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 #ifndef lint
  19 static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
  20 #endif
  21
  22 /* System libraries */
  23
  24 #include <syslog.h>
  25 #include <stdio.h>
  26 #include <setjmp.h>
  27
  28 /* Local stuff */
  29
  30 #include "tcpd.h"
  31 #include "mystdarg.h"
  32
  33 struct tcpd_context tcpd_context;
  34 jmp_buf tcpd_buf;
  35
  36 /* tcpd_diag - centralize error reporter */
  37
  38 static void tcpd_diag(severity, tag, format, ap)
  39 int     severity;
  40 char   *tag;
  41 char   *format;
  42 va_list ap;
  43 {
  44     char    fmt[BUFSIZ];
  45
  46     if (tcpd_context.file)
  47         sprintf(fmt, "%s: %s, line %d: %s",
  48                 tag, tcpd_context.file, tcpd_context.line, format);
  49     else
  50         sprintf(fmt, "%s: %s", tag, format);
  51     vsyslog(severity, fmt, ap);
  52 }
  53
  54 /* tcpd_warn - report problem of some sort and proceed */
  55
  56 void    VARARGS(tcpd_warn, char *, format)
  57 {
  58     va_list ap;
  59
  60     VASTART(ap, char *, format);
  61     tcpd_diag(LOG_ERR, "warning", format, ap);
  62     VAEND(ap);
  63 }
  64
  65 /* tcpd_jump - report serious problem and jump */
  66
  67 void    VARARGS(tcpd_jump, char *, format)
  68 {
  69     va_list ap;
  70
  71     VASTART(ap, char *, format);
  72     tcpd_diag(LOG_ERR, "error", format, ap);
  73     VAEND(ap);
  74     longjmp(tcpd_buf, AC_ERROR);
  75 }