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Initial revision

    1: /*
    2:  * in_proc.c		       /proc/net/dev Input (Linux)
    3:  *
    4:  * Copyright (c) 2001-2004 Thomas Graf <tgraf@suug.ch>
    5:  *
    6:  * Permission is hereby granted, free of charge, to any person obtaining a
    7:  * copy of this software and associated documentation files (the "Software"),
    8:  * to deal in the Software without restriction, including without limitation
    9:  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   10:  * and/or sell copies of the Software, and to permit persons to whom the
   11:  * Software is furnished to do so, subject to the following conditions:
   12:  *
   13:  * The above copyright notice and this permission notice shall be included
   14:  * in all copies or substantial portions of the Software.
   15:  *
   16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   17:  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   21:  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   22:  * DEALINGS IN THE SOFTWARE.
   23:  */
   24: 
   25: #include <bmon/bmon.h>
   26: #include <bmon/input.h>
   27: #include <bmon/node.h>
   28: #include <bmon/item.h>
   29: #include <bmon/utils.h>
   30: #include <inttypes.h>
   31: 
   32: static char *c_path = "/proc/net/dev";
   33: 
   34: static void proc_read(void)
   35: {
   36: 	FILE *  fd;
   37: 	char    buf[512], *p, *s;
   38: 	int     w;
   39: 	item_t *it;
   40: 	
   41: 	if (!(fd = fopen(c_path, "r")))
   42: 		quit("Unable to open file %s: %s\n", c_path, strerror(errno));
   43: 	
   44: 	fgets(buf, sizeof(buf), fd);
   45: 	fgets(buf, sizeof(buf), fd);
   46: 	
   47: 	for (; fgets(buf, sizeof(buf), fd);) {
   48: 		b_cnt_t rx_errors, rx_drop, rx_fifo, rx_frame, rx_compressed;
   49: 		b_cnt_t rx_multicast, tx_errors, tx_drop, tx_fifo, tx_frame;
   50: 		b_cnt_t tx_compressed, tx_multicast, rx_bytes, tx_bytes;
   51: 		b_cnt_t rx_packets, tx_packets;
   52: 		
   53: 		if (buf[0] == '\r' || buf[0] == '\n')
   54: 			continue;
   55: 		
   56: 		if (!(p = strchr(buf, ':')))
   57: 			continue;
   58: 		*p = '\0';
   59: 		s = (p + 1);
   60: 		
   61: 		for (p = &buf[0]; *p == ' '; p++);
   62: 
   63: 		/*
   64: 		 * XXX: get_show_only_running
   65: 		 */
   66: 		
   67: 		if ((it = lookup_item(get_local_node(), p, 0, 0)) == NULL)
   68: 			continue;
   69: 		
   70: 		w = sscanf(s, "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
   71: 			      "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
   72: 			      "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " "
   73: 			      "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 "\n",
   74: 		    &rx_bytes, &rx_packets, &rx_errors, &rx_drop, &rx_fifo,
   75: 		    &rx_frame, &rx_compressed, &rx_multicast, &tx_bytes,
   76: 		    &tx_packets, &tx_errors, &tx_drop, &tx_fifo,
   77: 		    &tx_frame, &tx_compressed, &tx_multicast);
   78: 		
   79: 		if (w != 16)
   80: 			continue;
   81: 	
   82: 		it->i_major_attr = BYTES;
   83: 		it->i_minor_attr = PACKETS;
   84: 	
   85: 		update_attr(it, BYTES, rx_bytes, tx_bytes, RX_PROVIDED|TX_PROVIDED);
   86: 		update_attr(it, PACKETS, rx_packets, tx_packets, RX_PROVIDED|TX_PROVIDED);
   87: 		update_attr(it, ERRORS, rx_errors, tx_errors, RX_PROVIDED|TX_PROVIDED);
   88: 		update_attr(it, DROP, rx_drop, tx_drop, RX_PROVIDED|TX_PROVIDED);
   89: 		update_attr(it, FIFO, rx_fifo, tx_fifo, RX_PROVIDED|TX_PROVIDED);
   90: 		update_attr(it, FRAME, rx_frame, tx_frame, RX_PROVIDED|TX_PROVIDED);
   91: 		update_attr(it, COMPRESSED, rx_compressed, tx_compressed, RX_PROVIDED|TX_PROVIDED);
   92: 		update_attr(it, MULTICAST, rx_multicast, tx_multicast, RX_PROVIDED|TX_PROVIDED);
   93: 
   94: 		notify_update(it, NULL);
   95: 		increase_lifetime(it, 1);
   96: 	}
   97: 	
   98: 	fclose(fd);
   99: }
  100: 
  101: static void print_help(void)
  102: {
  103: 	printf(
  104: 	"proc - procfs statistic collector for Linux" \
  105: 	"\n" \
  106: 	"  Reads statistics from procfs (/proc/net/dev)\n" \
  107: 	"  Author: Thomas Graf <tgraf@suug.ch>\n" \
  108: 	"\n" \
  109: 	"  Options:\n" \
  110: 	"    file=PATH	    Path to statistics file (default: /proc/net/dev)\n");
  111: }
  112: 
  113: static void proc_set_opts(tv_t *attrs)
  114: {
  115: 	while (attrs) {
  116: 		if (!strcasecmp(attrs->type, "file") && attrs->value)
  117: 			c_path = attrs->value;
  118: 		else if (!strcasecmp(attrs->type, "help")) {
  119: 			print_help();
  120: 			exit(0);
  121: 		}
  122: 		attrs = attrs->next;
  123: 	}
  124: }
  125: 
  126: static int proc_probe(void)
  127: {
  128: 	FILE *fd = fopen(c_path, "r");
  129: 
  130: 	if (fd) {
  131: 		fclose(fd);
  132: 		return 1;
  133: 	}
  134: 	return 0;
  135: }
  136: 
  137: static struct input_module proc_ops = {
  138: 	.im_name = "proc",
  139: 	.im_read = proc_read,
  140: 	.im_set_opts = proc_set_opts,
  141: 	.im_probe = proc_probe,
  142: };
  143: 
  144: static void __init proc_init(void)
  145: {
  146: 	register_input_module(&proc_ops);
  147: }