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GNU tar 1.12
This commit is contained in:
Paul Eggert
305
src/mangle.c
305
src/mangle.c
@@ -1,270 +1,127 @@
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/* mangle.c -- encode long filenames
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Copyright (C) 1988, 1992 Free Software Foundation
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/* Encode long filenames for GNU tar.
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Copyright (C) 1988, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
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This file is part of GNU Tar.
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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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GNU Tar is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later 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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GNU Tar is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General 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 Place - Suite 330, Boston, MA 02111-1307, USA. */
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You should have received a copy of the GNU General Public License
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along with GNU Tar; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "system.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <time.h>
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time_t time ();
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#include "tar.h"
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#include "port.h"
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void add_buffer ();
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extern PTR ck_malloc ();
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void finish_header ();
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extern PTR init_buffer ();
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extern char *quote_copy_string ();
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extern char *get_buffer ();
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char *un_quote_string ();
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extern union record *start_header ();
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extern struct stat hstat; /* Stat struct corresponding */
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#include "common.h"
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struct mangled
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{
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struct mangled *next;
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int type;
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char mangled[NAMSIZ];
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char mangled[NAME_FIELD_SIZE];
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char *linked_to;
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char normal[1];
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};
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/* Should use a hash table, etc. . */
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struct mangled *first_mangle;
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int mangled_num = 0;
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#if 0 /* Deleted because there is now a better way to do all this */
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char *
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find_mangled (name)
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char *name;
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{
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struct mangled *munge;
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for (munge = first_mangle; munge; munge = munge->next)
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if (!strcmp (name, munge->normal))
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return munge->mangled;
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return 0;
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}
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#ifdef S_ISLNK
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void
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add_symlink_mangle (symlink, linkto, buffer)
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char *symlink;
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char *linkto;
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char *buffer;
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{
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struct mangled *munge, *kludge;
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munge = (struct mangled *) ck_malloc (sizeof (struct mangled) + strlen (symlink) + strlen (linkto) + 2);
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if (!first_mangle)
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first_mangle = munge;
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else
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{
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for (kludge = first_mangle; kludge->next; kludge = kludge->next)
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;
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kludge->next = munge;
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}
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munge->type = 1;
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munge->next = 0;
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strcpy (munge->normal, symlink);
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munge->linked_to = munge->normal + strlen (symlink) + 1;
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strcpy (munge->linked_to, linkto);
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sprintf (munge->mangled, "@@MaNgLeD.%d", mangled_num++);
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strncpy (buffer, munge->mangled, NAMSIZ);
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}
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#endif
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/*---------------------------------------------------------------------.
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| Extract a GNUTYPE_NAMES record contents. It seems that such are not |
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| produced anymore by GNU tar, but we leave the reading code around |
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| nevertheless, for salvaging old tapes. |
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`---------------------------------------------------------------------*/
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void
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add_mangle (name, buffer)
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char *name;
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char *buffer;
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extract_mangle (void)
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{
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struct mangled *munge, *kludge;
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int size = current_stat.st_size;
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char *buffer = xmalloc ((size_t) (size + 1));
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char *copy = buffer;
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char *cursor = buffer;
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munge = (struct mangled *) ck_malloc (sizeof (struct mangled) + strlen (name));
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if (!first_mangle)
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first_mangle = munge;
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else
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{
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for (kludge = first_mangle; kludge->next; kludge = kludge->next)
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;
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kludge->next = munge;
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}
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munge->next = 0;
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munge->type = 0;
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strcpy (munge->normal, name);
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sprintf (munge->mangled, "@@MaNgLeD.%d", mangled_num++);
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strncpy (buffer, munge->mangled, NAMSIZ);
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}
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buffer[size] = '\0';
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void
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write_mangled ()
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{
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struct mangled *munge;
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struct stat hstat;
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union record *header;
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char *ptr1, *ptr2;
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PTR the_buffer;
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int size;
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int bufsize;
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if (!first_mangle)
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return;
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the_buffer = init_buffer ();
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for (munge = first_mangle, size = 0; munge; munge = munge->next)
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{
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ptr1 = quote_copy_string (munge->normal);
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if (!ptr1)
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ptr1 = munge->normal;
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if (munge->type)
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{
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add_buffer (the_buffer, "Symlink ", 8);
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add_buffer (the_buffer, ptr1, strlen (ptr1));
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add_buffer (the_buffer, " to ", 4);
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if (ptr2 = quote_copy_string (munge->linked_to))
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{
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add_buffer (the_buffer, ptr2, strlen (ptr2));
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free (ptr2);
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}
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else
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add_buffer (the_buffer, munge->linked_to, strlen (munge->linked_to));
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}
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else
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{
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add_buffer (the_buffer, "Rename ", 7);
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add_buffer (the_buffer, munge->mangled, strlen (munge->mangled));
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add_buffer (the_buffer, " to ", 4);
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add_buffer (the_buffer, ptr1, strlen (ptr1));
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}
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add_buffer (the_buffer, "\n", 1);
