diag.c revision 1.18
1/* $NetBSD: diag.c,v 1.18 2024/02/09 22:08:31 andvar 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 17static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20"; 18#else 19__RCSID("$NetBSD: diag.c,v 1.18 2024/02/09 22:08:31 andvar Exp $"); 20#endif 21#endif 22 23/* System libraries */ 24 25#include <syslog.h> 26#include <stdarg.h> 27#include <stdio.h> 28#include <stdlib.h> 29#include <setjmp.h> 30#include <string.h> 31#include <errno.h> 32 33/* Local stuff */ 34 35#include "tcpd.h" 36#include "expandm.h" 37 38struct tcpd_context tcpd_context; 39jmp_buf tcpd_buf; 40 41static void tcpd_diag(int, const char *, const char *, va_list) 42 __sysloglike(3,0); 43 44/* tcpd_diag - centralize error reporter */ 45 46static void 47tcpd_diag(int severity, const char *tag, const char *fmt, va_list ap) 48{ 49 char *buf, *bufx; 50 51 if (vasprintf(&buf, expandm(fmt, NULL, &bufx), ap) == -1) 52 buf = __UNCONST(fmt); 53 free(bufx); 54 55 /* construct the tag for the log entry */ 56 if (tcpd_context.file) 57 syslog(severity, "%s: %s, line %d: %s", 58 tag, tcpd_context.file, tcpd_context.line, buf); 59 else 60 syslog(severity, "%s: %s", tag, buf); 61 62 if (buf != fmt) 63 free(buf); 64} 65 66/* tcpd_warn - report problem of some sort and proceed */ 67 68void 69tcpd_warn(const char *format, ...) 70{ 71 va_list ap; 72 73 va_start(ap, format); 74 tcpd_diag(LOG_ERR, "warning", format, ap); 75 va_end(ap); 76} 77 78/* tcpd_jump - report serious problem and jump */ 79 80void 81tcpd_jump(const char *format, ...) 82{ 83 va_list ap; 84 85 va_start(ap, format); 86 tcpd_diag(LOG_ERR, "error", format, ap); 87 va_end(ap); 88 longjmp(tcpd_buf, AC_ERROR); 89} 90