2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "System Logging Utilities"
14 The syslogd utility is used to record logs of all the
15 significant events that occur on a system. Every
16 message that is logged records the date and time of the
17 event, and will generally also record the name of the
18 application that generated the message. When used in
19 conjunction with klogd, messages from the Linux kernel
20 can also be recorded. This is terribly useful,
21 especially for finding what happened when something goes
22 wrong. And something almost always will go wrong if
23 you wait long enough....
25 config FEATURE_ROTATE_LOGFILE
26 bool "Rotate message files"
30 This enables syslogd to rotate the message files
31 on his own. No need to use an external rotatescript.
33 config FEATURE_REMOTE_LOG
34 bool "Remote Log support"
38 When you enable this feature, the syslogd utility can
39 be used to send system log messages to another system
40 connected via a network. This allows the remote
41 machine to log all the system messages, which can be
42 terribly useful for reducing the number of serial
43 cables you use. It can also be a very good security
44 measure to prevent system logs from being tampered with
47 config FEATURE_SYSLOGD_DUP
48 bool "Support -D (drop dups) option"
52 Option -D instructs syslogd to drop consecutive messages
53 which are totally the same.
55 config FEATURE_SYSLOGD_CFG
56 bool "Support syslog.conf"
60 Supports restricted syslogd config.
62 config FEATURE_SYSLOGD_READ_BUFFER_SIZE
63 int "Read buffer size in bytes"
68 This option sets the size of the syslog read buffer.
69 Actual memory usage increases around five times the
72 config FEATURE_IPC_SYSLOG
73 bool "Circular Buffer support"
77 When you enable this feature, the syslogd utility will
78 use a circular buffer to record system log messages.
79 When the buffer is filled it will continue to overwrite
80 the oldest messages. This can be very useful for
81 systems with little or no permanent storage, since
82 otherwise system logs can eventually fill up your
83 entire filesystem, which may cause your system to
86 config FEATURE_IPC_SYSLOG_BUFFER_SIZE
87 int "Circular buffer size in Kbytes (minimum 4KB)"
90 depends on FEATURE_IPC_SYSLOG
92 This option sets the size of the circular buffer
93 used to record system log messages.
98 depends on FEATURE_IPC_SYSLOG
100 If you enabled Circular Buffer support, you almost
101 certainly want to enable this feature as well. This
102 utility will allow you to read the messages that are
103 stored in the syslogd circular buffer.
105 config FEATURE_LOGREAD_REDUCED_LOCKING
106 bool "Double buffering"
110 'logread' ouput to slow serial terminals can have
111 side effects on syslog because of the semaphore.
112 This option make logread to double buffer copy
113 from circular buffer, minimizing semaphore
114 contention at some minor memory expense.
120 klogd is a utility which intercepts and logs all
121 messages from the Linux kernel and sends the messages
122 out to the 'syslogd' utility so they can be logged. If
123 you wish to record the messages produced by the kernel,
124 you should enable this option.
126 config FEATURE_KLOGD_KLOGCTL
127 bool "Use the klogctl() interface"
130 select PLATFORM_LINUX
132 The klogd applet supports two interfaces for reading
133 kernel messages. Linux provides the klogctl() interface
134 which allows reading messages from the kernel ring buffer
135 independently from the file system.
137 If you answer 'N' here, klogd will use the more portable
138 approach of reading them from /proc or a device node.
139 However, this method requires the file to be available.
141 If in doubt, say 'Y'.
146 select FEATURE_SYSLOG
148 The logger utility allows you to send arbitrary text
149 messages to the system log (i.e. the 'syslogd' utility) so
150 they can be logged. This is generally used to help locate
151 problems that occur within programs and scripts.