Initial implementation (temporarily disabled).

2 files changed, 216 insertions, 0 deletions

diff --git a/lib/savedirinfo.c b/lib/savedirinfo.c
new file mode 100644
index 00000000..446c9ff9
--- /dev/null
+++ b/lib/savedirinfo.c
@@ -0,0 +1,183 @@
+/* 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
+
+#if HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#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"
+#include "extendbuf.h"
+#include "savedirinfo.h"
+
+#undef HAVE_STRUCT_DIRENT_D_TYPE
+
+
+#if defined HAVE_STRUCT_DIRENT_D_TYPE
+static mode_t
+type_to_mode(unsigned type)
+{
+  mode_t result = 0;
+  
+  switch (type)
+    {
+#ifdef DT_FIFO
+    case DT_FIFO: return S_IFIFO;
+#endif
+#ifdef DT_CHR
+    case DT_CHR: return S_IFCHR;
+#endif
+#ifdef DT_DIR
+    case DT_DIR: return S_IFDIR;
+#endif
+#ifdef DT_BLK
+    case DT_BLK: return S_IFBLK;
+#endif
+#ifdef DT_REG
+    case DT_REG: return S_IFREG;
+#endif
+#ifdef DT_LNK
+    case DT_LNK: return S_IFLNK;
+#endif
+#ifdef DT_SOCK
+    case DT_SOCK: return S_IFSOCK;
+#endif
+    default:
+      return 0;			/* Unknown. */
+    }
+}
+
+#endif
+
+
+/* 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.  */
+
+char *
+savedirinfo (const char *dir, struct savedir_dirinfo **extra)
+{
+  DIR *dirp;
+  struct dirent *dp;
+  char *name_space;
+  size_t namebuf_allocated = 0u, namebuf_used = 0u;
+#if defined HAVE_STRUCT_DIRENT_D_TYPE
+  size_t extra_allocated = 0u, extra_used = 0u;
+  struct savedir_dirinfo *info = NULL;
+#endif
+  int save_errno;
+
+  if (extra)
+    *extra = NULL;
+  
+  dirp = opendir (dir);
+  if (dirp == NULL)
+    return NULL;
+
+  errno = 0;
+  name_space = NULL;
+  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')
+	{
+	  /* Remember the name. */
+	  size_t entry_size = strlen (entry) + 1;
+	  name_space = extendbuf(name_space, namebuf_used+entry_size, &namebuf_allocated);
+	  memcpy (name_space + namebuf_used, entry, entry_size);
+	  namebuf_used += entry_size;
+
+
+#if defined HAVE_STRUCT_DIRENT_D_TYPE
+	  /* Remember the type. */
+	  if (extra)
+	    {
+	      info = extendbuf(info,
+			       (extra_used+1) * sizeof(struct savedir_dirinfo),
+			       &extra_allocated);
+	      info[extra_used].type_info = type_to_mode(dp->d_type);
+	    }
+#endif
+	}
+    }
+  
+  name_space = extendbuf(name_space, namebuf_used+1, &namebuf_allocated);
+  name_space[namebuf_used] = '\0';
+  
+  save_errno = errno;
+  if (CLOSEDIR (dirp) != 0)
+    save_errno = errno;
+  if (save_errno != 0)
+    {
+      free (name_space);
+      errno = save_errno;
+      return NULL;
+    }
+  
+#if defined HAVE_STRUCT_DIRENT_D_TYPE
+  if (extra && info)
+    *extra = info;
+#endif
+  
+  return name_space;
+}
diff --git a/lib/savedirinfo.h b/lib/savedirinfo.h
new file mode 100644
index 00000000..3b706423
--- /dev/null
+++ b/lib/savedirinfo.h
@@ -0,0 +1,33 @@
+/* Save the list of files in a directory, with additional information.
+
+   Copyright 1997, 1999, 2001, 2003, 2005 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 James Youngman <jay@gnu.org>.
+ * Based on savedir.h by David MacKenzie <djm@gnu.org>.
+ */
+
+#if !defined SAVEDIRINFO_H_
+# define SAVEDIRINFO_H_
+
+struct savedir_dirinfo
+{
+  mode_t type_info;
+};
+
+char *savedirinfo (const char *dir, struct savedir_dirinfo **extra);
+
+#endif