Externals: Add libLZMA.

Externals/liblzma/tuklib/tuklib_exit.c

@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       tuklib_exit.c
+/// \brief      Close stdout and stderr, and exit
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_common.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "tuklib_gettext.h"
+#include "tuklib_progname.h"
+#include "tuklib_exit.h"
+
+
+extern void
+tuklib_exit(int status, int err_status, int show_error)
+{
+	if (status != err_status) {
+		// Close stdout. If something goes wrong,
+		// print an error message to stderr.
+		const int ferror_err = ferror(stdout);
+		const int fclose_err = fclose(stdout);
+		if (ferror_err || fclose_err) {
+			status = err_status;
+
+			// If it was fclose() that failed, we have the reason
+			// in errno. If only ferror() indicated an error,
+			// we have no idea what the reason was.
+			if (show_error)
+				fprintf(stderr, "%s: %s: %s\n", progname,
+						_("Writing to standard "
+							"output failed"),
+						fclose_err ? strerror(errno)
+							: _("Unknown error"));
+		}
+	}
+
+	if (status != err_status) {
+		// Close stderr. If something goes wrong, there's
+		// nothing where we could print an error message.
+		// Just set the exit status.
+		const int ferror_err = ferror(stderr);
+		const int fclose_err = fclose(stderr);
+		if (fclose_err || ferror_err)
+			status = err_status;
+	}
+
+	exit(status);
+}