+
+/* Returns the name of signal 'signum' as a string. The string may be in a
+ * static buffer that is reused from one call to the next.
+ *
+ * The string is probably a (possibly multi-word) description of the signal
+ * (e.g. "Hangup") instead of just the stringified version of the macro
+ * (e.g. "SIGHUP"). */
+const char *
+signal_name(int signum)
+{
+ const char *name = NULL;
+#ifdef HAVE_STRSIGNAL
+ name = strsignal(signum);
+#endif
+ if (!name) {
+ static char buffer[7 + INT_STRLEN(int) + 1];
+ sprintf(buffer, "signal %d", signum);
+ name = buffer;
+ }
+ return name;
+}
+
+void
+xsigaction(int signum, const struct sigaction *new, struct sigaction *old)
+{
+ if (sigaction(signum, new, old)) {
+ VLOG_FATAL("sigaction(%s) failed (%s)",
+ signal_name(signum), strerror(errno));
+ }
+}
+
+void
+xsigprocmask(int how, const sigset_t *new, sigset_t *old)
+{
+ if (sigprocmask(how, new, old)) {
+ VLOG_FATAL("sigprocmask failed (%s)", strerror(errno));
+ }
+}