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      1 /*	$NetBSD: pam_debug_log.c,v 1.4 2011/12/28 14:52:56 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright 2001 Mark R V Murray
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #ifdef __FreeBSD__
     31 __FBSDID("$FreeBSD: src/lib/libpam/libpam/pam_debug_log.c,v 1.8 2002/04/14 16:44:04 des Exp $");
     32 #else
     33 __RCSID("$NetBSD: pam_debug_log.c,v 1.4 2011/12/28 14:52:56 christos Exp $");
     34 #endif
     35 
     36 #include <stdarg.h>
     37 #include <stdio.h>
     38 #include <stdlib.h>
     39 #include <string.h>
     40 
     41 #include <security/pam_appl.h>
     42 #include <security/openpam.h>
     43 #include <security/pam_mod_misc.h>
     44 
     45 /* Print a verbose error, including the function name and a
     46  * cleaned up filename.
     47  */
     48 void
     49 _pam_verbose_error(pam_handle_t *pamh, int flags,
     50     const char *file, const char *function, const char *format, ...)
     51 {
     52 	va_list ap;
     53 	char *msg;
     54 	int rv;
     55 	const char *modname, *period;
     56 
     57 	if ((flags & PAM_SILENT) || openpam_get_option(pamh, "no_warn"))
     58 		return;
     59 	modname = strrchr(file, '/');
     60 	if (modname == NULL)
     61 		modname = file;
     62 	period = strchr(modname, '.');
     63 	if (period == NULL)
     64 		period = strchr(modname, '\0');
     65 	va_start(ap, format);
     66 	rv = vasprintf(&msg, format, ap);
     67 	va_end(ap);
     68 	if (rv < 0)
     69 		return;
     70 	pam_error(pamh, "%.*s: %s: %s\n", (int)(ssize_t)(period - modname),
     71 	    modname, function, msg);
     72 	free(msg);
     73 }
     74