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/* Encode long filenames for GNU tar.
Copyright 1988, 92, 94, 96, 97, 99, 2000 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 "common.h"
#include <quotearg.h>
struct mangled
{
struct mangled *next;
int type;
char mangled[NAME_FIELD_SIZE];
char *linked_to;
char normal[1];
};
/* Extract a GNUTYPE_NAMES record contents. It seems that such are
not produced anymore by GNU tar, but we leave the reading code
around nevertheless, for salvaging old tapes. */
void
extract_mangle (void)
{
off_t size = current_stat.st_size;
char *buffer = xmalloc ((size_t) (size + 1));
char *copy = buffer;
char *cursor = buffer;
if (size != (size_t) size || size == (size_t) -1)
xalloc_die ();
buffer[size] = '\0';
while (size > 0)
{
union block *block = find_next_block ();
size_t available;
if (!block)
{
ERROR ((0, 0, _("Unexpected EOF in mangled names")));
return;
}
available = available_space_after (block);
if (available > size)
available = size;
memcpy (copy, block->buffer, available);
copy += available;
size -= available;
set_next_block_after ((union block *) (block->buffer + available - 1));
}
while (*cursor)
{
char *next_cursor;
char *name;
char *name_end;
next_cursor = strchr (cursor, '\n');
*next_cursor++ = '\0';
if (!strncmp (cursor, "Rename ", 7))
{
name = cursor + 7;
name_end = strchr (name, ' ');
while (strncmp (name_end, " to ", 4))
{
name_end++;
name_end = strchr (name_end, ' ');
}
*name_end = '\0';
if (next_cursor[-2] == '/')
next_cursor[-2] = '\0';
unquote_string (name_end + 4);
if (rename (name, name_end + 4))
ERROR ((0, errno, _("%s: Cannot rename to %s"),
quotearg_colon (name), quote_n (1, name_end + 4)));
else if (verbose_option)
WARN ((0, 0, _("Renamed %s to %s"), name, name_end + 4));
}
#ifdef HAVE_SYMLINK
else if (!strncmp (cursor, "Symlink ", 8))
{
name = cursor + 8;
name_end = strchr (name, ' ');
while (strncmp (name_end, " to ", 4))
{
name_end++;
name_end = strchr (name_end, ' ');
}
*name_end = '\0';
unquote_string (name);
unquote_string (name_end + 4);
if (symlink (name, name_end + 4)
&& (unlink (name_end + 4) || symlink (name, name_end + 4)))
ERROR ((0, errno, _("%s: Cannot symlink to %s"),
quotearg_colon (name), quote_n (1, name_end + 4)));
else if (verbose_option)
WARN ((0, 0, _("Symlinked %s to %s"), name, name_end + 4));
}
#endif
else
ERROR ((0, 0, _("Unknown demangling command %s"), cursor));
cursor = next_cursor;
}
}
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