char *dir = NULL;
char *base = NULL;
char pidbuf[UINTMAX_STRSIZE_BOUND];
- char const *pptr;
+ char const *pptr = NULL;
char nbuf[UINTMAX_STRSIZE_BOUND];
char const *nptr = NULL;
break;
case 'n':
- if (nptr)
- {
- q = stpcpy (q, nptr);
- p += 2;
- break;
- }
- /* else fall through */
+ q = stpcpy (q, nptr);
+ p += 2;
+ break;
+
default:
*q++ = *p++;
}
}
-void xheader_xattr_init (struct tar_stat_info *st)
+void
+xheader_xattr_init (struct tar_stat_info *st)
{
st->xattr_map = NULL;
st->xattr_map_size = 0;
st->acls_a_len = 0;
st->acls_d_ptr = NULL;
st->acls_d_len = 0;
+ st->cntx_name = NULL;
}
-void xheader_xattr_free (struct xattr_array *xattr_map, size_t xattr_map_size)
+void
+xheader_xattr_free (struct xattr_array *xattr_map, size_t xattr_map_size)
{
size_t scan = 0;
free (xattr_map);
}
-static void xheader_xattr__add (struct xattr_array **xattr_map,
- size_t *xattr_map_size,
- const char *key, const char *val, size_t len)
+static void
+xheader_xattr__add (struct xattr_array **xattr_map,
+ size_t *xattr_map_size,
+ const char *key, const char *val, size_t len)
{
size_t pos = (*xattr_map_size)++;
(*xattr_map)[pos].xval_len = len;
}
-void xheader_xattr_add(struct tar_stat_info *st,
- const char *key, const char *val, size_t len)
+/* This is reversal function for xattr_encode_keyword. See comment for
+ xattr_encode_keyword() for more info. */
+static void
+xattr_decode_keyword (char *keyword)
+{
+ char *kpr, *kpl; /* keyword pointer left/right */
+ kpr = kpl = keyword;
+
+ for (;;)
+ {
+ if (*kpr == '%')
+ {
+ if (kpr[1] == '3' && kpr[2] == 'D')
+ {
+ *kpl = '=';
+ kpr += 3;
+ kpl ++;
+ continue;
+ }
+ else if (kpr[1] == '2' && kpr[2] == '5')
+ {
+ *kpl = '%';
+ kpr += 3;
+ kpl ++;
+ continue;
+ }
+ }
+
+ *kpl = *kpr;
+
+ if (*kpr == 0)
+ break;
+
+ kpr++;
+ kpl++;
+ }
+}
+
+void
+xheader_xattr_add (struct tar_stat_info *st,
+ const char *key, const char *val, size_t len)
{
size_t klen = strlen (key);
char *xkey = xmalloc (strlen("SCHILY.xattr.") + klen + 1);
free (xkey);
}
-void xheader_xattr_copy(const struct tar_stat_info *st,
- struct xattr_array **xattr_map, size_t *xattr_map_size)
+void
+xheader_xattr_copy (const struct tar_stat_info *st,
+ struct xattr_array **xattr_map, size_t *xattr_map_size)
{
size_t scan = 0;
while (size > 0);
}
+/* xattr_encode_keyword() substitutes '=' ~~> '%3D' and '%' ~~> '%25'
+ in extended attribute keywords. This is needed because the '=' character
+ has special purpose in extended attribute header - it splits keyword and
+ value part of header. If there was the '=' occurrence allowed inside
+ keyword, there would be no unambiguous way how to decode this extended
+ attribute.
