#include #include #include #include #define DEVICE "/dev/pp" int main() { int ddfd = 0; int ret = 0; ddfd = open(DEVICE, O_RDWR); if (ddfd < 0) { printf("\nOpen of %s failed.\n", DEVICE); exit(-1); } printf("\nOpen of %s succeeded.\n", DEVICE); ret = close(ddfd); if (ret < 0) { printf("\nClosing %s failed.\n", DEVICE); exit(-1); } printf("\n Close of %s succeeded.\n", DEVICE); exit(0); }