From d1bb7d8bba2159935609fcbf2cbc9b2ed33b5bb5 Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Fri, 20 Jun 2008 19:55:05 +0200 Subject: [PATCH 1/1] Initial commit: rrdd, rrdc, librrdc.so Deamonization, socket opening and build system work, but the protocol is not implemented yet. The protocol will be implemented in librrdc.so, so that external programs can easily use the daemon. --- AUTHORS | 1 + COPYING | 340 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ChangeLog | 0 Makefile.am | 3 + NEWS | 0 README | 0 src/Makefile.am | 14 +++ src/librrdc.c | 121 ++++++++++++++++++++ src/rrdc.c | 106 ++++++++++++++++++ src/rrdc.h | 31 ++++++ src/rrdd.c | 274 +++++++++++++++++++++++++++++++++++++++++++++ src/rrdd.h | 73 ++++++++++++ 12 files changed, 963 insertions(+) create mode 100644 AUTHORS create mode 100644 COPYING create mode 100644 ChangeLog create mode 100644 Makefile.am create mode 100644 NEWS create mode 100644 README create mode 100644 src/Makefile.am create mode 100644 src/librrdc.c create mode 100644 src/rrdc.c create mode 100644 src/rrdc.h create mode 100644 src/rrdd.c create mode 100644 src/rrdd.h diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..4252926 --- /dev/null +++ b/AUTHORS @@ -0,0 +1 @@ +Florian Forster diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..623b625 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + 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. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..e69de29 diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..6954945 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +INCLUDES = $(LTDLINCL) diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..e69de29 diff --git a/README b/README new file mode 100644 index 0000000..e69de29 diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..456fb13 --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,14 @@ +AM_CFLAGS = -pthread + +bin_PROGRAMS = rrdc rrdd + +lib_LTLIBRARIES = librrdc.la + +librrdc_la_SOURCES = librrdc.c rrdd.h rrdc.h + +rrdc_SOURCES = rrdc.c rrdd.h rrdc.h +rrdc_LDADD = librrdc.la + +rrdd_SOURCES = rrdd.c rrdd.h + + diff --git a/src/librrdc.c b/src/librrdc.c new file mode 100644 index 0000000..c0ede89 --- /dev/null +++ b/src/librrdc.c @@ -0,0 +1,121 @@ +/** + * collectd - src/rrdc.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 + **/ + +#include "rrdd.h" +#include "rrdc.h" + +#define SOCK_TEMPLATE "/tmp/rrdc.sock.XXXXXX" + +static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; +static int sd; +static FILE *sh; + +int rrdd_connect (const char *path) +{ + struct sockaddr_un sa; + int status; + + pthread_mutex_lock (&lock); + + if (sh != NULL) + { + pthread_mutex_unlock (&lock); + return (0); + } + + sd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0); + if (sd < 0) + { + status = errno; + pthread_mutex_unlock (&lock); + return (status); + } + + memset (&sa, 0, sizeof (sa)); + sa.sun_family = AF_UNIX; + strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1); + + status = connect (sd, (struct sockaddr *) &sa, sizeof (sa)); + if (status != 0) + { + status = errno; + pthread_mutex_unlock (&lock); + return (status); + } + + sh = fdopen (sd, "w+"); + if (sh == NULL) + { + status = errno; + close (sd); + sd = -1; + pthread_mutex_unlock (&lock); + return (status); + } + + pthread_mutex_unlock (&lock); + + return (0); +} /* int rrdd_connect */ + +int rrdd_disconnect (void) +{ + int status; + + pthread_mutex_lock (&lock); + + if (sh == NULL) + { + pthread_mutex_unlock (&lock); + return (-1); + } + + status = fclose (sh); + if (status != 0) + status = errno; + + sh = NULL; + sd = -1; + + pthread_mutex_unlock (&lock); + + return (status); +} /* int rrdd_disconnect */ + +int rrdd_update (const char *filename, int values_num, + const char * const *values) +{ + pthread_mutex_lock (&lock); + + if (sh == NULL) + { + pthread_mutex_unlock (&lock); + return (-1); + } + + pthread_mutex_unlock (&lock); + + return (0); +} /* int rrd_update_daemon */ + +/* + * vim: set sw=2 sts=2 ts=8 et fdm=marker : + */ diff --git a/src/rrdc.c b/src/rrdc.c new file mode 100644 index 0000000..65c9912 --- /dev/null +++ b/src/rrdc.c @@ -0,0 +1,106 @@ +/** + * collectd - src/rrdc.