1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* errno.c -- look up errno names and descriptions
* Copyright 2012 Lars Wirzenius (liw@iki.fi)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _GNU_SOURCE
#include <ctype.h>
#include <errno.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
static struct {
const char *name;
int code;
} errnos[] = {
#include "errnos.h"
};
static const int num_errnos = sizeof(errnos) / sizeof(errnos[0]);
static void
report(const char *name, int code)
{
printf("%s %d %s\n", name, code, strerror(code));
}
static bool
report_from_name(const char *name)
{
int i;
for (i = 0; i < num_errnos; ++i) {
if (strcasecmp(errnos[i].name, name) == 0) {
report(errnos[i].name, errnos[i].code);
return true;
}
}
return false;
}
static bool
report_from_code(int code)
{
int i;
for (i = 0; i < num_errnos; ++i) {
if (errnos[i].code == code) {
report(errnos[i].name, code);
return true;
}
}
return false;
}
static bool
matches(int code, int num_words, char **words)
{
const char *text = strerror(code);
int i;
for (i = 0; i < num_words; ++i) {
if (strcasestr(text, words[i]) == NULL)
return false;
}
return true;
}
static void
search(int num_words, char **words)
{
int i;
for (i = 0; i < num_errnos; ++i) {
if (matches(errnos[i].code, num_words, words))
report(errnos[i].name, errnos[i].code);
}
}
static void
search_all(int num_words, char **words)
{
FILE *f;
/* Static buffers are ugly, but they're simple. If anyone has a
locale name longer than a kilobyte, they will suffer, and they
will complain, and then I will fix this. */
char line[1024];
f = popen("locale -a", "r");
if (f == NULL) {
fprintf(stderr, "ERROR: Can't execute locale -a: %d: %s\n",
errno, strerror(errno));
exit(EXIT_FAILURE);
}
while (fgets(line, sizeof line, f) != NULL) {
line[strcspn(line, "\n")] = '\0';
setlocale(LC_ALL, line);
search(num_words, words);
}
fclose(f);
}
static struct option
options[] = {
{ "help", 0, NULL, 'h' },
{ "list", 0, NULL, 'l' },
{ "search", 0, NULL, 's' },
{ "search-all-locales", 0, NULL, 'S' },
{ 0, 0, 0, 0 }
};
static void
usage(void)
{
printf("Usage: errno [-lsS] [--list] [--search] [--search-all-locales] "
"[keyword]\n");
}
int
main(int argc, char **argv)
{
int i;
int exit_code;
int index = 0;
enum {
lookup_mode,
list_mode,
search_mode,
search_all_mode
} mode = lookup_mode;
setlocale(LC_ALL, "");
for (;;) {
int c = getopt_long(argc, argv, "hlsS", options, &index);
if (c == -1)
break;
switch (c) {
case 'h':
usage();
return EXIT_SUCCESS;
case 'l':
mode = list_mode;
break;
case 's':
mode = search_mode;
break;
case 'S':
mode = search_all_mode;
break;
case '?':
break;
default:
fprintf(stderr, "getopt returned 0x%02x\n", c);
return EXIT_FAILURE;
}
}
exit_code = EXIT_SUCCESS;
switch (mode) {
case lookup_mode:
for (i = optind; i < argc; ++i) {
const char *arg = argv[i];
if (toupper(arg[0]) == 'E') {
if (!report_from_name(arg))
exit_code = EXIT_FAILURE;
} else if (isdigit(arg[0])) {
if (!report_from_code(atoi(arg)))
exit_code = EXIT_FAILURE;
} else {
fprintf(stderr, "ERROR: Not understood: %s\n", arg);
exit_code = EXIT_FAILURE;
}
}
break;
case list_mode:
for (i = 0; i < num_errnos; ++i)
report(errnos[i].name, errnos[i].code);
break;
case search_mode:
search(argc - optind, argv + optind);
break;
case search_all_mode:
search_all(argc - optind, argv + optind);
break;
}
return exit_code;
}
|
