manual/user guide/customization: add section on users tables

This patch adds basic documentation on users tables, a topic which was
currently not yet covered in the manual.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/docs/manual/customize-users-tables.txt b/docs/manual/customize-users-tables.txt
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index 0000000000..e2d32e23f2
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+// -*- mode:doc; -*-
+// vim: set syntax=asciidoc:
+
+[[customize-users]]
+=== Adding custom user accounts
+
+Sometimes it is needed to add specific users in the target system.
+To cover this requirement, Buildroot provides support for so-called
+_users tables_. To use this feature, set config option
++BR2_ROOTFS_USERS_TABLES+ to a space-separated list of users tables,
+regular text files following the xref:makeuser-syntax[makeusers syntax].
+
+As shown in xref:customize-dir-structure[], the recommended location for
+such files is +board/<company>/<boardname>/+.
+
+It should be noted that if the custom users are related to a specific
+application, you should set variable +FOO_USERS+ in the package's +.mk+
+file instead (see xref:generic-package-reference[]).