Mercurial > projects > pwm

annotate compat/err.c @ 33:fa93d2ff9c62

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Prevent potential division by zero Add safeguard ensuring that there is at least one possible character to generate passwords from in order to exclude the possibility of a division by zero error in rand_uniform.
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Tue, 30 Jul 2019 20:38:08 +0200
parents a7e41e1a79c8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
1 /*
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
2 * Copyright (C) 2011 Guido Berhoerster <guido+pwm@berhoerster.name>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
3 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
4 * Permission is hereby granted, free of charge, to any person obtaining
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
5 * a copy of this software and associated documentation files (the
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
6 * "Software"), to deal in the Software without restriction, including
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
7 * without limitation the rights to use, copy, modify, merge, publish,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
8 * distribute, sublicense, and/or sell copies of the Software, and to
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
9 * permit persons to whom the Software is furnished to do so, subject to
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
10 * the following conditions:
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
11 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
12 * The above copyright notice and this permission notice shall be included
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
13 * in all copies or substantial portions of the Software.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
14 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
22 */
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
23
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
24 #include <stdlib.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
25 #include <stdio.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
26 #include <string.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
27 #include <errno.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
28
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
29 #include "err.h"
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
30 #include "../compat.h"
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
31
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
32 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
33 err(int eval, const char *fmt, ...)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
34 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
35 va_list args;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
36
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
37 va_start(args, fmt);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
38 vwarn(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
39 va_end(args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
40
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
41 exit(eval);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
42 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
43
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
44 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
45 errx(int eval, const char *fmt, ...)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
46 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
47 va_list args;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
48
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
49 va_start(args, fmt);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
50 vwarnx(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
51 va_end(args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
52
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
53 exit(eval);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
54 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
55
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
56 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
57 warn(const char *fmt, ...)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
58 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
59 va_list args;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
60
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
61 va_start(args, fmt);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
62 vwarn(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
63 va_end(args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
64 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
65
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
66 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
67 warnx(const char *fmt, ...)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
68 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
69 va_list args;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
70
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
71 va_start(args, fmt);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
72 vwarnx(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
73 va_end(args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
74 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
75
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
76 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
77 verr(int eval, const char *fmt, va_list args)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
78 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
79 vwarn(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
80
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
81 exit(eval);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
82 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
83
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
84 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
85 verrx(int eval, const char *fmt, va_list args)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
86 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
87 vwarnx(fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
88
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
89 exit(eval);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
90 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
91
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
92 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
93 vwarn(const char *fmt, va_list args)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
94 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
95 int old_errno = errno;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
96
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
97 fprintf(stderr, "%s: ", getprogname());
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
98 if (fmt != NULL) {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
99 vfprintf(stderr, fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
100 fprintf(stderr, ": ");
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
101 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
102 fprintf(stderr, "%s\n", strerror(old_errno));
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
103 errno = old_errno;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
104 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
105
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
106 void
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
107 vwarnx(const char *fmt, va_list args)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
108 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
109 fprintf(stderr, "%s: ", getprogname());
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
110 if (fmt != NULL) {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
111 vfprintf(stderr, fmt, args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
112 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
113 fputc('\n', stderr);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
114 }