[lcd4linux @ 2004-03-14 07:11:42 by reinelt]

parameter count fixed for plugin_dvb()
plugin_APM (battery status) ported

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@401 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 196 insertions, 0 deletions

diff --git a/plugin_apm.c b/plugin_apm.c
new file mode 100644
index 0000000..6c58009
--- /dev/null
+++ b/plugin_apm.c
@@ -0,0 +1,196 @@
+/* $Id: plugin_apm.c,v 1.1 2004/03/14 07:11:42 reinelt Exp $
+ *
+ * plugin for APM (battery status)
+ *
+ * Copyright 2003 Michael Reinelt <reinelt@eunet.at>
+ * Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * based on the old 'battery.c' which is 
+ * Copyright 2001 Leopold Tötsch <lt@toetsch.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: plugin_apm.c,v $
+ * Revision 1.1  2004/03/14 07:11:42  reinelt
+ * parameter count fixed for plugin_dvb()
+ * plugin_APM (battery status) ported
+ *
+ */
+
+/* 
+ * exported functions:
+ *
+ * int plugin_init_apm (void)
+ *  adds apm() function
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <asm/types.h>
+
+#include "debug.h"
+#include "plugin.h"
+#include "hash.h"
+
+static int fd = -2;
+static HASH APM = { 0, };
+
+/* from /usr/src/linux/arch/i386/kernel/apm.c:
+ *
+ * Arguments, with symbols from linux/apm_bios.h.  Information is
+ * from the Get Power Status (0x0a) call unless otherwise noted.
+ *
+ * 0) Linux driver version (this will change if format changes)
+ * 1) APM BIOS Version.  Usually 1.0, 1.1 or 1.2.
+ * 2) APM flags from APM Installation Check (0x00):
+ *    bit 0: APM_16_BIT_SUPPORT
+ *    bit 1: APM_32_BIT_SUPPORT
+ *    bit 2: APM_IDLE_SLOWS_CLOCK
+ *    bit 3: APM_BIOS_DISABLED
+ *    bit 4: APM_BIOS_DISENGAGED
+ * 3) AC line status
+ *    0x00: Off-line
+ *    0x01: On-line
+ *    0x02: On backup power (BIOS >= 1.1 only)
+ *    0xff: Unknown
+ * 4) Battery status
+ *    0x00: High
+ *    0x01: Low
+ *    0x02: Critical
+ *    0x03: Charging
+ *    0x04: Selected battery not present (BIOS >= 1.2 only)
+ *    0xff: Unknown
+ * 5) Battery flag
+ *    bit 0: High
+ *    bit 1: Low
+ *    bit 2: Critical
+ *    bit 3: Charging
+ *    bit 7: No system battery
+ *    0xff: Unknown
+ * 6) Remaining battery life (percentage of charge):
+ *    0-100: valid
+ *    -1: Unknown
+ * 7) Remaining battery life (time units):
+ *    Number of remaining minutes or seconds
+ *    -1: Unknown
+ * 8) min = minutes; sec = seconds
+ *
+ * p+= sprintf(p, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
+ *             driver_version,
+ *             (apm_info.bios.version >> 8) & 0xff,
+ *             apm_info.bios.version & 0xff,
+ *             apm_info.bios.flags,
+ *             ac_line_status,
+ *             battery_status,
+ *             battery_flag,
+ *             percentage,
+ *             time_units,
+ *             units);
+ */
+
+
+static int parse_proc_apm (void)
+{
+  char *key[] = { "driver_version", 
+		  "bios_version", 
+		  "bios_flags", 
+		  "line_status",
+		  "battery_status",
+		  "battery_flag",
+		  "battery_percent",
+		  "battery_remaining",
+		  "time_units" }; 
+  
+  char buffer[128], *beg, *end; 
+  int age, i;
+
+  // reread every 10 msec only
+  age = hash_age (&APM, NULL, NULL);
+  if (age > 0 && age <= 10) return 0;
+  
+  if (fd == -2) {
+    fd = open("/proc/apm", O_RDONLY | O_NDELAY);
+    if (fd == -1) {
+      error ("open(/proc/apm) failed: %s", strerror(errno));
+      return -1;
+    }
+  }
+  
+  if (lseek(fd, 0L, SEEK_SET) != 0) {
+    error ("lseek(/proc/apm) failed: %s", strerror(errno));
+    fd = -1;
+    return -1;
+  }
+  
+  if (read (fd, &buffer, sizeof(buffer)-1) == -1) {
+    error ("read(/proc/apm) failed: %s", strerror(errno));
+    fd=-1;
+    return -1;
+  }
+  
+  beg = buffer;
+  for (i = 0; i < 9 && beg != NULL; i++) {
+    while (*beg == ' ') beg++; 
+    if ((end = strpbrk(beg, " \n"))) *end='\0'; 
+    hash_set (&APM, key[i], beg); 
+    beg = end ? end+1 : NULL;
+  }
+
+  
+  return 0;
+}
+
+
+static void my_apm (RESULT *result, RESULT *arg1)
+{
+  char *val;
+  
+  if (parse_proc_apm()<0) {
+    SetResult(&result, R_STRING, ""); 
+    return;
+  }
+
+  val=hash_get(&APM, R2S(arg1));
+  if (val==NULL) val="";
+
+  SetResult(&result, R_STRING, val); 
+}
+
+int plugin_init_apm (void)
+{
+  AddFunction ("apm", 1, my_apm);
+  return 0;
+}
+
+void plugin_exit_apm (void) 
+{
+  if (fd > -1) {
+    close (fd);
+  }
+  fd = -2;
+  hash_destroy(&APM);
+}