man: document changed EnvironmentFile= behaviour

[elogind.git] / README

diff --git a/README b/README
index 0e5532aed7fbddff54e601c1cdbd92f792c4d78d..96fdc5f3152462649190cff3d1038ac6fd4c0f50 100644 (file)
--- a/README
+++ b/README
@@ -27,7 +27,7 @@ AUTHOR:
         Lennart Poettering with major support from Kay Sievers
 
 REQUIREMENTS:
         Lennart Poettering with major support from Kay Sievers
 
 REQUIREMENTS:

-        Linux kernel >= 2.6.30 (with autofs4, devtmpfs, cgroups)
+        Linux kernel >= 2.6.30 (with devtmpfs, cgroups; optional but strongly recommended: autofs4, ipv6)

         libudev >= 163
         dbus >= 1.4.0
         libcap
         libudev >= 163
         dbus >= 1.4.0
         libcap


@@ -47,10 +47,40 @@ REQUIREMENTS:
         automake
         autoconf
         libtool
         automake
         autoconf
         libtool

+        make, gcc, and similar tools

 
         During runtime you need the following dependencies:
 
         util-linux > v2.18 (requires fsck -l, agetty -s)
 
         During runtime you need the following dependencies:
 
         util-linux > v2.18 (requires fsck -l, agetty -s)

-        sulogin (from sysvinit-tools)
+        sulogin (from sysvinit-tools, optional but recommended)

         plymouth (optional)
         dracut (optional)
         plymouth (optional)
         dracut (optional)

+
+WARNINGS:
+        systemd will warn you during boot if /etc/mtab is not a
+        symlink to /proc/mounts. Please ensure that /etc/mtab is a
+        proper symlink.
+
+        systemd will warn you during boot if /usr is on a different
+        file system than /. While in systemd itself very little will
+        break if /usr is on a separate partition many of its
+        dependencies very likely will break sooner or later in one
+        form or another. For example udev rules tend to refer to
+        binaries in /usr, binaries that link to libraries in /usr or
+        binaries that refer to data files in /usr. Since these
+        breakages are not always directly visible systemd will warn
+        about this, since this kind of file system setup is not really
+        supported anymore by the basic set of Linux OS components.
+
+        For more information on this issue consult
+        http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
+
+ENGINEERING AND CONSULTING SERVICES:
+        ProFUSION <http://profusion.mobi> offers professional
+        engineering and consulting services for systemd for embedded
+        and other use. Please contact Gustavo Barbieri
+        <barbieri@profusion.mobi> for more information.
+
+        Disclaimer: This notice is not a recommendation or official
+        endorsement. However, ProFUSION's upstream work has been very
+        beneficial for the systemd project.