1 files changed, 123 insertions, 0 deletions

diff --git a/lib/savedir.c b/lib/savedir.c
new file mode 100644
index 0000000000000..c92e62eadccdf
--- /dev/null
+++ b/lib/savedir.c
@@ -0,0 +1,123 @@
+/* savedir.c -- save the list of files in a directory in a string
+
+   Copyright 1990, 1997, 1998, 1999, 2000, 2001, 2003, 2004 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 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, 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
+# include <config.h>
+#endif
+
+#include "savedir.h"
+
+#include <sys/types.h>
+
+#include <errno.h>
+
+#if HAVE_DIRENT_H
+# include <dirent.h>
+#else
+# define dirent direct
+# if HAVE_SYS_NDIR_H
+#  include <sys/ndir.h>
+# endif
+# if HAVE_SYS_DIR_H
+#  include <sys/dir.h>
+# endif
+# if HAVE_NDIR_H
+#  include <ndir.h>
+# endif
+#endif
+
+#ifdef CLOSEDIR_VOID
+/* Fake a return value. */
+# define CLOSEDIR(d) (closedir (d), 0)
+#else
+# define CLOSEDIR(d) closedir (d)
+#endif
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "xalloc.h"
+
+/* Return a freshly allocated string containing the filenames
+   in directory DIR, separated by '\0' characters;
+   the end is marked by two '\0' characters in a row.
+   Return NULL (setting errno) if DIR cannot be opened, read, or closed.  */
+
+#ifndef NAME_SIZE_DEFAULT
+# define NAME_SIZE_DEFAULT 512
+#endif
+
+char *
+savedir (const char *dir)
+{
+  DIR *dirp;
+  struct dirent *dp;
+  char *name_space;
+  size_t allocated = NAME_SIZE_DEFAULT;
+  size_t used = 0;
+  int save_errno;
+
+  dirp = opendir (dir);
+  if (dirp == NULL)
+    return NULL;
+
+  name_space = xmalloc (allocated);
+
+  errno = 0;
+  while ((dp = readdir (dirp)) != NULL)
+    {
+      /* Skip "", ".", and "..".  "" is returned by at least one buggy
+         implementation: Solaris 2.4 readdir on NFS file systems.  */
+      char const *entry = dp->d_name;
+      if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0')
+	{
+	  size_t entry_size = strlen (entry) + 1;
+	  if (used + entry_size < used)
+	    xalloc_die ();
+	  if (allocated <= used + entry_size)
+	    {
+	      do
+		{
+		  if (2 * allocated < allocated)
+		    xalloc_die ();
+		  allocated *= 2;
+		}
+	      while (allocated <= used + entry_size);
+
+	      name_space = xrealloc (name_space, allocated);
+	    }
+	  memcpy (name_space + used, entry, entry_size);
+	  used += entry_size;
+	}
+    }
+  name_space[used] = '\0';
+  save_errno = errno;
+  if (CLOSEDIR (dirp) != 0)
+    save_errno = errno;
+  if (save_errno != 0)
+    {
+      free (name_space);
+      errno = save_errno;
+      return NULL;
+    }
+  return name_space;
+}