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annotate lib/error.c @ 17718:cc408fc7021c

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Sync up error.c with glibc This is a partial sync-up of error.c with glibc. The following changes went in: - Get rid of the INTUSE macro - Remove unused macro ALLOCA_LIMIT - Fix a potential buffer overflow in error_tail (sourceware bz #15672) - Fix a potential NULL dereference in strcmp error: Sync from glibc master * lib/error.c [_LIBC]: Remove INTUSE usage. (error_tail): Remove unused macro ALLOCA_LIMIT. Fix potential buffer overflow. Fix potential NULL dereference in strcmp.
author Siddhesh Poyarekar <siddhesh@redhat.com>
date Wed, 09 Jul 2014 15:26:17 +0530
parents 344018b6e5d7
children 41c703805963
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1 /* Error handler for noninteractive utilities
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2 Copyright (C) 1990-1998, 2000-2007, 2009-2014 Free Software Foundation, Inc.
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3 This file is part of the GNU C Library.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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19
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20 #if !_LIBC
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21 # include <config.h>
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22 #endif
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23
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24 #include "error.h"
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25
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26 #include <stdarg.h>
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27 #include <stdio.h>
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28 #include <stdlib.h>
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29 #include <string.h>
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30
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31 #if !_LIBC && ENABLE_NLS
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32 # include "gettext.h"
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33 # define _(msgid) gettext (msgid)
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34 #endif
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35
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36 #ifdef _LIBC
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37 # include <libintl.h>
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38 # include <stdbool.h>
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39 # include <stdint.h>
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40 # include <wchar.h>
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41 # define mbsrtowcs __mbsrtowcs
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42 #endif
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43
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44 #if USE_UNLOCKED_IO
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45 # include "unlocked-io.h"
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46 #endif
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48 #ifndef _
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49 # define _(String) String
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50 #endif
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51
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52 /* If NULL, error will flush stdout, then print on stderr the program
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53 name, a colon and a space. Otherwise, error will call this
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54 function without parameters instead. */
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55 void (*error_print_progname) (void);
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56
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57 /* This variable is incremented each time 'error' is called. */
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58 unsigned int error_message_count;
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59
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60 #ifdef _LIBC
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61 /* In the GNU C library, there is a predefined variable for this. */
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62
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63 # define program_name program_invocation_name
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64 # include <errno.h>
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65 # include <limits.h>
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66 # include <libio/libioP.h>
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67
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68 /* In GNU libc we want do not want to use the common name 'error' directly.
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69 Instead make it a weak alias. */
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70 extern void __error (int status, int errnum, const char *message, ...)
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71 __attribute__ ((__format__ (__printf__, 3, 4)));
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72 extern void __error_at_line (int status, int errnum, const char *file_name,
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73 unsigned int line_number, const char *message,
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74 ...)
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75 __attribute__ ((__format__ (__printf__, 5, 6)));;
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76 # define error __error
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77 # define error_at_line __error_at_line
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78
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79 # include <libio/iolibio.h>
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80 # define fflush(s) _IO_fflush (s)
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81 # undef putc
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82 # define putc(c, fp) _IO_putc (c, fp)
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84 # include <bits/libc-lock.h>
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85
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86 #else /* not _LIBC */
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87
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88 # include <fcntl.h>
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89 # include <unistd.h>
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90
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91 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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92 /* Get declarations of the native Windows API functions. */
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93 # define WIN32_LEAN_AND_MEAN
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94 # include <windows.h>
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95 /* Get _get_osfhandle. */
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96 # include "msvc-nothrow.h"
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97 # endif
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98
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99 /* The gnulib override of fcntl is not needed in this file. */
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100 # undef fcntl
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101
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102 # if !HAVE_DECL_STRERROR_R
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103 # ifndef HAVE_DECL_STRERROR_R
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104 "this configure-time declaration test was not run"
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105 # endif
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106 # if STRERROR_R_CHAR_P
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107 char *strerror_r ();
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108 # else
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109 int strerror_r ();
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110 # endif
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111 # endif
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112
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113 /* The calling program should define program_name and set it to the
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114 name of the executing program. */
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115 extern char *program_name;
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116
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117 # if HAVE_STRERROR_R || defined strerror_r
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118 # define __strerror_r strerror_r
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119 # endif /* HAVE_STRERROR_R || defined strerror_r */
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120 #endif /* not _LIBC */
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121
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122 #if !_LIBC
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123 /* Return non-zero if FD is open. */
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124 static int
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125 is_open (int fd)
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126 {
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127 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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128 /* On native Windows: The initial state of unassigned standard file
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129 descriptors is that they are open but point to an INVALID_HANDLE_VALUE.
