| 1 | #
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| 2 | # For a description of the syntax of this configuration file,
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| 3 | # see scripts/kbuild/config-language.txt.
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| 4 | #
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| 5 |
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| 6 | menu "System Logging Utilities"
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| 7 |
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| 8 | INSERT
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| 9 |
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| 10 | config SYSLOGD
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| 11 | bool "syslogd"
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| 12 | default y
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| 13 | help
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| 14 | The syslogd utility is used to record logs of all the
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| 15 | significant events that occur on a system. Every
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| 16 | message that is logged records the date and time of the
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| 17 | event, and will generally also record the name of the
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| 18 | application that generated the message. When used in
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| 19 | conjunction with klogd, messages from the Linux kernel
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| 20 | can also be recorded. This is terribly useful,
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| 21 | especially for finding what happened when something goes
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| 22 | wrong. And something almost always will go wrong if
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| 23 | you wait long enough....
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| 24 |
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| 25 | config FEATURE_ROTATE_LOGFILE
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| 26 | bool "Rotate message files"
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| 27 | default y
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| 28 | depends on SYSLOGD
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| 29 | help
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| 30 | This enables syslogd to rotate the message files
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| 31 | on his own. No need to use an external rotatescript.
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| 32 |
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| 33 | config FEATURE_REMOTE_LOG
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| 34 | bool "Remote Log support"
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| 35 | default y
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| 36 | depends on SYSLOGD
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| 37 | help
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| 38 | When you enable this feature, the syslogd utility can
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| 39 | be used to send system log messages to another system
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| 40 | connected via a network. This allows the remote
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| 41 | machine to log all the system messages, which can be
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| 42 | terribly useful for reducing the number of serial
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| 43 | cables you use. It can also be a very good security
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| 44 | measure to prevent system logs from being tampered with
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| 45 | by an intruder.
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| 46 |
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| 47 | config FEATURE_SYSLOGD_DUP
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| 48 | bool "Support -D (drop dups) option"
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| 49 | default y
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| 50 | depends on SYSLOGD
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| 51 | help
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| 52 | Option -D instructs syslogd to drop consecutive messages
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| 53 | which are totally the same.
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| 54 |
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| 55 | config FEATURE_SYSLOGD_CFG
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| 56 | bool "Support syslog.conf"
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| 57 | default y
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| 58 | depends on SYSLOGD
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| 59 | help
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| 60 | Supports restricted syslogd config. See docs/syslog.conf.txt
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| 61 |
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| 62 | config FEATURE_SYSLOGD_READ_BUFFER_SIZE
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| 63 | int "Read buffer size in bytes"
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| 64 | default 256
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| 65 | range 256 20000
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| 66 | depends on SYSLOGD
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| 67 | help
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| 68 | This option sets the size of the syslog read buffer.
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| 69 | Actual memory usage increases around five times the
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| 70 | change done here.
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| 71 |
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| 72 | config FEATURE_IPC_SYSLOG
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| 73 | bool "Circular Buffer support"
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| 74 | default y
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| 75 | depends on SYSLOGD
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| 76 | help
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| 77 | When you enable this feature, the syslogd utility will
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| 78 | use a circular buffer to record system log messages.
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| 79 | When the buffer is filled it will continue to overwrite
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| 80 | the oldest messages. This can be very useful for
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| 81 | systems with little or no permanent storage, since
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| 82 | otherwise system logs can eventually fill up your
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| 83 | entire filesystem, which may cause your system to
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| 84 | break badly.
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| 85 |
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| 86 | config FEATURE_IPC_SYSLOG_BUFFER_SIZE
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| 87 | int "Circular buffer size in Kbytes (minimum 4KB)"
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| 88 | default 16
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| 89 | range 4 2147483647
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| 90 | depends on FEATURE_IPC_SYSLOG
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| 91 | help
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| 92 | This option sets the size of the circular buffer
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| 93 | used to record system log messages.
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| 94 |
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| 95 | config LOGREAD
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| 96 | bool "logread"
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| 97 | default y
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| 98 | depends on FEATURE_IPC_SYSLOG
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| 99 | help
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| 100 | If you enabled Circular Buffer support, you almost
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| 101 | certainly want to enable this feature as well. This
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| 102 | utility will allow you to read the messages that are
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| 103 | stored in the syslogd circular buffer.
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| 104 |
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| 105 | config FEATURE_LOGREAD_REDUCED_LOCKING
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| 106 | bool "Double buffering"
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| 107 | default y
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| 108 | depends on LOGREAD
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| 109 | help
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| 110 | 'logread' ouput to slow serial terminals can have
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| 111 | side effects on syslog because of the semaphore.
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| 112 | This option make logread to double buffer copy
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| 113 | from circular buffer, minimizing semaphore
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| 114 | contention at some minor memory expense.
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| 115 |
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| 116 | config FEATURE_KMSG_SYSLOG
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| 117 | bool "Linux kernel printk buffer support"
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| 118 | default y
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| 119 | depends on SYSLOGD
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| 120 | select PLATFORM_LINUX
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| 121 | help
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| 122 | When you enable this feature, the syslogd utility will
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| 123 | write system log message to the Linux kernel's printk buffer.
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| 124 | This can be used as a smaller alternative to the syslogd IPC
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| 125 | support, as klogd and logread aren't needed.
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| 126 |
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| 127 | NOTICE: Syslog facilities in log entries needs kernel 3.5+.
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| 128 |
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| 129 | config KLOGD
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| 130 | bool "klogd"
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| 131 | default y
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| 132 | help
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| 133 | klogd is a utility which intercepts and logs all
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| 134 | messages from the Linux kernel and sends the messages
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| 135 | out to the 'syslogd' utility so they can be logged. If
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| 136 | you wish to record the messages produced by the kernel,
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| 137 | you should enable this option.
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| 138 |
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| 139 | comment "klogd should not be used together with syslog to kernel printk buffer"
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| 140 | depends on KLOGD && FEATURE_KMSG_SYSLOG
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| 141 |
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| 142 | config FEATURE_KLOGD_KLOGCTL
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| 143 | bool "Use the klogctl() interface"
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| 144 | default y
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| 145 | depends on KLOGD
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| 146 | select PLATFORM_LINUX
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| 147 | help
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| 148 | The klogd applet supports two interfaces for reading
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| 149 | kernel messages. Linux provides the klogctl() interface
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| 150 | which allows reading messages from the kernel ring buffer
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| 151 | independently from the file system.
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| 152 |
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| 153 | If you answer 'N' here, klogd will use the more portable
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| 154 | approach of reading them from /proc or a device node.
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| 155 | However, this method requires the file to be available.
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| 156 |
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| 157 | If in doubt, say 'Y'.
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| 158 |
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| 159 | config LOGGER
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| 160 | bool "logger"
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| 161 | default y
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| 162 | select FEATURE_SYSLOG
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| 163 | help
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| 164 | The logger utility allows you to send arbitrary text
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| 165 | messages to the system log (i.e. the 'syslogd' utility) so
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| 166 | they can be logged. This is generally used to help locate
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| 167 | problems that occur within programs and scripts.
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| 168 |
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| 169 | endmenu
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