dtv-scan-tables.git - dtv-scan-tables Debian packaging

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Diffstat (limited to 'dvb-t/se-Tarnamo')

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/* $Id: plugin_netdev.c,v 1.14 2005/05/08 04:32:44 reinelt Exp $ * * plugin for /proc/net/dev parsing * * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at> * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: plugin_netdev.c,v $ * Revision 1.14 2005/05/08 04:32:44 reinelt * CodingStyle added and applied * * Revision 1.13 2005/01/18 06:30:23 reinelt * added (C) to all copyright statements * * Revision 1.12 2004/06/26 12:05:00 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.11 2004/06/26 09:27:21 reinelt * * added '-W' to CFLAGS * changed all C++ comments to C ones * cleaned up a lot of signed/unsigned mistakes * * Revision 1.10 2004/06/17 10:58:58 reinelt * * changed plugin_netdev to use the new fast hash model * * Revision 1.9 2004/06/17 06:23:43 reinelt * * hash handling rewritten to solve performance issues * * Revision 1.8 2004/05/27 03:39:47 reinelt * * changed function naming scheme to plugin::function * * Revision 1.7 2004/03/11 06:39:59 reinelt * big patch from Martin: * - reuse filehandles * - memory leaks fixed * - earlier busy-flag checking with HD44780 * - reuse memory for strings in RESULT and hash * - netdev_fast to wavid time-consuming regex * * Revision 1.6 2004/03/03 04:44:16 reinelt * changes (cosmetics?) to the big patch from Martin * hash patch un-applied * * Revision 1.5 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.4 2004/02/15 07:23:04 reinelt * bug in netdev parsing fixed * * Revision 1.3 2004/02/01 19:37:40 reinelt * got rid of every strtok() incarnation. * * Revision 1.2 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.1 2004/01/25 05:30:09 reinelt * plugin_netdev for parsing /proc/net/dev added * */ /* * exported functions: * * int plugin_init_netdev (void) * adds functions to access /proc/net/dev * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <ctype.h> #include <errno.h> #include "debug.h" #include "plugin.h" #include "qprintf.h" #include "hash.h" static HASH NetDev; static FILE *Stream = NULL; static char *DELIMITER = " :|\t\n"; static int parse_netdev(void) { int age; int row, col; static int first_time = 1; /* reread every 10 msec only */ age = hash_age(&NetDev, NULL); if (age > 0 && age <= 10) return 0; if (Stream == NULL) Stream = fopen("/proc/net/dev", "r"); if (Stream == NULL) { error("fopen(/proc/net/dev) failed: %s", strerror(errno)); return -1; } rewind(Stream); row = 0; while (!feof(Stream)) { char buffer[256]; char dev[16]; char *beg, *end; unsigned int len; if (fgets(buffer, sizeof(buffer), Stream) == NULL) break; switch (++row) { case 1: /* skip row 1 */ continue; case 2: /* row 2 used for headers */ if (first_time) { char *RxTx = strrchr(buffer, '|'); first_time = 0; col = 0; beg = buffer; while (beg) { char key[32]; while (strchr(DELIMITER, *beg)) beg++; if ((end = strpbrk(beg, DELIMITER)) != NULL) *end = '\0'; qprintf(key, sizeof(key), "%s_%s", beg < RxTx ? "Rx" : "Tx", beg); hash_set_column(&NetDev, col++, key); beg = end ? end + 1 : NULL; } } continue; default: /* fetch interface name (1st column) as key */ beg = buffer; while (*beg && *beg == ' ') beg++; end = beg + 1; while (*end && *end != ':') end++; len = end - beg; if (len >= sizeof(dev)) len = sizeof(dev) - 1; strncpy(dev, beg, len); dev[len] = '\0'; hash_put_delta(&NetDev, dev, buffer); } } return 0; } static void my_netdev(RESULT * result, RESULT * arg1, RESULT * arg2, RESULT * arg3) { char *dev, *key; int delay; double value; if (parse_netdev() < 0) { SetResult(&result, R_STRING, ""); return; } dev = R2S(arg1); key = R2S(arg2); delay = R2N(arg3); value = hash_get_regex(&NetDev, dev, key, delay); SetResult(&result, R_NUMBER, &value); } static void my_netdev_fast(RESULT * result, RESULT * arg1, RESULT * arg2, RESULT * arg3) { char *dev, *key; int delay; double value; if (parse_netdev() < 0) { SetResult(&result, R_STRING, ""); return; } dev = R2S(arg1); key = R2S(arg2); delay = R2N(arg3); value = hash_get_delta(&NetDev, dev, key, delay); SetResult(&result, R_NUMBER, &value); } int plugin_init_netdev(void) { hash_create(&NetDev); hash_set_delimiter(&NetDev, " :|\t\n"); AddFunction("netdev", 3, my_netdev); AddFunction("netdev::fast", 3, my_netdev_fast); return 0; } void plugin_exit_netdev(void) { if (Stream != NULL) { fclose(Stream); Stream = NULL; } hash_destroy(&NetDev); }


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