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 #define SOCK_TEMPLATE "/tmp/rrdc.sock.XXXXXX"
27 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
31 static int buffer_add_string (const char *str,
32 char **buffer_ret, size_t *buffer_size_ret)
36 str_size = strlen (str) + 1;
38 if (*buffer_size_ret < str_size)
41 memcpy (*buffer_ret, str, str_size);
42 *buffer_ret += str_size;
43 *buffer_size_ret -= str_size;
46 } /* int buffer_add_string */
48 static int buffer_add_value (const char *value,
49 char **buffer_ret, size_t *buffer_size_ret)
53 if (strncmp (value, "N:", 2) == 0)
54 snprintf (temp, sizeof (temp), "%lu:%s",
55 (unsigned long) time (NULL), value + 2);
57 strncpy (temp, value, sizeof (temp));
58 temp[sizeof (temp) - 1] = 0;
60 return (buffer_add_string (temp, buffer_ret, buffer_size_ret));
61 } /* int buffer_add_value */
63 int rrdd_connect (const char *path)
65 struct sockaddr_un sa;
68 pthread_mutex_lock (&lock);
72 pthread_mutex_unlock (&lock);
76 sd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
80 pthread_mutex_unlock (&lock);
84 memset (&sa, 0, sizeof (sa));
85 sa.sun_family = AF_UNIX;
86 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
88 status = connect (sd, (struct sockaddr *) &sa, sizeof (sa));
92 pthread_mutex_unlock (&lock);
96 sh = fdopen (sd, "w+");
102 pthread_mutex_unlock (&lock);
106 pthread_mutex_unlock (&lock);
109 } /* int rrdd_connect */
111 int rrdd_disconnect (void)
115 pthread_mutex_lock (&lock);
119 pthread_mutex_unlock (&lock);
123 status = fclose (sh);
130 pthread_mutex_unlock (&lock);
133 } /* int rrdd_disconnect */
135 int rrdd_update (const char *filename, int values_num,
136 const char * const *values)
144 memset (buffer, 0, sizeof (buffer));
145 buffer_ptr = &buffer[0];
146 buffer_size = sizeof (buffer) - 1;
148 buffer_add_string (filename, &buffer_ptr, &buffer_size);
149 for (i = 0; i < values_num; i++)
150 buffer_add_value (values[i], &buffer_ptr, &buffer_size);
152 pthread_mutex_lock (&lock);
156 pthread_mutex_unlock (&lock);
160 status = write (sd, buffer, sizeof (buffer) - buffer_size);
162 pthread_mutex_unlock (&lock);
165 } /* int rrd_update_daemon */
168 * vim: set sw=2 sts=2 ts=8 et fdm=marker :