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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
***/
#include <errno.h>
#include "audit-fd.h"
#if HAVE_AUDIT
#include <libaudit.h>
#include <stdbool.h>
#include "capability-util.h"
#include "fd-util.h"
#include "log.h"
#include "util.h"
static bool initialized = false;
static int audit_fd;
int get_audit_fd(void) {
if (!initialized) {
if (have_effective_cap(CAP_AUDIT_WRITE) == 0) {
audit_fd = -EPERM;
initialized = true;
return audit_fd;
}
audit_fd = audit_open();
if (audit_fd < 0) {
if (!IN_SET(errno, EAFNOSUPPORT, EPROTONOSUPPORT))
log_error_errno(errno, "Failed to connect to audit log: %m");
audit_fd = errno ? -errno : -EINVAL;
}
initialized = true;
}
return audit_fd;
}
void close_audit_fd(void) {
if (initialized && audit_fd >= 0)
safe_close(audit_fd);
initialized = true;
audit_fd = -ECONNRESET;
}
#else
int get_audit_fd(void) {
return -EAFNOSUPPORT;
}
void close_audit_fd(void) {
}
#endif
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