> \n",argv[0]);
 		exit (1);
 	} fd=open (argv[1], O_WRONLY|O_TRUNC|O_CREAT,0b00);
 	if (fd==-1){