wmpower-0.4.3/src/power_management/apm/libapm.c

   1 /***************************************************************************
   2                           libapm.c  -  description
   3                              -------------------
   4     begin                : Feb 10 2003
   5     copyright            : (C) 2003 by Noberasco Michele
   6     e-mail               : 2001s098@educ.disi.unige.it
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.              *
  25  *                                                                         *
  26  ***************************************************************************/
  27
  28  /***************************************************************************
  29         Originally written by Filippo Panessa for his 'wmab' program
  30  ***************************************************************************/
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36
  37 #include "libapm.h"
  38
  39 int apm_read(struct_apm_data *i);
  40 int apm_exists();
  41
  42 /* Check to see if /proc/apm exists... */
  43 int apm_exists()
  44 {
  45     if (!access(APMDEV, R_OK)) return 1;
  46
  47         return 0;
  48 }
  49
  50 /* Read in the information found in /proc/apm... */
  51 int apm_read(struct_apm_data *i)
  52 {
  53   FILE  *str;
  54   char   units[10];
  55   char   buffer[100];
  56
  57   /* Open /proc/apm for reading */
  58   if (!(str = fopen(APMDEV, "r"))) return 0;
  59
  60   /* Scan in the information.... */
  61   fgets(buffer, sizeof(buffer) - 1, str);
  62   buffer[sizeof(buffer) - 1] = '\0';
  63   sscanf(buffer, "%s %d.%d %x %x %x %x %d%% %d %s\n",
  64     (char *)i->driver_version,
  65     &i->apm_version_major,
  66     &i->apm_version_minor,
  67           (unsigned int *) &i->apm_flags,
  68           (unsigned int *) &i->ac_line_status,
  69           (unsigned int *) &i->battery_status,
  70           (unsigned int *) &i->battery_flags,
  71           &i->battery_percentage,
  72           &i->battery_time,
  73           units
  74   );
  75   i->using_minutes = !strncmp(units, "min", 3) ? 1 : 0;
  76   /* Old Style */
  77   if (i->driver_version[0] == 'B')
  78         {
  79           strcpy((char *)i->driver_version, "pre-0.7");
  80           i->apm_version_major  = 0;
  81           i->apm_version_minor  = 0;
  82           i->apm_flags          = 0;
  83           i->ac_line_status     = 0xff;
  84           i->battery_status     = 0xff;
  85           i->battery_flags      = 0xff;
  86           i->battery_percentage = -1;
  87           i->battery_time       = -1;
  88           i->using_minutes      = 1;
  89           sscanf(buffer, "BIOS version: %d.%d", &i->apm_version_major, &i->apm_version_minor);
  90           fgets(buffer, sizeof(buffer) - 1, str);
  91           sscanf(buffer, "Flags: 0x%02x", (unsigned int *) &i->apm_flags);
  92           if (i->apm_flags & APM_32_BIT_SUPPORT)
  93                 {
  94             fgets(buffer, sizeof(buffer) - 1, str);
  95             fgets(buffer, sizeof(buffer) - 1, str);
  96             if (buffer[0] != 'P')
  97                         {
  98         if (!strncmp(buffer+4, "off line", 8))     i->ac_line_status = 0;
  99                     else if (!strncmp(buffer+4, "on line", 7)) i->ac_line_status = 1;
 100                     else if (!strncmp(buffer+4, "on back", 7)) i->ac_line_status = 2;
 101                     fgets(buffer, sizeof(buffer) - 1, str);
 102                     if (!strncmp(buffer+16, "high", 4))        i->battery_status = 0;
 103                     else if (!strncmp(buffer+16, "low", 3))    i->battery_status = 1;
 104                     else if (!strncmp(buffer+16, "crit", 4))   i->battery_status = 2;
 105                     else if (!strncmp(buffer+16, "charg", 5))  i->battery_status = 3;
 106                     fgets(buffer, sizeof(buffer) - 1, str);
 107                     if (strncmp(buffer+14, "unknown", 7))      i->battery_percentage = atoi(buffer + 14);
 108                     if (i->apm_version_major >= 1 && i->apm_version_minor >= 1)
 109                                 {
 110                       fgets(buffer, sizeof(buffer) - 1, str);
 111                       sscanf(buffer, "Battery flag: 0x%02x", (unsigned int *) &i->battery_flags);
 112                       fgets(buffer, sizeof(buffer) - 1, str);
 113                       if (strncmp(buffer+14, "unknown", 7))  i->battery_time = atoi(buffer + 14);
 114                     }
 115             }
 116           }
 117   }
 118
 119   /* Take care of battery percentages > 100% */
 120   if (i->battery_percentage > 100) i->battery_percentage = -1;
 121   fclose(str);
 122
 123         return 1;
 124 }