2 * collectd - src/rrdc.c
3 * Copyright (C) 2008 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
29 static int buffer_add_string (const char *str,
30 char **buffer_ret, size_t *buffer_size_ret)
34 str_size = strlen (str) + 1;
36 if (*buffer_size_ret < str_size)
39 memcpy (*buffer_ret, str, str_size);
40 *buffer_ret += str_size;
41 *buffer_size_ret -= str_size;
44 } /* int buffer_add_string */
46 static int buffer_add_value (const char *value,
47 char **buffer_ret, size_t *buffer_size_ret)
51 if (strncmp (value, "N:", 2) == 0)
52 snprintf (temp, sizeof (temp), "%lu:%s",
53 (unsigned long) time (NULL), value + 2);
55 strncpy (temp, value, sizeof (temp));
56 temp[sizeof (temp) - 1] = 0;
58 return (buffer_add_string (temp, buffer_ret, buffer_size_ret));
59 } /* int buffer_add_value */
61 static int rrdd_connect_unix (const char *path)
63 struct sockaddr_un sa;
67 path = RRDD_SOCK_PATH;
69 pthread_mutex_lock (&lock);
73 pthread_mutex_unlock (&lock);
77 sd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
81 pthread_mutex_unlock (&lock);
85 memset (&sa, 0, sizeof (sa));
86 sa.sun_family = AF_UNIX;
87 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
89 status = connect (sd, (struct sockaddr *) &sa, sizeof (sa));
93 pthread_mutex_unlock (&lock);
97 sh = fdopen (sd, "w+");
103 pthread_mutex_unlock (&lock);
107 pthread_mutex_unlock (&lock);
110 } /* int rrdd_connect_unix */
112 int rrdd_connect (const char *addr)
114 struct addrinfo ai_hints;
115 struct addrinfo *ai_res;
116 struct addrinfo *ai_ptr;
120 addr = RRDD_SOCK_PATH;
122 if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
123 return (rrdd_connect_unix (addr + strlen ("unix:")));
124 else if (addr[0] == '/')
125 return (rrdd_connect_unix (addr));
127 pthread_mutex_lock (&lock);
131 pthread_mutex_unlock (&lock);
135 memset (&ai_hints, 0, sizeof (ai_hints));
136 ai_hints.ai_flags = 0;
138 ai_hints.ai_flags |= AI_ADDRCONFIG;
140 ai_hints.ai_family = AF_UNSPEC;
141 ai_hints.ai_socktype = SOCK_STREAM;
144 status = getaddrinfo (addr, DEFAULT_PORT, &ai_hints, &ai_res);
147 pthread_mutex_unlock (&lock);
151 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
153 sd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
161 status = connect (sd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
170 sh = fdopen (sd, "w+");
179 assert (status == 0);
182 pthread_mutex_unlock (&lock);
185 } /* int rrdd_connect */
187 int rrdd_disconnect (void)
191 pthread_mutex_lock (&lock);
195 pthread_mutex_unlock (&lock);
199 status = fclose (sh);
206 pthread_mutex_unlock (&lock);
209 } /* int rrdd_disconnect */
211 int rrdd_update (const char *filename, int values_num,
212 const char * const *values)
220 memset (buffer, 0, sizeof (buffer));
221 buffer_ptr = &buffer[0];
222 buffer_size = sizeof (buffer) - 1;
224 buffer_add_string ("update", &buffer_ptr, &buffer_size);
225 buffer_add_string (filename, &buffer_ptr, &buffer_size);
226 for (i = 0; i < values_num; i++)
227 buffer_add_value (values[i], &buffer_ptr, &buffer_size);
229 pthread_mutex_lock (&lock);
233 pthread_mutex_unlock (&lock);
237 status = write (sd, buffer, sizeof (buffer) - buffer_size);
239 status = read (sd, buffer, sizeof (buffer));
243 pthread_mutex_unlock (&lock);
246 else if (status == 0)
248 pthread_mutex_unlock (&lock);
252 status = atoi (buffer);
254 pthread_mutex_unlock (&lock);
257 } /* int rrd_update_daemon */
260 * vim: set sw=2 sts=2 ts=8 et fdm=marker :