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-rw-r--r--fuse/fuse_signals.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/fuse/fuse_signals.c b/fuse/fuse_signals.c
new file mode 100644
index 000000000..353cb24bd
--- /dev/null
+++ b/fuse/fuse_signals.c
@@ -0,0 +1,72 @@
+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU LGPLv2.
+ See the file COPYING.LIB
+*/
+
+#include "fuse_lowlevel.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+
+static struct fuse_session *fuse_instance;
+
+static void exit_handler(int sig)
+{
+ (void) sig;
+ if (fuse_instance)
+ fuse_session_exit(fuse_instance);
+}
+
+static int set_one_signal_handler(int sig, void (*handler)(int), int remove)
+{
+ struct sigaction sa;
+ struct sigaction old_sa;
+
+ memset(&sa, 0, sizeof(struct sigaction));
+ sa.sa_handler = remove ? SIG_DFL : handler;
+ sigemptyset(&(sa.sa_mask));
+ sa.sa_flags = 0;
+
+ if (sigaction(sig, NULL, &old_sa) == -1) {
+ perror("fuse: cannot get old signal handler");
+ return -1;
+ }
+
+ if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
+ sigaction(sig, &sa, NULL) == -1) {
+ perror("fuse: cannot set signal handler");
+ return -1;
+ }
+ return 0;
+}
+
+int fuse_set_signal_handlers(struct fuse_session *se)
+{
+ if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
+ set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
+ set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
+ set_one_signal_handler(SIGPIPE, SIG_IGN, 0) == -1)
+ return -1;
+
+ fuse_instance = se;
+ return 0;
+}
+
+void fuse_remove_signal_handlers(struct fuse_session *se)
+{
+ if (fuse_instance != se)
+ fprintf(stderr,
+ "fuse: fuse_remove_signal_handlers: unknown session\n");
+ else
+ fuse_instance = NULL;
+
+ set_one_signal_handler(SIGHUP, exit_handler, 1);
+ set_one_signal_handler(SIGINT, exit_handler, 1);
+ set_one_signal_handler(SIGTERM, exit_handler, 1);
+ set_one_signal_handler(SIGPIPE, SIG_IGN, 1);
+}
+