kernel - TMPFS - Stabilization pass, fix lockf()
[dragonfly.git] / contrib / com_err / com_err.c
blobfc15e9a914c156b9c32125d64d41e466e6910ad1
1 /*
2 * Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Kungliga Tekniska
20 * Högskolan and its contributors.
22 * 4. Neither the name of the Institute nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
39 #ifdef HAVE_CONFIG_H
40 #include <config.h>
41 RCSID("$Id: com_err.c,v 1.13 1999/03/12 15:17:08 bg Exp $");
42 #endif
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include "com_err.h"
48 struct et_list *_et_list;
51 const char *
52 error_message (long code)
54 static char msg[128];
55 const char *p = com_right(_et_list, code);
56 if (p == NULL)
57 p = strerror(code);
58 if (p != NULL && *p != '\0') {
59 strncpy(msg, p, sizeof(msg) - 1);
60 msg[sizeof(msg) - 1] = 0;
61 } else
62 sprintf(msg, "Unknown error %ld", code);
63 return msg;
66 int
67 init_error_table(const char **msgs, long base, int count)
69 initialize_error_table_r(&_et_list, msgs, count, base);
70 return 0;
73 static void
74 default_proc (const char *whoami, long code, const char *fmt, va_list args)
76 if (whoami)
77 fprintf(stderr, "%s: ", whoami);
78 if (code)
79 fprintf(stderr, "%s ", error_message(code));
80 if (fmt)
81 vfprintf(stderr, fmt, args);
82 fprintf(stderr, "\r\n"); /* ??? */
85 static errf com_err_hook = default_proc;
87 void
88 com_err_va (const char *whoami,
89 long code,
90 const char *fmt,
91 va_list args)
93 (*com_err_hook) (whoami, code, fmt, args);
96 void
97 com_err (const char *whoami,
98 long code,
99 const char *fmt,
100 ...)
102 va_list ap;
103 va_start(ap, fmt);
104 com_err_va (whoami, code, fmt, ap);
105 va_end(ap);
108 errf
109 set_com_err_hook (errf new)
111 errf old = com_err_hook;
113 if (new)
114 com_err_hook = new;
115 else
116 com_err_hook = default_proc;
118 return old;
121 errf
122 reset_com_err_hook (void)
124 return set_com_err_hook(NULL);
127 #define ERRCODE_RANGE 8 /* # of bits to shift table number */
128 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */
130 static const char char_set[] =
131 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
133 static char buf[6];
135 const char *
136 error_table_name(int num)
138 int ch;
139 int i;
140 char *p;
142 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
143 p = buf;
144 num >>= ERRCODE_RANGE;
145 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
146 num &= 077777777;
147 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
148 for (i = 4; i >= 0; i--) {
149 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
150 if (ch != 0)
151 *p++ = char_set[ch-1];
153 *p = '\0';
154 return(buf);