about summary refs log tree commit diff
path: root/misc/err.c
blob: 4c372032fa77b0f94ce6096776a59e3cd683aa55 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/* 4.4BSD utility functions for error messages.
   Copyright (C) 1995, 1996, 1998, 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <stdarg.h>
#include <err.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>

#ifdef USE_IN_LIBIO
# include <wchar.h>
# define flockfile(s) _IO_flockfile (s)
# define funlockfile(s) _IO_funlockfile (s)
#endif

extern char *__progname;

#define VA(call)							      \
{									      \
  va_list ap;								      \
  va_start (ap, format);						      \
  call;									      \
  va_end (ap);								      \
}

#ifdef USE_IN_LIBIO
static void
convert_and_print (const char *format, __gnuc_va_list ap)
{
# define ALLOCA_LIMIT	2000
  size_t len;
  wchar_t *wformat = NULL;
  mbstate_t st;
  size_t res;
  const char *tmp;

  if (format == NULL)
    return;

  len = strlen (format) + 1;

  do
    {
      if (len < ALLOCA_LIMIT)
	wformat = (wchar_t *) alloca (len * sizeof (wchar_t));
      else
	{
	  if (wformat != NULL && len / 2 < ALLOCA_LIMIT)
	    wformat = NULL;

	  wformat = (wchar_t *) realloc (wformat, len * sizeof (wchar_t));

	  if (wformat == NULL)
	    {
	      fputws (L"out of memory\n", stderr);
	      return;
	    }
	}

      memset (&st, '\0', sizeof (st));
      tmp =format;
    }
  while ((res = __mbsrtowcs (wformat, &tmp, len, &st)) == len);

  if (res == (size_t) -1)
    /* The string cannot be converted.  */
    wformat = (wchar_t *) L"???";

  __vfwprintf (stderr, wformat, ap);
}
#endif

void
vwarnx (const char *format, __gnuc_va_list ap)
{
  flockfile (stderr);
#ifdef USE_IN_LIBIO
  if (_IO_fwide (stderr, 0) > 0)
    {
      __fwprintf (stderr, L"%s: ", __progname);
      convert_and_print (format, ap);
      putwc_unlocked (L'\n', stderr);
    }
  else
#endif
    {
      fprintf (stderr, "%s: ", __progname);
      if (format)
	vfprintf (stderr, format, ap);
      putc_unlocked ('\n', stderr);
    }
  funlockfile (stderr);
}

void
vwarn (const char *format, __gnuc_va_list ap)
{
  int error = errno;

  flockfile (stderr);
#ifdef USE_IN_LIBIO
  if (_IO_fwide (stderr, 0) > 0)
    {
      __fwprintf (stderr, L"%s: ", __progname);
      if (format)
	{
	  convert_and_print (format, ap);
	  fputws_unlocked (L": ", stderr);
	}
      __set_errno (error);
      __fwprintf (stderr, L"%m\n");
    }
  else
#endif
    {
      fprintf (stderr, "%s: ", __progname);
      if (format)
	{
	  vfprintf (stderr, format, ap);
	  fputs_unlocked (": ", stderr);
	}
      __set_errno (error);
      fprintf (stderr, "%m\n");
    }
  funlockfile (stderr);
}


void
warn (const char *format, ...)
{
  VA (vwarn (format, ap))
}

void
warnx (const char *format, ...)
{
  VA (vwarnx (format, ap))
}

void
verr (int status, const char *format, __gnuc_va_list ap)
{
  vwarn (format, ap);
  exit (status);
}

void
verrx (int status, const char *format, __gnuc_va_list ap)
{
  vwarnx (format, ap);
  exit (status);
}

void
err (int status, const char *format, ...)
{
  VA (verr (status, format, ap))
}

void
errx (int status, const char *format, ...)
{
  VA (verrx (status, format, ap))
}