contrib/tcp_wrappers/diag.c

   1  /*
   2   * Routines to report various classes of problems. Each report is decorated
   3   * with the current context (file name and line number), if available.
   4   *
   5   * tcpd_warn() reports a problem and proceeds.
   6   *
   7   * tcpd_jump() reports a problem and jumps.
   8   *
   9   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  10   *
  11   * @(#) diag.c 1.1 94/12/28 17:42:20
  12   * $DragonFly: src/contrib/tcp_wrappers/diag.c,v 1.2 2005/09/15 04:33:04 sephe Exp $
  13   */
  14
  15 /* System libraries */
  16
  17 #include <syslog.h>
  18 #include <setjmp.h>
  19 #include <stdarg.h>
  20
  21 /* Local stuff */
  22
  23 #include "tcpd.h"
  24
  25 struct tcpd_context tcpd_context;
  26 jmp_buf tcpd_buf;
  27
  28 /* tcpd_diag - centralize error reporter */
  29
  30 static void
  31 tcpd_diag(int severity, const char *tag, const char *format, va_list ap)
  32 {
  33     char    fmt[BUFSIZ];
  34
  35     if (tcpd_context.file)
  36         sprintf(fmt, "%s: %s, line %d: %s",
  37                 tag, tcpd_context.file, tcpd_context.line, format);
  38     else
  39         sprintf(fmt, "%s: %s", tag, format);
  40     vsyslog(severity, fmt, ap);
  41 }
  42
  43 /* tcpd_warn - report problem of some sort and proceed */
  44
  45 void
  46 tcpd_warn(const char *format, ...)
  47 {
  48     va_list ap;
  49
  50     va_start(ap, format);
  51     tcpd_diag(LOG_ERR, "warning", format, ap);
  52     va_end(ap);
  53 }
  54
  55 /* tcpd_jump - report serious problem and jump */
  56
  57 void
  58 tcpd_jump(const char *format, ...)
  59 {
  60     va_list ap;
  61
  62     va_start(ap, format);
  63     tcpd_diag(LOG_ERR, "error", format, ap);
  64     va_end(ap);
  65     longjmp(tcpd_buf, AC_ERROR);
  66 }