Pre-lab 10.1 completed

Labs/Lab10/Makefile

@@ -22,9 +22,9 @@
 # compiler
 CC = gcc
 
-CFLAGS = -g -Wall
+CFLAGS = -std=gnu99 -g -Wall
 
-EXE = file_stat read_dir
+EXE = file_stat read_dir fdump
 
 all: $(EXE)
 
@@ -40,5 +40,11 @@ read_dir: read_dir.o
 read_dir.o: read_dir.c
 	$(CC) -c $(CFLAGS) read_dir.c
 
+hexdump.o: hexdump.h hexdump.c 
+	$(CC) $(CFLAGS) -c hexdump.c -o hexdump.o
+
+fdump: fdump.c hexdump.o 
+	$(CC) $(CFLAGS) fdump.c hexdump.o -o fdump 
+
 clean:
 	/bin/rm -f *~ *.o core $(EXE)

Labs/Lab10/fdump.c

@@ -7,10 +7,42 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <string.h>
 
 #include "hexdump.h"
 
+#define MAXLEN 20
+
 int main(int argc, char* argv[]){
+	FILE *fp;	
+
+	char filename[MAXLEN];
+	unsigned int offset;
+	unsigned int size;
+	unsigned char buffer[256];
+
+
+	if (argc < 4){
+		printf("Correct usage: %s [filename] [offset] [size]\n",argv[0]);
+		exit(-1);
+	}
+	else {
+		strcpy(filename, argv[1]);
+		offset = atoi(argv[2]);
+		size = atoi(argv[3]);
+	}
+
+	fp = fopen(filename, "r+");
+	fseek(fp,offset,SEEK_SET);
+	
+	for (int i =0; i<size;i++){
+		buffer[i] = fgetc(fp);
+	}
 	
+	fclose(fp);
+
+	hexdump(buffer,size+1);
+	 
+	return 0;
 
 }