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 17 static 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 38 struct tcpd_context tcpd_context; 39 jmp_buf tcpd_buf; 40 41 static void tcpd_diag(int, const char *, const char *, va_list) 42 __sysloglike(3,0); 43 44 /* tcpd_diag - centralize error reporter */ 45 46 static void 47 tcpd_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 68 void 69 tcpd_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 80 void 81 tcpd_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