diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Config.src | 127 | ||||
| -rw-r--r-- | init/Kbuild.src | 4 | ||||
| -rw-r--r-- | init/bootchartd.c | 4 | ||||
| -rw-r--r-- | init/halt.c | 62 | ||||
| -rw-r--r-- | init/init.c | 231 | ||||
| -rw-r--r-- | init/mesg.c | 18 |
6 files changed, 315 insertions, 131 deletions
diff --git a/init/Config.src b/init/Config.src index 2cac357..5767c93 100644 --- a/init/Config.src +++ b/init/Config.src @@ -7,131 +7,4 @@ menu "Init Utilities" INSERT -config INIT - bool "init" - default y - select FEATURE_SYSLOG - help - init is the first program run when the system boots. - -config FEATURE_USE_INITTAB - bool "Support reading an inittab file" - default y - depends on INIT - help - Allow init to read an inittab file when the system boot. - -config FEATURE_KILL_REMOVED - bool "Support killing processes that have been removed from inittab" - default n - depends on FEATURE_USE_INITTAB - help - When respawn entries are removed from inittab and a SIGHUP is - sent to init, this option will make init kill the processes - that have been removed. - -config FEATURE_KILL_DELAY - int "How long to wait between TERM and KILL (0 - send TERM only)" if FEATURE_KILL_REMOVED - range 0 1024 - default 0 - depends on FEATURE_KILL_REMOVED - help - With nonzero setting, init sends TERM, forks, child waits N - seconds, sends KILL and exits. Setting it too high is unwise - (child will hang around for too long and could actually kill - the wrong process!) - -config FEATURE_INIT_SCTTY - bool "Run commands with leading dash with controlling tty" - default y - depends on INIT - help - If this option is enabled, init will try to give a controlling - tty to any command which has leading hyphen (often it's "-/bin/sh"). - More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)". - If device attached to STDIN_FILENO can be a ctty but is not yet - a ctty for other session, it will become this process' ctty. - This is not the traditional init behavour, but is often what you want - in an embedded system where the console is only accessed during - development or for maintenance. - NB: using cttyhack applet may work better. - -config FEATURE_INIT_SYSLOG - bool "Enable init to write to syslog" - default y - depends on INIT - -config FEATURE_EXTRA_QUIET - bool "Be _extra_ quiet on boot" - default y - depends on INIT - help - Prevent init from logging some messages to the console during boot. - -config FEATURE_INIT_COREDUMPS - bool "Support dumping core for child processes (debugging only)" - default y - depends on INIT - help - If this option is enabled and the file /.init_enable_core - exists, then init will call setrlimit() to allow unlimited - core file sizes. If this option is disabled, processes - will not generate any core files. - -config FEATURE_INITRD - bool "Support running init from within an initrd (not initramfs)" - default y - depends on INIT - help - Legacy support for running init under the old-style initrd. Allows - the name linuxrc to act as init, and it doesn't assume init is PID 1. - - This does not apply to initramfs, which runs /init as PID 1 and - requires no special support. - -config INIT_TERMINAL_TYPE - string "Initial terminal type" - default "linux" - depends on INIT - help - This is the initial value set by init for the TERM environment - variable. This variable is used by programs which make use of - extended terminal capabilities. - - Note that on Linux, init attempts to detect serial terminal and - sets TERM to "vt102" if one is found. - -config HALT - bool "poweroff, halt, and reboot" - default y - help - Stop all processes and either halt, reboot, or power off the system. - -config FEATURE_CALL_TELINIT - bool "Call telinit on shutdown and reboot" - default y - depends on HALT && !INIT - help - Call an external program (normally