source: trunk/src/kmk/kmkbuiltin/err.c@ 3131

Last change on this file since 3131 was 3065, checked in by bird, 8 years ago

misc gcc warning fixes
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 5.4 KB
Line 
1/* $Id: err.c 3065 2017-09-30 12:52:35Z bird $ */
2/** @file
3 * Override err.h so we get the program name right.
4 */
5
6/*
7 * Copyright (c) 2005-2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
8 *
9 * This file is part of kBuild.
10 *
11 * kBuild is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * kBuild is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with kBuild. If not, see <http://www.gnu.org/licenses/>
23 *
24 */
25
26/*******************************************************************************
27* Header Files *
28*******************************************************************************/
29#include "config.h"
30#include <stdio.h>
31#include <stdarg.h>
32#include <string.h>
33#include <errno.h>
34#include "err.h"
35
36#ifdef KBUILD_OS_WINDOWS
37/* This is a trick to speed up console output on windows. */
38# undef fwrite
39# define fwrite maybe_con_fwrite
40extern size_t maybe_con_fwrite(void const *, size_t, size_t, FILE *);
41#endif
42
43
44/** The current program name. */
45const char *g_progname = "kmk";
46
47
48int err(int eval, const char *fmt, ...)
49{
50 va_list args;
51 int error = errno;
52
53 /* stderr is unbuffered, so try format the whole message and print it in
54 one go so it won't be split by other output. */
55 char szMsg[4096];
56 int cchMsg = snprintf(szMsg, sizeof(szMsg), "%s: ", g_progname);
57 if (cchMsg < (int)sizeof(szMsg) - 1 && cchMsg > 0)
58 {
59 int cchMsg2;
60 va_start(args, fmt);
61 cchMsg += cchMsg2 = vsnprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, fmt, args);
62 va_end(args);
63
64 if ( cchMsg < (int)sizeof(szMsg) - 1
65 && cchMsg2 >= 0)
66 {
67 cchMsg += cchMsg2 = snprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, ": %s\n", strerror(error));
68 if ( cchMsg < (int)sizeof(szMsg) - 1
69 && cchMsg2 >= 0)
70 {
71 fwrite(szMsg, cchMsg, 1, stderr);
72 return eval;
73 }
74
75 }
76
77 }
78
79 /* fallback */
80 fprintf(stderr, "%s: ", g_progname);
81 va_start(args, fmt);
82 vfprintf(stderr, fmt, args);
83 va_end(args);
84 fprintf(stderr, ": %s\n", strerror(error));
85
86 return eval;
87}
88
89
90int errx(int eval, const char *fmt, ...)
91{
92 va_list args;
93
94 /* stderr is unbuffered, so try format the whole message and print it in
95 one go so it won't be split by other output. */
96 char szMsg[4096];
97 int cchMsg = snprintf(szMsg, sizeof(szMsg), "%s: ", g_progname);
98 if (cchMsg < (int)sizeof(szMsg) - 1 && cchMsg > 0)
99 {
100 int cchMsg2;
101 va_start(args, fmt);
102 cchMsg += cchMsg2 = vsnprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, fmt, args);
103 va_end(args);
104
105 if ( cchMsg < (int)sizeof(szMsg) - 1
106 && cchMsg2 >= 0)
107 {
108 szMsg[cchMsg++] = '\n';
109 fwrite(szMsg, cchMsg, 1, stderr);
110 return eval;
111 }
112
113 }
114
115 /* fallback */
116 fprintf(stderr, "%s: ", g_progname);
117 va_start(args, fmt);
118 vfprintf(stderr, fmt, args);
119 va_end(args);
120 fprintf(stderr, "\n");
121
122 return eval;
123}
124
125void warn(const char *fmt, ...)
126{
127 int error = errno;
128 va_list args;
129
130 /* stderr is unbuffered, so try format the whole message and print it in
131 one go so it won't be split by other output. */
132 char szMsg[4096];
133 int cchMsg = snprintf(szMsg, sizeof(szMsg), "%s: ", g_progname);
134 if (cchMsg < (int)sizeof(szMsg) - 1 && cchMsg > 0)
135 {
136 int cchMsg2;
137 va_start(args, fmt);
138 cchMsg += cchMsg2 = vsnprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, fmt, args);
139 va_end(args);
140
141 if ( cchMsg < (int)sizeof(szMsg) - 1
142 && cchMsg2 >= 0)
143 {
144 cchMsg += cchMsg2 = snprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, ": %s\n", strerror(error));
145 if ( cchMsg < (int)sizeof(szMsg) - 1
146 && cchMsg2 >= 0)
147 {
148 fwrite(szMsg, cchMsg, 1, stderr);
149 return;
150 }
151
152 }
153 }
154
155 /* fallback */
156 fprintf(stderr, "%s: ", g_progname);
157 va_start(args, fmt);
158 vfprintf(stderr, fmt, args);
159 va_end(args);
160 fprintf(stderr, ": %s\n", strerror(error));
161}
162
163void warnx(const char *fmt, ...)
164{
165 va_list args;
166
167 /* stderr is unbuffered, so try format the whole message and print it in
168 one go so it won't be split by other output. */
169 char szMsg[4096];
170 int cchMsg = snprintf(szMsg, sizeof(szMsg), "%s: ", g_progname);
171 if (cchMsg < (int)sizeof(szMsg) - 1 && cchMsg > 0)
172 {
173 int cchMsg2;
174 va_start(args, fmt);
175 cchMsg += cchMsg2 = vsnprintf(&szMsg[cchMsg], sizeof(szMsg) - cchMsg, fmt, args);
176 va_end(args);
177
178 if ( cchMsg < (int)sizeof(szMsg) - 1
179 && cchMsg2 >= 0)
180 {
181 szMsg[cchMsg++] = '\n';
182 fwrite(szMsg, cchMsg, 1, stderr);
183 return;
184 }
185
186 }
187
188 /* fallback */
189 fprintf(stderr, "%s: ", g_progname);
190 va_start(args, fmt);
191 vfprintf(stderr, fmt, args);
192 va_end(args);
193 fprintf(stderr, "\n");
194}
195
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