Problem with passing array of pointers to struct among functions in C
- by karatemonkey
The Code that follows segfaults on the call to strncpy and I can't see what I am doing wrong. I need another set of eyes to look it this. Essentially I am trying to alloc memory for a struct that is pointed to by an element in a array of pointers to struct.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_POLICY_NAME_SIZE 64
#define POLICY_FILES_TO_BE_PROCESSED "SPFPolicyFilesReceivedOffline\0"
typedef struct TarPolicyPair
{
int AppearanceTime;
char *IndividualFile;
char *FullPolicyFile;
} PolicyPair;
enum {
bwlist = 0,
fzacts,
atksig,
rules,
MaxNumberFileTypes
};
void SPFCreateIndividualPolicyListing(PolicyPair *IndividualPolicyPairtoCreate )
{
IndividualPolicyPairtoCreate = (PolicyPair *) malloc(sizeof(PolicyPair));
IndividualPolicyPairtoCreate->IndividualFile = (char *)malloc((MAX_POLICY_NAME_SIZE * sizeof(char)));
IndividualPolicyPairtoCreate->FullPolicyFile = (char *)malloc((MAX_POLICY_NAME_SIZE * sizeof(char)));
IndividualPolicyPairtoCreate->AppearanceTime = 0;
memset(IndividualPolicyPairtoCreate->IndividualFile, '\0', (MAX_POLICY_NAME_SIZE * sizeof(char)));
memset(IndividualPolicyPairtoCreate->FullPolicyFile, '\0', (MAX_POLICY_NAME_SIZE * sizeof(char)));
}
void SPFCreateFullPolicyListing(SPFPolicyPair **CurrentPolicyPair, char *PolicyName, char *PolicyRename)
{
int i;
for(i = 0; i < MaxNumberFileTypes; i++)
{
CreateIndividualPolicyListing((CurrentPolicyPair[i]));
// segfaults on this call
strncpy((*CurrentPolicyPair)[i].IndividualFile, POLICY_FILES_TO_BE_PROCESSED, (SPF_POLICY_NAME_SIZE * sizeof(char)));
}
}
int main()
{
SPFPolicyPair *CurrentPolicyPair[MaxNumberFileTypes] = {NULL, NULL, NULL, NULL};
int i;
CreateFullPolicyListing(&CurrentPolicyPair, POLICY_FILES_TO_BE_PROCESSED, POLICY_FILES_TO_BE_PROCESSED);
return 0;
}
