selinux_set_callback(3) SELinux API documentation selinux_set_callback(3)
NAME
selinux_set_callback - userspace SELinux callback facilities
SYNOPSIS
#include <selinux/selinux.h>
void selinux_set_callback(int type, union selinux_callback callback);
DESCRIPTION
selinux_set_callback() sets the callback indicated by type to the value
of callback, which should be passed as a function pointer cast to type
union selinux_callback.
All callback functions should return a negative value with errno set
appropriately on error.
The available values for type are:
SELINUX_CB_LOG
int (*func_log) (int type, const char *fmt, ...);
This callback is used for logging and should process the
printf(3) style fmt string and arguments as appropriate. The
type argument indicates the type of message and will be set to
one of the following:
SELINUX_ERROR
SELINUX_WARNING
SELINUX_INFO
SELINUX_AVC
SELINUX_POLICYLOAD
SELINUX_SETENFORCE
SELINUX_ERROR, SELINUX_WARNING, and SELINUX_INFO indicate stan-
dard log severity levels and are not auditable messages.
The SELINUX_AVC, SELINUX_POLICYLOAD, and SELINUX_SETENFORCE mes-
sage types can be audited with AUDIT_USER_AVC, AU-
DIT_USER_MAC_POLICY_LOAD, and AUDIT_USER_MAC_STATUS values from
libaudit, respectively. If they are not audited, SELINUX_AVC
should be considered equivalent to SELINUX_ERROR; similarly,
SELINUX_POLICYLOAD and SELINUX_SETENFORCE should be considered
equivalent to SELINUX_INFO.
SELINUX_CB_AUDIT
int (*func_audit) (void *auditdata, security_class_t cls,
char *msgbuf, size_t msgbufsize);
This callback is used for supplemental auditing in AVC messages.
The auditdata and cls arguments are the values passed to
avc_has_perm(3). A human-readable interpretation should be
printed to msgbuf using no more than msgbufsize characters.
SELINUX_CB_VALIDATE
int (*func_validate) (char **ctx);
This callback is used for context validation. The callback may
optionally modify the input context by setting the target of the
ctx pointer to a new context. In this case, the old value
should be freed with freecon(3). The value of errno should be
set to EINVAL to indicate an invalid context.
SELINUX_CB_SETENFORCE
int (*func_setenforce) (int enforcing);
This callback is invoked when the system enforcing state
changes. The enforcing argument indicates the new value and is
set to 1 for enforcing mode, and 0 for permissive mode.
SELINUX_CB_POLICYLOAD
int (*func_policyload) (int seqno);
This callback is invoked when the system security policy is
reloaded. The seqno argument is the current sequential number
of the policy generation in the system.
RETURN VALUE
None.
ERRORS
None.
AUTHOR
Eamon Walsh <ewalsh@tycho.nsa.gov>
SEE ALSO
selabel_open(3), avc_init(3), avc_netlink_open(3), selinux(8)
20 Jun 2007 selinux_set_callback(3)
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