X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ferror.c;h=ffa54c39628cc275c9a26bac2067fc0b747877e6;hb=de1b0c616f4497865334c973236206a7d391fd23;hp=7e61f150707c9f27f8e098d477f5fd45f2bf2cbe;hpb=43e78b970f396160a887c9da94531569faeda8a0;p=gnulib.git

diff --git a/lib/error.c b/lib/error.c
index 7e61f1507..ffa54c396 100644
--- a/lib/error.c
+++ b/lib/error.c
@@ -1,54 +1,95 @@
-/* error.c -- error handler for noninteractive utilities
-   Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
+/* Error handler for noninteractive utilities
+   Copyright (C) 1990-2000 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;
@@ -57,49 +98,164 @@ private_strerror (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 || _LIBC
+      char errbuf[1024];
+# if HAVE_WORKING_STRERROR_R || _LIBC
+      fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
+# else
+      /* 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);
+# endif
+#else
+      fprintf (stderr, ": %s", strerror (errnum));
+#endif
+    }
+  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
 {
-  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 || _LIBC
+      char errbuf[1024];
+# if HAVE_WORKING_STRERROR_R || _LIBC
+      fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
+# else
+      /* 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);
+# endif
+#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