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annotate err.c @ 10:8e9dd5328b5a

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Print a warning message when using an insecure algorithm
author Guido Berhoerster <guido+sencrypt@berhoerster.name>
date Sat, 03 Sep 2016 14:02:42 +0200
parents 73af139d1a94
children
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1 /*
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2 * Copyright (C) 2011 Guido Berhoerster <guido+sencrypt@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
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5 * a copy of this software and associated documentation files (the
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6 * "Software"), to deal in the Software without restriction, including
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7 * without limitation the rights to use, copy, modify, merge, publish,
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8 * distribute, sublicense, and/or sell copies of the Software, and to
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9 * permit persons to whom the Software is furnished to do so, subject to
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
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13 * in all copies or substantial portions of the Software.
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #include <stdlib.h>
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25 #include <stdio.h>
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26 #include <string.h>
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27 #include <errno.h>
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28
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29 #include "err.h"
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30
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31 static char __progname[] = "unknown";
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32
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33 void
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34 err(int eval, const char *fmt, ...)
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35 {
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36 va_list args;
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37
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38 va_start(args, fmt);
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39 vwarn(fmt, args);
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40 va_end(args);
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41
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42 exit(eval);
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43 }
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44
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45 void
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46 errx(int eval, const char *fmt, ...)
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47 {
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48 va_list args;
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49
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50 va_start(args, fmt);
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51 vwarnx(fmt, args);
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52 va_end(args);
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53
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54 exit(eval);
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55 }
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56
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57 void
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58 warn(const char *fmt, ...)
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59 {
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60 va_list args;
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61
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62 va_start(args, fmt);
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63 vwarn(fmt, args);
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64 va_end(args);
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65 }
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66
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67 void
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68 warnx(const char *fmt, ...)
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69 {
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70 va_list args;
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71
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72 va_start(args, fmt);
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73 vwarnx(fmt, args);
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74 va_end(args);
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75 }
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76
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77 void
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78 verr(int eval, const char *fmt, va_list args)
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79 {
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80 vwarn(fmt, args);
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81
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82 exit(eval);
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83 }
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84
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85 void
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86 verrx(int eval, const char *fmt, va_list args)
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87 {
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88 vwarnx(fmt, args);
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89
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90 exit(eval);
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91 }
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92
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93 void
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94 vwarn(const char *fmt, va_list args)
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95 {
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96 int old_errno = errno;
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97
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98 fprintf(stderr, "%s: ", __progname);
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99 if (fmt != NULL) {
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100 vfprintf(stderr, fmt, args);
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101 fprintf(stderr, ": ");
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102 }
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103 fprintf(stderr, "%s\n", strerror(old_errno));
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104 errno = old_errno;
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105 }
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106
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107 void
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108 vwarnx(const char *fmt, va_list args)
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109 {
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110 fprintf(stderr, "%s: ", __progname);
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111 if (fmt != NULL) {
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112 vfprintf(stderr, fmt, args);
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113 }
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114 fputc('\n', stderr);
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115 }