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authortcunha <tcunha>2010-05-14 14:30:00 +0000
committertcunha <tcunha>2010-05-14 14:30:00 +0000
commit1f6b9d43ae63ad4dc932e2979e07d9a5c9123bc3 (patch)
tree7c2c8a394a5d61bd835a07ef5c67197d4e5d7bc8 /signal.c
parent028e7f153ad6af537b476ca602ffde6f09b4e3e3 (diff)
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Sync OpenBSD patchset 696:
Make signal handler setup/teardown two common functions instead of six, and reset SIGCHLD after fork to fix problems with some shells. From Romain Francois.
Diffstat (limited to 'signal.c')
-rw-r--r--signal.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/signal.c b/signal.c
new file mode 100644
index 00000000..aaa6abd4
--- /dev/null
+++ b/signal.c
@@ -0,0 +1,88 @@
+/* $Id: signal.c,v 1.1 2010/05/14 14:30:01 tcunha Exp $ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
+ * Copyright (c) 2010 Romain Francoise <rfrancoise@debian.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+#include <signal.h>
+
+#include "tmux.h"
+
+struct event ev_sigchld;
+struct event ev_sigcont;
+struct event ev_sigterm;
+struct event ev_sigusr1;
+struct event ev_sigwinch;
+
+void
+set_signals(void(*handler)(int, short, unused void *))
+{
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof sigact);
+ sigemptyset(&sigact.sa_mask);
+ sigact.sa_flags = SA_RESTART;
+ sigact.sa_handler = SIG_IGN;
+ if (sigaction(SIGINT, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGPIPE, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGUSR2, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGTSTP, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGHUP, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+
+ signal_set(&ev_sigchld, SIGCHLD, handler, NULL);
+ signal_add(&ev_sigchld, NULL);
+ signal_set(&ev_sigcont, SIGCONT, handler, NULL);
+ signal_add(&ev_sigcont, NULL);
+ signal_set(&ev_sigterm, SIGTERM, handler, NULL);
+ signal_add(&ev_sigterm, NULL);
+ signal_set(&ev_sigusr1, SIGUSR1, handler, NULL);
+ signal_add(&ev_sigusr1, NULL);
+ signal_set(&ev_sigwinch, SIGWINCH, handler, NULL);
+ signal_add(&ev_sigwinch, NULL);
+}
+
+void
+clear_signals(void)
+{
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof sigact);
+ sigemptyset(&sigact.sa_mask);
+ sigact.sa_flags = SA_RESTART;
+ sigact.sa_handler = SIG_DFL;
+ if (sigaction(SIGINT, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGPIPE, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGUSR2, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGTSTP, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+ if (sigaction(SIGHUP, &sigact, NULL) != 0)
+ fatal("sigaction failed");
+
+ event_del(&ev_sigchld);
+ event_del(&ev_sigcont);
+ event_del(&ev_sigterm);
+ event_del(&ev_sigusr1);
+ event_del(&ev_sigwinch);
+}