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diag.c revision 1.1 
      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 
     12 #ifndef lint
     13 static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
     14 #endif
     15 
     16 /* System libraries */
     17 
     18 #include <syslog.h>
     19 #include <stdio.h>
     20 #include <setjmp.h>
     21 
     22 /* Local stuff */
     23 
     24 #include "tcpd.h"
     25 #include "mystdarg.h"
     26 
     27 struct tcpd_context tcpd_context;
     28 jmp_buf tcpd_buf;
     29 
     30 /* tcpd_diag - centralize error reporter */
     31 
     32 static void tcpd_diag(severity, tag, format, ap)
     33 int     severity;
     34 char   *tag;
     35 char   *format;
     36 va_list ap;
     37 {
     38     char    fmt[BUFSIZ];
     39 
     40     if (tcpd_context.file)
     41 	sprintf(fmt, "%s: %s, line %d: %s",
     42 		tag, tcpd_context.file, tcpd_context.line, format);
     43     else
     44 	sprintf(fmt, "%s: %s", tag, format);
     45     vsyslog(severity, fmt, ap);
     46 }
     47 
     48 /* tcpd_warn - report problem of some sort and proceed */
     49 
     50 void    VARARGS(tcpd_warn, char *, format)
     51 {
     52     va_list ap;
     53 
     54     VASTART(ap, char *, format);
     55     tcpd_diag(LOG_ERR, "warning", format, ap);
     56     VAEND(ap);
     57 }
     58 
     59 /* tcpd_jump - report serious problem and jump */
     60 
     61 void    VARARGS(tcpd_jump, char *, format)
     62 {
     63     va_list ap;
     64 
     65     VASTART(ap, char *, format);
     66     tcpd_diag(LOG_ERR, "error", format, ap);
     67     VAEND(ap);
     68     longjmp(tcpd_buf, AC_ERROR);
     69 }
     70