Strcat adding "blank space" to array - c

Question

I have a function that is reading from a file for package names and their directories. I have setup a variable to catch one item before the other (they are separated by a comma). When I append to my string it seems to add it just fine. However, when I go to realloc the string (compress it down to its actual size) it owns retains half of the characters.
When I used to a for loop to test it, there are empty characters being projected between each character. So I have a test work "duck" when I print it as a string it will write "duck" however if it iterate over it, it will go "d" " " "u" " " "c"
while(1)
{
char c = fgetc(db);
actual_file_size++;
if(c == EOF)
{
//pkg_install_dir = realloc(pkg_install_dir, (sizeof(pkg_install_dir) + 2));
//printf("The install dir is: %s\n", pkg_install_dir);
break;
}
if(is_pkg_name) {
printf("Chracter being added to pkg_name: %c\n", c);
strcat(pkg_name, &c);
} else {
strcat(pkg_install_dir, &c);
}
if(c == ',')
{
printf("Actual file size int is: %d\n", actual_file_size);
printf("Package name before realloc: %s\n", pkg_name);
for(int i = 0; i < 5; i++)
{
printf("%c\n", pkg_name[i]);
}
pkg_name = realloc(pkg_name, actual_file_size);
is_pkg_name = 0;
actual_file_size = 0;
printf("The string is:%s\n", pkg_name);
}
Terminal output:

Answer 1

Well thank you to kaylum and this article: How to get char* with unknown length in C?
I was able to solve my issue by removing the function and using realloc inside the while loop please see below and I hope it helps someone else out in the future!
The pkg_name & pkg_install_dir are still using a char buffer because I realized using the realloc way from the article the two points of memory were rolling over each other (good amount of time to figure that out and I will never get back!).
Learning C is fun!
int read_db()
{
FILE *db;
db = fopen("/tmp/devpkg/db/db", "r");
char *pkg_name = malloc(MAX_CHAR_BUFF);
char *pkg_install_dir = malloc(MAX_CHAR_BUFF);
int is_pkg_name = 1;
int actual_file_size = 0;
while(1)
{
char c = fgetc(db);
if(c == EOF)
{
pkg_install_dir = realloc(pkg_install_dir, (actual_file_size - 1));
pkg_install_dir[actual_file_size - 1] = '\0';
break; // while loop will finish here
}
if(is_pkg_name) {
pkg_name[actual_file_size] = c;
} else {
pkg_install_dir[actual_file_size] = c;
}
actual_file_size++;
if(c == ',')
{
pkg_name = realloc(pkg_name, (actual_file_size - 1));
pkg_name[actual_file_size - 1] = '\0';
is_pkg_name = 0;
actual_file_size = 0;
printf("The string is:%s\n", pkg_name);
}
}
fclose(db);
free(pkg_name);
free(pkg_install_dir);
return 0;
}