annotate lib/error.c @ 4636:8b869710f671

Remove K&R cruft.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 08 Sep 2003 23:26:06 +0000
parents cdb224406ea7
children 0ec32cb1202f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Error handler for noninteractive utilities
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2 Copyright (C) 1990-1998, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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3 This program is free software; you can redistribute it and/or modify
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4 it under the terms of the GNU General Public License as published by
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5 the Free Software Foundation; either version 2, or (at your option)
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6 any later version.
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7
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8 This program is distributed in the hope that it will be useful,
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9 but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License along
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14 with this program; if not, write to the Free Software Foundation,
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15 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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16
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17 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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18
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19 #ifdef HAVE_CONFIG_H
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20 # include <config.h>
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21 #endif
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22
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23 #include "error.h"
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24
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25 #include <stdarg.h>
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <string.h>
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29
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30 #ifdef _LIBC
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31 # include <libintl.h>
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32 #else
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33 # include "gettext.h"
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34 #endif
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35
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36 #ifdef _LIBC
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37 # include <wchar.h>
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38 # define mbsrtowcs __mbsrtowcs
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39 #endif
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40
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41 #if !_LIBC
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42 # include "unlocked-io.h"
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43 #endif
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44
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45 #ifndef _
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46 # define _(String) String
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47 #endif
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48
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49 /* If NULL, error will flush stdout, then print on stderr the program
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50 name, a colon and a space. Otherwise, error will call this
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51 function without parameters instead. */
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52 void (*error_print_progname) (void);
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53
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54 /* This variable is incremented each time `error' is called. */
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55 unsigned int error_message_count;
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56
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57 #ifdef _LIBC
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58 /* In the GNU C library, there is a predefined variable for this. */
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59
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60 # define program_name program_invocation_name
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61 # include <libio/libioP.h>
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62
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63 /* In GNU libc we want do not want to use the common name `error' directly.
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64 Instead make it a weak alias. */
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65 extern void __error (int status, int errnum, const char *message, ...)
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66 __attribute__ ((__format__ (__printf__, 3, 4)));
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67 extern void __error_at_line (int status, int errnum, const char *file_name,
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68 unsigned int line_number, const char *message,
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69 ...)
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70 __attribute__ ((__format__ (__printf__, 5, 6)));;
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71 # define error __error
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72 # define error_at_line __error_at_line
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73
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74 # include <libio/iolibio.h>
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75 # define fflush(s) INTUSE(_IO_fflush) (s)
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76 # undef putc
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77 # define putc(c, fp) INTUSE(_IO_putc) (c, fp)
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78
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79 #else /* not _LIBC */
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80
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81 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
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82 # ifndef HAVE_DECL_STRERROR_R
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83 "this configure-time declaration test was not run"
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84 # endif
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85 char *strerror_r ();
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86 # endif
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87
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88 /* The calling program should define program_name and set it to the
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89 name of the executing program. */
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90 extern char *program_name;
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91
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92 # if HAVE_STRERROR_R || defined strerror_r
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93 # define __strerror_r strerror_r
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94 # endif
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95 #endif /* not _LIBC */
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96
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97 static void
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98 print_errno_message (int errnum)
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99 {
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100 char const *s;
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101
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102 #if defined HAVE_STRERROR_R || _LIBC
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103 char errbuf[1024];
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104 # if STRERROR_R_CHAR_P || _LIBC
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105 s = __strerror_r (errnum, errbuf, sizeof errbuf);
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106 # else
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107 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
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108 s = errbuf;
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109 else
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110 s = 0;
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111 # endif
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112 #else
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113 s = strerror (errnum);
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114 #endif
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115
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116 #if !_LIBC
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117 if (! s)
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118 s = _("Unknown system error");
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119 #endif
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120
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121 #if _LIBC
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122 if (_IO_fwide (stderr, 0) > 0)
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123 {
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124 __fwprintf (stderr, L": %s", s);
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125 return;
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126 }
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127 #endif
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128
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129 fprintf (stderr, ": %s", s);
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130 }
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131
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132 static void
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133 error_tail (int status, int errnum, const char *message, va_list args)
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134 {
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135 # if HAVE_VPRINTF || _LIBC
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136 # if _LIBC
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137 if (_IO_fwide (stderr, 0) > 0)
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138 {
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139 # define ALLOCA_LIMIT 2000
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140 size_t len = strlen (message) + 1;
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141 wchar_t *wmessage = NULL;
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142 mbstate_t st;
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143 size_t res;
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144 const char *tmp;
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145
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146 do
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147 {
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148 if (len < ALLOCA_LIMIT)
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149 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
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150 else
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151 {
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152 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
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153 wmessage = NULL;
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154
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155 wmessage = (wchar_t *) realloc (wmessage,
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156 len * sizeof (wchar_t));
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157
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158 if (wmessage == NULL)
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159 {
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160 fputws_unlocked (L"out of memory\n", stderr);
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161 return;
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162 }
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163 }
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164
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165 memset (&st, '\0', sizeof (st));
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166 tmp =message;
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167 }
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168 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
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169
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170 if (res == (size_t) -1)
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171 /* The string cannot be converted. */
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172 wmessage = (wchar_t *) L"???";
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173
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174 __vfwprintf (stderr, wmessage, args);
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175 }
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176 else
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177 # endif
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178 vfprintf (stderr, message, args);
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179 # else
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180 _doprnt (message, args, stderr);
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181 # endif
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182 va_end (args);
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183
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184 ++error_message_count;
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185 if (errnum)
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186 print_errno_message (errnum);
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187 # if _LIBC
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188 if (_IO_fwide (stderr, 0) > 0)
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189 putwc (L'\n', stderr);
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190 else
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191 # endif
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192 putc ('\n', stderr);
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193 fflush (stderr);
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194 if (status)
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195 exit (status);
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196 }
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197
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198
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199 /* Print the program name and error message MESSAGE, which is a printf-style
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200 format string with optional args.
