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diag.c revision 1.6 
      1 /*	$NetBSD: diag.c,v 1.6 2000/10/04 16:24:49 sommerfeld Exp $	*/
      2 
      3  /*
      4   * Routines to report various classes of problems. Each report is decorated
      5   * with the current context (file name and line number), if available.
      6   *
      7   * tcpd_warn() reports a problem and proceeds.
      8   *
      9   * tcpd_jump() reports a problem and jumps.
     10   *
     11   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
     12   */
     13 
     14 #include <sys/cdefs.h>
     15 #ifndef lint
     16 #if 0
     17 static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
     18 #else
     19 __RCSID("$NetBSD: diag.c,v 1.6 2000/10/04 16:24:49 sommerfeld Exp $");
     20 #endif
     21 #endif
     22 
     23 /* System libraries */
     24 
     25 #include <syslog.h>
     26 #include <stdio.h>
     27 #include <setjmp.h>
     28 
     29 /* Local stuff */
     30 
     31 #include "tcpd.h"
     32 #include "mystdarg.h"
     33 
     34 struct tcpd_context tcpd_context;
     35 jmp_buf tcpd_buf;
     36 
     37 static void tcpd_diag __P((int, char *, char *, va_list))
     38 	__attribute__((__format__(__printf__, 3, 0)));
     39 
     40 /* tcpd_diag - centralize error reporter */
     41 
     42 static void tcpd_diag(severity, tag, format, ap)
     43 int     severity;
     44 char   *tag;
     45 char   *format;
     46 va_list ap;
     47 {
     48     char    fmt[BUFSIZ];
     49     char    buf[BUFSIZ];
     50 
     51     vsnprintf(buf, sizeof(buf), format, ap);
     52 
     53     if (tcpd_context.file)
     54 	(void)snprintf(fmt, sizeof fmt, "%s: %s, line %d",
     55 		tag, tcpd_context.file, tcpd_context.line);
     56     else
     57 	(void)snprintf(fmt, sizeof fmt, "%s", tag);
     58     syslog(severity, "%s: %s", fmt, buf);
     59 }
     60 
     61 /* tcpd_warn - report problem of some sort and proceed */
     62 
     63 void    VARARGS(tcpd_warn, char *, format)
     64 {
     65     va_list ap;
     66 
     67     VASTART(ap, char *, format);
     68     tcpd_diag(LOG_ERR, "warning", format, ap);
     69     VAEND(ap);
     70 }
     71 
     72 /* tcpd_jump - report serious problem and jump */
     73 
     74 void    VARARGS(tcpd_jump, char *, format)
     75 {
     76     va_list ap;
     77 
     78     VASTART(ap, char *, format);
     79     tcpd_diag(LOG_ERR, "error", format, ap);
     80     VAEND(ap);
     81     longjmp(tcpd_buf, AC_ERROR);
     82 }
     83