#include <stdio.h>
+void print_version(FILE* f, const char* prog_name);
+
void or_die(int b, const char* msg);
void* malloc_or_die(size_t);
void* realloc_or_die(void*, size_t);
FILE* fopen_or_die(const char*, const char*);
+/* Open a file for reading, creating it if it doesn't exist, and complaining if
+ * it does. */
+FILE* open_without_clobber(const char* filename);
+
#endif