When I run this command from the console prompt it works just fine, but when I run it from userhook1
it causes a segmentation fault.  I am trying to get two programs to talk to each other one in background and one
in forground. 

Command works from console:

/mnt/storage/part1 & /mnt/storage/part2

Here is userhook1:

/mnt/storage/part1 & /mnt/storage/part2

Here is part1.c:
#include <stdio.h>
#include <time.h>
#include <string.h>
int main()
{
    time_t CurTime;
    time_t OldTime;
    FILE * talk;
    for(;;)
    {
        CurTime = time(&CurTime);
        if ((CurTime != OldTime) && (0 == (CurTime % 5)))
        {
            talk = fopen("/tmp/talk","wc");
            fprintf(talk,"The current time is %ld\n",CurTime);
            OldTime = CurTime;
            fclose(talk);
        }
    }
    return 0;
}

Here is part2.c:

#include <stdio.h>
#include <time.h>
#include <string.h>
int main()
{
    time_t CurTime;
    time_t OldTime;
    FILE * listen;
    char line [100]={'\0'};
    for(;;)
    {
        CurTime = time(&CurTime);
        if ((CurTime != OldTime) && (3 == (CurTime % 5)))
        {
            listen = fopen("/tmp/talk","rc");
            fgets(line,sizeof(line),listen);
            fclose(listen);
            printf("Line was %s",line);
            OldTime = CurTime;
        }
    }
    return 0;
}

Since it always works from the command line and always crashes from userhook1 how do I track down this issue?
HELP!