struct vfs_s_entry *
vfs_s_generate_entry (struct vfs_class *me, const char *name, struct vfs_s_inode *parent, mode_t mode)
{
struct vfs_s_inode *inode;
struct stat *st;
st = vfs_s_default_stat (me, mode);
inode = vfs_s_new_inode (me, parent->super, st);
return vfs_s_new_entry (me, name, inode);
}
/* @Before */
static void
setup (void)
{
static struct stat initstat;
str_init_strings (NULL);
vfs_init ();
init_localfs ();
vfs_setup_work_dir ();
test_subclass1.flags = VFS_S_REMOTE;
vfs_s_init_class (&vfs_test_ops1, &test_subclass1);
vfs_test_ops1.name = "testfs1";
vfs_test_ops1.flags = VFSF_NOLINKS;
vfs_test_ops1.prefix = "test1:";
vfs_register_class (&vfs_test_ops1);
vfs_test_super = g_new0 (struct vfs_s_super, 1);
vfs_test_super->me = &vfs_test_ops1;
vfs_root_inode = vfs_s_new_inode (&vfs_test_ops1, vfs_test_super, &initstat);
vfs_root_entry = vfs_s_new_entry (&vfs_test_ops1, "/", vfs_root_inode);
}
static struct vfs_s_entry *
vfs_s_find_entry_linear (struct vfs_class *me, struct vfs_s_inode *root,
const char *a_path, int follow, int flags)
{
struct vfs_s_entry *ent = NULL;
char * const path = g_strdup (a_path);
struct vfs_s_entry *retval = NULL;
if (root->super->root != root)
vfs_die ("We have to use _real_ root. Always. Sorry.");
canonicalize_pathname (path);
if (!(flags & FL_DIR)) {
char *dirname, *name, *save;
struct vfs_s_inode *ino;
split_dir_name (me, path, &dirname, &name, &save);
ino =
vfs_s_find_inode (me, root->super, dirname, follow,
flags | FL_DIR);
if (save)
*save = PATH_SEP;
retval = vfs_s_find_entry_tree (me, ino, name, follow, flags);
g_free (path);
return retval;
}
for (ent = root->subdir; ent != NULL; ent = ent->next)
if (!strcmp (ent->name, path))
break;
if (ent && (!(MEDATA->dir_uptodate) (me, ent->ino))) {
#if 1
print_vfs_message (_("Directory cache expired for %s"), path);
#endif
vfs_s_free_entry (me, ent);
ent = NULL;
}
if (!ent) {
struct vfs_s_inode *ino;
ino =
vfs_s_new_inode (me, root->super,
vfs_s_default_stat (me, S_IFDIR | 0755));
ent = vfs_s_new_entry (me, path, ino);
if ((MEDATA->dir_load) (me, ino, path) == -1) {
vfs_s_free_entry (me, ent);
g_free (path);
return NULL;
}
vfs_s_insert_entry (me, root, ent);
for (ent = root->subdir; ent != NULL; ent = ent->next)
if (!strcmp (ent->name, path))
break;
}
if (!ent)
vfs_die ("find_linear: success but directory is not there\n");
#if 0
if (!vfs_s_resolve_symlink (me, ent, follow)) {
g_free (path);
return NULL;
}
#endif
g_free (path);
return ent;
}
/*
* Return 1 for success, 0 if the checksum is bad, EOF on eof,
* 2 for a record full of zeros (EOF marker).
*
*/
static int read_header (vfs *me, vfs_s_super *archive, int tard)
{
register int i;
register long sum, signed_sum, recsum;
register char *p;
register union record *header;
char **longp;
char *bp, *data;
int size, written;
static char *next_long_name = NULL, *next_long_link = NULL;
char *current_file_name, *current_link_name;
recurse:
header = get_next_record (archive, tard);
if (NULL == header)
return EOF;
recsum = from_oct (8, header->header.chksum);
sum = 0; signed_sum = 0;
p = header->charptr;
for (i = sizeof (*header); --i >= 0;) {
/*
* We can't use unsigned char here because of old compilers,
* e.g. V7.
