+#define _GNU_SOURCE
+
+#include "temp_file.h"
+
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sysexits.h>
+
+void make_temporary_file(char** temp_filename, FILE** temp_file) {
+ char* TMPDIR = getenv("TMPDIR");
+ if (TMPDIR == NULL) {
+ TMPDIR = "/tmp";
+ }
+ if (asprintf(temp_filename, "%s/reverse.XXXXXX", TMPDIR) == -1) {
+ errx(EX_OSERR, "Could not assemble temporary filename");
+ }
+ int fd = mkstemp(*temp_filename);
+ if (fd == -1) err(EX_IOERR, "Could not make a temporary file");
+ *temp_file = fdopen(fd, "w");
+ if (*temp_file == NULL) err(EX_IOERR, "Could not open temporary file");
+}