ssnprintf(filename, sizeof(filename), "/proc/%li/io", ps->id);
if ((fh = fopen(filename, "r")) == NULL) {
DEBUG("ps_read_io: Failed to open file `%s'", filename);
ssnprintf(filename, sizeof(filename), "/proc/%li/io", ps->id);
if ((fh = fopen(filename, "r")) == NULL) {
DEBUG("ps_read_io: Failed to open file `%s'", filename);