/* skip regfile */
int
tar_skip_regfile(TAR *t)
{
int i, k;
size_t size;
char buf[T_BLOCKSIZE];
if (!TH_ISREG(t))
{
errno = EINVAL;
return -1;
}
size = th_get_size(t);
for (i = size; i > 0; i -= T_BLOCKSIZE)
{
k = tar_block_read(t, buf);
if (k != T_BLOCKSIZE)
{
if (k != -1)
errno = EINVAL;
return -1;
}
}
return 0;
}
/* read a header block */
int
th_read_internal(TAR *t)
{
int i;
int num_zero_blocks = 0;
#ifdef DEBUG
printf("==> th_read_internal(TAR=\"%s\")\n", t->pathname);
#endif
while ((i = tar_block_read(t, &(t->th_buf))) == T_BLOCKSIZE)
{
/* two all-zero blocks mark EOF */
if (t->th_buf.name[0] == '\0')
{
num_zero_blocks++;
if (!BIT_ISSET(t->options, TAR_IGNORE_EOT)
&& num_zero_blocks >= 2)
return 0; /* EOF */
else
continue;
}
/* verify magic and version */
if (BIT_ISSET(t->options, TAR_CHECK_MAGIC)
&& strncmp(t->th_buf.magic, TMAGIC, TMAGLEN - 1) != 0)
{
#ifdef DEBUG
puts("!!! unknown magic value in tar header");
#endif
return -2;
}
if (BIT_ISSET(t->options, TAR_CHECK_VERSION)
&& strncmp(t->th_buf.version, TVERSION, TVERSLEN) != 0)
{
#ifdef DEBUG
puts("!!! unknown version value in tar header");
#endif
return -2;
}
/* check chksum */
if (!BIT_ISSET(t->options, TAR_IGNORE_CRC)
&& !th_crc_ok(t))
{
#ifdef DEBUG
puts("!!! tar header checksum error");
#endif
return -2;
}
break;
}
#ifdef DEBUG
printf("<== th_read_internal(): returning %d\n", i);
#endif
return i;
}
/* extract regular file */
int
tar_extract_regfile(TAR *t, char *realname)
{
mode_t mode;
size_t size;
uid_t uid;
gid_t gid;
int fdout;
int i, k;
char buf[T_BLOCKSIZE];
char *filename;
#ifdef DEBUG
printf("==> tar_extract_regfile(t=0x%lx, realname=\"%s\")\n", t,
realname);
#endif
if (!TH_ISREG(t))
{
errno = EINVAL;
return -1;
}
filename = (realname ? realname : th_get_pathname(t));
mode = th_get_mode(t);
size = th_get_size(t);
uid = th_get_uid(t);
gid = th_get_gid(t);
if (mkdirhier(dirname(filename)) == -1)
return -1;
#ifdef DEBUG
printf(" ==> extracting: %s (mode %04o, uid %d, gid %d, %d bytes)\n",
filename, mode, uid, gid, size);
#endif
fdout = open(filename, O_WRONLY | O_CREAT | O_TRUNC
#ifdef O_BINARY
| O_BINARY
#endif
, 0666);
if (fdout == -1)
{
#ifdef DEBUG
perror("open()");
#endif
return -1;
}
#if 0
/* change the owner. (will only work if run as root) */
if (fchown(fdout, uid, gid) == -1 && errno != EPERM)
{
#ifdef DEBUG
perror("fchown()");
#endif
return -1;
}
/* make sure the mode isn't inheritted from a file we're overwriting */
if (fchmod(fdout, mode & 07777) == -1)
{
#ifdef DEBUG
perror("fchmod()");
#endif
return -1;
}
#endif
/* extract the file */
for (i = size; i > 0; i -= T_BLOCKSIZE)
{
k = tar_block_read(t, buf);
if (k != T_BLOCKSIZE)
{
if (k != -1)
errno = EINVAL;
return -1;
}
/* write block to output file */
if (write(fdout, buf,
((i > T_BLOCKSIZE) ? T_BLOCKSIZE : i)) == -1)
return -1;
}
/* close output file */
if (close(fdout) == -1)
return -1;
#ifdef DEBUG
