pmt: revert 7f8090b

include/libgnulib/xgetaname-impl.h

@@ -1,63 +0,0 @@
-/* xgetaname-impl.c -- common implementation of xgethostname and xgetdomainname
-
-   Copyright (C) 1992, 1996, 2000-2001, 2003-2006, 2009-2024 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 3 of the License, 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, see <https://www.gnu.org/licenses/>.  */
-
-/* written by Jim Meyering and Paul Eggert */
-
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "xalloc.h"
-
-/* Return the current host or domain name in malloc'd storage.
-   If malloc fails, exit.
-   Upon any other failure, return NULL and set errno.  */
-char *
-XGETANAME (void)
-{
-  char buf[100];
-  idx_t size = sizeof buf;
-  char *name = buf;
-  char *alloc = NULL;
-
-  while (1)
-    {
-      /* Use SIZE_1 here rather than SIZE to work around the bug in
-         SunOS 5.5's gethostname whereby it NUL-terminates HOSTNAME
-         even when the name is as long as the supplied buffer.  */
-      idx_t size_1 = size - 1;
-      name[size_1] = '\0';
-      errno = 0;
-      if (GETANAME (name, size_1) == 0)
-        {
-          /* Check whether the name was possibly truncated; POSIX does not
-             specify whether a truncated name is null-terminated.  */
-          idx_t actual_size = strlen (name) + 1;
-          if (actual_size < size_1)
-            return alloc ? alloc : ximemdup (name, actual_size);
-          errno = 0;
-        }
-      free (alloc);
-      if (errno != 0 && errno != ENAMETOOLONG && errno != EINVAL
-          /* macOS/Darwin does this when SIZE_1 is too small.  */
-          && errno != ENOMEM)
-        return NULL;
-      name = alloc = xpalloc (NULL, &size, 1, -1, 1);
-    }
-}