diff options
| -rw-r--r-- | include/applets.src.h | 7 | ||||
| -rw-r--r-- | include/usage.src.h | 169 | ||||
| -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 |
8 files changed, 315 insertions, 307 deletions
diff --git a/include/applets.src.h b/include/applets.src.h index 6a14a6588..545d3c5c2 100644 --- a/include/applets.src.h +++ b/include/applets.src.h @@ -72,7 +72,6 @@ IF_BASENAME(APPLET_NOFORK(basename, basename, _BB_DIR_USR_BIN, _BB_SUID_DROP, ba IF_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_DROP)) IF_BEEP(APPLET(beep, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_BLKID(APPLET(blkid, _BB_DIR_SBIN, _BB_SUID_DROP)) -IF_BOOTCHARTD(APPLET(bootchartd, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_BRCTL(APPLET(brctl, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) IF_BZIP2(APPLET(bzip2, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_CAL(APPLET(cal, _BB_DIR_USR_BIN, _BB_SUID_DROP)) @@ -165,7 +164,6 @@ IF_GETSEBOOL(APPLET(getsebool, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) IF_GETTY(APPLET(getty, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_GUNZIP(APPLET(gunzip, _BB_DIR_BIN, _BB_SUID_DROP)) IF_GZIP(APPLET(gzip, _BB_DIR_BIN, _BB_SUID_DROP)) -IF_HALT(APPLET(halt, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_HD(APPLET_NOEXEC(hd, hexdump, _BB_DIR_USR_BIN, _BB_SUID_DROP, hd)) IF_HDPARM(APPLET(hdparm, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_HEAD(APPLET_NOEXEC(head, head, _BB_DIR_USR_BIN, _BB_SUID_DROP, head)) @@ -181,7 +179,6 @@ IF_IFENSLAVE(APPLET(ifenslave, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_IFPLUGD(APPLET(ifplugd, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_IFUPDOWN(APPLET_ODDNAME(ifup, ifupdown, _BB_DIR_SBIN, _BB_SUID_DROP, ifup)) IF_INETD(APPLET(inetd, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) -IF_INIT(APPLET(init, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_INOTIFYD(APPLET(inotifyd, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_INSMOD(APPLET(insmod, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, _BB_DIR_SBIN, _BB_SUID_DROP, modprobe)) @@ -212,7 +209,6 @@ IF_LENGTH(APPLET_NOFORK(length, length, _BB_DIR_USR_BIN, _BB_SUID_DROP, length)) IF_LESS(APPLET(less, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_SETARCH(APPLET_ODDNAME(linux32, setarch, _BB_DIR_BIN, _BB_SUID_DROP, linux32)) IF_SETARCH(APPLET_ODDNAME(linux64, setarch, _BB_DIR_BIN, _BB_SUID_DROP, linux64)) -IF_FEATURE_INITRD(APPLET_ODDNAME(linuxrc, init, _BB_DIR_ROOT, _BB_SUID_DROP, linuxrc)) IF_LN(APPLET_NOEXEC(ln, ln, _BB_DIR_BIN, _BB_SUID_DROP, ln)) IF_LOAD_POLICY(APPLET(load_policy, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) IF_LOADFONT(APPLET(loadfont, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) @@ -241,7 +237,6 @@ IF_MAN(APPLET(man, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_MATCHPATHCON(APPLET(matchpathcon, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) IF_MD5SUM(APPLET_NOEXEC(md5sum, md5_sha1_sum, _BB_DIR_USR_BIN, _BB_SUID_DROP, md5sum)) IF_MDEV(APPLET(mdev, _BB_DIR_SBIN, _BB_SUID_DROP)) -IF_MESG(APPLET(mesg, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_MICROCOM(APPLET(microcom, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_MKDIR(APPLET_NOFORK(mkdir, mkdir, _BB_DIR_BIN, _BB_SUID_DROP, mkdir)) IF_MKFS_VFAT(APPLET_ODDNAME(mkdosfs, mkfs_vfat, _BB_DIR_SBIN, _BB_SUID_DROP, mkfs_vfat)) @@ -284,7 +279,6 @@ IF_PIPE_PROGRESS(APPLET(pipe_progress, _BB_DIR_BIN, _BB_SUID_DROP)) IF_PIVOT_ROOT(APPLET(pivot_root, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_PKILL(APPLET_ODDNAME(pkill, pgrep, _BB_DIR_USR_BIN, _BB_SUID_DROP, pkill)) IF_POPMAILDIR(APPLET(popmaildir, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) -IF_HALT(APPLET_ODDNAME(poweroff, halt, _BB_DIR_SBIN, _BB_SUID_DROP, poweroff)) IF_PRINTENV(APPLET_NOFORK(printenv, printenv, _BB_DIR_BIN, _BB_SUID_DROP, printenv)) IF_PRINTF(APPLET_NOFORK(printf, printf, _BB_DIR_USR_BIN, _BB_SUID_DROP, printf)) IF_PS(APPLET(ps, _BB_DIR_BIN, _BB_SUID_DROP)) @@ -297,7 +291,6 @@ IF_READAHEAD(APPLET(readahead, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_READLINK(APPLET(readlink, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_READPROFILE(APPLET(readprofile, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) IF_REALPATH(APPLET(realpath, _BB_DIR_USR_BIN, _BB_SUID_DROP)) -IF_HALT(APPLET_ODDNAME(reboot, halt, _BB_DIR_SBIN, _BB_SUID_DROP, reboot)) IF_REFORMIME(APPLET(reformime, _BB_DIR_BIN, _BB_SUID_DROP)) IF_RENICE(APPLET(renice, _BB_DIR_USR_BIN, _BB_SUID_DROP)) IF_RESET(APPLET(reset, _BB_DIR_USR_BIN, _BB_SUID_DROP)) diff --git a/include/usage.src.h b/include/usage.src.h index 555250366..084427cc0 100644 --- a/include/usage.src.h +++ b/include/usage.src.h @@ -1515,36 +1515,6 @@ INSERT "$ ls -la /tmp/busybox*\n" \ "-rw-rw-r-- 1 andersen andersen 554058 Apr 14 17:49 /tmp/busybox.tar.gz\n" -#define halt_trivial_usage \ - "[-d DELAY] [-n] [-f]" IF_FEATURE_WTMP(" [-w]") -#define halt_full_usage "\n\n" \ - "Halt the system\n" \ - "\nOptions:" \ - "\n -d SEC Delay interval" \ - "\n -n Do not sync" \ - "\n -f Force (don't go through init)" \ - IF_FEATURE_WTMP( \ - "\n -w Only write a wtmp record" \ - ) - -#define poweroff_trivial_usage \ - "[-d DELAY] [-n] [-f]" -#define poweroff_full_usage "\n\n" \ - "Halt and shut off power\n" \ - "\nOptions:" \ - "\n -d SEC Delay interval" \ - "\n -n Do not sync" \ - "\n -f Force (don't go through init)" \ - -#define reboot_trivial_usage \ - "[-d DELAY] [-n] [-f]" -#define reboot_full_usage "\n\n" \ - "Reboot the system\n" \ - "\nOptions:" \ - "\n -d SEC Delay interval" \ - "\n -n Do not sync" \ - "\n -f Force (don't go through init)" \ - #define hdparm_trivial_usage \ "[OPTIONS] [DEVICE]" #define hdparm_full_usage "\n\n" \ @@ -1863,138 +1833,6 @@ INSERT "\n -R N Pause services after N connects/min" \ "\n (default: 0 - disabled)" \ -#define init_trivial_usage \ - "" -#define init_full_usage "\n\n" \ - "Init is the parent of all processes" - -#define init_notes_usage \ -"This version of init is designed to be run only by the kernel.\n" \ -"\n" \ -"BusyBox init doesn't support multiple runlevels. The runlevels field of\n" \ -"the /etc/inittab file is completely ignored by BusyBox init. If you want\n" \ -"runlevels, use sysvinit.