/*
* Copyright (c) 2010-2013 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <config.h>
#include <sys/types.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <libaudit.h>
#include "missing.h"
#include "error.h"
#include "alloc.h"
#include "gettext.h"
#include "sudo_debug.h"
#include "linux_audit.h"
/*
* Open audit connection if possible.
* Returns audit fd on success and -1 on failure.
*/
int
static linux_audit_open(void)
{
static int au_fd = -1;
debug_decl(linux_audit_open, SUDO_DEBUG_AUDIT)
if (au_fd != -1)
debug_return_int(au_fd);
au_fd = audit_open();
if (au_fd == -1) {
/* Kernel may not have audit support. */
if (errno != EINVAL && errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT)
fatal(_("unable to open audit system"));
} else {
(void)fcntl(au_fd, F_SETFD, FD_CLOEXEC);
}
debug_return_int(au_fd);
}
int
linux_audit_command(char *argv[], int result)
{
int au_fd, rc;
char *command, *cp, **av;
size_t size, n;
debug_decl(linux_audit_command, SUDO_DEBUG_AUDIT)
if ((au_fd = linux_audit_open()) == -1)
debug_return_int(-1);
/* Convert argv to a flat string. */
for (size = 0, av = argv; *av != NULL; av++)
size += strlen(*av) + 1;
command = cp = emalloc(size);
for (av = argv; *av != NULL; av++) {
n = strlcpy(cp, *av, size - (cp - command));
if (n >= size - (cp - command)) {
fatalx(_("internal error, %s overflow"),
"linux_audit_command()");
}
cp += n;
*cp++ = ' ';
}
*--cp = '\0';
/* Log command, ignoring ECONNREFUSED on error. */
rc = audit_log_user_command(au_fd, AUDIT_USER_CMD, command, NULL, result);
if (rc <= 0 && errno != ECONNREFUSED)
warning(_("unable to send audit message"));
efree(command);
debug_return_int(rc);
}
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