syslogd: make maximum message length configurable

Signed-off-by: Janne Kiviluoto <janne.kiviluoto@bluegiga.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

sysklogd/Config.in

@@ -50,6 +50,16 @@ config FEATURE_SYSLOGD_DUP
 	  Option -D instructs syslogd to drop consecutive messages
 	  which are totally the same.
 
+config FEATURE_SYSLOGD_READ_BUFFER_SIZE
+       int "Read buffer size in bytes"
+       default 256
+       range 256 20000
+       depends on SYSLOGD
+       help
+         This option sets the size of the syslog read buffer.
+         Actual memory usage increases around five times the
+         change done here.
+
 config FEATURE_IPC_SYSLOG
 	bool "Circular Buffer support"
 	default n

sysklogd/syslogd.c

@@ -46,7 +46,7 @@
 #undef SYSLOGD_WRLOCK
 
 enum {
-	MAX_READ = 256,
+	MAX_READ = CONFIG_FEATURE_SYSLOGD_READ_BUFFER_SIZE,
 	DNS_WAIT_SEC = 2 * 60,
 };