/* call this to make a layer */
int layer_add()
{
/* reallocate the layer array */
layers = ck_realloc(layers, (layer_ct+1) * sizeof(struct layer));
layers[layer_ct].camera.x = 0;
layers[layer_ct].camera.y = 0;
layers[layer_ct].view.x1 = 0;
layers[layer_ct].view.y1 = 0;
layers[layer_ct].view.x2 = MAX_WIDTH;
layers[layer_ct].view.y2 = MAX_HEIGHT;
layers[layer_ct].sprites = list_create();
layers[layer_ct].map = map_create();
layers[layer_ct].strings = list_create();
layers[layer_ct].visible = 1;
layers[layer_ct].sorted = 0;
layer_ct++;
return layer_ct-1;
}
/*
* Extract a file from the archive.
*/
void
extract_archive ()
{
register char *data;
int fd, check, namelen, written, openflag;
long size;
struct utimbuf acc_upd_times;
register int skipcrud;
register int i;
/* int sparse_ind = 0;*/
union record *exhdr;
struct saved_dir_info *tmp;
/* int end_nulls; */
saverec (&head); /* Make sure it sticks around */
userec (head); /* And go past it in the archive */
decode_header (head, &hstat, &head_standard, 1); /* Snarf fields */
if ((f_confirm && !confirm ("extract", current_file_name)) ||
(f_exstdout && head->header.linkflag != LF_OLDNORMAL &&
head->header.linkflag != LF_NORMAL &&
head->header.linkflag != LF_CONTIG))
{
if (head->header.isextended)
skip_extended_headers ();
skip_file ((long) hstat.st_size);
saverec ((union record **) 0);
return;
}
/* Print the record from 'head' and 'hstat' */
if (f_verbose)
print_header ();
/*
* Check for fully specified pathnames and other atrocities.
*
* Note, we can't just make a pointer to the new file name,
* since saverec() might move the header and adjust "head".
* We have to start from "head" every time we want to touch
* the header record.
*/
skipcrud = 0;
while (!f_absolute_paths
&& '/' == current_file_name[skipcrud])
{
static int warned_once = 0;
skipcrud++; /* Force relative path */
if (!warned_once++)
{
msg ("Removing leading / from absolute path names in the archive.");
}
}
switch (head->header.linkflag)
{
default:
msg ("Unknown file type '%c' for %s, extracted as normal file",
head->header.linkflag, skipcrud + current_file_name);
/* FALL THRU */
/*
* JK - What we want to do if the file is sparse is loop through
* the array of sparse structures in the header and read in
* and translate the character strings representing 1) the offset
* at which to write and 2) how many bytes to write into numbers,
* which we store into the scratch array, "sparsearray". This
* array makes our life easier the same way it did in creating
* the tar file that had to deal with a sparse file.
*
* After we read in the first five (at most) sparse structures,
* we check to see if the file has an extended header, i.e.,
* if more sparse structures are needed to describe the contents
* of the new file. If so, we read in the extended headers
* and continue to store their contents into the sparsearray.
*/
case LF_SPARSE:
sp_array_size = 10;
sparsearray = (struct sp_array *) ck_malloc (sp_array_size * sizeof (struct sp_array));
for (i = 0; i < SPARSE_IN_HDR; i++)
{
sparsearray[i].offset =
from_oct (1 + 12, head->header.sp[i].offset);
sparsearray[i].numbytes =
from_oct (1 + 12, head->header.sp[i].numbytes);
if (!sparsearray[i].numbytes)
break;
}
/* end_nulls = from_oct(1+12, head->header.ending_blanks);*/
if (head->header.isextended)
{
/* read in the list of extended headers
and translate them into the sparsearray
as before */
/* static */ int ind = SPARSE_IN_HDR;
for (;;)
{
exhdr = findrec ();
for (i = 0; i < SPARSE_EXT_HDR; i++)
{
if (i + ind > sp_array_size - 1)
{
/*
* realloc the scratch area
* since we've run out of room --
*/
sparsearray = (struct sp_array *)
ck_realloc (sparsearray,
2 * sp_array_size * (sizeof (struct sp_array)));
sp_array_size *= 2;
}
if (!exhdr->ext_hdr.sp[i].numbytes)
break;
sparsearray[i + ind].offset =
from_oct (1 + 12, exhdr->ext_hdr.sp[i].offset);
sparsearray[i + ind].numbytes =
from_oct (1 + 12, exhdr->ext_hdr.sp[i].numbytes);
}
if (!exhdr->ext_hdr.isextended)
break;
else
{
ind += SPARSE_EXT_HDR;
userec (exhdr);
}
}
userec (exhdr);
}
/* FALL THRU */
case LF_OLDNORMAL:
case LF_NORMAL:
case LF_CONTIG:
/*
* Appears to be a file.
