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131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/* error.c -- error handler for noninteractive utilities
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Copyright (C) 1990, 91, 92, 93, 94, 95 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
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# if __STDC__
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# include <stdarg.h>
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# define VA_START(args, lastarg) va_start(args, lastarg)
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# else
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# include <varargs.h>
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# define VA_START(args, lastarg) va_start(args)
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# endif
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#else
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# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
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# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
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#endif
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#if STDC_HEADERS || _LIBC
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# include <stdlib.h>
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# include <string.h>
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#else
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void exit ();
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#endif
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/* This variable is incremented each time `error' is called. */
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unsigned int error_message_count;
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/* If NULL, error will flush stdout, then print on stderr the program
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name, a colon and a space. Otherwise, error will call this
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function without parameters instead. */
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void (*error_print_progname) () = NULL;
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#ifdef _LIBC
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#define program_name program_invocation_name
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#endif
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/* The calling program should define program_name and set it to the
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name of the executing program. */
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extern char *program_name;
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#if HAVE_STRERROR || _LIBC
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# ifndef strerror /* On some systems, strerror is a macro */
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char *strerror ();
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# endif
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#else
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static char *
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private_strerror (errnum)
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int errnum;
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{
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extern char *sys_errlist[];
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extern int sys_nerr;
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if (errnum > 0 && errnum <= sys_nerr)
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return sys_errlist[errnum];
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return "Unknown system error";
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}
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#define strerror private_strerror
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#endif
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/* Print the program name and error message MESSAGE, which is a printf-style
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format string with optional args.
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If ERRNUM is nonzero, print its corresponding system error message.
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Exit with status STATUS if it is nonzero. */
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/* VARARGS */
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void
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#if defined(VA_START) && __STDC__
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error (int status, int errnum, const char *message, ...)
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#else
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error (status, errnum, message, va_alist)
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int status;
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int errnum;
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char *message;
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va_dcl
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#endif
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{
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#ifdef VA_START
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va_list args;
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#endif
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if (error_print_progname)
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(*error_print_progname) ();
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else
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{
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fflush (stdout);
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fprintf (stderr, "%s: ", program_name);
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}
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#ifdef VA_START
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VA_START (args, message);
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# if HAVE_VPRINTF || _LIBC
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vfprintf (stderr, message, args);
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# else
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_doprnt (message, args, stderr);
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# endif
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va_end (args);
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#else
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fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
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#endif
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++error_message_count;
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if (errnum)
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fprintf (stderr, ": %s", strerror (errnum));
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putc ('\n', stderr);
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fflush (stderr);
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if (status)
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exit (status);
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}
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