1 files changed, 77 insertions, 0 deletions
diff --git a/src/utils/indxbib/signal.c b/src/utils/indxbib/signal.c
new file mode 100644
index 0000000..2231b64
--- /dev/null
+++ b/src/utils/indxbib/signal.c
@@ -0,0 +1,77 @@
+/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+/* Unfortunately vendors seem to have problems writing a <signal.h>
+that is correct for C++, so we implement all signal handling in C. */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <signal.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Prototype */
+void catch_fatal_signals(void);
+
+extern void cleanup(void);
+
+static RETSIGTYPE handle_fatal_signal(int signum)
+{
+  signal(signum, SIG_DFL);
+  cleanup();
+#ifdef HAVE_KILL
+  kill(getpid(), signum);
+#else
+  /* MS-DOS and Win32 don't have kill(); the best compromise is
+     probably to use exit() instead. */
+  exit(signum);
+#endif
+}
+
+void catch_fatal_signals(void)
+{
+#ifdef SIGHUP
+  signal(SIGHUP, handle_fatal_signal);
+#endif
+  signal(SIGINT, handle_fatal_signal);
+  signal(SIGTERM, handle_fatal_signal);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifndef HAVE_RENAME
+
+void ignore_fatal_signals()
+{
+#ifdef SIGHUP
+  signal(SIGHUP, SIG_IGN);
+#endif
+  signal(SIGINT, SIG_IGN);
+  signal(SIGTERM, SIG_IGN);
+}
+
+#endif /* not HAVE_RENAME */