.

[gnulib.git] / lib / error.c

diff --git a/lib/error.c b/lib/error.c
index b167b83..4eff5d0 100644 (file)
--- a/lib/error.c
+++ b/lib/error.c
@@ -1,23 +1,27 @@
-/* error.c -- error handler for noninteractive utilities
-   Copyright (C) 1990, 91, 92, 93, 94, 95, 96 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 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.  */
+   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.  */
 
 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
 
@@ -43,13 +47,12 @@
 void exit ();
 #endif
 
+#include "error.h"
+
 #ifndef _
 # define _(String) String
 #endif
 
-/* Get prototypes for the functions defined here.  */
-#include <error.h>
-
 /* 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.  */
@@ -68,17 +71,25 @@ unsigned int error_message_count;
 # define program_name program_invocation_name
 # include <errno.h>
 
-#else  /* not _LIBC */
+/* 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;
 
-# if HAVE_STRERROR
-#  ifndef strerror             /* On some systems, strerror is a macro */
-char *strerror ();
-#  endif
+# 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;
@@ -87,11 +98,12 @@ private_strerror (errnum)
   extern int sys_nerr;
 
   if (errnum > 0 && errnum <= sys_nerr)
-    return sys_errlist[errnum];
+    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
@@ -101,7 +113,7 @@ private_strerror (errnum)
 /* VARARGS */
 
 void
-#if defined(VA_START) && __STDC__
+#if defined VA_START && __STDC__
 error (int status, int errnum, const char *message, ...)
 #else
 error (status, errnum, message, va_alist)
@@ -137,7 +149,17 @@ error (status, errnum, message, va_alist)
 
   ++error_message_count;
   if (errnum)
-    fprintf (stderr, ": %s", strerror (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)
@@ -149,7 +171,7 @@ error (status, errnum, message, va_alist)
 int error_one_per_line;
 
 void
-#if defined(VA_START) && __STDC__
+#if defined VA_START && __STDC__
 error_at_line (int status, int errnum, const char *file_name,
               unsigned int line_number, const char *message, ...)
 #else
@@ -205,9 +227,24 @@ error_at_line (status, errnum, file_name, line_number, message, va_alist)
 
   ++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