* See if it's really a directory.
*/
namelen = strlen (skipcrud + current_file_name) - 1;
if (current_file_name[skipcrud + namelen] == '/')
goto really_dir;
/* FIXME, deal with protection issues */
again_file:
openflag = (f_keep ?
O_BINARY | O_NDELAY | O_WRONLY | O_CREAT | O_EXCL :
O_BINARY | O_NDELAY | O_WRONLY | O_CREAT | O_TRUNC)
| ((head->header.linkflag == LF_SPARSE) ? 0 : O_APPEND);
/*
* JK - The last | is a kludge to solve the problem
* the O_APPEND flag causes with files we are
* trying to make sparse: when a file is opened
* with O_APPEND, it writes to the last place
* that something was written, thereby ignoring
* any lseeks that we have done. We add this
* extra condition to make it able to lseek when
* a file is sparse, i.e., we don't open the new
* file with this flag. (Grump -- this bug caused
* me to waste a good deal of time, I might add)
*/
if (f_exstdout)
{
fd = 1;
goto extract_file;
}
if (f_unlink && !f_keep) {
if (unlink(skipcrud + current_file_name) == -1)
if (errno != ENOENT)
msg_perror ("Could not unlink %s",
skipcrud + current_file_name);
}
#ifdef O_CTG
/*
* Contiguous files (on the Masscomp) have to specify
* the size in the open call that creates them.
*/
if (head->header.linkflag == LF_CONTIG)
fd = open ((longname ? longname : head->header.name)
+ skipcrud,
openflag | O_CTG,
hstat.st_mode, hstat.st_size);
else
#endif
{
#ifdef NO_OPEN3
/*
* On raw V7 we won't let them specify -k (f_keep), but
* we just bull ahead and create the files.
*/
fd = creat ((longname
? longname
: head->header.name) + skipcrud,
hstat.st_mode);
#else
/*
* With 3-arg open(), we can do this up right.
*/
fd = open (skipcrud + current_file_name,
openflag, hstat.st_mode);
#endif
}
if (fd < 0)
{
if (make_dirs (skipcrud + current_file_name))
goto again_file;
msg_perror ("Could not create file %s",
skipcrud + current_file_name);
if (head->header.isextended)
skip_extended_headers ();
skip_file ((long) hstat.st_size);
goto quit;
}
extract_file:
if (head->header.linkflag == LF_SPARSE)
{
char *name;
int namelen;
/*
* Kludge alert. NAME is assigned to header.name
* because during the extraction, the space that
* contains the header will get scribbled on, and
* the name will get munged, so any error messages
* that happen to contain the filename will look
* REAL interesting unless we do this.
*/
namelen = strlen (skipcrud + current_file_name) + 1;
name = (char *) ck_malloc ((sizeof (char)) * namelen);
bcopy (skipcrud + current_file_name, name, namelen);
size = hstat.st_size;
extract_sparse_file (fd, &size, hstat.st_size, name);
}
else
for (size = hstat.st_size;
size > 0;
size -= written)
{
/* long offset,
numbytes;*/
if (f_multivol)
{
save_name = current_file_name;
save_totsize = hstat.st_size;
save_sizeleft = size;
}
/*
* Locate data, determine max length
* writeable, write it, record that
* we have used the data, then check
* if the write worked.
*/
data = findrec ()->charptr;
if (data == NULL)
{ /* Check it... */
msg ("Unexpected EOF on archive file");
break;
}
/*
* JK - If the file is sparse, use the sparsearray
* that we created before to lseek into the new
* file the proper amount, and to see how many
* bytes we want to write at that position.
*/
/* if (head->header.linkflag == LF_SPARSE) {
off_t pos;
pos = lseek(fd, (off_t) sparsearray[sparse_ind].offset, 0);
printf("%d at %d\n", (int) pos, sparse_ind);
written = sparsearray[sparse_ind++].numbytes;
} else*/
written = endofrecs ()->charptr - data;
if (written > size)
written = size;
errno = 0;
check = write (fd, data, written);
/*
* The following is in violation of strict
* typing, since the arg to userec
* should be a struct rec *. FIXME.
*/
userec ((union record *) (data + written - 1));
if (check == written)
continue;
/*
* Error in writing to file.
* Print it, skip to next file in archive.
