Make acpid use syslog instead of its own logfile-writing mechanism.

From: Stefan Seyfried <seife@suse.de>

diff -ruN acpid-1.0.4~/acpid.c acpid-1.0.4/acpid.c
--- acpid-1.0.4~/acpid.c	2005-10-12 21:14:07.000000000 +0200
+++ acpid-1.0.4/acpid.c	2005-10-12 22:09:58.000000000 +0200
@@ -32,6 +32,7 @@
 #include <time.h>
 #include <sys/poll.h>
 #include <grp.h>
+#include <sys/syslog.h>
 
 #include "acpid.h"
 #include "ud_socket.h"
@@ -405,13 +406,17 @@
 			"/dev/null", strerror(errno));
 		return -1;
 	}
+#ifdef USE_SYSLOG
+	openlog("[acpid]", LOG_CONS, LOG_DAEMON);
+	logfd = nullfd;
+#else
 	logfd = open(logfile, O_WRONLY|O_CREAT|O_APPEND);
 	if (logfd < 0) {
 		fprintf(stderr, "%s: can't open %s: %s\n", progname, 
 			logfile, strerror(errno));
 		return -1;
 	}
-
+#endif
 	if (dup2(nullfd, STDIN_FILENO) != STDIN_FILENO) {
 		fprintf(stderr, "%s: dup2: %s\n", progname, strerror(errno));
 		return -1;
@@ -447,6 +452,20 @@
 	acpid_read_conf(confdir);
 }
 
+#ifdef USE_SYSLOG
+int
+acpid_log(const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	vsyslog(LOG_INFO, fmt, args);
+	va_end(args);
+
+	return 0;
+}
+
+#else
 int 
 acpid_log(const char *fmt, ...)
 {
@@ -465,6 +484,7 @@
 
 	return 0;
 }
+#endif
 
 /* 
  * This depends on fixes in linux ACPI after 2.4.8