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
   6  /*
   7   * Routines to report various classes of problems. Each report is decorated
   8   * with the current context (file name and line number), if available.
   9   *
  10   * tcpd_warn() reports a problem and proceeds.
  11   *
  12   * tcpd_jump() reports a problem and jumps.
  13   *
  14   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  15   */
  16
  17 #ifndef lint
  18 static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
  19 #endif
  20
  21 /* System libraries */
  22
  23 #include <syslog.h>
  24 #include <stdio.h>
  25 #include <setjmp.h>
  26
  27 /* Local stuff */
  28
  29 #include "tcpd.h"
  30 #include "mystdarg.h"
  31
  32 struct tcpd_context tcpd_context;
  33 jmp_buf tcpd_buf;
  34
  35 /* tcpd_diag - centralize error reporter */
  36
  37 static void tcpd_diag(severity, tag, format, ap)
  38 int     severity;
  39 char   *tag;
  40 char   *format;
  41 va_list ap;
  42 {
  43     char    fmt[BUFSIZ];
  44
  45     if (tcpd_context.file)
  46         sprintf(fmt, "%s: %s, line %d: %s",
  47                 tag, tcpd_context.file, tcpd_context.line, format);
  48     else
  49         sprintf(fmt, "%s: %s", tag, format);
  50     vsyslog(severity, fmt, ap);
  51 }
  52
  53 /* tcpd_warn - report problem of some sort and proceed */
  54
  55 void    VARARGS(tcpd_warn, char *, format)
  56 {
  57     va_list ap;
  58
  59     VASTART(ap, char *, format);
  60     tcpd_diag(LOG_ERR, "warning", format, ap);
  61     VAEND(ap);
  62 }
  63
  64 /* tcpd_jump - report serious problem and jump */
  65
  66 void    VARARGS(tcpd_jump, char *, format)
  67 {
  68     va_list ap;
  69
  70     VASTART(ap, char *, format);
  71     tcpd_diag(LOG_ERR, "error", format, ap);
  72     VAEND(ap);
  73     longjmp(tcpd_buf, AC_ERROR);
  74 }