printf("### done extracting %s\n", filename);
#endif
return 0;
}
/* wrapper function for th_read_internal() to handle GNU extensions */
int
th_read(TAR *t)
{
int i, j;
size_t sz;
char *ptr;
#ifdef DEBUG
printf("==> th_read(t=0x%lx)\n", t);
#endif
if (t->th_buf.gnu_longname != NULL)
free(t->th_buf.gnu_longname);
if (t->th_buf.gnu_longlink != NULL)
free(t->th_buf.gnu_longlink);
memset(&(t->th_buf), 0, sizeof(struct tar_header));
i = th_read_internal(t);
if (i == 0)
return 1;
else if (i != T_BLOCKSIZE)
{
if (i != -1)
errno = EINVAL;
return -1;
}
/* check for GNU long link extention */
if (TH_ISLONGLINK(t))
{
sz = th_get_size(t);
j = (sz / T_BLOCKSIZE) + (sz % T_BLOCKSIZE ? 1 : 0);
#ifdef DEBUG
printf(" th_read(): GNU long linkname detected "
"(%ld bytes, %d blocks)\n", sz, j);
#endif
t->th_buf.gnu_longlink = (char *)malloc(j * T_BLOCKSIZE);
if (t->th_buf.gnu_longlink == NULL)
return -1;
for (ptr = t->th_buf.gnu_longlink; j > 0;
j--, ptr += T_BLOCKSIZE)
{
#ifdef DEBUG
printf(" th_read(): reading long linkname "
"(%d blocks left, ptr == %ld)\n", j, ptr);
#endif
i = tar_block_read(t, ptr);
if (i != T_BLOCKSIZE)
{
if (i != -1)
errno = EINVAL;
return -1;
}
#ifdef DEBUG
printf(" th_read(): read block == \"%s\"\n", ptr);
#endif
}
#ifdef DEBUG
printf(" th_read(): t->th_buf.gnu_longlink == \"%s\"\n",
t->th_buf.gnu_longlink);
#endif
i = th_read_internal(t);
if (i != T_BLOCKSIZE)
{
if (i != -1)
errno = EINVAL;
return -1;
}
}
/* check for GNU long name extention */
if (TH_ISLONGNAME(t))
{
sz = th_get_size(t);
j = (sz / T_BLOCKSIZE) + (sz % T_BLOCKSIZE ? 1 : 0);
#ifdef DEBUG
printf(" th_read(): GNU long filename detected "
"(%ld bytes, %d blocks)\n", sz, j);
#endif
t->th_buf.gnu_longname = (char *)malloc(j * T_BLOCKSIZE);
if (t->th_buf.gnu_longname == NULL)
return -1;
for (ptr = t->th_buf.gnu_longname; j > 0;
j--, ptr += T_BLOCKSIZE)
{
#ifdef DEBUG
printf(" th_read(): reading long filename "
"(%d blocks left, ptr == %ld)\n", j, ptr);
#endif
i = tar_block_read(t, ptr);
if (i != T_BLOCKSIZE)
{
if (i != -1)
errno = EINVAL;
return -1;
}
#ifdef DEBUG
printf(" th_read(): read block == \"%s\"\n", ptr);
#endif
}
#ifdef DEBUG
printf(" th_read(): t->th_buf.gnu_longname == \"%s\"\n",
t->th_buf.gnu_longname);
#endif
i = th_read_internal(t);
if (i != T_BLOCKSIZE)
{
if (i != -1)
errno = EINVAL;
return -1;
}
}
#if 0
/*
** work-around for old archive files with broken typeflag fields
** NOTE: I fixed this in the TH_IS*() macros instead
*/
/*
** (directories are signified with a trailing '/')
*/
if (t->th_buf.typeflag == AREGTYPE
&& t->th_buf.name[strlen(t->th_buf.name) - 1] == '/')
t->th_buf.typeflag = DIRTYPE;
/*
** fallback to using mode bits
*/
if (t->th_buf.typeflag == AREGTYPE)
{
mode = (mode_t)oct_to_int(t->th_buf.mode);
if (S_ISREG(mode))
t->th_buf.typeflag = REGTYPE;
else if (S_ISDIR(mode))
t->th_buf.typeflag = DIRTYPE;
else if (S_ISFIFO(mode))
