--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
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+this service if you wish), that you receive source code or can get it
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+
+ To protect your rights, we need to make restrictions that forbid
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+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
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+
+ We protect your rights with two steps: (1) copyright the software, and
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+
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+that everyone understands that there is no warranty for this free
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+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+\f
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
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+
+Activities other than copying, distribution and modification are not
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+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
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+
+You may charge a fee for the physical act of transferring a copy, and
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+
+ 2. You may modify your copy or copies of the Program or any portion
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+
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+
+ b) You must cause any work that you distribute or publish, that in
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+
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+\f
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+identifiable sections of that work are not derived from the Program,
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+
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+
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+
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+\f
+ 4. You may not copy, modify, sublicense, or distribute the Program
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+This section is intended to make thoroughly clear what is believed to
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+\f
+ 8. If the distribution and/or use of the Program is restricted in
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+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+
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+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+\f
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
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+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
--- /dev/null
+/**
+ * collectd - src/rrdd.c
+ * Copyright (C) 2008 Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "rrdd.h"
+
+/*
+ * Types
+ */
+struct listen_socket_s
+{
+ int fd;
+ char path[PATH_MAX + 1];
+};
+typedef struct listen_socket_s listen_socket_t;
+
+/*
+ * Variables
+ */
+static listen_socket_t *listen_fds = NULL;
+static size_t listen_fds_num = 0;
+
+static int do_shutdown = 0;
+
+static pthread_t queue_thread;
+
+/*
+ * Functions
+ */
+static void *queue_thread_main (void *args) /* {{{ */
+{
+ while (do_shutdown == 0)
+ {
+ syslog (LOG_DEBUG, "queue_thread_main: Just woke up.");
+ sleep (1);
+ } /* while (do_shutdown == 0) */
+
+ syslog (LOG_DEBUG, "queue_thread_main: Exiting.");
+
+ return (NULL);
+} /* }}} void *queue_thread_main */
+
+static void sig_int_handler (int signal) /* {{{ */
+{
+ do_shutdown++;
+} /* }}} void sig_int_handler */
+
+static void sig_term_handler (int signal) /* {{{ */
+{
+ do_shutdown++;
+} /* }}} void sig_term_handler */
+
+static int open_listen_socket (const char *path) /* {{{ */
+{
+ int fd;
+ struct sockaddr_un sa;
+ listen_socket_t *temp;
+ int status;
+
+ temp = (listen_socket_t *) realloc (listen_fds,
+ sizeof (listen_fds[0]) * (listen_fds_num + 1));
+ if (temp == NULL)
+ {
+ syslog (LOG_ERR, "open_listen_socket: realloc failed.\n");
+ return (-1);
+ }
+ listen_fds = temp;
+ memset (listen_fds + listen_fds_num, 0, sizeof (listen_fds[0]));
+
+ fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
+ if (fd < 0)
+ {
+ syslog (LOG_ERR, "open_listen_socket: socket(2) failed.\n");
+ return (-1);
+ }
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sun_family = AF_UNIX;
+ strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
+
+ status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
+ if (status != 0)
+ {
+ syslog (LOG_ERR, "open_listen_socket: bind(2) failed.\n");
+ close (fd);
+ return (-1);
+ }
+
+ listen_fds[listen_fds_num].fd = fd;
+ strncpy (listen_fds[listen_fds_num].path, path,
+ sizeof (listen_fds[listen_fds_num].path) - 1);
+ listen_fds_num++;
+
+ return (0);
+} /* }}} int open_listen_socket */
+
+static int close_listen_sockets (void) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < listen_fds_num; i++)
+ {
+ close (listen_fds[i].fd);
+ unlink (listen_fds[i].path);
+ }
+
+ free (listen_fds);
+ listen_fds = NULL;
+ listen_fds_num = 0;
+
+ return (0);
+} /* }}} int close_listen_sockets */
+
+static void *listen_thread_main (void *args) /* {{{ */
+{
+ char buffer[4096];
+ int status;
+
+ status = open_listen_socket (RRDD_SOCK_PATH);
+ if (status != 0)
+ {
+ syslog (LOG_ERR, "listen_thread_main: open_listen_socket failed.");
+ return (NULL);
+ }
+
+ while (do_shutdown == 0)
+ {
+ syslog (LOG_DEBUG, "listen_thread_main: Just woke up.");
+
+ status = recv (listen_fds[0].fd, buffer, sizeof (buffer),
+ /* flags = */ 0);
+ if (status == 0)
+ {
+ continue;
+ }
+ else if (status < 0)
+ {
+ if (errno == EINTR)
+ continue;
+ else
+ {
+ syslog (LOG_ERR, "listen_thread_main: recv failed.");
+ continue;
+ }
+ }
+
+ syslog (LOG_DEBUG, "listen_thread_main: Received %i bytes.\n", status);
+ } /* while (do_shutdown == 0) */
+
+ close_listen_sockets ();
+
+ syslog (LOG_DEBUG, "listen_thread_main: Exiting.");
+
+ return (NULL);
+} /* }}} void *listen_thread_main */
+
+static int daemonize (void) /* {{{ */
+{
+ pid_t child;
+ int status;
+
+ child = fork ();
+ if (child < 0)
+ {
+ fprintf (stderr, "daemonize: fork(2) failed.\n");
+ return (-1);
+ }
+ else if (child > 0)
+ {
+ return (1);
+ }
+
+ /* Change into the /tmp directory. */
+ chdir ("/tmp");
+
+ /* Become session leader */
+ setsid ();
+
+ /* Open the first three file descriptors to /dev/null */
+ close (2);
+ close (1);
+ close (0);
+
+ open ("/dev/null", O_RDWR);
+ dup (0);
+ dup (0);
+
+ {
+ struct sigaction sa;
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = sig_int_handler;
+ sigaction (SIGINT, &sa, NULL);
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = sig_term_handler;
+ sigaction (SIGINT, &sa, NULL);
+ }
+
+ openlog ("rrdd", LOG_PID, LOG_DAEMON);
+
+ memset (&queue_thread, 0, sizeof (queue_thread));
+ status = pthread_create (&queue_thread, /* attr = */ NULL,
+ queue_thread_main, /* args = */ NULL);
+ if (status != 0)
+ {
+ syslog (LOG_ERR, "daemonize: pthread_create failed.");
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int daemonize */
+
+static int cleanup (void) /* {{{ */
+{
+ do_shutdown++;
+
+ pthread_join (queue_thread, /* return = */ NULL);
+
+ closelog ();
+
+ return (0);
+} /* }}} int cleanup */
+
+int main (int argc, char **argv)
+{
+ int status;
+
+ printf ("rrdd by Florian Forster, Version 0.1\n");
+
+ status = daemonize ();
+ if (status == 1)
+ {
+ struct sigaction sigchld;
+
+ memset (&sigchld, 0, sizeof (sigchld));
+ sigchld.sa_handler = SIG_IGN;
+ sigaction (SIGCHLD, &sigchld, NULL);
+
+ return (0);
+ }
+ else if (status != 0)
+ {
+ fprintf (stderr, "daemonize failed, exiting.\n");
+ return (1);
+ }
+
+ listen_thread_main (NULL);
+
+ cleanup ();
+
+ return (0);
+} /* int main */
+
+/*
+ * vim: set sw=2 sts=2 ts=8 et fdm=marker :
+ */
projects / rrdd.git / commitdiff