*/
if (check < 0)
msg_perror ("couldn't write to file %s",
skipcrud + current_file_name);
else
msg ("could only write %d of %d bytes to file %s",
check, written, skipcrud + current_file_name);
skip_file ((long) (size - written));
break; /* Still do the close, mod time, chmod, etc */
}
if (f_multivol)
save_name = 0;
/* If writing to stdout, don't try to do anything
to the filename; it doesn't exist, or we don't
want to touch it anyway */
if (f_exstdout)
break;
/* if (head->header.isextended) {
register union record *exhdr;
register int i;
for (i = 0; i < 21; i++) {
long offset;
if (!exhdr->ext_hdr.sp[i].numbytes)
break;
offset = from_oct(1+12,
exhdr->ext_hdr.sp[i].offset);
written = from_oct(1+12,
exhdr->ext_hdr.sp[i].numbytes);
lseek(fd, offset, 0);
check = write(fd, data, written);
if (check == written) continue;
}
}*/
check = close (fd);
if (check < 0)
{
msg_perror ("Error while closing %s",
skipcrud + current_file_name);
}
set_filestat:
/*
* If we are root, set the owner and group of the extracted
* file. This does what is wanted both on real Unix and on
* System V. If we are running as a user, we extract as that
* user; if running as root, we extract as the original owner.
*/
if (we_are_root || f_do_chown)
{
if (chown (skipcrud + current_file_name,
hstat.st_uid, hstat.st_gid) < 0)
{
msg_perror ("cannot chown file %s to uid %d gid %d",
skipcrud + current_file_name,
hstat.st_uid, hstat.st_gid);
}
}
/*
* Set the modified time of the file.
*
* Note that we set the accessed time to "now", which
* is really "the time we started extracting files".
* unless f_gnudump is used, in which case .st_atime is used
*/
if (!f_modified)
{
/* fixme if f_gnudump should set ctime too, but how? */
if (f_gnudump)
acc_upd_times.actime = hstat.st_atime;
else
acc_upd_times.actime = now; /* Accessed now */
acc_upd_times.modtime = hstat.st_mtime; /* Mod'd */
if (utime (skipcrud + current_file_name,
&acc_upd_times) < 0)
{
msg_perror ("couldn't change access and modification times of %s", skipcrud + current_file_name);
}
}
/* We do the utime before the chmod because some versions of
utime are broken and trash the modes of the file. Since
we then change the mode anyway, we don't care. . . */
/*
* If '-k' is not set, open() or creat() could have saved
* the permission bits from a previously created file,
* ignoring the ones we specified.
* Even if -k is set, if the file has abnormal
* mode bits, we must chmod since writing or chown() has
* probably reset them.
*
* If -k is set, we know *we* created this file, so the mode
* bits were set by our open(). If the file is "normal", we
* skip the chmod. This works because we did umask(0) if -p
* is set, so umask will have left the specified mode alone.
*/
if ((!f_keep)
|| (hstat.st_mode & (S_ISUID | S_ISGID | S_ISVTX)))
{
if (chmod (skipcrud + current_file_name,
notumask & (int) hstat.st_mode) < 0)
{
msg_perror ("cannot change mode of file %s to 0%o",
skipcrud + current_file_name,
notumask & (int) hstat.st_mode);
}
}
quit:
break;
case LF_LINK:
again_link:
{
struct stat st1, st2;
if (f_unlink && !f_keep) {
if (unlink(skipcrud + current_file_name) == -1)
if (errno != ENOENT)
msg_perror ("Could not unlink %s",
skipcrud + current_file_name);
}
check = link (current_link_name, skipcrud + current_file_name);
if (check == 0)
break;
if (make_dirs (skipcrud + current_file_name))
goto again_link;
if (f_gnudump && errno == EEXIST)
break;
if (stat (current_link_name, &st1) == 0
&& stat (current_file_name + skipcrud, &st2) == 0
&& st1.st_dev == st2.st_dev
&& st1.st_ino == st2.st_ino)
break;
msg_perror ("Could not link %s to %s",
skipcrud + current_file_name,
current_link_name);
}
break;
#ifdef S_ISLNK
case LF_SYMLINK:
again_symlink:
if (f_unlink && !f_keep) {
if (unlink(skipcrud + current_file_name) == -1)
if (errno != ENOENT)
msg_perror ("Could not unlink %s",
skipcrud + current_file_name);
}
check = symlink (current_link_name,
skipcrud + current_file_name);
/* FIXME, don't worry uid, gid, etc... */
if (check == 0)
break;
if (make_dirs (current_file_name + skipcrud))
goto again_symlink;
msg_perror ("Could not create symlink to %s",
