AUDIT_ENCODE_NV_STRING(3) Linux Audit API AUDIT_ENCODE_NV_STRING(3)NAME
audit_encode_nv_string - encode a name/value pair in a string
SYNOPSIS
#include <libaudit.h>
int audit_encode_nv_string(const char *name, const char *value, unsigned int vlen)
DESCRIPTION
This function is used to encode a name/value pair. This should be used on any field being logged that potentially contains a space, a dou-
ble-quote, or a control character. Any value containing those have to be specially encoded for the auparse library to correctly handle the
value. The encoding method is designed to prevent log injection attacks where malicious values could cause parsing errors.
To use this function, pass the name string and value strings on their respective arguments. If the value is likely to have a NUL value
embedded within it, you will need to pass a value length that tells in bytes how big the value is. Otherwise, you can pass a 0 for vlen and
the function will simply use strlen against the value pointer. Also be aware that the name of the field will cause auparse to do certain
things when interpretting the value. If the name is uid, a user id value in decimal is expected. Make sure that well known names are used
for their intended purpose or that there is no chance of name collision with something new.
RETURN VALUE
Returns a freshly malloc'ed string that the caller must free or NULL on error.
SEE ALSO audit_log_user_message(3), audit_log_user_comm_message(3), audit_log_user_avc_message(3), audit_log_semanage_message(3).
AUTHOR
Steve Grubb
Red Hat Sept 2008 AUDIT_ENCODE_NV_STRING(3)
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AUDIT_LOG_USER_AVC_MESSAGE(3) Linux Audit API AUDIT_LOG_USER_AVC_MESSAGE(3)NAME
audit_log_user_avc_message - log a user avc message
SYNOPSIS
#include <libaudit.h>
int audit_log_user_avc_message(int audit_fd, int type, const char *message, const char *hostname, const char *addr, const char *tty, uid_t
uid)
DESCRIPTION
This function will log a message to the audit system using a predefined message format. This function should be used by all apps that are
SE Linux object managers. The function parameters are as follows:
audit_fd - The fd returned by audit_open
type - type of message, ex: AUDIT_USER_AVC
message - the message being sent
hostname - the hostname if known
addr - The network address of the user
tty - The tty of the user, if NULL will attempt to figure out
uid - The auid of the person related to the avc message
RETURN VALUE
It returns the sequence number which is > 0 on success or <= 0 on error.
ERRORS
This function returns -1 on failure. Examine errno for more info.
SEE ALSO audit_log_user_message(3), audit_log_acct_message(3), audit_log_user_avc_message(3), audit_log_semanage_message(3).
AUTHOR
Steve Grubb
Red Hat Oct 2006 AUDIT_LOG_USER_AVC_MESSAGE(3)
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