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/* va_list error handler for noninteractive utilities
Copyright (C) 2006-2007, 2009-2022 Free Software Foundation, Inc.
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 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, see <https://www.gnu.org/licenses/>. */
/* Written by Eric Blake. */
#include <config.h>
/* Specification. */
#include "verror.h"
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include "error.h"
#include "xvasprintf.h"
#if ENABLE_NLS
# include "gettext.h"
# define _(msgid) gettext (msgid)
#endif
#ifndef _
# define _(String) String
#endif
/* Print a message with 'vfprintf (stderr, FORMAT, ARGS)';
if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM).
If STATUS is nonzero, terminate the program with 'exit (STATUS)'.
Use the globals error_print_progname and error_message_count similarly
to error(). */
void
verror (int status, int errnum, const char *format, va_list args)
{
verror_at_line (status, errnum, NULL, 0, format, args);
}
/* Print a message with 'vfprintf (stderr, FORMAT, ARGS)';
if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM).
If STATUS is nonzero, terminate the program with 'exit (STATUS)'.
If FNAME is not NULL, prepend the message with "FNAME:LINENO:".
Use the globals error_print_progname, error_message_count, and
error_one_per_line similarly to error_at_line(). */
void
verror_at_line (int status, int errnum, const char *file,
unsigned int line_number, const char *format, va_list args)
{
char *message = xvasprintf (format, args);
if (message)
{
/* Until https://sourceware.org/bugzilla/show_bug.cgi?id=2997 is fixed,
glibc violates GNU Coding Standards when the file argument to
error_at_line is NULL. */
if (file)
error_at_line (status, errnum, file, line_number, "%s", message);
else
error (status, errnum, "%s", message);
}
else
{
/* EOVERFLOW, EINVAL, and EILSEQ from xvasprintf are signs of
serious programmer errors. */
error (0, errno, _("unable to display error message"));
abort ();
}
free (message);
}
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