lib/libpam/pam_debug_log.c

   1 /*-
   2  * Copyright 2001 Mark R V Murray
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libpam/libpam/pam_debug_log.c,v 1.8 2002/04/14 16:44:04 des Exp $
  27  * $DragonFly: src/lib/libpam/pam_debug_log.c,v 1.1 2005/07/13 14:34:21 joerg Exp $
  28  */
  29
  30 #include <libgen.h>
  31 #include <stdarg.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include <security/pam_appl.h>
  37 #include <security/openpam.h>
  38 #include <security/pam_mod_misc.h>
  39
  40 /* Print a verbose error, including the function name and a
  41  * cleaned up filename.
  42  */
  43 void
  44 _pam_verbose_error(pam_handle_t *pamh, int flags,
  45     const char *file, const char *function, const char *format, ...)
  46 {
  47         va_list ap;
  48         char *fmtbuf, *modname, *period;
  49
  50         if (!(flags & PAM_SILENT) && !openpam_get_option(pamh, "no_warn")) {
  51                 modname = basename(file);
  52                 period = strchr(modname, '.');
  53                 if (period == NULL)
  54                         period = strchr(modname, '\0');
  55                 va_start(ap, format);
  56                 asprintf(&fmtbuf, "%.*s: %s: %s\n", (int)(period - modname),
  57                     modname, function, format);
  58                 pam_verror(pamh, fmtbuf, ap);
  59                 free(fmtbuf);
  60                 va_end(ap);
  61         }
  62 }