build: drop ROOTPREFIX setting

This change removes the ROOTPREFIX build setting.

If your OS expects to have / mounted earlier in the boot process than
/usr, you will need to pass the appropriate directory settings to "meson
setup" as part of the build process, for example:

$ meson setup \
    --bindir /bin --libdir /lib64 --libexecdir /lib --sbindir /sbin \
    build

also, move plugins  to ```libdir/rc/plugins``` which is the standard
location for plugins accessed via dlopen.

README.md

@@ -18,8 +18,6 @@ We don't support building a static OpenRC with PAM.
 `LOCAL_PREFIX` should be set to where user maintained packages are.
 Only set `LOCAL_PREFIX` if different from `PKG_PREFIX`.
 
-`ROOTPREFIX` should be set when the root path is different from '/'.
-
 `rc` and `rc.shutdown` are the hooks from the BSD init into OpenRC.
 
 `devd.conf` is modified from FreeBSD to call `/etc/rc.devd` which is a
@@ -32,6 +30,17 @@ Obviously, if you're installing this onto a system that does not use
 OpenRC by default then you may wish to backup the above listed files,
 remove them and then install so that the OS hooks into OpenRC.
 
+If you are installing this onto a system which has separate / and /usr
+file systems and expects / to be mounted before /usr, you will need to
+make sure the appropriate pieces are installed on / by passing the
+appropriate options to "meson setup" as follows:
+
+```
+$ meson setup \
+        --bindir /bin --libdir /lib64 --libexecdir /lib --sbindir /sbin \
+        build_path
+```
+
 ## Discussions
 
 We are testing [discussions](https://github.com/OpenRC/openrc/discussions), so

meson.build

@@ -79,23 +79,15 @@ else
   pkg_prefix = option_pkg_prefix
 endif
 
-rootprefix = get_option('rootprefix')
-if rootprefix == ''
-rootprefix = '/'
-endif
-
-bindir = rootprefix / get_option('bindir')
-libdir = rootprefix / get_option('libdir')
-libexecdir = get_option('libexecdir')
-if os == 'Linux' and libexecdir == 'libexec'
-  libexecdir = 'lib'
-endif
-libexecdir = rootprefix / libexecdir
+bindir = get_option('prefix') / get_option('bindir')
+libdir = get_option('prefix') / get_option('libdir')
+pluginsdir = libdir / 'rc/plugins'
+libexecdir = get_option('prefix') / get_option('libexecdir')
 rc_libexecdir = libexecdir / 'rc'
 rc_bindir = rc_libexecdir / 'bin'
 rc_sbindir = rc_libexecdir / 'sbin'
 rc_shdir = rc_libexecdir / 'sh'
-sbindir = rootprefix / get_option('sbindir')
+sbindir = get_option('prefix') / get_option('sbindir')
 pamdir = get_option('sysconfdir') / 'pam.d'
 
 crypt_dep = []
@@ -230,7 +222,7 @@ if get_option('pkgconfig')
     libraries : librc,
     subdirs : ['openrc'],
     variables: {
-      'rc_path': rc_libexecdir,
+      'pluginsdir': pluginsdir,
     }
   )
 endif

meson_options.txt

@@ -18,8 +18,6 @@ option('pkg_prefix', type : 'string',
   description : 'default location where packages are installed')
 option('pkgconfig', type : 'boolean',
   description : 'build PKGConfig files')
-option('rootprefix', type : 'string',
-  description : 'override the root prefix')
 option('selinux', type : 'feature', value : 'auto',
   description : 'enable SELinux support')
 option('shell', type : 'string', value : '/bin/sh',

sh/functions.sh.in

@@ -79,16 +79,10 @@ if [ -n "$ZSH_VERSION" ]; then
 fi
 
 # Make a sane PATH
-_PREFIX=@PREFIX@
 _PKG_PREFIX=@PKG_PREFIX@
 _LOCAL_PREFIX=@LOCAL_PREFIX@
 _LOCAL_PREFIX=${_LOCAL_PREFIX:-/usr/local}
-_PATH=@LIBEXECDIR@/bin
-case "$_PREFIX" in
-	"$_PKG_PREFIX"|"$_LOCAL_PREFIX") ;;
-	*) _PATH="$_PATH:$_PREFIX/bin:$_PREFIX/sbin";;
-esac
-_PATH="$_PATH":/bin:/sbin:/usr/bin:/usr/sbin
+_PATH="@LIBEXECDIR@/bin:/bin:/sbin:/usr/bin:/usr/sbin"
 
 if [ -n "$_PKG_PREFIX" ]; then
 	_PATH="$_PATH:$_PKG_PREFIX/bin:$_PKG_PREFIX/sbin"

sh/meson.build

@@ -1,9 +1,4 @@
 sh_conf_data = configuration_data()
-if rootprefix == '/'
-  sh_conf_data.set('PREFIX', '')
-  else
-  sh_conf_data.set('PREFIX', rootprefix)
-endif
 sh_conf_data.set('BINDIR', bindir)
 sh_conf_data.set('LIBEXECDIR', rc_libexecdir)
 sh_conf_data.set('LOCAL_PREFIX', local_prefix)

src/librc/meson.build

@@ -1,11 +1,6 @@
 rc_h_conf_data = configuration_data()
-if rootprefix == '/'
-  rc_h_conf_data.set('PREFIX', '')
-  else
-  rc_h_conf_data.set('PREFIX', rootprefix)
-	endif
-rc_h_conf_data.set('LIB', libname)
-rc_h_conf_data.set('LIBEXECDIR', rc_libexecdir)
+rc_h_conf_data.set('RC_LIBEXECDIR', rc_libexecdir)
+rc_h_conf_data.set('RC_PLUGINDIR', pluginsdir)
 rc_h_conf_data.set('LOCAL_PREFIX', local_prefix)
 rc_h_conf_data.set('PKG_PREFIX', pkg_prefix)
 rc_h_conf_data.set('SYSCONFDIR', get_option('sysconfdir'))

src/librc/rc.h.in

@@ -23,8 +23,7 @@ extern "C" {
 #endif
 
 #define RC_SYSCONFDIR		"@SYSCONFDIR@"
-#define RC_LIBDIR               "/@LIB@/rc"
-#define RC_LIBEXECDIR           "@LIBEXECDIR@"
+#define RC_LIBEXECDIR           "@RC_LIBEXECDIR@"
 #if defined(__linux__) || (defined(__FreeBSD_kernel__) && \
 		defined(__GLIBC__)) || defined(__GNU__)
 #define RC_SVCDIR               "/run/openrc"
@@ -34,7 +33,7 @@ extern "C" {
 #define RC_RUNLEVELDIR          RC_SYSCONFDIR "/runlevels"
 #define RC_INITDIR              RC_SYSCONFDIR "/init.d"
 #define RC_CONFDIR              RC_SYSCONFDIR "/conf.d"
-#define RC_PLUGINDIR            RC_LIBDIR "/plugins"
+#define RC_PLUGINDIR            "@RC_PLUGINDIR@"
 
 #define RC_INIT_FIFO RC_SVCDIR"/init.ctl"
 #define RC_PROFILE_ENV     RC_SYSCONFDIR "/profile.env"