1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * errlog -- error logging facility for application programs
31 */
32
33 #include <stdio.h>
34 #include <stdarg.h>
35 #include <stdlib.h>
36 #include "errlog.h"
37
38 /* Statics (this object is not threadable). */
39 static int Severity;
40 static struct location {
41 char *l_file;
42 int l_lineno;
43 char *l_tag;
44 char *l_line;
45 } Location;
46
47 /* Indentation */
48 static int Trace_indent;
49 /* XXX YES, its 80 spaces !@#$%^ */
50 static char Trace_padding[] =
51 " "
52 " ";
53
54 #define INDENT &Trace_padding[80-(Trace_indent*4)]
55 #define PRINTHDR INPUT
56
57 /*
58 * errlog -- simulate the syslog printf-like interface, but
59 * with a first argument oriented toward reporting
60 * application errors.
61 */
62 /*VARARGS2*/
63 void
errlog(const int descriptor,const char * format,...)64 errlog(const int descriptor, const char *format, ...)
65 {
66 va_list ap;
67
68 va_start(ap, format);
69 if ((Severity < (descriptor & FATAL)) &&
70 ((descriptor & FATAL) != FATAL)) {
71 /* We don't need to say/do anything. */
72 return;
73 }
74
75 /* Produce the message. */
76 (void) fflush(stdout); /* Synchronize streams. */
77 if ((descriptor & PRINTHDR) != 0) {
78 if (Location.l_file == NULL) {
79 (void) fprintf(stderr, "programmer error, logerr "
80 "told to print file, line number, "
81 "but file was not set.\n");
82 } else {
83 (void) fprintf(stderr, "\"%s\", line %d: ",
84 Location.l_file, Location.l_lineno);
85 }
86 }
87
88 /* Indent/outdent. */
89 if (descriptor & INDENTED) {
90 (void) fprintf(stderr, "%s", INDENT);
91 Trace_indent = (Trace_indent < 20)? Trace_indent + 1: 20;
92 } else if (descriptor & OUTDENTED) {
93 Trace_indent = (Trace_indent > 0)? Trace_indent - 1: 0;
94 (void) fprintf(stderr, "%s", INDENT);
95 } else {
96 (void) fprintf(stderr, "%s", INDENT);
97 }
98
99 /* Print the stuff we did all this for. */
100 (void) vfprintf(stderr, format, ap);
101
102 if ((descriptor & INPUT) && Location.l_line != NULL) {
103 /* Emit trailers. Formatting TBD. */
104 (void) putc('\n', stderr);
105 (void) fprintf(stderr, "\tLine was: %s %s",
106 Location.l_tag, Location.l_line);
107 }
108 (void) putc('\n', stderr);
109 (void) fflush(stderr); /* No-op on Solaris. */
110
111 if ((descriptor & FATAL) == FATAL) {
112 /* Say goodbye! */
113 exit(1);
114 }
115 va_end(ap);
116 }
117
118 /*
119 * seterrline -- tell errlog what the context of the error is.
120 */
121 void
seterrline(const int lineno,const char * file,const char * tag,const char * line)122 seterrline(const int lineno, const char *file,
123 const char *tag, const char *line)
124 {
125 Location.l_lineno = lineno;
126 Location.l_file = (char *)file;
127 Location.l_tag = (char *)tag;
128 Location.l_line = (char *)line;
129 }
130
131 /*
132 * seterrseverity -- set the severity/loudness variable.
133 * This is traditionally the ``Verbosity'' level.
134 */
135 void
seterrseverity(const int loudness)136 seterrseverity(const int loudness)
137 {
138 Severity = (loudness & FATAL);
139 }
140