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if (ptr1 != munge->normal)
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free (ptr1);
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}
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bzero (&hstat, sizeof (struct stat));
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hstat.st_atime = hstat.st_mtime = hstat.st_ctime = time (0);
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ptr1 = get_buffer (the_buffer);
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hstat.st_size = strlen (ptr1);
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header = start_header ("././@MaNgLeD_NaMeS", &hstat);
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header->header.linkflag = LF_NAMES;
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finish_header (header);
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size = hstat.st_size;
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header = findrec ();
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bufsize = endofrecs ()->charptr - header->charptr;
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while (bufsize < size)
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{
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bcopy (ptr1, header->charptr, bufsize);
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ptr1 += bufsize;
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size -= bufsize;
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userec (header + (bufsize - 1) / RECORDSIZE);
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header = findrec ();
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bufsize = endofrecs ()->charptr - header->charptr;
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}
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bcopy (ptr1, header->charptr, size);
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bzero (header->charptr + size, bufsize - size);
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userec (header + (size - 1) / RECORDSIZE);
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}
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#endif
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void
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extract_mangle (head)
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union record *head;
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{
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char *buf;
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char *fromtape;
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char *to;
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char *ptr, *ptrend;
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char *nam1, *nam1end;
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int size;
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int copied;
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size = hstat.st_size;
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buf = to = ck_malloc (size + 1);
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buf[size] = '\0';
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while (size > 0)
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{
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fromtape = findrec ()->charptr;
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if (fromtape == 0)
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union block *block = find_next_block ();
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int available;
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if (!block)
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{
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msg ("Unexpected EOF in mangled names!");
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ERROR ((0, 0, _("Unexpected EOF in mangled names")));
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return;
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}
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copied = endofrecs ()->charptr - fromtape;
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if (copied > size)
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copied = size;
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bcopy (fromtape, to, copied);
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to += copied;
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size -= copied;
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userec ((union record *) (fromtape + copied - 1));
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available = available_space_after (block);
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if (available > size)
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available = size;
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memcpy (copy, block->buffer, (size_t) available);
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copy += available;
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size -= available;
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set_next_block_after ((union block *) (block->buffer + available - 1));
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}
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for (ptr = buf; *ptr; ptr = ptrend)
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{
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ptrend = index (ptr, '\n');
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*ptrend++ = '\0';
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if (!strncmp (ptr, "Rename ", 7))
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while (*cursor)
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{
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char *next_cursor;
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char *name;
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char *name_end;
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next_cursor = strchr (cursor, '\n');
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*next_cursor++ = '\0';
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if (!strncmp (cursor, "Rename ", 7))
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{
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nam1 = ptr + 7;
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nam1end = index (nam1, ' ');
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while (strncmp (nam1end, " to ", 4))
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name = cursor + 7;
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name_end = strchr (name, ' ');
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while (strncmp (name_end, " to ", 4))
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{
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nam1end++;
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nam1end = index (nam1end, ' ');
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name_end++;
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name_end = strchr (name_end, ' ');
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}
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*nam1end = '\0';
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if (ptrend[-2] == '/')
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ptrend[-2] = '\0';
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un_quote_string (nam1end + 4);
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if (rename (nam1, nam1end + 4))
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msg_perror ("Can't rename %s to %s", nam1, nam1end + 4);
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else if (f_verbose)
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msg ("Renamed %s to %s", nam1, nam1end + 4);
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*name_end = '\0';
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if (next_cursor[-2] == '/')
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next_cursor[-2] = '\0';
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unquote_string (name_end + 4);
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if (rename (name, name_end + 4))
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ERROR ((0, errno, _("Cannot rename %s to %s"), name, name_end + 4));
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else if (verbose_option)
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WARN ((0, 0, _("Renamed %s to %s"), name, name_end + 4));
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}
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#ifdef S_ISLNK
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else if (!strncmp (ptr, "Symlink ", 8))
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else if (!strncmp (cursor, "Symlink ", 8))
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{
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nam1 = ptr + 8;
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nam1end = index (nam1, ' ');
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while (strncmp (nam1end, " to ", 4))
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name = cursor + 8;
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name_end = strchr (name, ' ');
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while (strncmp (name_end, " to ", 4))
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{
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nam1end++;
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nam1end = index (nam1end, ' ');
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name_end++;
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name_end = strchr (name_end, ' ');
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}
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*nam1end = '\0';
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un_quote_string (nam1);
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un_quote_string (nam1end + 4);
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if (symlink (nam1, nam1end + 4) && (unlink (nam1end + 4) || symlink (nam1, nam1end + 4)))
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msg_perror ("Can't symlink %s to %s", nam1, nam1end + 4);
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else if (f_verbose)
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msg ("Symlinkd %s to %s", nam1, nam1end + 4);
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*name_end = '\0';
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unquote_string (name);
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unquote_string (name_end + 4);
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if (symlink (name, name_end + 4)
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&& (unlink (name_end + 4) || symlink (name, name_end + 4)))
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ERROR ((0, errno, _("Cannot symlink %s to %s"),
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name, name_end + 4));
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else if (verbose_option)
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WARN ((0, 0, _("Symlinked %s to %s"), name, name_end + 4));
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}
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#endif
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else
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msg ("Unknown demangling command %s", ptr);
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ERROR ((0, 0, _("Unknown demangling command %s"), cursor));
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cursor = next_cursor;
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}
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}
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