+
+ (http://lists.gnu.org/archive/html/bug-tar/2012-10/msg00017.html)
+ */
+static char *
+xattr_encode_keyword(const char *keyword)
+{
+ static char *encode_buffer = NULL;
+ static size_t encode_buffer_size = 0;
+ size_t bp; /* keyword/buffer pointers */
+
+ if (!encode_buffer)
+ {
+ encode_buffer_size = 256;
+ encode_buffer = xmalloc (encode_buffer_size);
+ }
+ else
+ *encode_buffer = 0;
+
+ for (bp = 0; *keyword != 0; ++bp, ++keyword)
+ {
+ char c = *keyword;
+
+ if (bp + 2 /* enough for URL encoding also.. */ >= encode_buffer_size)
+ {
+ encode_buffer = x2realloc (encode_buffer, &encode_buffer_size);
+ }
+
+ if (c == '%')
+ {
+ strcpy (encode_buffer + bp, "%25");
+ bp += 2;
+ }
+ else if (c == '=')
+ {
+ strcpy (encode_buffer + bp, "%3D");
+ bp += 2;
+ }
+ else
+ encode_buffer[bp] = c;
+ }
+
+ encode_buffer[bp] = 0;
+
+ return encode_buffer;
+}
+
static void
xheader_print_n (struct xheader *xhdr, char const *keyword,
char const *value, size_t vsize)
{
- size_t len = strlen (keyword) + vsize + 3; /* ' ' + '=' + '\n' */
size_t p;
size_t n = 0;
char nbuf[UINTMAX_STRSIZE_BOUND];
char const *np;
+ size_t len, klen;
+
+ keyword = xattr_encode_keyword (keyword);
+ klen = strlen (keyword);
+ len = klen + vsize + 3; /* ' ' + '=' + '\n' */
do
{
x_obstack_grow (xhdr, np, n);
x_obstack_1grow (xhdr, ' ');
- x_obstack_grow (xhdr, keyword, strlen (keyword));
+ x_obstack_grow (xhdr, keyword, klen);
x_obstack_1grow (xhdr, '=');
x_obstack_grow (xhdr, value, vsize);
x_obstack_1grow (xhdr, '\n');
return true;
}
-
-
static void
code_num (uintmax_t value, char const *keyword, struct xheader *xhdr)
{
decode_string (&continued_file_name, arg);
}
+static void
+xattr_selinux_coder (struct tar_stat_info const *st, char const *keyword,
+ struct xheader *xhdr, void const *data)
+{
+ code_string (st->cntx_name, keyword, xhdr);
+}
+
+static void
+xattr_selinux_decoder (struct tar_stat_info *st,
+ char const *keyword, char const *arg, size_t size)
+{
+ decode_string (&st->cntx_name, arg);
+}
+
static void
xattr_acls_a_coder (struct tar_stat_info const *st , char const *keyword,
struct xheader *xhdr, void const *data)
xattr_decoder (struct tar_stat_info *st,
char const *keyword, char const *arg, size_t size)
{
- char *xstr = NULL;
+ char *xstr, *xkey;
+
+ /* copy keyword */
+ size_t klen_raw = strlen (keyword);
+ xkey = alloca (klen_raw + 1);
+ memcpy (xkey, keyword, klen_raw + 1) /* including null-terminating */;
+
+ /* copy value */
+ xstr = alloca (size + 1);
+ memcpy (xstr, arg, size + 1); /* separator included, for GNU tar '\n' */;
- xstr = xmemdup(arg, size + 1);
- xheader_xattr_add(st, keyword + strlen("SCHILY.xattr."), xstr, size);
- free(xstr);
+ xattr_decode_keyword (xkey);
+
+ xheader_xattr_add (st, xkey + strlen("SCHILY.xattr."), xstr, size);
}
static void
{ "GNU.volume.offset", volume_offset_coder, volume_offset_decoder,
XHDR_PROTECTED | XHDR_GLOBAL, false },
+ /* We get the SELinux value from filecon, so add a namespace for SELinux
+ instead of storing it in SCHILY.xattr.* (which would be RAW). */
+ { "RHT.security.selinux",
+ xattr_selinux_coder, xattr_selinux_decoder, 0, false },
+
/* ACLs, use the star format... */
{ "SCHILY.acl.access",
xattr_acls_a_coder, xattr_acls_a_decoder, 0, false },
projects / chaz / tar / blobdiff