#include <unistd .h>
int get_bin_pathname( char *pathname )
{
    FILE *fp = NULL;
    char _filename[1024] = {0};
 
    int _pid = getpid();
 
    sprintf(_filename, "dirname `ls -n /proc/%d/exe | awk '{if ($8==\"->\") {print $19} else {if ($9==\"->\") {print $10} else {print $11}}}'`", _pid);
    fp = popen(_filename, "r");
    fgets(_filename, sizeof(_filename), fp);
    fclose(fp);
 
    _filename[strlen(_filename)-1] = '\0';
    strcpy( pathname, _filename );
 
    return 0;
}
</unistd>