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 + **/ + +#include "rrdd.h" +#include "rrdc.h" + +#include + +static void exit_usage (char *name) +{ + printf ("Usage: %s [options]\n" + "\n" + "Commands handled by rrdc:\n" + " update\n" + " help\n" + "\n" + "All other commands are passed to rrdtool(1).\n" + "\n", basename (name)); + exit (0); +} /* void exit_usage */ + +int main (int argc, char **argv) +{ + char *name = "rrdc"; + int status; + + if (argc > 0) + name = argv[0]; + + if ((argc < 2) + || (strcmp (argv[1], "help") == 0)) + exit_usage (name); + + /* rrdc update [ ..] */ + if ((argc >= 4) && (strcmp (argv[1], "update") == 0)) + { + status = rrdd_connect (RRDD_SOCK_PATH); + if (status != 0) + { + fprintf (stderr, "rrdd_connect failed: %s\n", + strerror (status)); + return (1); + } + + status = rrdd_update (argv[2], argc - 3, (void *) (argv + 3)); + if (status < 0) + { + fprintf (stderr, "rrdd_update failed.\n"); + status = 1; + } + else if (status > 0) + { + fprintf (stderr, "rrdd_update failed: %s\n", + strerror (status)); + status = 1; + } + + rrdd_disconnect (); + return (status); + } + else + { + char **argv_copy; + + fprintf (stdout, "RRDc 1.0.0 Copyright 2008 by Florian Forster " + "\n\n"); + fflush (stdout); + + /* Copy argv so we can assure that it is NULL terminated. */ + argv_copy = (char **) malloc (sizeof (char *) * (argc + 1)); + if (argv_copy == NULL) + { + fprintf (stderr, "malloc failed.\n"); + return (1); + } + memcpy (argv_copy, argv, sizeof (char *) * argc); + /* argv_copy[0] = "rrdtool"; */ + argv_copy[argc] = NULL; + + status = execvp ("rrdtool", argv_copy); + fprintf (stderr, "execv failed with status %i.\n", status); + return (1); + } +} /* int main */ + +/* + * vim: set sw=2 sts=2 ts=8 et fdm=marker : + */ diff --git a/src/rrdc.h b/src/rrdc.h new file mode 100644 index 0000000..94675d6 --- /dev/null +++ b/src/rrdc.h @@ -0,0 +1,31 @@ +/** + * collectd - src/rrdc.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 + **/ + +#ifndef __RRDC_H +#define __RRDC_H 1 + +int rrdd_connect (const char *path); +int rrdd_disconnect (void); + +int rrdd_update (const char *filename, int values_num, + const char * const *values); + +#endif /* __RRDC_H */ diff --git a/src/rrdd.c b/src/rrdd.c new file mode 100644 index 0000000..c9e5e3e --- /dev/null +++ b/src/rrdd.c @@ -0,0 +1,274 @@ +/** + * 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 + **/ + +#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 : + */ diff --git a/src/rrdd.h b/src/rrdd.h new file mode 100644 index 0000000..05c57ba --- /dev/null +++ b/src/rrdd.h @@ -0,0 +1,73 @@ +/** + * collectd - src/rrdd.h + * 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 + **/ + +#ifndef __RRDD_H +#define __RRDD_H 1 + +/* + * First tell the compiler to stick to the C99 and POSIX standards as close as + * possible. + */ +#ifndef __STRICT_ANSI__ +# define __STRICT_ANSI__ +#endif + +#ifndef _ISOC99_SOURCE +# define _ISOC99_SOURCE +#endif + +#ifdef _POSIX_C_SOURCE +# undef _POSIX_C_SOURCE +#endif +#define _POSIX_C_SOURCE 200112L + +#ifndef _REENTRANT +# define _REENTRANT +#endif + +#ifndef _THREAD_SAFE +# define _THREAD_SAFE +#endif + +/* + * Now include some common stuff. + */ +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define RRDD_SOCK_PATH "/tmp/rrdd.sock" + +#endif /* __RRDD_H */ -- 2.11.0