Adding upstream version 9.4.upstream/9.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/xgetaname-impl.h b/lib/xgetaname-impl.h
new file mode 100644
index 0000000..ab11828
--- /dev/null
+++ b/lib/xgetaname-impl.h
@@ -0,0 +1,63 @@
+/* xgetaname-impl.c -- common implementation of xgethostname and xgetdomainname
+
+   Copyright (C) 1992, 1996, 2000-2001, 2003-2006, 2009-2023 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);
+    }
+}