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1#
2# For a description of the syntax of this configuration file,
3# see scripts/kbuild/config-language.txt.
4#
5
6menu "Init Utilities"
7
8config INIT
9 bool "init"
10 default n
11 select FEATURE_SYSLOG
12 help
13 init is the first program run when the system boots.
14
15config FEATURE_USE_INITTAB
16 bool "Support reading an inittab file"
17 default y
18 depends on INIT
19 help
20 Allow init to read an inittab file when the system boot.
21
22config FEATURE_KILL_REMOVED
23 bool "Support killing processes that have been removed from inittab"
24 default y
25 depends on FEATURE_USE_INITTAB
26 help
27 When respawn entries are removed from inittab and a SIGHUP is
28 sent to init, this feature will kill the processes that have
29 been removed.
30
31config FEATURE_KILL_DELAY
32 int "How long to wait between TERM and KILL (0 - send TERM only)" if FEATURE_KILL_REMOVED
33 range 0 1024
34 default 0
35 depends on FEATURE_KILL_REMOVED
36 help
37 With nonzero setting, init sends TERM, forks, child waits N
38 seconds, sends KILL and exits. Setting it too high is unwise
39 (child will hang around for too long and could actually kill
40 the wrong process!)
41
42config FEATURE_INIT_SCTTY
43 bool "Run commands with leading dash with controlling tty"
44 default n
45 depends on INIT
46 help
47 If this option is enabled, init will try to give a controlling
48 tty to any command which has leading hyphen (often it's "-/bin/sh").
49 More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)".
50 If device attached to STDIN_FILENO can be a ctty but is not yet
51 a ctty for other session, it will become this process' ctty.
52 This is not the traditional init behavour, but is often what you want
53 in an embedded system where the console is only accessed during
54 development or for maintenance.
55 NB: using cttyhack applet may work better.
56
57config FEATURE_INIT_SYSLOG
58 bool "Enable init to write to syslog"
59 default n
60 depends on INIT
61
62config FEATURE_EXTRA_QUIET
63 bool "Be _extra_ quiet on boot"
64 default y
65 depends on INIT
66 help
67 Prevent init from logging some messages to the console during boot.
68
69config FEATURE_INIT_COREDUMPS
70 bool "Support dumping core for child processes (debugging only)"
71 default n
72 depends on INIT
73 help
74 If this option is enabled and the file /.init_enable_core
75 exists, then init will call setrlimit() to allow unlimited
76 core file sizes. If this option is disabled, processes
77 will not generate any core files.
78
79config FEATURE_INITRD
80 bool "Support running init from within an initrd (not initramfs)"
81 default y
82 depends on INIT
83 help
84 Legacy support for running init under the old-style initrd. Allows
85 the name linuxrc to act as init, and it doesn't assume init is PID 1.
86
87 This does not apply to initramfs, which runs /init as PID 1 and
88 requires no special support.
89
90config HALT
91 bool "poweroff, halt, and reboot"
92 default n
93 help
94 Stop all processes and either halt, reboot, or power off the system.
95
96config FEATURE_CALL_TELINIT
97 bool "Call telinit on shutdown and reboot"
98 default n
99 depends on HALT && !INIT
100 help
101 Call an external program (normally telinit) to facilitate
102 a switch to a proper runlevel.
103
104 This option is only available if you selected halt and friends,
105 but did not select init.
106
107config TELINIT_PATH
108 string "Path to telinit executable"
109 default "/sbin/telinit"
110 depends on FEATURE_CALL_TELINIT
111 help
112 When busybox halt and friends have to call external telinit
113 to facilitate proper shutdown, this path is to be used when
114 locating telinit executable.
115
116config MESG
117 bool "mesg"
118 default n
119 help
120 Mesg controls access to your terminal by others. It is typically
121 used to allow or disallow other users to write to your terminal
122
123config BOOTCHARTD
124 bool "bootchartd"
125 default n
126 help
127 bootchartd is commonly used to profile the boot process
128 for the purpose of speeding it up. In this case, it is started
129 by the kernel as the init process. This is configured by adding
130 the init=/sbin/bootchartd option to the kernel command line.
131
132 It can also be used to monitor the resource usage of a specific
133 application or the running system in general. In this case,
134 bootchartd is started interactively by running bootchartd start
135 and stopped using bootchartd stop.
136
137endmenu