/* Error handler for noninteractive utilities
- Copyright (C) 1990-1998, 2000-2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1990-1998, 2000-2007, 2009-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-#ifdef HAVE_CONFIG_H
+#if !_LIBC
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
-#ifdef _LIBC
-# include <libintl.h>
-#else
+#if !_LIBC && ENABLE_NLS
# include "gettext.h"
+# define _(msgid) gettext (msgid)
#endif
#ifdef _LIBC
+# include <libintl.h>
+# include <stdbool.h>
+# include <stdint.h>
# include <wchar.h>
# define mbsrtowcs __mbsrtowcs
#endif
-#if !_LIBC
+#if USE_UNLOCKED_IO
# include "unlocked-io.h"
#endif
function without parameters instead. */
void (*error_print_progname) (void);
-/* This variable is incremented each time `error' is called. */
+/* This variable is incremented each time 'error' is called. */
unsigned int error_message_count;
#ifdef _LIBC
# define program_name program_invocation_name
# include <errno.h>
+# include <limits.h>
# include <libio/libioP.h>
-/* In GNU libc we want do not want to use the common name `error' directly.
+/* In GNU libc we want do not want to use the common name 'error' directly.
Instead make it a weak alias. */
extern void __error (int status, int errnum, const char *message, ...)
__attribute__ ((__format__ (__printf__, 3, 4)));
extern void __error_at_line (int status, int errnum, const char *file_name,
- unsigned int line_number, const char *message,
- ...)
+ unsigned int line_number, const char *message,
+ ...)
__attribute__ ((__format__ (__printf__, 5, 6)));;
# define error __error
# define error_at_line __error_at_line
#else /* not _LIBC */
-# if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
+# include <fcntl.h>
+# include <unistd.h>
+
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions. */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle. */
+# include "msvc-nothrow.h"
+# endif
+
+/* The gnulib override of fcntl is not needed in this file. */
+# undef fcntl
+
+# if !HAVE_DECL_STRERROR_R
# ifndef HAVE_DECL_STRERROR_R
"this configure-time declaration test was not run"
# endif
+# if STRERROR_R_CHAR_P
char *strerror_r ();
+# else
+int strerror_r ();
+# endif
# endif
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
/* The calling program should define program_name and set it to the
name of the executing program. */
extern char *program_name;
# if HAVE_STRERROR_R || defined strerror_r
# define __strerror_r strerror_r
+# endif /* HAVE_STRERROR_R || defined strerror_r */
+#endif /* not _LIBC */
+
+#if !_LIBC
+/* Return non-zero if FD is open. */
+static int
+is_open (int fd)
+{
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+ /* On native Windows: The initial state of unassigned standard file
+ descriptors is that they are open but point to an INVALID_HANDLE_VALUE.
+ There is no fcntl, and the gnulib replacement fcntl does not support
+ F_GETFL. */
+ return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+# else
+# ifndef F_GETFL
+# error Please port fcntl to your platform
+# endif
+ return 0 <= fcntl (fd, F_GETFL);
+# endif
+}
+#endif
+
+static void
+flush_stdout (void)
+{
+#if !_LIBC
+ int stdout_fd;
+
+# if GNULIB_FREOPEN_SAFER
+ /* Use of gnulib's freopen-safer module normally ensures that
+ fileno (stdout) == 1
+ whenever stdout is open. */
+ stdout_fd = STDOUT_FILENO;
+# else
+ /* POSIX states that fileno (stdout) after fclose is unspecified. But in
+ practice it is not a problem, because stdout is statically allocated and
+ the fd of a FILE stream is stored as a field in its allocated memory. */
+ stdout_fd = fileno (stdout);
# endif
-#endif /* not _LIBC */
+ /* POSIX states that fflush (stdout) after fclose is unspecified; it
+ is safe in glibc, but not on all other platforms. fflush (NULL)
+ is always defined, but too draconian. */
+ if (0 <= stdout_fd && is_open (stdout_fd))
+#endif
+ fflush (stdout);
+}
static void
print_errno_message (int errnum)
#endif
#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- {
- __fwprintf (stderr, L": %s", s);
- return;
- }
-#endif
-
+ __fxprintf (NULL, ": %s", s);
+#else
fprintf (stderr, ": %s", s);
+#endif
}
-static void
+static void _GL_ATTRIBUTE_FORMAT_PRINTF (3, 0) _GL_ARG_NONNULL ((3))
error_tail (int status, int errnum, const char *message, va_list args)
{
#if _LIBC
{
# define ALLOCA_LIMIT 2000
size_t len = strlen (message) + 1;
- const wchar_t *wmessage = L"out of memory";
- wchar_t *wbuf = (len < ALLOCA_LIMIT
- ? (void *) alloca (len * sizeof *wbuf)
- : len <= SIZE_MAX / sizeof *wbuf
- ? malloc (len * sizeof *wbuf)
- : NULL);
-
- if (wbuf)
- {
- size_t res;
- mbstate_t st;
- const char *tmp = message;
- memset (&st, '\0', sizeof (st));
- res = mbsrtowcs (wbuf, &tmp, len, &st);
- wmessage = res == (size_t) -1 ? L"???" : wbuf;
- }
+ wchar_t *wmessage = NULL;
+ mbstate_t st;
+ size_t res;
+ const char *tmp;
+ bool use_malloc = false;
+
+ while (1)
+ {
+ if (__libc_use_alloca (len * sizeof (wchar_t)))
+ wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
+ else
+ {
+ if (!use_malloc)
+ wmessage = NULL;
+
+ wchar_t *p = (wchar_t *) realloc (wmessage,
+ len * sizeof (wchar_t));
+ if (p == NULL)
+ {
+ free (wmessage);
+ fputws_unlocked (L"out of memory\n", stderr);
+ return;
+ }
+ wmessage = p;
+ use_malloc = true;
+ }
+
+ memset (&st, '\0', sizeof (st));
+ tmp = message;
+
+ res = mbsrtowcs (wmessage, &tmp, len, &st);
+ if (res != len)
+ break;
+
+ if (__builtin_expect (len >= SIZE_MAX / 2, 0))
+ {
+ /* This really should not happen if everything is fine. */
+ res = (size_t) -1;
+ break;
+ }
+
+ len *= 2;
+ }
+
+ if (res == (size_t) -1)
+ {
+ /* The string cannot be converted. */
+ if (use_malloc)
+ {
+ free (wmessage);
+ use_malloc = false;
+ }
+ wmessage = (wchar_t *) L"???";
+ }
__vfwprintf (stderr, wmessage, args);
- if (! (len < ALLOCA_LIMIT))
- free (wbuf);
+
+ if (use_malloc)
+ free (wmessage);
}
else
#endif
if (errnum)
print_errno_message (errnum);
#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- putwc (L'\n', stderr);
- else
+ __fxprintf (NULL, "\n");
+#else
+ putc ('\n', stderr);
#endif
- putc ('\n', stderr);
fflush (stderr);
if (status)
exit (status);
cancellation. Therefore disable cancellation for now. */
int state = PTHREAD_CANCEL_ENABLE;
__libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
- 0);
+ 0);
#endif
- fflush (stdout);
+ flush_stdout ();
#ifdef _LIBC
_IO_flockfile (stderr);
#endif
else
{
#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s: ", program_name);
- else
+ __fxprintf (NULL, "%s: ", program_name);
+#else
+ fprintf (stderr, "%s: ", program_name);
#endif
- fprintf (stderr, "%s: ", program_name);
}
va_start (args, message);
void
error_at_line (int status, int errnum, const char *file_name,
- unsigned int line_number, const char *message, ...)
+ unsigned int line_number, const char *message, ...)
{
va_list args;
static unsigned int old_line_number;
if (old_line_number == line_number
- && (file_name == old_file_name
- || strcmp (old_file_name, file_name) == 0))
- /* Simply return and print nothing. */
- return;
+ && (file_name == old_file_name
+ || strcmp (old_file_name, file_name) == 0))
+ /* Simply return and print nothing. */
+ return;
old_file_name = file_name;
old_line_number = line_number;
cancellation. Therefore disable cancellation for now. */
int state = PTHREAD_CANCEL_ENABLE;
__libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
- 0);
+ 0);
#endif
- fflush (stdout);
+ flush_stdout ();
#ifdef _LIBC
_IO_flockfile (stderr);
#endif
else
{
#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s: ", program_name);
- else
+ __fxprintf (NULL, "%s:", program_name);
+#else
+ fprintf (stderr, "%s:", program_name);
#endif
- fprintf (stderr, "%s:", program_name);
}
- if (file_name != NULL)
- {
#if _LIBC
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
- else
+ __fxprintf (NULL, file_name != NULL ? "%s:%d: " : " ",
+ file_name, line_number);
+#else
+ fprintf (stderr, file_name != NULL ? "%s:%d: " : " ",
+ file_name, line_number);
#endif
- fprintf (stderr, "%s:%d: ", file_name, line_number);
- }
va_start (args, message);
error_tail (status, errnum, message, args);
projects / gnulib.git / blobdiff