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