1/* va_list error handler for noninteractive utilities 2 Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17/* Written by Eric Blake. */ 18 19#include <config.h> 20 21#include "verror.h" 22#include "xvasprintf.h" 23 24#include <errno.h> 25#include <stdarg.h> 26#include <stdlib.h> 27 28#if ENABLE_NLS 29# include "gettext.h" 30# define _(msgid) gettext (msgid) 31#endif 32 33#ifndef _ 34# define _(String) String 35#endif 36 37/* Print a message with `vfprintf (stderr, FORMAT, ARGS)'; 38 if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM). 39 If STATUS is nonzero, terminate the program with `exit (STATUS)'. 40 Use the globals error_print_progname and error_message_count similarly 41 to error(). */ 42void 43verror (int status, int errnum, const char *format, va_list args) 44{ 45 verror_at_line (status, errnum, NULL, 0, format, args); 46} 47 48/* Print a message with `vfprintf (stderr, FORMAT, ARGS)'; 49 if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM). 50 If STATUS is nonzero, terminate the program with `exit (STATUS)'. 51 If FNAME is not NULL, prepend the message with `FNAME:LINENO:'. 52 Use the globals error_print_progname, error_message_count, and 53 error_one_per_line similarly to error_at_line(). */ 54void 55verror_at_line (int status, int errnum, const char *file, 56 unsigned int line_number, const char *format, va_list args) 57{ 58 char *message = xvasprintf (format, args); 59 if (message) 60 { 61 /* Until http://sourceware.org/bugzilla/show_bug.cgi?id=2997 is fixed, 62 glibc violates GNU Coding Standards when the file argument to 63 error_at_line is NULL. */ 64 if (file) 65 error_at_line (status, errnum, file, line_number, "%s", message); 66 else 67 error (status, errnum, "%s", message); 68 } 69 else 70 { 71 /* EOVERFLOW, EINVAL, and EILSEQ from xvasprintf are signs of 72 serious programmer errors. */ 73 error (0, errno, _("unable to display error message")); 74 abort (); 75 } 76 free (message); 77} 78