118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
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/* Error handler for noninteractive utilities
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Copyright (C) 1990-1998, 2000-2005, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "error.h"
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/* This variable is incremented each time `error' is called. */
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unsigned int error_message_count;
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char *strerror_r ();
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/* The calling program should define program_name and set it to the
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name of the executing program. */
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//extern char *program_name;
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static void
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print_errno_message (int errnum)
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{
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char const *s;
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s = strerror (errnum);
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fprintf (stderr, ": %s", s);
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}
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static void
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error_tail (int status, int errnum, const char *message, va_list args)
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{
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vfprintf (stderr, message, args);
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va_end (args);
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++error_message_count;
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if (errnum)
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print_errno_message (errnum);
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putc ('\n', stderr);
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fflush (stderr);
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if (status)
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exit (status);
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}
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/* Print the program name and error message MESSAGE, which is a printf-style
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format string with optional args.
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If ERRNUM is nonzero, print its corresponding system error message.
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Exit with status STATUS if it is nonzero. */
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void
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error (int status, int errnum, const char *message, ...)
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{
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va_list args;
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// fflush (stdout);
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// fprintf (stderr, "%s: ", program_name);
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va_start (args, message);
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error_tail (status, errnum, message, args);
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};
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/* Sometimes we want to have at most one error per line. This
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variable controls whether this mode is selected or not. */
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int error_one_per_line;
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void
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error_at_line (int status, int errnum, const char *file_name,
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unsigned int line_number, const char *message, ...)
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{
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va_list args;
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if (error_one_per_line)
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{
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static const char *old_file_name;
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static unsigned int old_line_number;
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if (old_line_number == line_number
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&& (file_name == old_file_name
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|| strcmp (old_file_name, file_name) == 0))
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/* Simply return and print nothing. */
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return;
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old_file_name = file_name;
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old_line_number = line_number;
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}
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// fflush (stdout);
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fprintf (stderr, file_name != NULL ? "%s:%d: " : " ",
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file_name, line_number);
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va_start (args, message);
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error_tail (status, errnum, message, args);
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}
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