\n" \ -"\n" \ -"BusyBox init works just fine without an inittab. If no inittab is found,\n" \ -"it has the following default behavior:\n" \ -"\n" \ -" ::sysinit:/etc/init.d/rcS\n" \ -" ::askfirst:/bin/sh\n" \ -" ::ctrlaltdel:/sbin/reboot\n" \ -" ::shutdown:/sbin/swapoff -a\n" \ -" ::shutdown:/bin/umount -a -r\n" \ -" ::restart:/sbin/init\n" \ -"\n" \ -"if it detects that /dev/console is _not_ a serial console, it will also run:\n" \ -"\n" \ -" tty2::askfirst:/bin/sh\n" \ -" tty3::askfirst:/bin/sh\n" \ -" tty4::askfirst:/bin/sh\n" \ -"\n" \ -"If you choose to use an /etc/inittab file, the inittab entry format is as follows:\n" \ -"\n" \ -" <id>:<runlevels>:<action>:<process>\n" \ -"\n" \ -" <id>:\n" \ -"\n" \ -" WARNING: This field has a non-traditional meaning for BusyBox init!\n" \ -" The id field is used by BusyBox init to specify the controlling tty for\n" \ -" the specified process to run on. The contents of this field are\n" \ -" appended to \"/dev/\" and used as-is. There is no need for this field to\n" \ -" be unique, although if it isn't you may have strange results. If this\n" \ -" field is left blank, the controlling tty is set to the console. Also\n" \ -" note that if BusyBox detects that a serial console is in use, then only\n" \ -" entries whose controlling tty is either the serial console or /dev/null\n" \ -" will be run. BusyBox init does nothing with utmp. We don't need no\n" \ -" stinkin' utmp.\n" \ -"\n" \ -" <runlevels>:\n" \ -"\n" \ -" The runlevels field is completely ignored.\n" \ -"\n" \ -" <action>:\n" \ -"\n" \ -" Valid actions include: sysinit, respawn, askfirst, wait,\n" \ -" once, restart, ctrlaltdel, and shutdown.\n" \ -"\n" \ -" The available actions can be classified into two groups: actions\n" \ -" that are run only once, and actions that are re-run when the specified\n" \ -" process exits.\n" \ -"\n" \ -" Run only-once actions:\n" \ -"\n" \ -" 'sysinit' is the first item run on boot. init waits until all\n" \ -" sysinit actions are completed before continuing. Following the\n" \ -" completion of all sysinit actions, all 'wait' actions are run.\n" \ -" 'wait' actions, like 'sysinit' actions, cause init to wait until\n" \ -" the specified task completes. 'once' actions are asynchronous,\n" \ -" therefore, init does not wait for them to complete. 'restart' is\n" \ -" the action taken to restart the init process. By default this should\n" \ -" simply run /sbin/init, but can be a script which runs pivot_root or it\n" \ -" can do all sorts of other interesting things. The 'ctrlaltdel' init\n" \ -" actions are run when the system detects that someone on the system\n" \ -" console has pressed the CTRL-ALT-DEL key combination. Typically one\n" \ -" wants to run 'reboot' at this point to cause the system to reboot.\n" \ -" Finally the 'shutdown' action specifies the actions to taken when\n" \ -" init is told to reboot. Unmounting filesystems and disabling swap\n" \ -" is a very good here.\n" \ -"\n" \ -" Run repeatedly actions:\n" \ -"\n" \ -" 'respawn' actions are run after the 'once' actions. When a process\n" \ -" started with a 'respawn' action exits, init automatically restarts\n" \ -" it. Unlike sysvinit, BusyBox init does not stop processes from\n" \ -" respawning out of control. The 'askfirst' actions acts just like\n" \ -" respawn, except that before running the specified process it\n" \ -" displays the line \"Please press Enter to activate this console.