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201 If ERRNUM is nonzero, print its corresponding system error message.
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202 Exit with status STATUS if it is nonzero. */
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203 /* VARARGS */
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204 void
398
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205 error (int status, int errnum, const char *message, ...)
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206 {
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207 va_list args;
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208
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209 fflush (stdout);
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210 #ifdef _LIBC
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211 _IO_flockfile (stderr);
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212 #endif
398
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213 if (error_print_progname)
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214 (*error_print_progname) ();
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215 else
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216 {
4500
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217 #if _LIBC
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218 if (_IO_fwide (stderr, 0) > 0)
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219 __fwprintf (stderr, L"%s: ", program_name);
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220 else
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221 #endif
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222 fprintf (stderr, "%s: ", program_name);
398
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223 }
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224
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225 va_start (args, message);
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226 error_tail (status, errnum, message, args);
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227
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228 #ifdef _LIBC
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229 _IO_funlockfile (stderr);
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230 #endif
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231 }
572
55f487a8aeab Update from libc.
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232
573
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233 /* Sometimes we want to have at most one error per line. This
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234 variable controls whether this mode is selected or not. */
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235 int error_one_per_line;
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236
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
237 void
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238 error_at_line (int status, int errnum, const char *file_name,
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
239 unsigned int line_number, const char *message, ...)
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240 {
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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241 va_list args;
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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242
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
243 if (error_one_per_line)
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
244 {
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
245 static const char *old_file_name;
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diff changeset
246 static unsigned int old_line_number;
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247
3446
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248 if (old_line_number == line_number
849a40d65bee Update from GNU libc.
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249 && (file_name == old_file_name
849a40d65bee Update from GNU libc.
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250 || strcmp (old_file_name, file_name) == 0))
573
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diff changeset
251 /* Simply return and print nothing. */
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
252 return;
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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253
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254 old_file_name = file_name;
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diff changeset
255 old_line_number = line_number;
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parents: 572
diff changeset
256 }
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
257
3446
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258 fflush (stdout);
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
259 #ifdef _LIBC
849a40d65bee Update from GNU libc.
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260 _IO_flockfile (stderr);
849a40d65bee Update from GNU libc.
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diff changeset
261 #endif
573
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
262 if (error_print_progname)
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
263 (*error_print_progname) ();
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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parents: 572
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264 else
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
265 {
4500
cdb224406ea7 [!USE_IN_LIBIO]: Omit this case; assume USE_IN_LIBIO is 1.
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parents: 4072
diff changeset
266 #if _LIBC
3446
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267 if (_IO_fwide (stderr, 0) > 0)
849a40d65bee Update from GNU libc.
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268 __fwprintf (stderr, L"%s: ", program_name);
849a40d65bee Update from GNU libc.
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269 else
849a40d65bee Update from GNU libc.
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diff changeset
270 #endif
849a40d65bee Update from GNU libc.
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271 fprintf (stderr, "%s:", program_name);
573
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272 }
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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diff changeset
273
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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parents: 572
diff changeset
274 if (file_name != NULL)
3446
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diff changeset
275 {
4500
cdb224406ea7 [!USE_IN_LIBIO]: Omit this case; assume USE_IN_LIBIO is 1.
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parents: 4072
diff changeset
276 #if _LIBC
3446
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diff changeset
277 if (_IO_fwide (stderr, 0) > 0)
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
278 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
849a40d65bee Update from GNU libc.
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279 else
849a40d65bee Update from GNU libc.
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diff changeset
280 #endif
849a40d65bee Update from GNU libc.
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diff changeset
281 fprintf (stderr, "%s:%d: ", file_name, line_number);
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
282 }
573
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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283
4636
8b869710f671 Remove K&R cruft.
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parents: 4500
diff changeset
284 va_start (args, message);
3446
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diff changeset
285 error_tail (status, errnum, message, args);
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
286
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
287 #ifdef _LIBC
849a40d65bee Update from GNU libc.
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diff changeset
288 _IO_funlockfile (stderr);
849a40d65bee Update from GNU libc.
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parents: 2984
diff changeset
289 #endif
573
8a90f3b04017 update from FSF:/home/gd/gnu/lib
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290 }
1268
a6946b537568 update from fsf
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parents: 882
diff changeset
291
a6946b537568 update from fsf
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parents: 882
diff changeset
292 #ifdef _LIBC
a6946b537568 update from fsf
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293 /* Make the weak alias. */
1289
8b40e286a0bd new version from Uli
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diff changeset
294 # undef error
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295 # undef error_at_line
1268
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296 weak_alias (__error, error)
a6946b537568 update from fsf
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297 weak_alias (__error_at_line, error_at_line)
a6946b537568 update from fsf
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298 #endif