telinit) to facilitate - a switch to a proper runlevel. - - This option is only available if you selected halt and friends, - but did not select init. - -config TELINIT_PATH - string "Path to telinit executable" - default "/sbin/telinit" - depends on FEATURE_CALL_TELINIT - help - When busybox halt and friends have to call external telinit - to facilitate proper shutdown, this path is to be used when - locating telinit executable. - -config MESG - bool "mesg" - default y - help - Mesg controls access to your terminal by others. It is typically - used to allow or disallow other users to write to your terminal - endmenu diff --git a/init/Kbuild.src b/init/Kbuild.src index 32dd5a0..6b4fb74 100644 --- a/init/Kbuild.src +++ b/init/Kbuild.src @@ -7,7 +7,3 @@ lib-y:= INSERT -lib-$(CONFIG_HALT) += halt.o -lib-$(CONFIG_INIT) += init.o -lib-$(CONFIG_MESG) += mesg.o -lib-$(CONFIG_BOOTCHARTD) += bootchartd.o diff --git a/init/bootchartd.c b/init/bootchartd.c index f14d5c0..5a1b3e8 100644 --- a/init/bootchartd.c +++ b/init/bootchartd.c @@ -3,6 +3,10 @@ * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//applet:IF_BOOTCHARTD(APPLET(bootchartd, _BB_DIR_SBIN, _BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_BOOTCHARTD) += bootchartd.o + //config:config BOOTCHARTD //config: bool "bootchartd" //config: default y diff --git a/init/halt.c b/init/halt.c index 903953e..47f1ef7 100644 --- a/init/halt.c +++ b/init/halt.c @@ -7,6 +7,68 @@ * Licensed under GPLv2, see file LICENSE in this source tree. */ +//applet:IF_HALT(APPLET(halt, _BB_DIR_SBIN, _BB_SUID_DROP)) +//applet:IF_HALT(APPLET_ODDNAME(poweroff, halt, _BB_DIR_SBIN, _BB_SUID_DROP, poweroff)) +//applet:IF_HALT(APPLET_ODDNAME(reboot, halt, _BB_DIR_SBIN, _BB_SUID_DROP, reboot)) + +//kbuild:lib-$(CONFIG_HALT) += halt.o + +//config:config HALT +//config: bool "poweroff, halt, and reboot" +//config: default y +//config: help +//config: Stop all processes and either halt, reboot, or power off the system. +//config: +//config:config FEATURE_CALL_TELINIT +//config: bool "Call telinit on shutdown and reboot" +//config: default y +//config: depends on HALT && !INIT +//config: help +//config: Call an external program (normally telinit) to facilitate +//config: a switch to a proper runlevel. +//config: +//config: This option is only available if you selected halt and friends, +//config: but did not select init. +//config: +//config:config TELINIT_PATH +//config: string "Path to telinit executable" +//config: default "/sbin/telinit" +//config: depends on FEATURE_CALL_TELINIT +//config: help +//config: When busybox halt and friends have to call external telinit +//config: to facilitate proper shutdown, this path is to be used when +//config: locating telinit executable. + +//usage:#define halt_trivial_usage +//usage: "[-d DELAY] [-n] [-f]" IF_FEATURE_WTMP(" [-w]") +//usage:#define halt_full_usage "\n\n" +//usage: "Halt the system\n" +//usage: "\nOptions:" +//usage: "\n -d SEC Delay interval" +//usage: "\n -n Do not sync" +//usage: "\n -f Force (don't go through init)" +//usage: IF_FEATURE_WTMP( +//usage: "\n -w Only write a wtmp record" +//usage: ) +//usage: +//usage:#define poweroff_trivial_usage +//usage: "[-d DELAY] [-n] [-f]" +//usage:#define poweroff_full_usage "\n\n" +//usage: "Halt and shut off power\n" +//usage: "\nOptions:" +//usage: "\n -d SEC Delay interval" +//usage: "\n -n Do not sync" +//usage: "\n -f Force (don't go through init)" +//usage: +//usage:#define reboot_trivial_usage +//usage: "[-d DELAY] [-n] [-f]" +//usage:#define reboot_full_usage "\n\n" +//usage: "Reboot the system\n" +//usage: "\nOptions:" +//usage: "\n -d SEC Delay interval" +//usage: "\n -n Do not sync" +//usage: "\n -f Force (don't go through init)" + #include "libbb.h" #include "reboot.h" diff --git a/init/init.c b/init/init.c index 