Segfault on fscanf - c

Question

filenamelists is a struct with two file pointers. merge mergesorts these two fileptrs. I'm getting a segfault on the while(fscanf(filenamelist[0].file1, "%d", &chd) != EOF). I think its because I'm not implementing pthread correctly. Ive been trying to debug forever so any help would be appreciated. tempf is a file ptr to the mergesorted arrays. It is rewinded in the merge function itself.
for(i=0; i<size; i++)
{
if(argc==1)
{
char* tedious2 = (char*) malloc((strlen(argv[i+1]+7))*sizeof(char));
strcpy(tedious2,argv[i+1]);
filenamelist[i].file1 = fopen(strcat(tedious2,".sorted"),"r");
filenamelist[i].file2 = NULL;
filenamelist[i].alone = 1;
free(tedious2);
break;
}
else if(size-1 ==i && size%2 != 0)
{
char* tedious1 = (char*) malloc((strlen(argv[i+1]+7))*sizeof(char));
strcpy(tedious1,argv[i+1]);
filenamelist[i].file1 = fopen(strcat(tedious1,".sorted"),"r");
filenamelist[i].file2 = NULL;
filenamelist[i].alone = 1;
free(tedious1);
}
else
{
char* tedious3 = (char*) malloc((strlen(argv[i+1]+7))*sizeof(char));
strcpy(tedious3,argv[i+1]);
char* tedious4 = (char*) malloc((strlen(argv[i+2]+7))*sizeof(char));
strcpy(tedious4,argv[i+2]);
filenamelist[i].file1 = fopen(strcat(tedious3,".sorted"),"r");
filenamelist[i].file2 = fopen(strcat(tedious4,".sorted"),"r");
filenamelist[i].alone = 0;
free(tedious3);
free(tedious4);
}
}
// pthread_t* threadid2;
// threadid2 = (pthread_t*) malloc(sizeof(pthread_t)*(2*argc));
while(size>=0)
{
i = 0;
pthread_t* threadid2;
threadid2 = (pthread_t*) malloc(sizeof(pthread_t)*size);
for ( ; i<size;i++ )
{
pthread_create(&threadid2[i], NULL, merge, &filenamelist[i]);
}
i = 0;
for ( ; i<size; i++)
{
pthread_join(threadid2[i], tempf);
if (i%2 == 0)
{
filenamelist[i/2].file1 = tempf;
}
else
{
filenamelist[i/2].file2 = tempf;
}
}
zit=0;
truth = 0;
while(zit<z)
{
if(inputFiles[zit] == tempf)
truth = 1;
zit++;
}
if(truth != 1)
{
inputFiles[z] = tempf;
z++;
}
if(size==1)
size = 0;
else if (size % 2 == 0)
size = size/2;
else
size = (size/2)+1;
free(threadid2);
}
int chd = 0;
// if(0!=feof(tempf))
// rewind(tempf);
//rewind(filenamelist[0]->file1);
int finish = 0;
//printf("file 1:%p",tempf);
while(fscanf(filenamelist[0].file1, "%d", &chd) != EOF)
finish++;
rewind(filenamelist[0].file1);
int* finarr = (int*) malloc(finish*sizeof(int));
int xx =0;
for(;fscanf(filenamelist[0].file1, "%d", &chd) != EOF; xx++)
finarr[xx] = chd;
tempf is declared at start of func as FILE* tempf;

Answer 1

char* tedious2 = (char*) malloc((strlen(argv[i+1]+7))*sizeof(char));
Make that:
char *tedious2 = malloc( strlen(argv[i+1]) + strlen(".sorted") + 1 );