current_link_name);
break;
#endif
#ifdef S_IFCHR
case LF_CHR:
hstat.st_mode |= S_IFCHR;
goto make_node;
#endif
#ifdef S_IFBLK
case LF_BLK:
hstat.st_mode |= S_IFBLK;
#endif
#if defined(S_IFCHR) || defined(S_IFBLK)
make_node:
if (f_unlink && !f_keep) {
if (unlink(skipcrud + current_file_name) == -1)
if (errno != ENOENT)
msg_perror ("Could not unlink %s",
skipcrud + current_file_name);
}
check = mknod (current_file_name + skipcrud,
(int) hstat.st_mode, (int) hstat.st_rdev);
if (check != 0)
{
if (make_dirs (skipcrud + current_file_name))
goto make_node;
msg_perror ("Could not make %s",
current_file_name + skipcrud);
break;
};
goto set_filestat;
#endif
#ifdef S_ISFIFO
/* If local system doesn't support FIFOs, use default case */
case LF_FIFO:
make_fifo:
if (f_unlink && !f_keep) {
if (unlink(skipcrud + current_file_name) == -1)
if (errno != ENOENT)
msg_perror ("Could not unlink %s",
skipcrud + current_file_name);
}
check = mkfifo (current_file_name + skipcrud,
(int) hstat.st_mode);
if (check != 0)
{
if (make_dirs (current_file_name + skipcrud))
goto make_fifo;
msg_perror ("Could not make %s",
skipcrud + current_file_name);
break;
};
goto set_filestat;
#endif
case LF_DIR:
case LF_DUMPDIR:
namelen = strlen (current_file_name + skipcrud) - 1;
really_dir:
/* Check for trailing /, and zap as many as we find. */
while (namelen
&& current_file_name[skipcrud + namelen] == '/')
current_file_name[skipcrud + namelen--] = '\0';
if (f_gnudump)
{ /* Read the entry and delete files
that aren't listed in the archive */
gnu_restore (skipcrud);
}
else if (head->header.linkflag == LF_DUMPDIR)
skip_file ((long) (hstat.st_size));
again_dir:
check = mkdir (skipcrud + current_file_name,
(we_are_root ? 0 : 0300) | (int) hstat.st_mode);
if (check != 0)
{
struct stat st1;
if (make_dirs (skipcrud + current_file_name))
goto again_dir;
/* If we're trying to create '.', let it be. */
if (current_file_name[skipcrud + namelen] == '.' &&
(namelen == 0 ||
current_file_name[skipcrud + namelen - 1] == '/'))
goto check_perms;
if (errno == EEXIST
&& stat (skipcrud + current_file_name, &st1) == 0
&& (S_ISDIR (st1.st_mode)))
break;
msg_perror ("Could not create directory %s", skipcrud + current_file_name);
break;
}
check_perms:
if (!we_are_root && 0300 != (0300 & (int) hstat.st_mode))
{
hstat.st_mode |= 0300;
msg ("Added write and execute permission to directory %s",
skipcrud + current_file_name);
}
/*
* If we are root, set the owner and group of the extracted
* file. This does what is wanted both on real Unix and on
* System V. If we are running as a user, we extract as that
* user; if running as root, we extract as the original owner.
*/
if (we_are_root || f_do_chown)
{
if (chown (skipcrud + current_file_name,
hstat.st_uid, hstat.st_gid) < 0)
{
msg_perror ("cannot chown file %s to uid %d gid %d",
skipcrud + current_file_name,
hstat.st_uid, hstat.st_gid);
}
}
if (!f_modified)
{
tmp = ((struct saved_dir_info *)
ck_malloc (sizeof (struct saved_dir_info)));
tmp->path = (char *) ck_malloc (strlen (skipcrud
+ current_file_name) + 1);
strcpy (tmp->path, skipcrud + current_file_name);
tmp->mode = hstat.st_mode;
tmp->atime = hstat.st_atime;
tmp->mtime = hstat.st_mtime;
tmp->next = saved_dir_info_head;
saved_dir_info_head = tmp;
}
else
{
/* This functions exactly as the code for set_filestat above. */
if ((!f_keep)
|| (hstat.st_mode & (S_ISUID | S_ISGID | S_ISVTX)))
{
if (chmod (skipcrud + current_file_name,
notumask & (int) hstat.st_mode) < 0)
{
msg_perror ("cannot change mode of file %s to 0%o",
skipcrud + current_file_name,
notumask & (int) hstat.st_mode);
}
}
}
break;
case LF_VOLHDR:
if (f_verbose)
{
printf ("Reading %s\n", current_file_name);
}
break;
case LF_NAMES:
extract_mangle (head);
break;
case LF_MULTIVOL:
msg ("Can't extract '%s'--file is continued from another volume\n", current_file_name);
skip_file ((long) hstat.st_size);
break;
case LF_LONGNAME:
case LF_LONGLINK:
msg ("Visible long name error\n");
skip_file ((long) hstat.st_size);
break;
}
/* We don't need to save it any longer. */
saverec ((union record **) 0);/* Unsave it */
}
