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ctrace.c revision 1.18 
      1 /*	$NetBSD: ctrace.c,v 1.18 2007/01/22 21:14:53 jdc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)ctrace.c	8.2 (Berkeley) 10/5/93";
     36 #else
     37 __RCSID("$NetBSD: ctrace.c,v 1.18 2007/01/22 21:14:53 jdc Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #ifdef DEBUG
     42 #include <stdarg.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 
     46 #include <sys/time.h>
     47 #include <string.h>
     48 
     49 #include "curses.h"
     50 #include "curses_private.h"
     51 
     52 #ifndef TFILE
     53 #define	TFILE	"__curses.out"
     54 #endif
     55 
     56 static FILE *tracefp = NULL;		/* Curses debugging file descriptor. */
     57 
     58 static int tracemask;	/* Areas of trace output we want. */
     59 
     60 static int init_done = 0;
     61 
     62 void
     63 __CTRACE_init()
     64 {
     65 	char *tf, *tm;
     66 
     67 	tm = getenv("CURSES_TRACE_MASK");
     68 	if (tm == NULL)
     69 		tracemask = __CTRACE_ALL;
     70 	else {
     71 		tracemask = (int) strtol(tm, NULL, 0);
     72 	}
     73 	if (tracemask < 0)
     74 		tracemask = (0 - tracemask) ^ __CTRACE_ALL;
     75 	if (tracemask == 0)
     76 		return;
     77 	tf = getenv("CURSES_TRACE_FILE");
     78 	if (tf == NULL || strcmp( tf, "<none>"))
     79 		tracefp = fopen(tf ? tf : TFILE, "w");
     80 	init_done = 1;
     81 	__CTRACE(__CTRACE_ALL, "Trace mask: 0x%08x\n", tracemask);
     82 }
     83 
     84 void
     85 __CTRACE(int area, const char *fmt,...)
     86 {
     87 	struct timeval tv;
     88         static int seencr = 1;
     89 	va_list ap;
     90 
     91 	if (!init_done)
     92 		__CTRACE_init();
     93 	if (tracefp == NULL || !(tracemask & area)) {
     94 		return;
     95 	}
     96 	gettimeofday(&tv, NULL);
     97         if (seencr && (tracemask & __CTRACE_TSTAMP)) {
     98                 gettimeofday(&tv, NULL);
     99                 (void) fprintf(tracefp, "%lu.%06lu: ", tv.tv_sec, tv.tv_usec);
    100         }
    101 	va_start(ap, fmt);
    102         (void) vfprintf(tracefp, fmt, ap);
    103         seencr = (strchr(fmt, '\n') != NULL);
    104 	va_end(ap);
    105 	(void) fflush(tracefp);
    106 }
    107 #else
    108 /* this kills the empty translation unit message from lint... */
    109 void
    110 __cursesi_make_lint_shut_up_if_debug_not_defined(void);
    111 
    112 void
    113 __cursesi_make_lint_shut_up_if_debug_not_defined(void)
    114 {
    115 	return;
    116 }
    117 #endif
    118