New file

src/xheader.c

@@ -0,0 +1,295 @@
+/* This file is part of GNU Tar
+
+   Copyright (C) 2003 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.  */
+
+#include "system.h"
+
+#include <grp.h>
+#include <hash.h>
+#include <pwd.h>
+#include <quotearg.h>
+
+#include "common.h"
+
+/* Forward declarations */
+static void dummy_handler (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void atime_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void atime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void gid_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void gid_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void gname_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void gname_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void linkpath_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void linkpath_decoder (struct tar_stat_info *st, char *keyword, char *arg);  
+
+static void mtime_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void mtime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void ctime_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void ctime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+     
+static void path_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void path_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void size_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void size_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void uid_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void uid_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+static void uname_coder (struct tar_stat_info *st, char *keyword, char *arg); 
+static void uname_decoder (struct tar_stat_info *st, char *keyword, char *arg);
+
+/* General Interface */
+
+struct xhdr_tab
+{
+  char *keyword;
+  void (*coder) (struct tar_stat_info *st, char *keyword, char *arg);
+  void (*decoder) (struct tar_stat_info *st, char *keyword, char *arg);
+};
+
+struct xhdr_tab xhdr_tab[] = {
+  { "atime",	atime_coder,    atime_decoder },
+  { "comment",	dummy_handler,  dummy_handler },
+  { "charset",	dummy_handler,  dummy_handler },
+  { "ctime",	ctime_coder,    ctime_decoder },
+  { "gid",	gid_coder,      gid_decoder },
+  { "gname",	gname_coder,    gname_decoder },
+  { "linkpath",	linkpath_coder, linkpath_decoder },
+  { "mtime",	mtime_coder,    mtime_decoder },
+  { "path",	path_coder,     path_decoder },
+  { "size",	size_coder,     size_decoder },
+  { "uid",	uid_coder,      uid_decoder },
+  { "uname",	uname_coder,    uname_decoder },    
+  { NULL },
+};
+
+static struct xhdr_tab *
+locate_handler (char *keyword)
+{
+  struct xhdr_tab *p;
+
+  for (p = xhdr_tab; p->keyword; p++)
+    if (strcmp (p->keyword, keyword) == 0)
+      return p;
+  return NULL;
+}
+
+static int
+decode_record (char **p, struct tar_stat_info *st)
+{
+  size_t len;
+  char *keyword, *eqp;
+  char *start = *p;
+  struct xhdr_tab *t;
+
+  if (**p == 0)
+    return 1;
+  
+  len = strtoul (*p, p, 10);
+  if (**p != ' ')
+    {
+      ERROR ((0, 0, _("Malformed extended headed")));
+      return 1;
+    }
+  
+  keyword = ++*p;
+  for (;*p < start + len; ++*p)
+    if (**p == '=')
+      break;
+
+  if (**p != '=')
+    {
+      ERROR ((0, 0, _("Malformed extended headed")));
+      return 1;
+    }
+
+  eqp = *p;
+  **p = 0;
+  t = locate_handler (keyword);
+  if (t)
+    {
+      char endc;
+      char *value;
+
+      value = ++*p;
+      
+      endc = start[len-1];
+      start[len-1] = 0;
+      t->decoder (st, keyword, value);
+      start[len-1] = endc;
+    }
+  *eqp = '=';
+  *p = &start[len];
+  return 0;
+}
+
+void
+xheader_decode (struct tar_stat_info *st)
+{
+  char *p, *endp;
+
+  p = extended_header.blocks->buffer;
+  endp = &extended_header.blocks[extended_header.nblocks-1].buffer
+                                        [sizeof(extended_header.blocks[0])-1];
+  while (p < endp)
+    if (decode_record (&p, st))
+      break;
+}
+
+void
+xheader_read (union block *p, size_t size)
+{
+  size_t i;
+  
+  free (extended_header.blocks);
+  extended_header.nblocks = (size + BLOCKSIZE - 1) / BLOCKSIZE;
+  extended_header.blocks = xmalloc (sizeof (extended_header.blocks[0]) *
+					    extended_header.nblocks);
+  set_next_block_after (p);
+  for (i = 0; i < extended_header.nblocks; i++)
+    {
+      p = find_next_block ();
+      memcpy (&extended_header.blocks[i], p, sizeof (p[0]));
+      set_next_block_after (p);
+    }
+}
+
+
+/* Implementations */
+static void
+dummy_handler (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+atime_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+atime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_atime = strtoul (arg, NULL, 0);
+}
+
+static void
+gid_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+gid_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_gid = strtoul (arg, NULL, 0);
+}
+
+static void
+gname_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+gname_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->gname = strdup (arg);
+}
+
+static void
+linkpath_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+linkpath_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->link_name = strdup (arg);
+}
+
+static void
+ctime_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+ctime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_ctime = strtoul (arg, NULL, 0);
+}
+
+static void
+mtime_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+mtime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_mtime = strtoul (arg, NULL, 0);
+}
+
+static void
+path_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+path_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  assign_string (&st->orig_file_name, arg);
+  assign_string (&st->file_name, arg);
+  st->had_trailing_slash = strip_trailing_slashes (st->file_name);
+}
+
+static void
+size_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+size_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_size = strtoul (arg, NULL, 0);
+}
+
+static void
+uid_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+uid_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->stat.st_uid = strtoul (arg, NULL, 0);
+}
+
+static void
+uname_coder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+}
+
+static void
+uname_decoder (struct tar_stat_info *st, char *keyword, char *arg)
+{
+  st->uname = strdup (arg);
+}
+