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 int rrdd_connect (const char *path)
63 struct sockaddr_un sa;
66 pthread_mutex_lock (&lock);
70 pthread_mutex_unlock (&lock);
74 sd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
78 pthread_mutex_unlock (&lock);
82 memset (&sa, 0, sizeof (sa));
83 sa.sun_family = AF_UNIX;
84 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
86 status = connect (sd, (struct sockaddr *) &sa, sizeof (sa));
90 pthread_mutex_unlock (&lock);
94 sh = fdopen (sd, "w+");
100 pthread_mutex_unlock (&lock);
104 pthread_mutex_unlock (&lock);
107 } /* int rrdd_connect */
109 int rrdd_disconnect (void)
113 pthread_mutex_lock (&lock);
117 pthread_mutex_unlock (&lock);
121 status = fclose (sh);
128 pthread_mutex_unlock (&lock);
131 } /* int rrdd_disconnect */
133 int rrdd_update (const char *filename, int values_num,
134 const char * const *values)
142 memset (buffer, 0, sizeof (buffer));
143 buffer_ptr = &buffer[0];
144 buffer_size = sizeof (buffer) - 1;
146 buffer_add_string ("update", &buffer_ptr, &buffer_size);
147 buffer_add_string (filename, &buffer_ptr, &buffer_size);
148 for (i = 0; i < values_num; i++)
149 buffer_add_value (values[i], &buffer_ptr, &buffer_size);
151 pthread_mutex_lock (&lock);
155 pthread_mutex_unlock (&lock);
159 status = write (sd, buffer, sizeof (buffer) - buffer_size);
161 status = read (sd, buffer, sizeof (buffer));
165 pthread_mutex_unlock (&lock);
168 else if (status == 0)
170 pthread_mutex_unlock (&lock);
174 status = atoi (buffer);
176 pthread_mutex_unlock (&lock);
179 } /* int rrd_update_daemon */
182 * vim: set sw=2 sts=2 ts=8 et fdm=marker :