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1 /* error.c -- error handler for noninteractive utilities
2 Copyright (C) 1990, 91, 92, 93, 94, 95 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
50 /* This variable is incremented each time `error' is called. */
51 unsigned int error_message_count
;
53 /* If NULL, error will flush stdout, then print on stderr the program
54 name, a colon and a space. Otherwise, error will call this
55 function without parameters instead. */
56 void (*error_print_progname
) () = NULL
;
59 #define program_name program_invocation_name
62 /* The calling program should define program_name and set it to the
63 name of the executing program. */
64 extern char *program_name
;
66 #if HAVE_STRERROR || _LIBC
67 # ifndef strerror /* On some systems, strerror is a macro */
72 private_strerror (errnum
)
75 extern char *sys_errlist
[];
78 if (errnum
> 0 && errnum
<= sys_nerr
)
79 return sys_errlist
[errnum
];
80 return "Unknown system error";
82 #define strerror private_strerror
85 /* Print the program name and error message MESSAGE, which is a printf-style
86 format string with optional args.
87 If ERRNUM is nonzero, print its corresponding system error message.
88 Exit with status STATUS if it is nonzero. */
92 #if defined(VA_START) && __STDC__
93 error (int status
, int errnum
, const char *message
, ...)
95 error (status
, errnum
, message
, va_alist
)
106 if (error_print_progname
)
107 (*error_print_progname
) ();
111 fprintf (stderr
, "%s: ", program_name
);
115 VA_START (args
, message
);
116 # if HAVE_VPRINTF || _LIBC
117 vfprintf (stderr
, message
, args
);
119 _doprnt (message
, args
, stderr
);
123 fprintf (stderr
, message
, a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
);
126 ++error_message_count
;
129 fprintf (stderr
, ": %s", strerror (errnum
));
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