5c0d114..340731b 100644 --- a/init/init.c +++ b/init/init.c @@ -9,6 +9,237 @@ * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//applet:IF_INIT(APPLET(init, _BB_DIR_SBIN, _BB_SUID_DROP)) +//applet:IF_FEATURE_INITRD(APPLET_ODDNAME(linuxrc, init, _BB_DIR_ROOT, _BB_SUID_DROP, linuxrc)) + +//kbuild:lib-$(CONFIG_INIT) += init.o + +//config:config INIT +//config: bool "init" +//config: default y +//config: select FEATURE_SYSLOG +//config: help +//config: init is the first program run when the system boots. +//config: +//config:config FEATURE_USE_INITTAB +//config: bool "Support reading an inittab file" +//config: default y +//config: depends on INIT +//config: help +//config: Allow init to read an inittab file when the system boot. +//config: +//config:config FEATURE_KILL_REMOVED +//config: bool "Support killing processes that have been removed from inittab" +//config: default n +//config: depends on FEATURE_USE_INITTAB +//config: help +//config: When respawn entries are removed from inittab and a SIGHUP is +//config: sent to init, this option will make init kill the processes +//config: that have been removed. +//config: +//config:config FEATURE_KILL_DELAY +//config: int "How long to wait between TERM and KILL (0 - send TERM only)" if FEATURE_KILL_REMOVED +//config: range 0 1024 +//config: default 0 +//config: depends on FEATURE_KILL_REMOVED +//config: help +//config: With nonzero setting, init sends TERM, forks, child waits N +//config: seconds, sends KILL and exits. Setting it too high is unwise +//config: (child will hang around for too long and could actually kill +//config: the wrong process!) +//config: +//config:config FEATURE_INIT_SCTTY +//config: bool "Run commands with leading dash with controlling tty" +//config: default y +//config: depends on INIT +//config: help +//config: If this option is enabled, init will try to give a controlling +//config: tty to any command which has leading hyphen (often it's "-/bin/sh"). +//config: More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)". +//config: If device attached to STDIN_FILENO can be a ctty but is not yet +//config: a ctty for other session, it will become this process' ctty. +//config: This is not the traditional init behavour, but is often what you want +//config: in an embedded system where the console is only accessed during +//config: development or for maintenance. +//config: NB: using cttyhack applet may work better. +//config: +//config:config FEATURE_INIT_SYSLOG +//config: bool "Enable init to write to syslog" +//config: default y +//config: depends on INIT +//config: +//config:config FEATURE_EXTRA_QUIET +//config: bool "Be _extra_ quiet on boot" +//config: default y +//config: depends on INIT +//config: help +//config: Prevent init from logging some messages to the console during boot. +//config: +//config:config FEATURE_INIT_COREDUMPS +//config: bool "Support dumping core for child processes (debugging only)" +//config: default y +//config: depends on INIT +//config: help +//config: If this option is enabled and the file /.init_enable_core +//config: exists, then init will call setrlimit() to allow unlimited +//config: core file sizes. If this option is disabled, processes +//config: will not generate any core files. +//config: +//config:config FEATURE_INITRD +//config: bool "Support running init from within an initrd (not initramfs)" +//config: default y +//config: depends on INIT +//config: help +//config: Legacy support for running init under the old-style initrd. Allows +//config: the name linuxrc to act as init, and it doesn't assume init is PID 1. +//config: +//config: This does not apply to initramfs, which runs /init as PID 1 and +//config: requires no special support. +//config: +//config:config INIT_TERMINAL_TYPE +//config: string "Initial terminal type" +//config: default "linux" +//config: depends on INIT +//config: help +//config: This is the initial value set by init for the TERM environment +//config: variable. This variable is used by programs which make use of +//config: extended terminal capabilities. +//config: +//config: Note that on Linux, init attempts to detect serial terminal and +//config: sets TERM to "vt102" if one is found. + +//usage:#define init_trivial_usage +//usage: "" +//usage:#define init_full_usage "\n\n" +//usage: "Init is the parent of all processes" +//usage: +//usage:#define init_notes_usage +//usage: "This version of init is designed to be run only by the kernel.\n" +//usage: "\n" +//usage: "BusyBox init doesn't support multiple runlevels. The runlevels field of\n" +//usage: "the /etc/inittab file is completely ignored by BusyBox init. If you want\n" +//usage: "runlevels, use sysvinit.\n" +//usage: "\n" +//usage: "BusyBox init works just fine without an inittab. If no inittab is found,\n" +//usage: "it has the following default behavior:\n" +//usage: "\n" +//usage: " ::sysinit:/etc/init.d/rcS\n" +//usage: " ::askfirst:/bin/sh\n" +//usage: " ::ctrlaltdel:/sbin/reboot\n" +//usage: " ::shutdown:/sbin/swapoff -a\n" +//usage: " ::shutdown:/bin/umount -a -r\n" +//usage: " ::restart:/sbin/init\n" +//usage: "\n" +//usage: "if it detects that /dev/console is _not_ a serial console, it will also run:\n" +//usage: "\n" +//usage: " tty2::askfirst:/bin/sh\n" +//usage: " tty3::askfirst:/bin/sh\n" +//usage: " tty4::askfirst:/bin/sh\n" +//usage: "\n" +//usage: "If you choose to use an /etc/inittab file, the inittab entry format is as follows:\n" +//usage: "\n" +//usage: " <id>:<runlevels>:<action>:<process>\n" +//usage: "\n" +//usage: " <id>:\n" +//usage: "\n" +//usage: " WARNING: This field has a non-traditional meaning for BusyBox init!\n" +//usage: " The id field is used by BusyBox init to specify the controlling tty for\n" +//usage: " the specified process to run on. The contents of this field are\n" +//usage: " appended to \"/dev/\" and used as-is. There is no need for this field to\n" +//usage: " be unique, although if it isn't you may have strange results. If this\n" +//usage: " field is left blank, the controlling tty is set to the console. Also\n" +//usage: " note that if BusyBox detects that a serial console is in use, then only\n" +//usage: " entries whose controlling tty is either the serial console or /dev/null\n" +//usage: " will be run. BusyBox init does nothing with utmp. We don't need no\n" +//usage: " stinkin' utmp.\n" +//usage: "\n" +//usage: " <runlevels>:\n" +//usage: "\n" +//usage: " The runlevels field is completely ignored.\n" +//usage: "\n" +//usage: " <action>:\n" +//usage: "\n" +//usage: " Valid actions include: sysinit, respawn, askfirst, wait,\n" +//usage: " once, restart, ctrlaltdel, and shutdown.\n" +//usage: "\n" +//usage: " The available actions can be classified into two groups: actions\n" +//usage: " that are run only once, and actions that are re-run when the specified\n" +//usage: " process exits.\n" +//usage: "\n" +//usage: " Run only-once actions:\n" +//usage: "\n" +//usage: " 'sysinit' is the first item run on boot. init waits until all\n" +//usage: " sysinit actions are completed before continuing. Following the\n" +//usage: " completion of all sysinit actions, all 'wait' actions are run.\n" +//usage: " 'wait' actions, like 'sysinit' actions, cause init to wait until\n" +//usage: " the specified task completes. 'once' actions are asynchronous,\n" +//usage: " therefore, init does not wait for them to complete. 'restart' is\n" +//usage: " the action taken to restart the init process. By default this should\n" +//usage: " simply run /sbin/init, but can be a script which runs pivot_root or it\n" +//usage: " can do all sorts of other interesting things. The 'ctrlaltdel' init\n" +//usage: " actions are run when the system detects that someone on the system\n" +//usage: " console has pressed the CTRL-ALT-DEL key combination. Typically one\n" +//usage: " wants to run 'reboot' at this point to cause the system to reboot.