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This commit is contained in:
Sergey Poznyakoff
295
src/xheader.c
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295
src/xheader.c
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/* This file is part of GNU Tar
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Copyright (C) 2003 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "system.h"
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#include <grp.h>
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#include <hash.h>
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#include <pwd.h>
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#include <quotearg.h>
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#include "common.h"
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/* Forward declarations */
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static void dummy_handler (struct tar_stat_info *st, char *keyword, char *arg);
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static void atime_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void atime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void gid_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void gid_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void gname_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void gname_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void linkpath_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void linkpath_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void mtime_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void mtime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void ctime_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void ctime_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void path_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void path_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void size_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void size_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void uid_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void uid_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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static void uname_coder (struct tar_stat_info *st, char *keyword, char *arg);
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static void uname_decoder (struct tar_stat_info *st, char *keyword, char *arg);
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/* General Interface */
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struct xhdr_tab
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{
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char *keyword;
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void (*coder) (struct tar_stat_info *st, char *keyword, char *arg);
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void (*decoder) (struct tar_stat_info *st, char *keyword, char *arg);
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};
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struct xhdr_tab xhdr_tab[] = {
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{ "atime", atime_coder, atime_decoder },
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{ "comment", dummy_handler, dummy_handler },
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{ "charset", dummy_handler, dummy_handler },
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{ "ctime", ctime_coder, ctime_decoder },
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{ "gid", gid_coder, gid_decoder },
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{ "gname", gname_coder, gname_decoder },
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{ "linkpath", linkpath_coder, linkpath_decoder },
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{ "mtime", mtime_coder, mtime_decoder },
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{ "path", path_coder, path_decoder },
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{ "size", size_coder, size_decoder },
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{ "uid", uid_coder, uid_decoder },
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{ "uname", uname_coder, uname_decoder },
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{ NULL },
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};
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static struct xhdr_tab *
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locate_handler (char *keyword)
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{
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struct xhdr_tab *p;
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for (p = xhdr_tab; p->keyword; p++)
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if (strcmp (p->keyword, keyword) == 0)
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return p;
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return NULL;
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}
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static int
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decode_record (char **p, struct tar_stat_info *st)
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{
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size_t len;
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char *keyword, *eqp;
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char *start = *p;
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struct xhdr_tab *t;
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if (**p == 0)
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return 1;
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len = strtoul (*p, p, 10);
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if (**p != ' ')
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{
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ERROR ((0, 0, _("Malformed extended headed")));
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return 1;
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}
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keyword = ++*p;
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for (;*p < start + len; ++*p)
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if (**p == '=')
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break;
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if (**p != '=')
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{
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ERROR ((0, 0, _("Malformed extended headed")));
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return 1;
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}
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eqp = *p;
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**p = 0;
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t = locate_handler (keyword);
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if (t)
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{
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char endc;
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char *value;
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value = ++*p;
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endc = start[len-1];
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start[len-1] = 0;
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t->decoder (st, keyword, value);
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start[len-1] = endc;
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}
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*eqp = '=';
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*p = &start[len];
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return 0;
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}
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void
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xheader_decode (struct tar_stat_info *st)
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{
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char *p, *endp;
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p = extended_header.blocks->buffer;
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endp = &extended_header.blocks[extended_header.nblocks-1].buffer
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[sizeof(extended_header.blocks[0])-1];
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while (p < endp)
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if (decode_record (&p, st))
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break;
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}
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void
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xheader_read (union block *p, size_t size)
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{
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size_t i;
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free (extended_header.blocks);
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extended_header.nblocks = (size + BLOCKSIZE - 1) / BLOCKSIZE;
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extended_header.blocks = xmalloc (sizeof (extended_header.blocks[0]) *
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extended_header.nblocks);
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set_next_block_after (p);
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for (i = 0; i < extended_header.nblocks; i++)
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{
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p = find_next_block ();
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memcpy (&extended_header.blocks[i], p, sizeof (p[0]));
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set_next_block_after (p);
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}
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}
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/* Implementations */
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static void
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dummy_handler (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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atime_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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atime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_atime = strtoul (arg, NULL, 0);
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}
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static void
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gid_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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gid_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_gid = strtoul (arg, NULL, 0);
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}
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static void
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gname_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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gname_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->gname = strdup (arg);
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}
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static void
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linkpath_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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linkpath_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->link_name = strdup (arg);
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}
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static void
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ctime_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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ctime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_ctime = strtoul (arg, NULL, 0);
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}
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static void
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mtime_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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mtime_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_mtime = strtoul (arg, NULL, 0);
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}
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static void
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path_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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path_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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assign_string (&st->orig_file_name, arg);
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assign_string (&st->file_name, arg);
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st->had_trailing_slash = strip_trailing_slashes (st->file_name);
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}
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static void
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size_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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size_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_size = strtoul (arg, NULL, 0);
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}
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static void
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uid_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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uid_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->stat.st_uid = strtoul (arg, NULL, 0);
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}
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static void
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uname_coder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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}
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static void
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uname_decoder (struct tar_stat_info *st, char *keyword, char *arg)
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{
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st->uname = strdup (arg);
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}
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