lcd4linux.git - lcd4linux

Age	Commit message (Expand)	Author	Files	Lines
2003-02-27	[lcd4linux @ 2003-02-27 07:43:10 by reinelt]	reinelt	1	-1/+1
2000-03-10	[lcd4linux @ 2000-03-10 12:02:43 by reinelt]	reinelt	1	-0/+251

/* $Id: plugin_loadavg.c,v 1.3 2004/01/30 07:12:35 reinelt Exp $ * * plugin for load average * * Copyright 2003 Michael Reinelt <reinelt@eunet.at> * Copyright 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_loadavg.c,v $ * Revision 1.3 2004/01/30 07:12:35 reinelt * HD44780 busy-flag support from Martin Hejl * loadavg() uClibc replacement from Martin Heyl * round() uClibc replacement from Martin Hejl * warning in i2c_sensors fixed * [ * * Revision 1.2 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.1 2004/01/15 04:29:45 reinelt * moved lcd4linux.conf.sample to *.old * lcd4linux.conf.sample with new layout * new plugins 'loadavg' and 'meminfo' * text widget have pre- and postfix * */ /* * exported functions: * * int plugin_init_loadavg (void) * adds functions for load average * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include "debug.h" #include "plugin.h" #ifndef HAVE_GETLOADAVG int getloadavg (double loadavg[], int nelem) { static int fd=-2; char buf[65], *p; ssize_t nread; int i; if (fd==-2) fd = open ("/proc/loadavg", O_RDONLY); if (fd < 0) return -1; lseek(fd,0,SEEK_SET); nread = read (fd, buf, sizeof buf - 1); //close (fd); if (nread < 0) return -1; buf[nread - 1] = '\0'; if (nelem > 3) nelem = 3; p = buf; for (i = 0; i < nelem; ++i) { char *endp; loadavg[i] = strtod (p, &endp); if (endp == NULL || endp == p) /* This should not happen. The format of /proc/loadavg must have changed. Don't return with what we have, signal an error. */ return -1; p = endp; } return i; } #endif static void my_loadavg (RESULT *result, RESULT *arg1) { int nelem, index; double loadavg[3]; nelem=getloadavg(loadavg, 3); if (nelem<0) { error ("getloadavg() failed!"); SetResult(&result, R_STRING, ""); return; } index=R2N(arg1); if (index<1 || index>nelem) { error ("loadavg(%d): index out of range!", index); SetResult(&result, R_STRING, ""); return; } SetResult(&result, R_NUMBER, &(loadavg[index-1])); return; } int plugin_init_loadavg (void) { AddFunction ("loadavg", 1, my_loadavg); return 0; }