get_ordered_context_list(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON

get_ordered_context_list(3)      SELinux     get_ordered_context_list(3)

NAME         top

       get_ordered_context_list, get_ordered_context_list_with_level,
       get_default_context, get_default_context_with_level,
       get_default_context_with_role,
       get_default_context_with_rolelevel, query_user_context,
       manual_user_enter_context, get_default_role - determine SELinux
       context(s) for user sessions

SYNOPSIS         top

       #include <selinux/selinux.h>
       #include <selinux/get_context_list.h>

       int get_ordered_context_list(const char *user, const char
       *fromcon, char ***list);

       int get_ordered_context_list_with_level(const char *user, const
       char *level, const char *fromcon, char ***list);

       int get_default_context(const char *user, const char *fromcon,
       char **newcon);

       int get_default_context_with_level(const char *user, const char
       *level, const char *fromcon, char **newcon);

       int get_default_context_with_role(const char *user, const char
       *role, const char *fromcon, char **newcon);

       int get_default_context_with_rolelevel(const char *user, const
       char *role, const char *level, const char *fromcon, char
       **newcon);

       int query_user_context(char **list, char **newcon);

       int manual_user_enter_context(const char *user, char **newcon);

       int get_default_type(const char *role, char **type);

DESCRIPTION         top

       This family of functions can be used to obtain either a
       prioritized list of all reachable security contexts for a given
       SELinux user or a single default (highest priority) context for a
       given SELinux user for use by login-like programs.  These
       functions takes a SELinux user identity that must be defined in
       the SELinux policy as their input, not a Linux username.  Most
       callers should typically first call getseuserbyname(3) to look up
       the SELinux user identity and level for a given Linux username
       and then invoke one of get_ordered_context_list_with_level() or
       get_default_context_with_level() with the returned SELinux user
       and level as inputs.

       get_ordered_context_list() obtains the list of contexts for the
       specified SELinux user identity that are reachable from the
       specified fromcon context based on the global
       /etc/selinux/{SELINUXTYPE}/contexts/default_contexts file and the
       per-user /etc/selinux/{SELINUXTYPE}/contexts/users/<username>
       file if it exists.  The fromcon parameter may be NULL to indicate
       that the current context should be used.  The function returns
       the number of contexts in the list, or -1 upon errors.  The list
       must be freed using the freeconary(3) function.

       get_ordered_context_list_with_level() invokes the
       get_ordered_context_list() function and applies the specified
       level.

       get_default_context() is the same as get_ordered_context_list()
       but only returns a single context which has to be freed with
       freecon(3).

       get_default_context_with_level() invokes the
       get_default_context() function and applies the specified level.

       get_default_context_with_role() is the same as
       get_default_context() but only returns a context with the
       specified role, returning -1 if no such context is reachable for
       the user.

       get_default_context_with_rolelevel() invokes the
       get_default_context_with_role() function and applies the
       specified level.

       query_user_context() takes a list of contexts, queries the user
       via stdin/stdout as to which context they want, and returns a new
       context as selected by the user (which has to be freed with
       freecon(3)).

       manual_user_enter_context() allows the user to manually enter a
       context as a fallback if a list of authorized contexts could not
       be obtained. Caller must free via freecon(3).

       get_default_type() Get the default type (domain) for role and set
       type to refer to it, which has to be freed with free.

RETURN VALUE         top

       get_ordered_context_list() and
       get_ordered_context_list_with_level() return the number of
       contexts in the list upon success or -1 upon errors.  The other
       functions return 0 for success or -1 for errors.

SEE ALSO         top

       selinux(8), freeconary(3), freecon(3), security_compute_av(3),
       getseuserbyname(3)

COLOPHON         top

       This page is part of the selinux (Security-Enhanced Linux user-
       space libraries and tools) project.  Information about the
       project can be found at 
       ⟨https://github.com/SELinuxProject/selinux/wiki⟩.  If you have a
       bug report for this manual page, see
       ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/SELinuxProject/selinux⟩ on 2021-04-01.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-03-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

russell@coker.com.au         1 January 2004  get_ordered_context_list(3)

Pages that refer to this page: getseuserbyname(3)security_compute_av(3)default_contexts(5)default_type(5)failsafe_context(5)user_contexts(5)