1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-1998, 2000-2004, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
20 /* Adjusted slightly by Erik Andersen <andersen@uclibc.org> */
21
22 #include <stdio.h>
23 #include <stdarg.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <error.h>
27
28
29 /* This variable is incremented each time `error' is called. */
30 unsigned int error_message_count = 0;
31 /* Sometimes we want to have at most one error per line. This
32 variable controls whether this mode is selected or not. */
33 int error_one_per_line;
34 /* If NULL, error will flush stdout, then print on stderr the program
35 name, a colon and a space. Otherwise, error will call this
36 function without parameters instead. */
37 void (*error_print_progname) (void) = NULL;
38
error(int status,int errnum,const char * message,...)39 void error (int status, int errnum, const char *message, ...)
40 {
41 va_list args;
42
43 fflush (stdout);
44
45 if (error_print_progname)
46 (*error_print_progname) ();
47 else
48 fprintf (stderr, "%s: ", __uclibc_progname);
49
50 va_start (args, message);
51 vfprintf (stderr, message, args);
52 va_end (args);
53 ++error_message_count;
54 if (errnum) {
55 fprintf (stderr, ": %s", strerror (errnum));
56 }
57 putc ('\n', stderr);
58 if (status)
59 exit (status);
60 }
61
error_at_line(int status,int errnum,const char * file_name,unsigned int line_number,const char * message,...)62 void error_at_line (int status, int errnum, const char *file_name,
63 unsigned int line_number, const char *message, ...)
64 {
65 va_list args;
66
67 if (error_one_per_line) {
68 static const char *old_file_name;
69 static unsigned int old_line_number;
70
71 if (old_line_number == line_number &&
72 (file_name == old_file_name || !strcmp (old_file_name, file_name)))
73 /* Simply return and print nothing. */
74 return;
75
76 old_file_name = file_name;
77 old_line_number = line_number;
78 }
79
80 fflush (stdout);
81
82 if (error_print_progname)
83 (*error_print_progname) ();
84 else
85 fprintf (stderr, "%s:", __uclibc_progname);
86
87 if (file_name != NULL)
88 fprintf (stderr, "%s:%d: ", file_name, line_number);
89
90 va_start (args, message);
91 vfprintf (stderr, message, args);
92 va_end (args);
93
94 ++error_message_count;
95 if (errnum) {
96 fprintf (stderr, ": %s", strerror (errnum));
97 }
98 putc ('\n', stderr);
99 if (status)
100 exit (status);
101 }
102