-diff -urpa shadow-4.8.orig/libmisc/chkname.c shadow-4.8/libmisc/chkname.c
---- shadow-4.8.orig/libmisc/chkname.c 2019-10-05 03:23:58.000000000 +0200
-+++ shadow-4.8/libmisc/chkname.c 2019-12-15 23:50:06.137000000 +0100
-@@ -55,21 +55,28 @@ static bool is_valid_name (const char *n
- }
-
- /*
-- * User/group names must match [a-z_][a-z0-9_-]*[$]
-+ * User/group names must match gnu e-regex:
-+ * [a-zA-Z0-9_.][a-zA-Z0-9_.-]{0,30}[a-zA-Z0-9_.$-]?
-+ *
-+ * as a non-POSIX, extension, allow "$" as the last char for
-+ * sake of Samba 3.x "add machine script"
- */
--
-- if (('\0' == *name) ||
-- !((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) {
-+ if ( ('\0' == *name) ||
-+ !((*name >= 'a' && *name <= 'z') ||
-+ (*name >= 'A' && *name <= 'Z') ||
-+ (*name >= '0' && *name <= '9') ||
-+ (*name == '_') || (*name == '.')
-+ )) {
- return false;
- }
-
- while ('\0' != *++name) {
-- if (!(( ('a' <= *name) && ('z' >= *name) ) ||
-- ( ('0' <= *name) && ('9' >= *name) ) ||
-- ('_' == *name) ||
-- ('-' == *name) ||
-- ( ('$' == *name) && ('\0' == *(name + 1)) )
-- )) {
-+ if (!( (*name >= 'a' && *name <= 'z') ||
-+ (*name >= 'A' && *name <= 'Z') ||
-+ (*name >= '0' && *name <= '9') ||
-+ (*name == '_') || (*name == '.') || (*name == '-') ||
-+ (*name == '$' && *(name + 1) == '\0')
-+ )) {
- return false;
- }
- }
-diff -urpa shadow-4.8.orig/man/groupadd.8.xml shadow-4.8/man/groupadd.8.xml
---- shadow-4.8.orig/man/groupadd.8.xml 2019-07-23 17:26:08.000000000 +0200
-+++ shadow-4.8/man/groupadd.8.xml 2019-12-15 23:41:44.562000000 +0100
-@@ -273,12 +273,6 @@
- <refsect1 id='caveats'>
- <title>CAVEATS</title>
- <para>
-- Groupnames must start with a lower case letter or an underscore,
-- followed by lower case letters, digits, underscores, or dashes.
-- They can end with a dollar sign.
-- In regular expression terms: [a-z_][a-z0-9_-]*[$]?
-- </para>
-- <para>
- Groupnames may only be up to &GROUP_NAME_MAX_LENGTH; characters long.
- </para>
- <para>
-diff -urpa shadow-4.8.orig/man/man8/groupadd.8 shadow-4.8/man/man8/groupadd.8
---- shadow-4.8.orig/man/man8/groupadd.8 2019-12-01 18:45:34.000000000 +0100
-+++ shadow-4.8/man/man8/groupadd.8 2019-12-15 23:41:44.563000000 +0100
-@@ -197,9 +197,7 @@ Shadow password suite configuration\&.
- .RE
- .SH "CAVEATS"
- .PP
--Groupnames must start with a lower case letter or an underscore, followed by lower case letters, digits, underscores, or dashes\&. They can end with a dollar sign\&. In regular expression terms: [a\-z_][a\-z0\-9_\-]*[$]?
--.PP
--Groupnames may only be up to 16 characters long\&.
-+Groupnames may only be up to 32 characters long\&.
- .PP
- You may not add a NIS or LDAP group\&. This must be performed on the corresponding server\&.
- .PP
-diff -urpa shadow-4.8.orig/man/man8/useradd.8 shadow-4.8/man/man8/useradd.8
---- shadow-4.8.orig/man/man8/useradd.8 2019-12-01 18:45:38.000000000 +0100
-+++ shadow-4.8/man/man8/useradd.8 2019-12-15 23:41:44.563000000 +0100
-@@ -226,7 +226,7 @@ is not enabled, no home directories are
- .PP
- \fB\-M\fR, \fB\-\-no\-create\-home\fR
- .RS 4
--Do no create the user\*(Aqs home directory, even if the system wide setting from
-+Do not create the user\*(Aqs home directory, even if the system wide setting from
- /etc/login\&.defs
- (\fBCREATE_HOME\fR) is set to
- \fIyes\fR\&.
-@@ -440,8 +440,6 @@ Similarly, if the username already exist
- \fBuseradd\fR
- will deny the user account creation request\&.
- .PP
--Usernames must start with a lower case letter or an underscore, followed by lower case letters, digits, underscores, or dashes\&. They can end with a dollar sign\&. In regular expression terms: [a\-z_][a\-z0\-9_\-]*[$]?
--.PP
- Usernames may only be up to 32 characters long\&.
- .SH "CONFIGURATION"
- .PP
-diff -urpa shadow-4.8.orig/man/useradd.8.xml shadow-4.8/man/useradd.8.xml
---- shadow-4.8.orig/man/useradd.8.xml 2019-10-05 03:23:58.000000000 +0200
-+++ shadow-4.8/man/useradd.8.xml 2019-12-15 23:41:44.563000000 +0100
-@@ -366,7 +366,7 @@
- </term>
- <listitem>
- <para>
-- Do no create the user's home directory, even if the system
-+ Do not create the user's home directory, even if the system
- wide setting from <filename>/etc/login.defs</filename>
- (<option>CREATE_HOME</option>) is set to
- <replaceable>yes</replaceable>.
-@@ -661,12 +661,6 @@
- </para>
-
- <para>
-- Usernames must start with a lower case letter or an underscore,
-- followed by lower case letters, digits, underscores, or dashes.
-- They can end with a dollar sign.
-- In regular expression terms: [a-z_][a-z0-9_-]*[$]?
-- </para>
-- <para>
- Usernames may only be up to 32 characters long.
- </para>
- </refsect1>