1 /* $NetBSD: ctrace.c,v 1.24 2024/06/09 13:02:24 rillig 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 #if 0
34 static char sccsid[] = "@(#)ctrace.c 8.2 (Berkeley) 10/5/93";
35 #else
36 __RCSID("$NetBSD: ctrace.c,v 1.24 2024/06/09 13:02:24 rillig Exp $");
37 #endif
38
39 #ifdef DEBUG
40 #include <stdarg.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43
44 #include <sys/time.h>
45 #include <string.h>
46
47 #include "curses.h"
48 #include "curses_private.h"
49
50 static FILE *tracefp = NULL; /* Curses debugging file descriptor. */
51
52 static int tracemask; /* Areas of trace output we want. */
53
54 static int init_done = 0;
55
56 static void
__CTRACE_init(void)57 __CTRACE_init(void)
58 {
59 char *tf, *tm;
60
61 tm = getenv("CURSES_TRACE_MASK");
62 if (tm == NULL)
63 tracemask = __CTRACE_ALL;
64 else
65 tracemask = (int)strtol(tm, NULL, 0);
66 if (tracemask < 0)
67 tracemask = (0 - tracemask) ^ __CTRACE_ALL;
68 if (tracemask == 0)
69 return;
70
71 tf = getenv("CURSES_TRACE_FILE");
72
73 if ((tf != NULL) && !strcmp( tf, "<none>"))
74 tf = NULL;
75
76 if (tf != NULL)
77 tracefp = fopen(tf, "w");
78
79 init_done = 1;
80 __CTRACE(__CTRACE_ALL, "Trace mask: 0x%08x\n", tracemask);
81 }
82
83 void
__CTRACE(int area,const char * fmt,...)84 __CTRACE(int area, const char *fmt,...)
85 {
86 static int seencr = 1;
87 va_list ap;
88
89 if (!init_done)
90 __CTRACE_init();
91 if (tracefp == NULL || !(tracemask & area))
92 return;
93
94 if (seencr && (tracemask & __CTRACE_TSTAMP)) {
95 struct timeval tv;
96 gettimeofday(&tv, NULL);
97 (void)fprintf(tracefp, "%llu.%06lu: ",
98 (long long)tv.tv_sec, (long)tv.tv_usec);
99 }
100 va_start(ap, fmt);
101 (void)vfprintf(tracefp, fmt, ap);
102 seencr = (strchr(fmt, '\n') != NULL);
103 va_end(ap);
104 (void)fflush(tracefp);
105 }
106 #else
107 /* Prevent an 'empty translation unit' message from lint. */
108 typedef int dummy;
109 #endif
110