1 files changed, 165 insertions, 0 deletions
diff --git a/libdaemon/dfork.h b/libdaemon/dfork.h
new file mode 100644
index 0000000..47b1630
--- /dev/null
+++ b/libdaemon/dfork.h
@@ -0,0 +1,165 @@
+#ifndef foodaemonforkhfoo
+#define foodaemonforkhfoo
+
+/***
+  This file is part of libdaemon.
+
+  Copyright 2003-2008 Lennart Poettering
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+
+***/
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \mainpage libdaemon
+ *
+ * libdaemon
+ *
+ * For a brief explanation of libdaemons's purpose, have a look on the
+ * README file. Thank you!
+ *
+ */
+
+/** \example testd.c
+ * This is an example for the usage of libdaemon
+ */
+
+/** \file
+ *
+ * Contains an API for doing a daemonizing fork().
+ *
+ * You may daemonize by calling daemon_fork(), a function similar to
+ * the plain fork(). If you want to return a return value of the
+ * initialization procedure of the child from the parent, you may use
+ * the daemon_retval_xxx() functions.
+ */
+
+/** Does a daemonizing fork(). For the new daemon process STDIN,
+ * STDOUT, STDERR are connected to /dev/null, the process is a session
+ * leader, the current directory is changed to /, the umask is set to
+ * 777.
+ * @return On success, the PID of the child process is returned in the
+ * parent's thread of execution, and a 0 is returned in the child's
+ * thread of execution. On failure, -1 will be returned in the
+ * parent's context, no child process will be created, and errno will
+ * be set appropriately.
+ */
+pid_t daemon_fork(void);
+
+/** Allocate and initialize resources required by the
+ * daemon_retval_xxx() functions. These functions allow the child to
+ * send a value to the parent after completing its initialisation.
+ * Call this in the parent before forking.
+ * @return zero on success, nonzero on failure.
+ */
+int daemon_retval_init(void);
+
+/** Frees the resources allocated by daemon_retval_init(). This should
+ * be called if neither daemon_retval_wait() nor daemon_retval_send()
+ * is called in the current process. The resources allocated by
+ * daemon_retval_init() should be freed in both parent and daemon
+ * process. This may be achieved by using daemon_retval_wait()
+ * resp. daemon_retval_send(), or by using daemon_retval_done().
+ */
+void daemon_retval_done(void);
+
+/** Return the value sent by the child via the daemon_retval_send()
+ * function, but wait only the specified number of seconds before
+ * timing out and returning a negative number. Should be called just
+ * once from the parent process only. A subsequent call to
+ * daemon_retval_done() in the parent is ignored.
+ *
+ * @param timeout Thetimeout in seconds
+ * @return The integer passed daemon_retval_send() in the daemon process, or -1 on failure.
+ */
+int daemon_retval_wait(int timeout);
+
+/** Send the specified integer to the parent process. Do not send -1
+ * because this signifies a library error. Should be called just once
+ * from the daemon process only. A subsequent call to
+ * daemon_retval_done() in the daemon is ignored.  @param s The
+ * integer to pass to daemon_retval_wait() in the parent process
+ * @return Zero on success, nonzero on failure.
+ */
+int daemon_retval_send(int s);
+
+/** This variable is defined to 1 iff daemon_close_all() and
+ * daemon_close_allv() are supported.
+ * @since 0.11
+ * @see daemon_close_all(), daemon_close_allv() */
+#define DAEMON_CLOSE_ALL_AVAILABLE 1
+
+/** Close all file descriptors except those passed. List needs to be
+ * terminated by -1. FDs 0, 1, 2 will be kept open anyway.
+ * @since 0.11
+ * @see DAEMON_CLOSE_ALL_AVAILABLE */
+int daemon_close_all(int except_fd, ...);
+
+/** Same as daemon_close_all but takes an array of fds, terminated by
+ * -1
+ * @since 0.11
+ * @see DAEMON_CLOSE_ALL_AVAILABLE */
+int daemon_close_allv(const int except_fds[]);
+
+/** This variable is defined to 1 iff daemon_unblock_sigs() and
+ * daemon_unblock_sigsv() are supported.
+ * @since 0.13
+ * @see daemon_unblock_sigs(), daemon_unblock_sigsv()*/
+#define DAEMON_UNBLOCK_SIGS_AVAILABLE 1
+
+/** Unblock all signals except those passed. List needs to be
+ * terminated by -1.
+ * @since 0.13
+ * @see DAEMON_UNBLOCK_SIGS_AVAILABLE */
+int daemon_unblock_sigs(int except, ...);
+
+/** Same as daemon_unblock_sigs() but takes an array of signals,
+ * terminated by -1
+ * @since 0.13
+ * @see DAEMON_UNBLOCK_SIGS_AVAILABLE */
+int daemon_unblock_sigsv(const int except[]);
+
+/** This variable is defined to 1 iff daemon_reset_sigs() and
+ * daemon_reset_sigsv() are supported.
+ * @since 0.13
+ * @see daemon_reset_sigs(), daemon_reset_sigsv() */
+#define DAEMON_RESET_SIGS_AVAILABLE 1
+
+/** Reset all signal handlers except those passed. List needs to be
+ * terminated by -1.
+ * @since 0.13
+ * @see DAEMON_RESET_SIGS_AVAILABLE */
+int daemon_reset_sigs(int except, ...);
+
+/** Same as daemon_reset_sigs() but takes an array of signals,
+ * terminated by -1
+ * @since 0.13
+ * @see DAEMON_RESET_SIGS_AVAILABLE */
+int daemon_reset_sigsv(const int except[]);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif