glibc version.

lib/error.c

@@ -0,0 +1,368 @@
+/* Error handler for noninteractive utilities
+   Copyright (C) 1990-1998, 2000, 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.  Its master source is NOT part of
+   the C library, however.  The master source lives in /gd/gnu/lib.
+
+   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.  */
+
+/* Written by David MacKenzie <[email protected]>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <libintl.h>
+#ifdef _LIBC
+# include <wchar.h>
+# define mbsrtowcs __mbsrtowcs
+#endif
+
+#if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
+# if __STDC__
+#  include <stdarg.h>
+#  define VA_START(args, lastarg) va_start(args, lastarg)
+# else
+#  include <varargs.h>
+#  define VA_START(args, lastarg) va_start(args)
+# endif
+#else
+# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
+# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
+#endif
+
+#if STDC_HEADERS || _LIBC
+# include <stdlib.h>
+# include <string.h>
+#else
+void exit ();
+#endif
+
+#include "error.h"
+
+#ifndef _
+# define _(String) String
+#endif
+
+/* If NULL, error will flush stdout, then print on stderr the program
+   name, a colon and a space.  Otherwise, error will call this
+   function without parameters instead.  */
+void (*error_print_progname) (
+#if __STDC__ - 0
+			      void
+#endif
+			      );
+
+/* This variable is incremented each time `error' is called.  */
+unsigned int error_message_count;
+
+#ifdef _LIBC
+/* In the GNU C library, there is a predefined variable for this.  */
+
+# define program_name program_invocation_name
+# include <errno.h>
+
+/* 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,
+			     ...)
+     __attribute__ ((__format__ (__printf__, 5, 6)));;
+# define error __error
+# define error_at_line __error_at_line
+
+# ifdef USE_IN_LIBIO
+# include <libio/iolibio.h>
+#  define fflush(s) _IO_fflush (s)
+# endif
+
+#else /* not _LIBC */
+
+/* The calling program should define program_name and set it to the
+   name of the executing program.  */
+extern char *program_name;
+
+# ifdef HAVE_STRERROR_R
+#  define __strerror_r strerror_r
+# else
+#  if HAVE_STRERROR
+#   ifndef strerror		/* On some systems, strerror is a macro */
+char *strerror ();
+#   endif
+#  else
+static char *
+private_strerror (errnum)
+     int errnum;
+{
+  extern char *sys_errlist[];
+  extern int sys_nerr;
+
+  if (errnum > 0 && errnum <= sys_nerr)
+    return _(sys_errlist[errnum]);
+  return _("Unknown system error");
+}
+#   define strerror private_strerror
+#  endif /* HAVE_STRERROR */
+# endif	/* HAVE_STRERROR_R */
+#endif	/* not _LIBC */
+
+
+#ifdef VA_START
+static void
+error_tail (int status, int errnum, const char *message, va_list args)
+{
+# if HAVE_VPRINTF || _LIBC
+#  if _LIBC && USE_IN_LIBIO
+  if (_IO_fwide (stderr, 0) > 0)
+    {
+#   define ALLOCA_LIMIT	2000
+      size_t len = strlen (message) + 1;
+      wchar_t *wmessage = NULL;
+      mbstate_t st;
+      size_t res;
+      const char *tmp;
+
+      do
+	{
+	  if (len < ALLOCA_LIMIT)
+	    wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
+	  else
+	    {
+	      if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
+		wmessage = NULL;
+
+	      wmessage = (wchar_t *) realloc (wmessage,
+					      len * sizeof (wchar_t));
+
+	      if (wmessage == NULL)
+		{
+		  fputws_unlocked (L"out of memory\n", stderr);
+		  return;
+		}
+	    }
+
+	  memset (&st, '\0', sizeof (st));
+	  tmp =message;
+	}
+      while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
+
+      if (res == (size_t) -1)
+	/* The string cannot be converted.  */
+	wmessage = (wchar_t *) L"???";
+
+      __vfwprintf (stderr, wmessage, args);
+    }
+  else
+#  endif
+    vfprintf (stderr, message, args);
+# else
+  _doprnt (message, args, stderr);
+# endif
+  va_end (args);
+
+  ++error_message_count;
+  if (errnum)
+    {
+#if defined HAVE_STRERROR_R || _LIBC
+      char errbuf[1024];
+      char *s = __strerror_r (errnum, errbuf, sizeof errbuf);
+# if _LIBC && USE_IN_LIBIO
+      if (_IO_fwide (stderr, 0) > 0)
+	__fwprintf (stderr, L": %s", s);
+      else
+# endif
+	fprintf (stderr, ": %s", s);
+#else
+      fprintf (stderr, ": %s", strerror (errnum));
+#endif
+    }
+#if _LIBC && USE_IN_LIBIO
+  if (_IO_fwide (stderr, 0) > 0)
+    putwc (L'\n', stderr);
+  else
+#endif
+    putc ('\n', stderr);
+  fflush (stderr);
+  if (status)
+    exit (status);
+}
+#endif
+
+
+/* Print the program name and error message MESSAGE, which is a printf-style
+   format string with optional args.
+   If ERRNUM is nonzero, print its corresponding system error message.
+   Exit with status STATUS if it is nonzero.  */
+/* VARARGS */
+void
+#if defined VA_START && __STDC__
+error (int status, int errnum, const char *message, ...)
+#else
+error (status, errnum, message, va_alist)
+     int status;
+     int errnum;
+     char *message;
+     va_dcl
+#endif
+{
+#ifdef VA_START
+  va_list args;
+#endif
+
+  fflush (stdout);
+#ifdef _LIBC
+# ifdef USE_IN_LIBIO
+  _IO_flockfile (stderr);
+# else
+  __flockfile (stderr);
+# endif
+#endif
+  if (error_print_progname)
+    (*error_print_progname) ();
+  else
+    {
+#if _LIBC && USE_IN_LIBIO
+      if (_IO_fwide (stderr, 0) > 0)
+	__fwprintf (stderr, L"%s: ", program_name);
+      else
+#endif
+	fprintf (stderr, "%s: ", program_name);
+    }
+
+#ifdef VA_START
+  VA_START (args, message);
+  error_tail (status, errnum, message, args);
+#else
+  fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+
+  ++error_message_count;
+  if (errnum)
+    fprintf (stderr, ": %s", strerror (errnum));
+  putc ('\n', stderr);
+  fflush (stderr);
+  if (status)
+    exit (status);
+#endif
+
+#ifdef _LIBC
+# ifdef USE_IN_LIBIO
+  _IO_funlockfile (stderr);
+# else
+  __funlockfile (stderr);
+# endif
+#endif
+}
+
+/* Sometimes we want to have at most one error per line.  This
+   variable controls whether this mode is selected or not.  */
+int error_one_per_line;
+
+void
+#if defined VA_START && __STDC__
+error_at_line (int status, int errnum, const char *file_name,
+	       unsigned int line_number, const char *message, ...)
+#else
+error_at_line (status, errnum, file_name, line_number, message, va_alist)
+     int status;
+     int errnum;
+     const char *file_name;
+     unsigned int line_number;
+     char *message;
+     va_dcl
+#endif
+{
+#ifdef VA_START
+  va_list args;
+#endif
+
+  if (error_one_per_line)
+    {
+      static const char *old_file_name;
+      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;
+
+      old_file_name = file_name;
+      old_line_number = line_number;
+    }
+
+  fflush (stdout);
+#ifdef _LIBC
+# ifdef USE_IN_LIBIO
+  _IO_flockfile (stderr);
+# else
+  __flockfile (stderr);
+# endif
+#endif
+  if (error_print_progname)
+    (*error_print_progname) ();
+  else
+    {
+#if _LIBC && USE_IN_LIBIO
+      if (_IO_fwide (stderr, 0) > 0)
+	__fwprintf (stderr, L"%s: ", program_name);
+      else
+#endif
+	fprintf (stderr, "%s:", program_name);
+    }
+
+  if (file_name != NULL)
+    {
+#if _LIBC && USE_IN_LIBIO
+      if (_IO_fwide (stderr, 0) > 0)
+	__fwprintf (stderr, L"%s:%d: ", file_name, line_number);
+      else
+#endif
+	fprintf (stderr, "%s:%d: ", file_name, line_number);
+    }
+
+#ifdef VA_START
+  VA_START (args, message);
+  error_tail (status, errnum, message, args);
+#else
+  fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
+
+  ++error_message_count;
+  if (errnum)
+    fprintf (stderr, ": %s", strerror (errnum));
+  putc ('\n', stderr);
+  fflush (stderr);
+  if (status)
+    exit (status);
+#endif
+
+#ifdef _LIBC
+# ifdef USE_IN_LIBIO
+  _IO_funlockfile (stderr);
+# else
+  __funlockfile (stderr);
+# endif
+#endif
+}
+
+#ifdef _LIBC
+/* Make the weak alias.  */
+# undef error
+# undef error_at_line
+weak_alias (__error, error)
+weak_alias (__error_at_line, error_at_line)
+#endif