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diff -up shadow-4.6/man/newgidmap.1.xml.man_clarify_subid_delegation shadow-4.6/man/newgidmap.1.xml
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--- shadow-4.6/man/newgidmap.1.xml.man_clarify_subid_delegation 2021-11-03 09:58:34.176484342 +0100
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+++ shadow-4.6/man/newgidmap.1.xml 2021-11-03 09:58:34.191484452 +0100
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@@ -80,10 +80,15 @@
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para>
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- The <command>newgidmap</command> sets <filename>/proc/[pid]/gid_map</filename> based on its
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- command line arguments and the gids allowed (either in <filename>/etc/subgid</filename> or
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- through the configured NSS subid module).
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- Note that the root user is not exempted from the requirement for a valid
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+ The <command>newgidmap</command> sets <filename>/proc/[pid]/gid_map</filename>
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+ based on its command line arguments and the gids allowed. Subgid
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+ delegation can either be managed via <filename>/etc/subgid</filename>
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+ or through the configured NSS subid module. These options are mutually
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+ exclusive.
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+ </para>
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+
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+ <para>
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+ Note that the root group is not exempted from the requirement for a valid
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<filename>/etc/subgid</filename> entry.
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</para>
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diff -up shadow-4.6/man/newuidmap.1.xml.man_clarify_subid_delegation shadow-4.6/man/newuidmap.1.xml
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--- shadow-4.6/man/newuidmap.1.xml.man_clarify_subid_delegation 2021-11-03 09:58:34.176484342 +0100
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+++ shadow-4.6/man/newuidmap.1.xml 2021-11-03 09:58:34.191484452 +0100
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@@ -80,9 +80,14 @@
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para>
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- The <command>newuidmap</command> sets <filename>/proc/[pid]/uid_map</filename> based on its
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- command line arguments and the uids allowed (either in <filename>/etc/subuid</filename> or
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- through the configured NSS subid module).
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+ The <command>newuidmap</command> sets <filename>/proc/[pid]/uid_map</filename>
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+ based on its command line arguments and the uids allowed. Subuid
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+ delegation can either be managed via <filename>/etc/subuid</filename> or
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+ through the configured NSS subid module. These options are mutually
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+ exclusive.
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+ </para>
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+
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+ <para>
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Note that the root user is not exempted from the requirement for a valid
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<filename>/etc/subuid</filename> entry.
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</para>
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diff -up shadow-4.6/man/subgid.5.xml.man_clarify_subid_delegation shadow-4.6/man/subgid.5.xml
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--- shadow-4.6/man/subgid.5.xml.man_clarify_subid_delegation 2018-04-29 18:42:37.000000000 +0200
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+++ shadow-4.6/man/subgid.5.xml 2021-11-03 09:59:55.752084920 +0100
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@@ -32,6 +32,18 @@
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]>
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<refentry id='subgid.5'>
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+ <refentryinfo>
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+ <author>
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+ <firstname>Eric</firstname>
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+ <surname>Biederman</surname>
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+ <contrib>Creation, 2013</contrib>
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+ </author>
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+ <author>
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+ <firstname>Iker</firstname>
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+ <surname>Pedrosa</surname>
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+ <contrib>Developer, 2021</contrib>
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+ </author>
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+ </refentryinfo>
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<refmeta>
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<refentrytitle>subgid</refentrytitle>
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<manvolnum>5</manvolnum>
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@@ -41,12 +53,37 @@
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</refmeta>
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<refnamediv id='name'>
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<refname>subgid</refname>
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- <refpurpose>the subordinate gid file</refpurpose>
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+ <refpurpose>the configuration for subordinate group ids</refpurpose>
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</refnamediv>
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para>
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+ Subgid authorizes a group id to map ranges of group ids from its namespace
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+ into child namespaces.
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+ </para>
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+ <para>
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+ The delegation of the subordinate gids can be configured via the
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+ <replaceable>subid</replaceable> field in
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+ <filename>/etc/nsswitch.conf</filename> file. Only one value can be set
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+ as the delegation source. Setting this field to
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+ <replaceable>files</replaceable> configures the delegation of gids to
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+ <filename>/etc/subgid</filename>. Setting any other value treats
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+ the delegation as a plugin following with a name of the form
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+ <replaceable>libsubid_$value.so</replaceable>. If the value or plugin is
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+ missing, then the subordinate gid delegation falls back to
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+ <replaceable>files</replaceable>.
