Adding upstream version 9.4.upstream/9.4upstream

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

1 files changed, 98 insertions, 0 deletions

diff --git a/lib/mknodat.c b/lib/mknodat.c
new file mode 100644
index 0000000..3ed38e1
--- /dev/null
+++ b/lib/mknodat.c
@@ -0,0 +1,98 @@
+/* Create an inode relative to an open directory.
+   Copyright (C) 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 Eric Blake */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/stat.h>
+
+#include <stdlib.h>
+
+#if HAVE_MKNODAT
+
+# include <errno.h>
+# include <fcntl.h>
+# include <string.h>
+
+int
+rpl_mknodat (int fd, char const *file, mode_t mode, dev_t dev)
+#undef mknodat
+{
+  /* Use the original mknodat(), but correct the trailing slash handling.  */
+  size_t len = strlen (file);
+  if (len && file[len - 1] == '/')
+    {
+      struct stat st;
+
+      if (fstatat (fd, file, &st, AT_SYMLINK_NOFOLLOW) < 0)
+        {
+          if (errno == EOVERFLOW)
+            /* It's surely a file, not a directory.  */
+            errno = ENOTDIR;
+        }
+      else
+        {
+          /* It's a directory, otherwise fstatat() would have reported an error
+             ENOTDIR.  */
+          errno = EEXIST;
+        }
+      return -1;
+    }
+
+  return mknodat (fd, file, mode, dev);
+}
+
+#else
+
+# if !HAVE_MKNOD
+
+#  include <errno.h>
+
+/* Mingw lacks mknod, so this wrapper is trivial.  */
+
+int
+mknodat (_GL_UNUSED int fd, _GL_UNUSED char const *path,
+         _GL_UNUSED mode_t mode, _GL_UNUSED dev_t dev)
+{
+  errno = ENOSYS;
+  return -1;
+}
+
+# else
+
+/* Create a file system node FILE relative to directory FD, with
+   access permissions and file type in MODE, and device type in DEV.
+   Usually, non-root applications can only create named fifos, with
+   DEV set to 0.  If possible, create the node without changing the
+   working directory.  Otherwise, resort to using save_cwd/fchdir,
+   then mknod/restore_cwd.  If either the save_cwd or the restore_cwd
+   fails, then give a diagnostic and exit nonzero.  */
+
+#  define AT_FUNC_NAME mknodat
+#  define AT_FUNC_F1 mknod
+#  define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, dev_t dev
+#  define AT_FUNC_POST_FILE_ARGS        , mode, dev
+#  include "at-func.c"
+#  undef AT_FUNC_NAME
+#  undef AT_FUNC_F1
+#  undef AT_FUNC_POST_FILE_PARAM_DECLS
+#  undef AT_FUNC_POST_FILE_ARGS
+
+# endif
+
+#endif