2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
15 init is the first program run when the system boots.
17 config FEATURE_USE_INITTAB
18 bool "Support reading an inittab file"
22 Allow init to read an inittab file when the system boot.
24 config FEATURE_KILL_REMOVED
25 bool "Support killing processes that have been removed from inittab"
27 depends on FEATURE_USE_INITTAB
29 When respawn entries are removed from inittab and a SIGHUP is
30 sent to init, this option will make init kill the processes
31 that have been removed.
33 config FEATURE_KILL_DELAY
34 int "How long to wait between TERM and KILL (0 - send TERM only)" if FEATURE_KILL_REMOVED
37 depends on FEATURE_KILL_REMOVED
39 With nonzero setting, init sends TERM, forks, child waits N
40 seconds, sends KILL and exits. Setting it too high is unwise
41 (child will hang around for too long and could actually kill
44 config FEATURE_INIT_SCTTY
45 bool "Run commands with leading dash with controlling tty"
49 If this option is enabled, init will try to give a controlling
50 tty to any command which has leading hyphen (often it's "-/bin/sh").
51 More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)".
52 If device attached to STDIN_FILENO can be a ctty but is not yet
53 a ctty for other session, it will become this process' ctty.
54 This is not the traditional init behavour, but is often what you want
55 in an embedded system where the console is only accessed during
56 development or for maintenance.
57 NB: using cttyhack applet may work better.
59 config FEATURE_INIT_SYSLOG
60 bool "Enable init to write to syslog"
64 config FEATURE_EXTRA_QUIET
65 bool "Be _extra_ quiet on boot"
69 Prevent init from logging some messages to the console during boot.
71 config FEATURE_INIT_COREDUMPS
72 bool "Support dumping core for child processes (debugging only)"
76 If this option is enabled and the file /.init_enable_core
77 exists, then init will call setrlimit() to allow unlimited
78 core file sizes. If this option is disabled, processes
79 will not generate any core files.
82 bool "Support running init from within an initrd (not initramfs)"
86 Legacy support for running init under the old-style initrd. Allows
87 the name linuxrc to act as init, and it doesn't assume init is PID 1.
89 This does not apply to initramfs, which runs /init as PID 1 and
90 requires no special support.
92 config INIT_TERMINAL_TYPE
93 string "Initial terminal type"
97 This is the initial value set by init for the TERM environment
98 variable. This variable is used by programs which make use of
99 extended terminal capabilities.
101 Note that on Linux, init attempts to detect serial terminal and
102 sets TERM to "vt102" if one is found.
105 bool "poweroff, halt, and reboot"
108 Stop all processes and either halt, reboot, or power off the system.
110 config FEATURE_CALL_TELINIT
111 bool "Call telinit on shutdown and reboot"
113 depends on HALT && !INIT
115 Call an external program (normally telinit) to facilitate
116 a switch to a proper runlevel.
118 This option is only available if you selected halt and friends,
119 but did not select init.
122 string "Path to telinit executable"
123 default "/sbin/telinit"
124 depends on FEATURE_CALL_TELINIT
126 When busybox halt and friends have to call external telinit
127 to facilitate proper shutdown, this path is to be used when
128 locating telinit executable.
134 Mesg controls access to your terminal by others. It is typically
135 used to allow or disallow other users to write to your terminal