t->th_buf.typeflag = FIFOTYPE;
else if (S_ISCHR(mode))
t->th_buf.typeflag = CHRTYPE;
else if (S_ISBLK(mode))
t->th_buf.typeflag = BLKTYPE;
else if (S_ISLNK(mode))
t->th_buf.typeflag = SYMTYPE;
}
#endif
return 0;
}
static int sandbox_attr(void *fpctx,void *handle,const char *attr,glite_jp_attrval_t **attrval)
{
glite_jp_error_t err;
glite_jp_context_t ctx = fpctx;
glite_jp_attrval_t *out = NULL;
int i,nout = 0, count = 0;
sb_handle *h = handle;
printf("sandbox_attr() called\n");
memset(&err,0,sizeof err);
err.source = __FUNCTION__;
glite_jp_clear_error(ctx);
*attrval = NULL;
if (!strcmp(attr, GLITE_JP_ATTR_ISB_FILENAME)) {
while ((i = th_read(h->t)) == 0)
{
printf("-- %s\n", th_get_pathname(h->t));
if ( !(count % ALLOC_CHUNK) ) {
*attrval = realloc(*attrval, (count + ALLOC_CHUNK + 1) * sizeof(**attrval) );
memset( (*attrval) + count, 0, (ALLOC_CHUNK + 1) * sizeof(**attrval));
}
(*attrval)[count].name = strdup(GLITE_JP_ATTR_ISB_FILENAME);
(*attrval)[count].value = strdup(th_get_pathname(h->t));
(*attrval)[count].origin = GLITE_JP_ATTR_ORIG_FILE;
(*attrval)[count].timestamp = th_get_mtime(h->t);
count++;
if (TH_ISREG(h->t) && tar_skip_regfile(h->t) != 0)
{
err.code = EIO;
err.desc = "tar_skip_regfile";
return glite_jp_stack_error(ctx,&err);
}
}
}
else if (!strcmp(attr, GLITE_JP_ATTR_OSB_FILENAME)) {
printf("Namespace %s not implemented yet\n", GLITE_JP_ATTR_OSB_FILENAME);
}
else if (strstr(attr,GLITE_JP_OSB_CONTENT_NS)) {
printf("Namespace %s not implemented yet\n", GLITE_JP_OSB_CONTENT_NS);
}
else if (strstr(attr,GLITE_JP_ISB_CONTENT_NS)) {
char *fileName = (char *) attr + sizeof(GLITE_JP_ISB_CONTENT_NS);
printf("untaring file: %s\n", fileName);
while (th_read(h->t) == 0)
{
if ( !strcmp(fileName, th_get_pathname(h->t)) ) {
/* extract the file */
int k;
size_t size;
char buf[T_BLOCKSIZE];
char *value;
if (!TH_ISREG(h->t)) assert(0); // not a regular file
size = th_get_size(h->t);
value = (char *) malloc(size * sizeof(char) + 1);
memset( value, 0, size * sizeof(char) + 1);
for (i = 0; i < size; i += T_BLOCKSIZE)
{
k = tar_block_read(h->t, buf);
if (k == -1)
{
err.code = errno;
err.desc = "tar_block_read";
return glite_jp_stack_error(ctx,&err);
}
// tar_block_read calls glite_jppsbe_pread, which usually
// returns whole block (read from the middle of uploaded
// tar file
// so cut k in order to the last chunk had correct size
if (i + T_BLOCKSIZE > size) {
k = size - i;
}
strncpy(value + i, buf, k);
}
*attrval = malloc(2 * sizeof(**attrval) );
memset( (*attrval), 0, 2 * sizeof(**attrval));
(*attrval)[0].name = strdup(attr);
(*attrval)[0].value = value;
(*attrval)[0].origin = GLITE_JP_ATTR_ORIG_FILE;
(*attrval)[0].timestamp = th_get_mtime(h->t);
}
else if (TH_ISREG(h->t) && tar_skip_regfile(h->t) != 0)
{
err.code = EIO;
err.desc = "tar_skip_regfile";
return glite_jp_stack_error(ctx,&err);
}
}
}
return glite_jp_stack_error(ctx,&err);
}