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+ </para>
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+ <para>
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+ Note, that <command>groupadd</command> will only create entries in
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+ <filename>/etc/subgid</filename> if subid delegation is managed via subid
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+ files.
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+ </para>
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+ </refsect1>
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+
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+ <refsect1 id='local-subordinate-delegation'>
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+ <title>LOCAL SUBORDINATE DELEGATION</title>
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+ <para>
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Each line in <filename>/etc/subgid</filename> contains
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9ed61c |
a user name and a range of subordinate group ids that user
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is allowed to use.
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9ed61c |
diff -up shadow-4.6/man/subuid.5.xml.man_clarify_subid_delegation shadow-4.6/man/subuid.5.xml
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9ed61c |
--- shadow-4.6/man/subuid.5.xml.man_clarify_subid_delegation 2018-04-29 18:42:37.000000000 +0200
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9ed61c |
+++ shadow-4.6/man/subuid.5.xml 2021-11-03 10:00:18.888255255 +0100
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9ed61c |
@@ -32,6 +32,18 @@
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9ed61c |
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9ed61c |
]>
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<refentry id='subuid.5'>
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9ed61c |
+ <refentryinfo>
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+ <author>
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9ed61c |
+ <firstname>Eric</firstname>
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+ <surname>Biederman</surname>
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+ <contrib>Creation, 2013</contrib>
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9ed61c |
+ </author>
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+ <author>
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+ <firstname>Iker</firstname>
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+ <surname>Pedrosa</surname>
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+ <contrib>Developer, 2021</contrib>
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9ed61c |
+ </author>
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9ed61c |
+ </refentryinfo>
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<refmeta>
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<refentrytitle>subuid</refentrytitle>
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<manvolnum>5</manvolnum>
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9ed61c |
@@ -41,12 +53,37 @@
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9ed61c |
</refmeta>
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<refnamediv id='name'>
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9ed61c |
<refname>subuid</refname>
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9ed61c |
- <refpurpose>the subordinate uid file</refpurpose>
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9ed61c |
+ <refpurpose>the configuration for subordinate user ids</refpurpose>
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9ed61c |
</refnamediv>
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9ed61c |
|
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9ed61c |
<refsect1 id='description'>
|
|
|
9ed61c |
<title>DESCRIPTION</title>
|
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|
9ed61c |
<para>
|
|
|
9ed61c |
+ Subuid authorizes a user id to map ranges of user ids from its namespace
|
|
|
9ed61c |
+ into child namespaces.
|
|
|
9ed61c |
+ </para>
|
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9ed61c |
+ <para>
|
|
|
9ed61c |
+ The delegation of the subordinate uids can be configured via the
|
|
|
9ed61c |
+ <replaceable>subid</replaceable> field in
|
|
|
9ed61c |
+ <filename>/etc/nsswitch.conf</filename> file. Only one value can be set
|
|
|
9ed61c |
+ as the delegation source. Setting this field to
|
|
|
9ed61c |
+ <replaceable>files</replaceable> configures the delegation of uids to
|
|
|
9ed61c |
+ <filename>/etc/subuid</filename>. Setting any other value treats
|
|
|
9ed61c |
+ the delegation as a plugin following with a name of the form
|
|
|
9ed61c |
+ <replaceable>libsubid_$value.so</replaceable>. If the value or plugin is
|
|
|
9ed61c |
+ missing, then the subordinate uid delegation falls back to
|
|
|
9ed61c |
+ <replaceable>files</replaceable>.
|
|
|
9ed61c |
+ </para>
|
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|
9ed61c |
+ <para>
|
|
|
9ed61c |
+ Note, that <command>useradd</command> will only create entries in
|
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|
9ed61c |
+ <filename>/etc/subuid</filename> if subid delegation is managed via subid
|
|
|
9ed61c |
+ files.
|
|
|
9ed61c |
+ </para>
|
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|
9ed61c |
+ </refsect1>
|
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9ed61c |
+
|
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9ed61c |
+ <refsect1 id='local-subordinate-delegation'>
|
|
|
9ed61c |
+ <title>LOCAL SUBORDINATE DELEGATION</title>
|
|
|
9ed61c |
+ <para>
|
|
|
9ed61c |
Each line in <filename>/etc/subuid</filename> contains
|
|
|
9ed61c |
a user name and a range of subordinate user ids that user
|
|
|
9ed61c |
is allowed to use.
|