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130 There is no fcntl, and the gnulib replacement fcntl does not support
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131 F_GETFL. */
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132 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
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133 # else
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134 # ifndef F_GETFL
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135 # error Please port fcntl to your platform
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136 # endif
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137 return 0 <= fcntl (fd, F_GETFL);
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
138 # endif
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
139 }
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
140 #endif
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
141
17186
84256646069c error, filevercmp: no 'static inline'
Paul Eggert <eggert@cs.ucla.edu>
parents: 16235
diff changeset
142 static void
12337
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
143 flush_stdout (void)
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
144 {
13324
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
145 #if !_LIBC
12337
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
146 int stdout_fd;
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
147
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
148 # if GNULIB_FREOPEN_SAFER
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
149 /* Use of gnulib's freopen-safer module normally ensures that
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
150 fileno (stdout) == 1
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
151 whenever stdout is open. */
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
152 stdout_fd = STDOUT_FILENO;
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
153 # else
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
154 /* POSIX states that fileno (stdout) after fclose is unspecified. But in
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
155 practice it is not a problem, because stdout is statically allocated and
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
156 the fd of a FILE stream is stored as a field in its allocated memory. */
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
157 stdout_fd = fileno (stdout);
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
158 # endif
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
159 /* POSIX states that fflush (stdout) after fclose is unspecified; it
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
160 is safe in glibc, but not on all other platforms. fflush (NULL)
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
161 is always defined, but too draconian. */
13324
2792eeac632f error: More reliable output on mingw.
Bruno Haible <bruno@clisp.org>
parents: 12559
diff changeset
162 if (0 <= stdout_fd && is_open (stdout_fd))
12337
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
163 #endif
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
164 fflush (stdout);
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
165 }
9d131fdf3903 error: account for the possibility of freopen (stdout).
Bruno Haible <bruno@clisp.org>
parents: 11714
diff changeset
166
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
167 static void
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
168 print_errno_message (int errnum)
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
169 {
7232
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
170 char const *s;
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
171
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
172 #if defined HAVE_STRERROR_R || _LIBC
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
173 char errbuf[1024];
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
174 # if STRERROR_R_CHAR_P || _LIBC
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
175 s = __strerror_r (errnum, errbuf, sizeof errbuf);
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
176 # else
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
177 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
178 s = errbuf;
7232
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
179 else
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
180 s = 0;
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
181 # endif
7232
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
182 #else
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
183 s = strerror (errnum);
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
184 #endif
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
185
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
186 #if !_LIBC
7232
b307709e3a05 * error.c (error_at_line, print_errno_message): Match libc, after
Eric Blake <ebb9@byu.net>
parents: 7131
diff changeset
187 if (! s)
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
188 s = _("Unknown system error");
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
189 #endif
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
190
4500
cdb224406ea7 [!USE_IN_LIBIO]: Omit this case; assume USE_IN_LIBIO is 1.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4072
diff changeset
191 #if _LIBC
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
192 __fxprintf (NULL, ": %s", s);
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
193 #else
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
194 fprintf (stderr, ": %s", s);
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
195 #endif
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
196 }
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
197
17531
e4bb7b0088bb error: add the printf attribute to a static function
Jim Meyering <meyering@fb.com>
parents: 17249
diff changeset
198 static void _GL_ATTRIBUTE_FORMAT_PRINTF (3, 0) _GL_ARG_NONNULL ((3))
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
199 error_tail (int status, int errnum, const char *message, va_list args)
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
200 {
4695
4cd5b2420ecf Assume vprintf.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4680
diff changeset
201 #if _LIBC
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
202 if (_IO_fwide (stderr, 0) > 0)
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
203 {
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
204 size_t len = strlen (message) + 1;
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
205 wchar_t *wmessage = NULL;
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
206 mbstate_t st;
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
207 size_t res;
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
208 const char *tmp;
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
209 bool use_malloc = false;
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
210
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
211 while (1)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
212 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
213 if (__libc_use_alloca (len * sizeof (wchar_t)))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
214 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
215 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
216 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
217 if (!use_malloc)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
218 wmessage = NULL;
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
219
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
220 wchar_t *p = (wchar_t *) realloc (wmessage,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
221 len * sizeof (wchar_t));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
222 if (p == NULL)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
223 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
224 free (wmessage);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
225 fputws_unlocked (L"out of memory\n", stderr);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
226 return;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
227 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
228 wmessage = p;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
229 use_malloc = true;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
230 }
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
231
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
232 memset (&st, '\0', sizeof (st));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
233 tmp = message;
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
234
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
235 res = mbsrtowcs (wmessage, &tmp, len, &st);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
236 if (res != len)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
237 break;
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
238
17718
cc408fc7021c Sync up error.c with glibc
Siddhesh Poyarekar <siddhesh@redhat.com>
parents: 17587
diff changeset
239 if (__builtin_expect (len >= SIZE_MAX / sizeof (wchar_t) / 2, 0))
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
240 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
241 /* This really should not happen if everything is fine. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
242 res = (size_t) -1;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
243 break;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
244 }
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
245
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
246 len *= 2;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
247 }
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
248
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
249 if (res == (size_t) -1)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
250 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
251 /* The string cannot be converted. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
252 if (use_malloc)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
253 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
254 free (wmessage);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
255 use_malloc = false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
256 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
257 wmessage = (wchar_t *) L"???";
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
258 }
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
259
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
260 __vfwprintf (stderr, wmessage, args);
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
261
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
262 if (use_malloc)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12338
diff changeset
263 free (wmessage);
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
264 }
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
265 else
4695
4cd5b2420ecf Assume vprintf.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4680
diff changeset
266 #endif
3446
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
267 vfprintf (stderr, message, args);
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
268 va_end (args);
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
269
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
270 ++error_message_count;
849a40d65bee Update from GNU libc.
