Manual Reference Pages  - selinux_set_callback (3)

NAME

selinux_set_callback - userspace SELinux callback facilities.

CONTENTS

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_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) (security_context_t *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.

RETURN VALUE

None.

ERRORS

None.

AUTHOR

Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO

selabel_open(3), avc_init(3), selinux(8)


selinux_set_callback (3) 20 Jun 2007
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