-/* error.c -- error handler for noninteractive utilities
- Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
+/* Error handler for noninteractive utilities
+ Copyright (C) 1990,91,92,93,94,95,96,97,98 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 file is part of the GNU C Library. Its master source is NOT part of
+ the C library, however. The master source lives in /gd/gnu/lib.
- This program is distributed in the hope that it will be useful,
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library 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.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-/* Written by David MacKenzie. */
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
#include <stdio.h>
-#ifdef HAVE_VPRINTF
+#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__
-#include <stdarg.h>
-#define VA_START(args, lastarg) va_start(args, lastarg)
-#else /* !__STDC__ */
-#include <varargs.h>
-#define VA_START(args, lastarg) va_start(args)
-#endif /* !__STDC__ */
+#if STDC_HEADERS || _LIBC
+# include <stdlib.h>
+# include <string.h>
+#else
+void exit ();
+#endif
-#else /* !HAVE_VPRINTF */
+#include "error.h"
-#ifdef HAVE_DOPRNT
-#define va_alist args
-#define va_dcl int args;
-#else /* !HAVE_DOPRNT */
-#define va_alist a1, a2, a3, a4, a5, a6, a7, a8
-#define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
-#endif /* !HAVE_DOPRNT */
+#ifndef _
+# define _(String) String
+#endif
-#endif /* !HAVE_VPRINTF */
+/* 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
+ );
-#ifdef STDC_HEADERS
-#include <stdlib.h>
-#include <string.h>
-#else /* !STDC_HEADERS */
-void exit ();
-#endif /* !STDC_HEADERS */
+/* 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. */
-#ifndef HAVE_STRERROR
+# define program_name program_invocation_name
+# include <errno.h>
+
+/* In GNU libc we want do not want to use the common name `error' directly.
+ Instead make it a weak alias. */
+# define error __error
+# define error_at_line __error_at_line
+
+#else /* not _LIBC */
+
+/* The calling program should define program_name and set it to the
+ name of the executing program. */
+extern char *program_name;
+
+# ifdef HAVE_STRERROR_R
+# define __strerror_r strerror_r
+# else
+# if HAVE_STRERROR
+# ifndef strerror /* On some systems, strerror is a macro */
+char *strerror ();
+# endif
+# else
static char *
private_strerror (errnum)
int errnum;
extern int sys_nerr;
if (errnum > 0 && errnum <= sys_nerr)
- return sys_errlist[errnum];
- return "Unknown system error";
+ return _(sys_errlist[errnum]);
+ return _("Unknown system error");
}
-#define strerror private_strerror
-#endif /* !HAVE_STRERROR */
+# define strerror private_strerror
+# endif /* HAVE_STRERROR */
+# endif /* HAVE_STRERROR_R */
+#endif /* not _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 (HAVE_VPRINTF) && __STDC__
-error (int status, int errnum, char *message, ...)
-#else /* !HAVE_VPRINTF or !__STDC__ */
+#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 /* !HAVE_VPRINTF or !__STDC__ */
+#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)
+ {
+#if defined HAVE_STRERROR_R || defined _LIBC
+ char errbuf[1024];
+ /* Don't use __strerror_r's return value because on some systems
+ (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
+ __strerror_r (errnum, errbuf, sizeof errbuf);
+ fprintf (stderr, ": %s", errbuf);
+#else
+ fprintf (stderr, ": %s", strerror (errnum));
+#endif
+ }
+ putc ('\n', stderr);
+ fflush (stderr);
+ if (status)
+ exit (status);
+}
+\f
+/* 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
{
- extern char *program_name;
-#ifdef HAVE_VPRINTF
+#ifdef VA_START
va_list args;
-#endif /* HAVE_VPRINTF */
+#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;
+ }
- fprintf (stderr, "%s: ", program_name);
-#ifdef HAVE_VPRINTF
+ 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 /* !HAVE_VPRINTF */
-#ifdef HAVE_DOPRNT
- _doprnt (message, &args, stderr);
-#else /* !HAVE_DOPRNT */
+#else
fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
-#endif /* !HAVE_DOPRNT */
-#endif /* !HAVE_VPRINTF */
+#endif
+
+ ++error_message_count;
if (errnum)
- fprintf (stderr, ": %s", strerror (errnum));
+ {
+#if defined HAVE_STRERROR_R || defined _LIBC
+ char errbuf[1024];
+ fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
+#else
+ fprintf (stderr, ": %s", strerror (errnum));
+#endif
+ }
putc ('\n', stderr);
fflush (stderr);
if (status)
exit (status);
}
+
+#ifdef _LIBC
+/* Make the weak alias. */
+# undef error
+# undef error_at_line
+weak_alias (__error, error)
+weak_alias (__error_at_line, error_at_line)
+#endif
projects / gnulib.git / blobdiff