Jim Meyering <jim@meyering.net>
parents: 2984
diff changeset
271 if (errnum)
3550
c18604dda2d7 (strerror_r): Do not declare unless !_LIBC.
Jim Meyering <jim@meyering.net>
parents: 3446
diff changeset
272 print_errno_message (errnum);
4680
0ec32cb1202f Correct indentation of cpp directives.
Jim Meyering <jim@meyering.net>
parents: 4636
diff changeset
273 #if _LIBC
7088
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
274 __fxprintf (NULL, "\n");
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
275 #else
e3cb6c0685d8 * error.h: Fold in some upstream changes from glibc.
Eric Blake <ebb9@byu.net>
parents: 5848
diff changeset
276 putc ('\n', stderr);
4680
0ec32cb1202f Correct indentation of cpp directives.
Jim Meyering <jim@meyering.net>
parents: 4636
diff changeset
277 #endif
3446
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278 fflush (stderr);
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279 if (status)
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280 exit (status);
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281 }
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282
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283
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284 /* Print the program name and error message MESSAGE, which is a printf-style
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285 format string with optional args.
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286 If ERRNUM is nonzero, print its corresponding system error message.
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287 Exit with status STATUS if it is nonzero. */
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288 void
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289 error (int status, int errnum, const char *message, ...)
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290 {
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291 va_list args;
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292
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293 #if defined _LIBC && defined __libc_ptf_call
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294 /* We do not want this call to be cut short by a thread
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295 cancellation. Therefore disable cancellation for now. */
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296 int state = PTHREAD_CANCEL_ENABLE;
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297 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
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298 0);
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299 #endif
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300
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301 flush_stdout ();
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302 #ifdef _LIBC
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303 _IO_flockfile (stderr);
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304 #endif
398
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305 if (error_print_progname)
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306 (*error_print_progname) ();
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307 else
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308 {
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309 #if _LIBC
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310 __fxprintf (NULL, "%s: ", program_name);
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311 #else
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312 fprintf (stderr, "%s: ", program_name);
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313 #endif
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314 }
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315
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316 va_start (args, message);
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317 error_tail (status, errnum, message, args);
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318
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319 #ifdef _LIBC
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320 _IO_funlockfile (stderr);
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321 # ifdef __libc_ptf_call
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322 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
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323 # endif
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324 #endif
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325 }
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326
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327 /* Sometimes we want to have at most one error per line. This
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328 variable controls whether this mode is selected or not. */
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329 int error_one_per_line;
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330
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331 void
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332 error_at_line (int status, int errnum, const char *file_name,
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333 unsigned int line_number, const char *message, ...)
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334 {
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335 va_list args;
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336
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337 if (error_one_per_line)
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338 {
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339 static const char *old_file_name;
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340 static unsigned int old_line_number;
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341
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342 if (old_line_number == line_number
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343 && (file_name == old_file_name
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344 || (old_file_name != NULL
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345 && file_name != NULL
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346 && strcmp (old_file_name, file_name) == 0)))
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347
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348 /* Simply return and print nothing. */
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349 return;
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350
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351 old_file_name = file_name;
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352 old_line_number = line_number;
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353 }
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354
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355 #if defined _LIBC && defined __libc_ptf_call
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356 /* We do not want this call to be cut short by a thread
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357 cancellation. Therefore disable cancellation for now. */
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358 int state = PTHREAD_CANCEL_ENABLE;
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359 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
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360 0);
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361 #endif
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362
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363 flush_stdout ();
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364 #ifdef _LIBC
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365 _IO_flockfile (stderr);
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366 #endif
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367 if (error_print_progname)
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368 (*error_print_progname) ();
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369 else
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370 {
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371 #if _LIBC
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372 __fxprintf (NULL, "%s:", program_name);
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373 #else
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374 fprintf (stderr, "%s:", program_name);
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375 #endif
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376 }
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377
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378 #if _LIBC
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379 __fxprintf (NULL, file_name != NULL ? "%s:%d: " : " ",
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380 file_name, line_number);
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381 #else
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382 fprintf (stderr, file_name != NULL ? "%s:%d: " : " ",
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383 file_name, line_number);
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384 #endif
573
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385
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386 va_start (args, message);
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387 error_tail (status, errnum, message, args);
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388
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389 #ifdef _LIBC
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390 _IO_funlockfile (stderr);
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391 # ifdef __libc_ptf_call
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392 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
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393 # endif
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394 #endif
573
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395 }
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396
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397 #ifdef _LIBC
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398 /* Make the weak alias. */
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399 # undef error
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400 # undef error_at_line
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401 weak_alias (__error, error)
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402 weak_alias (__error_at_line, error_at_line)
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403 #endif