Evul Fread() Not Working =(

Hello,

struct Ip {
char *ip;
};
struct Container {
struct Ip IpList[AllowedIps];
};

void putiplist(Container *cont) {
FILE *fp;
const char sig[] = "Contain File";
fp = fopen("allowedips.lst", "wb");
if ( fp == NULL )
derror("PutIpList(): Null File Pointer");
int y = fwrite (&sig, sizeof(const char), sizeof(sig), fp);
int x = fwrite (cont, sizeof(struct Container), 1, fp);
printf("[%d-%d]-[%s]\n", y, x, cont->IpList[1].ip);
fclose(fp);
}


void getiplist(Container *cont) {
FILE *lfp;
char sig[12];
lfp = fopen("allowedips.lst", "rb");
if ( lfp == NULL )
derror("GetIpList(): Null File Pointer");
int y = fread (sig, sizeof(sig), 1, lfp);
int x = fread (&cont, sizeof(struct Container), 1, lfp);
printf("[%d-%d]-[%s]\n", y, x, cont->IpList[1].ip);
fclose(lfp);
}

Hopefully this code should explain itself, I'm trying to just save a Container structure. For some reason, this refuses to work, maybe Container is not a good struct name to use? =/
Thanks for any help.

-Drek

I see quite a few things wrong with that code. Here is an example that might help you.

#include <stdio.h>

struct zigzag {
int a;
char b[20];
};

int writeBinary(const struct zigzag);
int readBinary(struct zigzag *);

int main() {
struct zigzag myZig, inZig;
struct zigzag *ptr;

/* the memory address we will send to readbinary */
ptr = &inZig;

/* assign some dummy values */
myZig.a = 24;
strcpy(myZig.b, "Blubber");

/* Write the struct myZig and then read it back in */
if(writeBinary(myZig))
exit(1);
if(readBinary(ptr))
exit(1);

/* proof that it was successful */
printf("inZig.a: %d\n", inZig.a);
printf("inZig.b: %s\n", inZig.b);
}


int writeBinary(const struct zigzag j) {
FILE *outFile;

/* open the file we are writing to */
if(!(outFile = fopen("binout", "w")))
return 1;

/* use fwrite to write binary data to the file */
fwrite(&j,sizeof(struct zigzag),1,outFile);

fclose(outFile);

return 0;
}

int readBinary(struct zigzag *b) {
FILE *inFile;

if(!(inFile = fopen("binout", "r")))
return 1;

fread((struct zigzag *)b,sizeof(struct zigzag),1,inFile);

fclose(inFile);

return 0;
}