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/* $Id: parport.h,v 1.4 2003/10/05 17:58:50 reinelt Exp $
 *
 * generic parallel port handling
 *
 * Copyright 2003 Michael Reinelt <reinelt@eunet.at>
 *
 * 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: parport.h,v $
 * Revision 1.4  2003/10/05 17:58:50  reinelt
 * libtool junk; copyright messages cleaned up
 *
 * Revision 1.3  2003/08/15 07:54:07  reinelt
 * HD44780 4 bit mode implemented
 *
 * Revision 1.2  2003/04/07 06:03:10  reinelt
 * further parallel port abstraction
 *
 * Revision 1.1  2003/04/04 06:02:03  reinelt
 * new parallel port abstraction scheme
 *
 */

#ifndef _PARPORT_H_
#define _PARPORT_H_

int parport_open (void);
int parport_close (void);
unsigned char parport_wire_ctrl (char *name, unsigned char *deflt);
unsigned char parport_wire_data (char *name, unsigned char *deflt);
void parport_direction (int direction);
void parport_control (unsigned char mask, unsigned char value);
void parport_toggle (unsigned char bit, int level, int delay);
void parport_data (unsigned char data);
unsigned char parport_read (void);
void parport_debug(void);

#endif
gt; #include <ctype.h> #include <errno.h> #include "debug.h" #include "plugin.h" #include "hash.h" static HASH MemInfo; static FILE *stream = NULL; static int parse_meminfo(void) { int age; /* reread every 10 msec only */ age = hash_age(&MemInfo, NULL); if (age > 0 && age <= 10) return 0; if (stream == NULL) stream = fopen("/proc/meminfo", "r"); if (stream == NULL) { error("fopen(/proc/meminfo) failed: %s", strerror(errno)); return -1; } rewind(stream); while (!feof(stream)) { char buffer[256]; char *c, *key, *val; fgets(buffer, sizeof(buffer), stream); c = strchr(buffer, ':'); if (c == NULL) continue; key = buffer; val = c + 1; /* strip leading blanks from key */ while (isspace(*key)) *key++ = '\0'; /* strip trailing blanks from key */ do *c = '\0'; while (isspace(*--c)); /* strip leading blanks from value */ while (isspace(*val)) *val++ = '\0'; /* strip trailing blanks from value */ for (c = val; *c != '\0'; c++); while (isspace(*--c)) *c = '\0'; /* skip lines that do not end with " kB" */ if (*c == 'B' && *(c - 1) == 'k' && *(c - 2) == ' ') { /* strip trailing " kB" from value */ *(c - 2) = '\0'; /* add entry to hash table */ hash_put(&MemInfo, key, val); } } return 0; } static void my_meminfo(RESULT * result, RESULT * arg1) { char *key, *val; if (parse_meminfo() < 0) { SetResult(&result, R_STRING, ""); return; } key = R2S(arg1); val = hash_get(&MemInfo, key, NULL); if (val == NULL) val = ""; SetResult(&result, R_STRING, val); } int plugin_init_meminfo(void) { hash_create(&MemInfo); AddFunction("meminfo", 1, my_meminfo); return 0; } void plugin_exit_meminfo(void) { if (stream != NULL) { fclose(stream); stream = NULL; } hash_destroy(&MemInfo); }