*/
signed_sum += *p;
sum += 0xFF & *p++;
}
/* Adjust checksum to count the "chksum" field as blanks. */
for (i = sizeof (header->header.chksum); --i >= 0;) {
sum -= 0xFF & header->header.chksum[i];
signed_sum -= (char) header->header.chksum[i];
}
sum += ' ' * sizeof header->header.chksum;
signed_sum += ' ' * sizeof header->header.chksum;
if (sum == 8 * ' ') {
/*
* This is a zeroed record...whole record is 0's except
* for the 8 blanks we faked for the checksum field.
*/
return 2;
}
if (sum != recsum && signed_sum != recsum)
return 0;
/*
* linkflag on BSDI tar (pax) always '\000'
*/
if(header->header.linkflag == '\000' &&
strlen(header->header.arch_name) &&
header->header.arch_name[strlen(header->header.arch_name) - 1] == '/')
header->header.linkflag = LF_DIR;
/*
* Good record. Decode file size and return.
*/
if (header->header.linkflag == LF_LINK || header->header.linkflag == LF_DIR)
hstat.st_size = 0; /* Links 0 size on tape */
else
hstat.st_size = from_oct (1 + 12, header->header.size);
header->header.arch_name[NAMSIZ - 1] = '\0';
if (header->header.linkflag == LF_LONGNAME
|| header->header.linkflag == LF_LONGLINK) {
longp = ((header->header.linkflag == LF_LONGNAME)
? &next_long_name
: &next_long_link);
if (*longp)
free (*longp);
bp = *longp = (char *) xmalloc (hstat.st_size, "Tar: Long name");
for (size = hstat.st_size;
size > 0;
size -= written) {
data = get_next_record (archive, tard)->charptr;
if (data == NULL) {
message_1s (1, MSG_ERROR, _("Unexpected EOF on archive file"));
return 0;
}
written = RECORDSIZE;
if (written > size)
written = size;
bcopy (data, bp, written);
bp += written;
}
#if 0
if (hstat.st_size > 1)
bp [hstat.st_size - 1] = 0; /* just to make sure */
#endif
goto recurse;
} else {
struct stat st;
struct vfs_s_entry *entry;
struct vfs_s_inode *inode, *parent;
long data_position;
char *p, *q;
int len;
int isdir = 0;
current_file_name = (next_long_name
? next_long_name
: strdup (header->header.arch_name));
len = strlen (current_file_name);
if (current_file_name[len - 1] == '/') {
current_file_name[len - 1] = 0;
isdir = 1;
}
current_link_name = (next_long_link
? next_long_link
: strdup (header->header.arch_linkname));
len = strlen (current_link_name);
if (len && current_link_name [len - 1] == '/')
current_link_name[len - 1] = 0;
next_long_link = next_long_name = NULL;
data_position = current_tar_position;
p = strrchr (current_file_name, '/');
if (p == NULL) {
p = current_file_name;
q = current_file_name + strlen (current_file_name); /* "" */
} else {
*(p++) = 0;
q = current_file_name;
}
parent = vfs_s_find_inode (me, archive->root, q, LINK_NO_FOLLOW, FL_MKDIR);
if (parent == NULL) {
message_1s (1, MSG_ERROR, _("Inconsistent tar archive"));
return 0;
}
if (header->header.linkflag == LF_LINK) {
parent = vfs_s_find_inode (me, archive->root, current_link_name, LINK_NO_FOLLOW, 0);
if (parent == NULL) {
message_1s (1, MSG_ERROR, _("Inconsistent tar archive"));
} else {
inode = parent;
entry = vfs_s_new_entry(me, p, inode);
vfs_s_insert_entry(me, parent, entry);
free (current_link_name);
goto done;
}
}
fill_stat_from_header (me, &st, header);
inode = vfs_s_new_inode (me, archive, &st);
inode->u.tar.data_offset = data_position;
if (*current_link_name)
inode->linkname = current_link_name;
entry = vfs_s_new_entry (me, p, inode);
vfs_s_insert_entry (me, parent, entry);
free (current_file_name);
done:
if (header->header.isextended) {
while (get_next_record (archive, tard)->ext_hdr.isextended);
inode->u.tar.data_offset = current_tar_position;
}
return 1;
}
}
