1 /* va_list error handler for noninteractive utilities 2 Copyright (C) 2006-2007, 2009-2021 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 <https://www.gnu.org/licenses/>. */ 16 17 /* Written by Eric Blake. */ 18 19 #include <config.h> 20 21 /* Specification. */ 22 #include "verror.h" 23 24 #include <errno.h> 25 #include <stdarg.h> 26 #include <stdlib.h> 27 28 #include "error.h" 29 #include "xvasprintf.h" 30 31 #if ENABLE_NLS 32 # include "gettext.h" 33 # define _(msgid) gettext (msgid) 34 #endif 35 36 #ifndef _ 37 # define _(String) String 38 #endif 39 40 /* Print a message with 'vfprintf (stderr, FORMAT, ARGS)'; 41 if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM). 42 If STATUS is nonzero, terminate the program with 'exit (STATUS)'. 43 Use the globals error_print_progname and error_message_count similarly 44 to error(). */ 45 void 46 verror (int status, int errnum, const char *format, va_list args) /* */ 47 { 48 verror_at_line (status, errnum, NULL, 0, format, args); 49 } 50 51 /* Print a message with 'vfprintf (stderr, FORMAT, ARGS)'; 52 if ERRNUM is nonzero, follow it with ": " and strerror (ERRNUM). 53 If STATUS is nonzero, terminate the program with 'exit (STATUS)'. 54 If FNAME is not NULL, prepend the message with "FNAME:LINENO:". 55 Use the globals error_print_progname, error_message_count, and 56 error_one_per_line similarly to error_at_line(). */ 57 void 58 verror_at_line (int status, int errnum, const char *file, /* */ 59 unsigned int line_number, const char *format, va_list args) 60 { 61 char *message = xvasprintf (format, args); 62 if (message) 63 { 64 /* Until https://sourceware.org/bugzilla/show_bug.cgi?id=2997 is fixed, 65 glibc violates GNU Coding Standards when the file argument to 66 error_at_line is NULL. */ 67 if (file) 68 error_at_line (status, errnum, file, line_number, "%s", message); 69 else 70 error (status, errnum, "%s", message); 71 } 72 else 73 { 74 /* EOVERFLOW, EINVAL, and EILSEQ from xvasprintf are signs of 75 serious programmer errors. */ 76 error (0, errno, _("unable to display error message")); 77 abort (); 78 } 79 free (message); 80 }