\n" +//usage: " Finally the 'shutdown' action specifies the actions to taken when\n" +//usage: " init is told to reboot. Unmounting filesystems and disabling swap\n" +//usage: " is a very good here.\n" +//usage: "\n" +//usage: " Run repeatedly actions:\n" +//usage: "\n" +//usage: " 'respawn' actions are run after the 'once' actions. When a process\n" +//usage: " started with a 'respawn' action exits, init automatically restarts\n" +//usage: " it. Unlike sysvinit, BusyBox init does not stop processes from\n" +//usage: " respawning out of control. The 'askfirst' actions acts just like\n" +//usage: " respawn, except that before running the specified process it\n" +//usage: " displays the line \"Please press Enter to activate this console.\"\n" +//usage: " and then waits for the user to press enter before starting the\n" +//usage: " specified process.\n" +//usage: "\n" +//usage: " Unrecognized actions (like initdefault) will cause init to emit an\n" +//usage: " error message, and then go along with its business. All actions are\n" +//usage: " run in the order they appear in /etc/inittab.\n" +//usage: "\n" +//usage: " <process>:\n" +//usage: "\n" +//usage: " Specifies the process to be executed and its command line.\n" +//usage: "\n" +//usage: "Example /etc/inittab file:\n" +//usage: "\n" +//usage: " # This is run first except when booting in single-user mode\n" +//usage: " #\n" +//usage: " ::sysinit:/etc/init.d/rcS\n" +//usage: " \n" +//usage: " # /bin/sh invocations on selected ttys\n" +//usage: " #\n" +//usage: " # Start an \"askfirst\" shell on the console (whatever that may be)\n" +//usage: " ::askfirst:-/bin/sh\n" +//usage: " # Start an \"askfirst\" shell on /dev/tty2-4\n" +//usage: " tty2::askfirst:-/bin/sh\n" +//usage: " tty3::askfirst:-/bin/sh\n" +//usage: " tty4::askfirst:-/bin/sh\n" +//usage: " \n" +//usage: " # /sbin/getty invocations for selected ttys\n" +//usage: " #\n" +//usage: " tty4::respawn:/sbin/getty 38400 tty4\n" +//usage: " tty5::respawn:/sbin/getty 38400 tty5\n" +//usage: " \n" +//usage: " \n" +//usage: " # Example of how to put a getty on a serial line (for a terminal)\n" +//usage: " #\n" +//usage: " #::respawn:/sbin/getty -L ttyS0 9600 vt100\n" +//usage: " #::respawn:/sbin/getty -L ttyS1 9600 vt100\n" +//usage: " #\n" +//usage: " # Example how to put a getty on a modem line\n" +//usage: " #::respawn:/sbin/getty 57600 ttyS2\n" +//usage: " \n" +//usage: " # Stuff to do when restarting the init process\n" +//usage: " ::restart:/sbin/init\n" +//usage: " \n" +//usage: " # Stuff to do before rebooting\n" +//usage: " ::ctrlaltdel:/sbin/reboot\n" +//usage: " ::shutdown:/bin/umount -a -r\n" +//usage: " ::shutdown:/sbin/swapoff -a\n" + #include "libbb.h" #include <syslog.h> #include <paths.h> diff --git a/init/mesg.c b/init/mesg.c index ef5f0eb..b560df2 100644 --- a/init/mesg.c +++ b/init/mesg.c @@ -7,6 +7,24 @@ * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//applet:IF_MESG(APPLET(mesg, _BB_DIR_USR_BIN, _BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_MESG) += mesg.o + +//config:config MESG +//config: bool "mesg" +//config: default y +//config: help +//config: Mesg controls access to your terminal by others. It is typically +//config: used to allow or disallow other users to write to your terminal + +//usage:#define mesg_trivial_usage +//usage: "[y|n]" +//usage:#define mesg_full_usage "\n\n" +//usage: "Control write access to your terminal\n" +//usage: " y Allow write access to your terminal\n" +//usage: " n Disallow write access to your terminal" + #include "libbb.h" #ifdef USE_TTY_GROUP |