Rename FEATURE_INITRD to LINUXRC and make it separate, not an alias to init

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

configs/TEST_nommu_defconfig

@@ -390,7 +390,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_HALT=y
 # CONFIG_FEATURE_CALL_TELINIT is not set
 CONFIG_TELINIT_PATH=""

configs/TEST_noprintf_defconfig

@@ -395,7 +395,7 @@ CONFIG_FEATURE_KILL_DELAY=0
 # CONFIG_FEATURE_INIT_SYSLOG is not set
 # CONFIG_FEATURE_EXTRA_QUIET is not set
 # CONFIG_FEATURE_INIT_COREDUMPS is not set
-# CONFIG_FEATURE_INITRD is not set
+# CONFIG_LINUXRC is not set
 # CONFIG_HALT is not set
 # CONFIG_FEATURE_CALL_TELINIT is not set
 CONFIG_TELINIT_PATH=""

configs/TEST_rh9_defconfig

@@ -407,7 +407,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_HALT=y
 # CONFIG_FEATURE_CALL_TELINIT is not set
 CONFIG_TELINIT_PATH=""

configs/android2_defconfig

@@ -425,7 +425,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_INIT_TERMINAL_TYPE="linux"
 CONFIG_MESG=y
 CONFIG_FEATURE_MESG_ENABLE_ONLY_GROUP=y

configs/android_502_defconfig

@@ -532,7 +532,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_INIT_TERMINAL_TYPE="linux"
 CONFIG_FEATURE_INIT_MODIFY_CMDLINE=y
 CONFIG_MESG=y

configs/android_defconfig

@@ -448,7 +448,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_INIT_TERMINAL_TYPE="linux"
 CONFIG_MESG=y
 CONFIG_FEATURE_MESG_ENABLE_ONLY_GROUP=y

configs/android_ndk_defconfig

@@ -458,7 +458,7 @@ CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
 CONFIG_FEATURE_EXTRA_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
-CONFIG_FEATURE_INITRD=y
+CONFIG_LINUXRC=y
 CONFIG_INIT_TERMINAL_TYPE="linux"
 CONFIG_MESG=y
 CONFIG_FEATURE_MESG_ENABLE_ONLY_GROUP=y

configs/cygwin_defconfig

@@ -425,7 +425,7 @@ CONFIG_FEATURE_KILL_DELAY=0
 # CONFIG_FEATURE_INIT_SYSLOG is not set
 # CONFIG_FEATURE_EXTRA_QUIET is not set
 # CONFIG_FEATURE_INIT_COREDUMPS is not set
-# CONFIG_FEATURE_INITRD is not set
+# CONFIG_LINUXRC is not set
 CONFIG_INIT_TERMINAL_TYPE=""
 CONFIG_MESG=y
 CONFIG_FEATURE_MESG_ENABLE_ONLY_GROUP=y

configs/freebsd_defconfig

@@ -422,7 +422,7 @@ CONFIG_FEATURE_KILL_DELAY=0
 # CONFIG_FEATURE_INIT_SYSLOG is not set
 # CONFIG_FEATURE_EXTRA_QUIET is not set
 # CONFIG_FEATURE_INIT_COREDUMPS is not set
-# CONFIG_FEATURE_INITRD is not set
+# CONFIG_LINUXRC is not set
 CONFIG_INIT_TERMINAL_TYPE=""
 # CONFIG_MESG is not set
 

init/halt.c

@@ -135,7 +135,7 @@ int halt_main(int argc UNUSED_PARAM, char **argv)
 	if (!(flags & 4)) { /* no -f */
 //TODO: I tend to think that signalling linuxrc is wrong
 // pity original author didn't comment on it...
-		if (ENABLE_FEATURE_INITRD) {
+		if (ENABLE_LINUXRC) {
 			/* talk to linuxrc */
 			/* bbox init/linuxrc assumed */
 			pid_t *pidlist = find_pid_by_name("linuxrc");

init/init.c

@@ -16,10 +16,21 @@
 //config:	help
 //config:	  init is the first program run when the system boots.
 //config:
+//config:config LINUXRC
+//config:	bool "Support running init from within an initrd (not initramfs)"
+//config:	default y
+//config:	select FEATURE_SYSLOG
+//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 FEATURE_USE_INITTAB
 //config:	bool "Support reading an inittab file"
 //config:	default y
-//config:	depends on INIT
+//config:	depends on INIT || LINUXRC
 //config:	help
 //config:	  Allow init to read an inittab file when the system boot.
 //config:
@@ -46,7 +57,7 @@
 //config:config FEATURE_INIT_SCTTY
 //config:	bool "Run commands with leading dash with controlling tty"
 //config:	default y
-//config:	depends on INIT
+//config:	depends on INIT || LINUXRC
 //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").
@@ -61,40 +72,29 @@
 //config:config FEATURE_INIT_SYSLOG
 //config:	bool "Enable init to write to syslog"
 //config:	default y
-//config:	depends on INIT
+//config:	depends on INIT || LINUXRC
 //config:
 //config:config FEATURE_EXTRA_QUIET
 //config:	bool "Be _extra_ quiet on boot"
 //config:	default y
-//config:	depends on INIT
+//config:	depends on INIT || LINUXRC
 //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:	depends on INIT || LINUXRC
 //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:	depends on INIT || LINUXRC
 //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
@@ -106,7 +106,7 @@
 //config:config FEATURE_INIT_MODIFY_CMDLINE
 //config:	bool "Modify the command-line to \"init\""
 //config:	default y
-//config:	depends on INIT
+//config:	depends on INIT || LINUXRC
 //config:	help
 //config:	  When launched as PID 1 and after parsing its arguments, init
 //config:	  wipes all the arguments but argv[0] and rewrites argv[0] to
@@ -119,9 +119,10 @@
 //config:	  retrieved in /proc/1/cmdline on Linux, for example.
 
 //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))
+//applet:IF_LINUXRC(APPLET_ODDNAME(linuxrc, init, BB_DIR_ROOT, BB_SUID_DROP, linuxrc))
 
 //kbuild:lib-$(CONFIG_INIT) += init.o
+//kbuild:lib-$(CONFIG_LINUXRC) += init.o
 
 #define DEBUG_SEGV_HANDLER 0
 
@@ -1057,7 +1058,7 @@ int init_main(int argc UNUSED_PARAM, char **argv)
 	if (!DEBUG_INIT) {
 		/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
 		if (getpid() != 1
-		 && (!ENABLE_FEATURE_INITRD || applet_name[0] != 'l') /* not linuxrc? */
+		 && (!ENABLE_LINUXRC || applet_name[0] != 'l') /* not linuxrc? */
 		) {
 			bb_error_msg_and_die("must be run as PID 1");
 		}