void *failtest_malloc(size_t size, const char *file, unsigned line);
void *failtest_realloc(void *ptr, size_t size,
const char *file, unsigned line);
-int failtest_open(const char *pathname, int flags,
+int failtest_open(const char *pathname,
const char *file, unsigned line, ...);
int failtest_pipe(int pipefd[2], const char *file, unsigned line);
ssize_t failtest_read(int fd, void *buf, size_t count,