1 files changed, 85 insertions, 0 deletions
diff --git a/src/lib/krad/t_daemon.h b/src/lib/krad/t_daemon.h
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+++ b/src/lib/krad/t_daemon.h
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+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* lib/krad/t_daemon.h - Daemonization helper for RADIUS test programs */
+/*
+ * Copyright 2013 Red Hat, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef T_DAEMON_H_
+#define T_DAEMON_H_
+
+#include "t_test.h"
+#include <libgen.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+static pid_t daemon_pid;
+
+static void
+daemon_stop(void)
+{
+    if (daemon_pid == 0)
+        return;
+    kill(daemon_pid, SIGTERM);
+    waitpid(daemon_pid, NULL, 0);
+    daemon_pid = 0;
+}
+
+static krb5_boolean
+daemon_start(int argc, const char **argv)
+{
+    int fds[2];
+    char buf[1];
+
+    if (argc != 3 || argv == NULL)
+        return FALSE;
+
+    if (daemon_pid != 0)
+        return TRUE;
+
+    if (pipe(fds) != 0)
+        return FALSE;
+
+    /* Start the child process with the write end of the pipe as stdout. */
+    daemon_pid = fork();
+    if (daemon_pid == 0) {
+        dup2(fds[1], STDOUT_FILENO);
+        close(fds[0]);
+        close(fds[1]);
+        exit(execlp(argv[1], argv[1], argv[2], NULL));
+    }
+    close(fds[1]);
+
+    /* The child will write a sentinel character when it is listening. */
+    if (read(fds[0], buf, 1) != 1 || *buf != '~')
+        return FALSE;
+    close(fds[0]);
+
+    atexit(daemon_stop);
+    return TRUE;
+}
+
+#endif /* T_DAEMON_H_ */