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 /*
28 * errlog -- error logging facility for application programs
29 */
30
31 #include <stdio.h>
32 #include <stdarg.h>
33 #include <stdlib.h>
34 #include "errlog.h"
35
36 /* Statics (this object is not threadable). */
37 static int Severity;
38 static struct location {
39 char *l_file;
40 int l_lineno;
41 char *l_tag;
42 char *l_line;
43 } Location;
44
45 /* Indentation */
46 static int Trace_indent;
47 /* XXX YES, its 80 spaces !@#$%^ */
48 static char Trace_padding[] =
49 " "
50 " ";
51
52 #define INDENT &Trace_padding[80-(Trace_indent*4)]
53 #define PRINTHDR INPUT
54
55 /*
56 * errlog -- simulate the syslog printf-like interface, but
57 * with a first argument oriented toward reporting
58 * application errors.
59 */
60 /*VARARGS2*/
61 void
errlog(const int descriptor,const char * format,...)62 errlog(const int descriptor, const char *format, ...)
63 {
64 va_list ap;
65
66 va_start(ap, format);
67 if ((Severity < (descriptor & FATAL)) &&
68 ((descriptor & FATAL) != FATAL)) {
69 /* We don't need to say/do anything. */
70 return;
71 }
72
73 /* Produce the message. */
74 (void) fflush(stdout); /* Synchronize streams. */
75 if ((descriptor & PRINTHDR) != 0) {
76 if (Location.l_file == NULL) {
77 (void) fprintf(stderr, "programmer error, logerr "
78 "told to print file, line number, "
79 "but file was not set.\n");
80 } else {
81 (void) fprintf(stderr, "\"%s\", line %d: ",
82 Location.l_file, Location.l_lineno);
83 }
84 }
85
86 /* Indent/outdent. */
87 if (descriptor & INDENTED) {
88 (void) fprintf(stderr, "%s", INDENT);
89 Trace_indent = (Trace_indent < 20)? Trace_indent + 1: 20;
90 } else if (descriptor & OUTDENTED) {
91 Trace_indent = (Trace_indent > 0)? Trace_indent - 1: 0;
92 (void) fprintf(stderr, "%s", INDENT);
93 } else {
94 (void) fprintf(stderr, "%s", INDENT);
95 }
96
97 /* Print the stuff we did all this for. */
98 (void) vfprintf(stderr, format, ap);
99
100 if ((descriptor & INPUT) && Location.l_line != NULL) {
101 /* Emit trailers. Formatting TBD. */
102 (void) putc('\n', stderr);
103 (void) fprintf(stderr, "\tLine was: %s %s",
104 Location.l_tag, Location.l_line);
105 }
106 (void) putc('\n', stderr);
107 (void) fflush(stderr); /* No-op on Solaris. */
108
109 if ((descriptor & FATAL) == FATAL) {
110 /* Say goodbye! */
111 exit(1);
112 }
113 va_end(ap);
114 }
115
116 /*
117 * seterrline -- tell errlog what the context of the error is.
118 */
119 void
seterrline(const int lineno,const char * file,const char * tag,const char * line)120 seterrline(const int lineno, const char *file,
121 const char *tag, const char *line)
122 {
123 Location.l_lineno = lineno;
124 Location.l_file = (char *)file;
125 Location.l_tag = (char *)tag;
126 Location.l_line = (char *)line;
127 }
128
129 /*
130 * seterrseverity -- set the severity/loudness variable.
131 * This is traditionally the ``Verbosity'' level.
132 */
133 void
seterrseverity(const int loudness)134 seterrseverity(const int loudness)
135 {
136 Severity = (loudness & FATAL);
137 }
138