1 /* error.c -- error handler for noninteractive utilities
2 Copyright (C) 1990, 91, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
4 This file is part of the GNU C Library. Its master source is NOT part of
5 the C library, however. The master source lives in /gd/gnu/lib.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If
19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
20 Cambridge, MA 02139, USA. */
22 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
30 #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
33 # define VA_START(args, lastarg) va_start(args, lastarg)
36 # define VA_START(args, lastarg) va_start(args)
39 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
40 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
43 #if STDC_HEADERS || _LIBC
51 #define _(String) String
54 /* If NULL, error will flush stdout, then print on stderr the program
55 name, a colon and a space. Otherwise, error will call this
56 function without parameters instead. */
57 void (*error_print_progname) (
63 /* This variable is incremented each time `error' is called. */
64 unsigned int error_message_count;
67 /* In the GNU C library, there is a predefined variable for this. */
69 #define program_name program_invocation_name
74 /* The calling program should define program_name and set it to the
75 name of the executing program. */
76 extern char *program_name;
79 # ifndef strerror /* On some systems, strerror is a macro */
84 private_strerror (errnum)
87 extern char *sys_errlist[];
90 if (errnum > 0 && errnum <= sys_nerr)
91 return sys_errlist[errnum];
92 return _("Unknown system error");
94 #define strerror private_strerror
95 #endif /* HAVE_STRERROR */
98 /* Print the program name and error message MESSAGE, which is a printf-style
99 format string with optional args.
100 If ERRNUM is nonzero, print its corresponding system error message.
101 Exit with status STATUS if it is nonzero. */
105 #if defined(VA_START) && __STDC__
106 error (int status, int errnum, const char *message, ...)
108 error (status, errnum, message, va_alist)
119 if (error_print_progname)
120 (*error_print_progname) ();
124 fprintf (stderr, "%s: ", program_name);
128 VA_START (args, message);
129 # if HAVE_VPRINTF || _LIBC
130 vfprintf (stderr, message, args);
132 _doprnt (message, args, stderr);
136 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
139 ++error_message_count;
141 fprintf (stderr, ": %s", strerror (errnum));