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path: root/lib/libpam/libpam/pam_debug_log.c
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/*-
 * Copyright 2001 Mark R V Murray
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <libgen.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <security/pam_appl.h>
#include <security/openpam.h>
#include <security/pam_mod_misc.h>

/* Print a verbose error, including the function name and a
 * cleaned up filename.
 */
void
_pam_verbose_error(pam_handle_t *pamh, int flags,
    const char *file, const char *function, const char *format, ...)
{
	va_list ap;
	char *fmtbuf, *modname, *period;

	if (!(flags & PAM_SILENT) && !openpam_get_option(pamh, "no_warn")) {
		modname = basename(file);
		period = strchr(modname, '.');
		if (period == NULL)
			period = strchr(modname, '\0');
		va_start(ap, format);
		asprintf(&fmtbuf, "%.*s: %s: %s\n", (int)(period - modname),
		    modname, function, format);
		pam_verror(pamh, fmtbuf, ap);
		free(fmtbuf);
		va_end(ap);
	}
}