\"\n" \ -" and then waits for the user to press enter before starting the\n" \ -" specified process.\n" \ -"\n" \ -" Unrecognized actions (like initdefault) will cause init to emit an\n" \ -" error message, and then go along with its business. All actions are\n" \ -" run in the order they appear in /etc/inittab.\n" \ -"\n" \ -" <process>:\n" \ -"\n" \ -" Specifies the process to be executed and its command line.\n" \ -"\n" \ -"Example /etc/inittab file:\n" \ -"\n" \ -" # This is run first except when booting in single-user mode\n" \ -" #\n" \ -" ::sysinit:/etc/init.d/rcS\n" \ -" \n" \ -" # /bin/sh invocations on selected ttys\n" \ -" #\n" \ -" # Start an \"askfirst\" shell on the console (whatever that may be)\n" \ -" ::askfirst:-/bin/sh\n" \ -" # Start an \"askfirst\" shell on /dev/tty2-4\n" \ -" tty2::askfirst:-/bin/sh\n" \ -" tty3::askfirst:-/bin/sh\n" \ -" tty4::askfirst:-/bin/sh\n" \ -" \n" \ -" # /sbin/getty invocations for selected ttys\n" \ -" #\n" \ -" tty4::respawn:/sbin/getty 38400 tty4\n" \ -" tty5::respawn:/sbin/getty 38400 tty5\n" \ -" \n" \ -" \n" \ -" # Example of how to put a getty on a serial line (for a terminal)\n" \ -" #\n" \ -" #::respawn:/sbin/getty -L ttyS0 9600 vt100\n" \ -" #::respawn:/sbin/getty -L ttyS1 9600 vt100\n" \ -" #\n" \ -" # Example how to put a getty on a modem line\n" \ -" #::respawn:/sbin/getty 57600 ttyS2\n" \ -" \n" \ -" # Stuff to do when restarting the init process\n" \ -" ::restart:/sbin/init\n" \ -" \n" \ -" # Stuff to do before rebooting\n" \ -" ::ctrlaltdel:/sbin/reboot\n" \ -" ::shutdown:/bin/umount -a -r\n" \ -" ::shutdown:/sbin/swapoff -a\n" - #define inotifyd_trivial_usage \ "PROG FILE1[:MASK]..." #define inotifyd_full_usage "\n\n" \ @@ -2651,13 +2489,6 @@ INSERT "the last line match .* to override this.)\n\n" \ ) -#define mesg_trivial_usage \ - "[y|n]" -#define mesg_full_usage "\n\n" \ - "Control write access to your terminal\n" \ - " y Allow write access to your terminal\n" \ - " n Disallow write access to your terminal" - #define microcom_trivial_usage \ "[-d DELAY] [-t TIMEOUT] [-s SPEED] [-X] TTY" #define microcom_full_usage "\n\n" \ diff --git a/init/Config.src b/init/Config.src index 2cac3573e..5767c93f0 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 32dd5a045..6b4fb7470 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 f14d5c0fd..5a1b3e8e8 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-$(CONFIG_BOOTCHARTD) += bootchartd.o + //config:config BOOTCHARTD //config: bool "bootchartd" //config: default y diff --git a/init/halt.c b/init/halt.c index 903953e80..47f1ef7b2 100644 --- a/init/halt.c +++ b/init/halt.c @@ -7,6 +7,68 @@ * Licensed under GPLv2, see file LICENSE in this source tree. */ +//applet:IF_HALT(APPLET(halt, _BB_DIR_SBIN, _BB_SUID_DROP)) +//applet:IF_HALT(APPLET_ODDNAME(poweroff, halt, _BB_DIR_SBIN, _BB_SUID_DROP, poweroff)) +//applet:IF_HALT(APPLET_ODDNAME(reboot, halt, _BB_DIR_SBIN, _BB_SUID_DROP, reboot)) + +//kbuild:lib-$(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 5c0d11402..340731b8b 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 ef5f0eb66..b560df205 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 |