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Add new GUC createrole_self_grant.

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Can be set to the empty string, or to either or both of "set" or
"inherit". If set to a non-empty value, a non-superuser who creates
a role (necessarily by relying up the CREATEROLE privilege) will
grant that role back to themselves with the specified options.

This isn't a security feature, because the grant that this feature
triggers can also be performed explicitly. Instead, it's a user experience
feature. A superuser would necessarily inherit the privileges of any
created role and be able to access all such roles via SET ROLE;
with this patch, you can configure createrole_self_grant = 'set, inherit'
to provide a similar experience for a user who has CREATEROLE but not
SUPERUSER.

Discussion: https://postgr.es/m/CA+TgmobN59ct+Emmz6ig1Nua2Q-_o=r6DSD98KfU53kctq_kQw@mail.gmail.com
This commit is contained in:
Robert Haas
2023-01-10 12:44:49 -05:00
parent cf5eb37c5e
commit e5b8a4c098
9 changed files with 220 additions and 5 deletions
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12
src/backend/utils/misc/guc_tables.c
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@ -3949,6 +3949,18 @@ struct config_string ConfigureNamesString[] =
check_temp_tablespaces, assign_temp_tablespaces, NULL
},
{
{"createrole_self_grant", PGC_USERSET, CLIENT_CONN_STATEMENT,
gettext_noop("Sets whether a CREATEROLE user automatically grants "
"the role to themselves, and with which options."),
NULL,
GUC_LIST_INPUT
},
&createrole_self_grant,
"",
check_createrole_self_grant, assign_createrole_self_grant, NULL
},
{
{"dynamic_library_path", PGC_SUSET, CLIENT_CONN_OTHER,
gettext_noop("Sets the path for dynamically loadable modules."),