add xsigaction

Signed-off-by: Mattias Andrée <maandree@operamail.com>

2 files changed, 39 insertions, 0 deletions

diff --git a/src/libmdsserver/util.c b/src/libmdsserver/util.c
index c4606e8..81793ae 100644
--- a/src/libmdsserver/util.c
+++ b/src/libmdsserver/util.c
@@ -22,6 +22,7 @@
 #include <unistd.h>
 #include <limits.h>
 #include <string.h>
+#include <signal.h>
 
 
 /**
@@ -80,3 +81,28 @@ void reexec_server(int argc, char** argv, int reexeced)
   execv(readlink_buf, reexec_args);
 }
 
+
+/**
+ * Set up a signal trap.
+ * This function should only be used for common mds
+ * signals, and this function may choose to add
+ * additional behaviour depending on the signal, such
+ * as blocking other signals.
+ * 
+ * @param   signo     The signal to trap
+ * @param   function  The function to run when the signal is caught
+ * @return            Zero on success, -1 on error
+ */
+int xsigaction(int signo, void (*function)(int signo))
+{
+  struct sigaction action;
+  sigset_t sigset;
+  
+  sigemptyset(&sigset);
+  action.sa_handler = function;
+  action.sa_mask = sigset;
+  action.sa_flags = 0;
+  
+  return sigaction(signo, &action, NULL);
+}
+
diff --git a/src/libmdsserver/util.h b/src/libmdsserver/util.h
index 4f505db..8bfaa71 100644
--- a/src/libmdsserver/util.h
+++ b/src/libmdsserver/util.h
@@ -37,6 +37,19 @@ char* getenv_nonempty(const char* var);
  */
 void reexec_server(int argc, char** argv, int reexeced);
 
+/**
+ * Set up a signal trap.
+ * This function should only be used for common mds
+ * signals, and this function may choose to add
+ * additional behaviour depending on the signal, such
+ * as blocking other signals.
+ * 
+ * @param   signo     The signal to trap
+ * @param   function  The function to run when the signal is caught
+ * @return            Zero on success, -1 on error
+ */
+int xsigaction(int signo, void (*function)(int signo));
+
 
 #endif