2 * collectd - src/serial.c
3 * Copyright (C) 2005,2006 David Bacher
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; either version 2 of the License, or (at your
8 * option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * David Bacher <drbacher at gmail.com>
21 * Florian octo Forster <octo at verplant.org>
28 #if defined(KERNEL_LINUX)
29 # define SERIAL_HAVE_READ 1
31 # define SERIAL_HAVE_READ 0
35 static void serial_submit (const char *type_instance,
36 counter_t rx, counter_t tx)
39 value_list_t vl = VALUE_LIST_INIT;
41 values[0].counter = rx;
42 values[1].counter = tx;
46 vl.time = time (NULL);
47 strcpy (vl.host, hostname_g);
48 strcpy (vl.plugin, "serial");
49 strncpy (vl.type_instance, type_instance,
50 sizeof (vl.type_instance));
52 plugin_dispatch_values ("serial_octets", &vl);
55 static int serial_read (void)
68 /* there are a variety of names for the serial device */
69 if ((fh = fopen ("/proc/tty/driver/serial", "r")) == NULL &&
70 (fh = fopen ("/proc/tty/driver/ttyS", "r")) == NULL)
73 WARNING ("serial: fopen: %s",
74 sstrerror (errno, errbuf, sizeof (errbuf)));
78 while (fgets (buffer, sizeof (buffer), fh) != NULL)
80 int have_rx = 0, have_tx = 0;
82 numfields = strsplit (buffer, fields, 16);
88 * 0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
89 * 1: uart:16550A port:000002F8 irq:3 tx:0 rx:0
91 len = strlen (fields[0]) - 1;
94 if (fields[0][len] != ':')
96 fields[0][len] = '\0';
98 for (i = 1; i < numfields; i++)
100 len = strlen (fields[i]);
104 if (strncmp (fields[i], "tx:", 3) == 0)
106 tx = atoll (fields[i] + 3);
109 else if (strncmp (fields[i], "rx:", 3) == 0)
111 rx = atoll (fields[i] + 3);
116 if ((have_rx == 0) || (have_tx == 0))
119 serial_submit (fields[0], rx, tx);
124 #endif /* KERNEL_LINUX */
125 } /* int serial_read */
126 #endif /* SERIAL_HAVE_READ */
128 void module_register (void)
131 plugin_register_read ("serial", serial_read);
132 #endif /* SERIAL_HAVE_READ */
133 } /* void module_register */