usr/src/lib/libwrap/diag.c

   1 /*
   2  * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5 #pragma ident   "%Z%%M% %I%     %E% SMI"
   6
   7  /*
   8   * Routines to report various classes of problems. Each report is decorated
   9   * with the current context (file name and line number), if available.
  10   *
  11   * tcpd_warn() reports a problem and proceeds.
  12   *
  13   * tcpd_jump() reports a problem and jumps.
  14   *
  15   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  16   */
  17
  18 static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
  19
  20 /* System libraries */
  21
  22 #include <syslog.h>
  23 #include <stdio.h>
  24 #include <setjmp.h>
  25
  26 /* Local stuff */
  27
  28 #include "tcpd.h"
  29 #include "mystdarg.h"
  30
  31 struct tcpd_context tcpd_context;
  32 jmp_buf tcpd_buf;
  33
  34 /* tcpd_diag - centralize error reporter */
  35
  36 static void tcpd_diag(severity, tag, format, ap)
  37 int     severity;
  38 char   *tag;
  39 char   *format;
  40 va_list ap;
  41 {
  42     char    fmt[BUFSIZ];
  43
  44     if (tcpd_context.file)
  45         sprintf(fmt, "%s: %s, line %d: %s",
  46                 tag, tcpd_context.file, tcpd_context.line, format);
  47     else
  48         sprintf(fmt, "%s: %s", tag, format);
  49     vsyslog(severity, fmt, ap);
  50 }
  51
  52 /* tcpd_warn - report problem of some sort and proceed */
  53
  54 void    VARARGS(tcpd_warn, char *, format)
  55 {
  56     va_list ap;
  57
  58     VASTART(ap, char *, format);
  59     tcpd_diag(LOG_ERR, "warning", format, ap);
  60     VAEND(ap);
  61 }
  62
  63 /* tcpd_jump - report serious problem and jump */
  64
  65 void    VARARGS(tcpd_jump, char *, format)
  66 {
  67     va_list ap;
  68
  69     VASTART(ap, char *, format);
  70     tcpd_diag(LOG_ERR, "error", format, ap);
  71     VAEND(ap);
  72     longjmp(tcpd_buf, AC_ERROR);
  73 }