home *** CD-ROM | disk | FTP | other *** search
- /* error.c -- error handler for noninteractive utilities
- Copyright (C) 1990, 91, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
-
- #include <stdio.h>
-
- #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
- # if __STDC__
- # include <stdarg.h>
- # define VA_START(args, lastarg) va_start(args, lastarg)
- # else
- # include <varargs.h>
- # define VA_START(args, lastarg) va_start(args)
- # endif
- #else
- # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
- # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
- #endif
-
- #if STDC_HEADERS || _LIBC
- # include <stdlib.h>
- # include <string.h>
- #else
- void exit ();
- #endif
-
- #ifndef _
- # define _(String) String
- #endif
-
- /* If NULL, error will flush stdout, then print on stderr the program
- name, a colon and a space. Otherwise, error will call this
- function without parameters instead. */
- void (*error_print_progname) (
- #if __STDC__ - 0
- void
- #endif
- );
-
- /* This variable is incremented each time `error' is called. */
- unsigned int error_message_count;
-
- #ifdef _LIBC
- /* In the GNU C library, there is a predefined variable for this. */
-
- # define program_name program_invocation_name
- # include <errno.h>
-
- #else
-
- /* The calling program should define program_name and set it to the
- name of the executing program. */
- extern char *program_name;
-
- # if HAVE_STRERROR
- # ifndef strerror /* On some systems, strerror is a macro */
- char *strerror ();
- # endif
- # else
- static char *
- private_strerror (errnum)
- int errnum;
- {
- extern char *sys_errlist[];
- extern int sys_nerr;
-
- if (errnum > 0 && errnum <= sys_nerr)
- return sys_errlist[errnum];
- return _("Unknown system error");
- }
- # define strerror private_strerror
- # endif /* HAVE_STRERROR */
- #endif /* _LIBC */
-
- /* Print the program name and error message MESSAGE, which is a printf-style
- format string with optional args.
- If ERRNUM is nonzero, print its corresponding system error message.
- Exit with status STATUS if it is nonzero. */
- /* VARARGS */
-
- void
- #if defined(VA_START) && __STDC__
- error (int status, int errnum, const char *message, ...)
- #else
- error (status, errnum, message, va_alist)
- int status;
- int errnum;
- char *message;
- va_dcl
- #endif
- {
- #ifdef VA_START
- va_list args;
- #endif
-
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
- fflush (stdout);
- fprintf (stderr, "%s: ", program_name);
- }
-
- #ifdef VA_START
- VA_START (args, message);
- # if HAVE_VPRINTF || _LIBC
- vfprintf (stderr, message, args);
- # else
- _doprnt (message, args, stderr);
- # endif
- va_end (args);
- #else
- fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
- #endif
-
- ++error_message_count;
- if (errnum)
- fprintf (stderr, ": %s", strerror (errnum));
- putc ('\n', stderr);
- fflush (stderr);
- if (status)
- exit (status);
- }
-
- /* Sometimes we want to have at most one error per line. This
- variable controls whether this mode is selected or not. */
- int error_one_per_line;
-
- void
- #if defined(VA_START) && __STDC__
- error_at_line (int status, int errnum, const char *file_name,
- unsigned int line_number, const char *message, ...)
- #else
- error_at_line (status, errnum, file_name, line_number, message, va_alist)
- int status;
- int errnum;
- const char *file_name;
- unsigned int line_number;
- char *message;
- va_dcl
- #endif
- {
- #ifdef VA_START
- va_list args;
- #endif
-
- if (error_one_per_line)
- {
- static const char *old_file_name;
- static unsigned int old_line_number;
-
- if (old_line_number == line_number &&
- (file_name == old_file_name || !strcmp (old_file_name, file_name)))
- /* Simply return and print nothing. */
- return;
-
- old_file_name = file_name;
- old_line_number = line_number;
- }
-
- if (error_print_progname)
- (*error_print_progname) ();
- else
- {
- fflush (stdout);
- fprintf (stderr, "%s:", program_name);
- }
-
- if (file_name != NULL)
- fprintf (stderr, "%s:%d: ", file_name, line_number);
-
- #ifdef VA_START
- VA_START (args, message);
- # if HAVE_VPRINTF || _LIBC
- vfprintf (stderr, message, args);
- # else
- _doprnt (message, args, stderr);
- # endif
- va_end (args);
- #else
- fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
- #endif
-
- ++error_message_count;
- if (errnum)
- fprintf (stderr, ": %s", strerror (errnum));
- putc ('\n', stderr);
- fflush (stderr);
- if (status)
- exit (status);
- }
-