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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-04 12:43:57 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-04 13:42:06 +0200
commit6623b1fe4df1e2fceb27eff286a86cf36809b2bc (patch)
tree95dce50157ca3f79e3fdcfae901a124660f20e93 /lib/tar/read_header.c
parent56c1be44b5f77b067994a6f8f6ef2b397d7acadc (diff)
libtar: add support for xattr extensions
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/tar/read_header.c')
-rw-r--r--lib/tar/read_header.c52
1 files changed, 51 insertions, 1 deletions
diff --git a/lib/tar/read_header.c b/lib/tar/read_header.c
index db40d7d..94c4a69 100644
--- a/lib/tar/read_header.c
+++ b/lib/tar/read_header.c
@@ -60,12 +60,29 @@ fail:
return NULL;
}
+static tar_xattr_t *mkxattr(const char *key, size_t keylen,
+ const char *value, size_t valuelen)
+{
+ tar_xattr_t *xattr;
+
+ xattr = calloc(1, sizeof(*xattr) + keylen + 1 + valuelen + 1);
+ if (xattr == NULL)
+ return NULL;
+
+ xattr->key = xattr->data;
+ xattr->value = xattr->data + keylen + 1;
+ memcpy(xattr->key, key, keylen);
+ memcpy(xattr->value, value, valuelen);
+ return xattr;
+}
+
static int read_pax_header(int fd, uint64_t entsize, unsigned int *set_by_pax,
tar_header_decoded_t *out)
{
sparse_map_t *sparse_last = NULL, *sparse;
uint64_t field, offset = 0, num_bytes = 0;
- char *buffer, *line;
+ char *buffer, *line, *key, *ptr, *value;
+ tar_xattr_t *xattr;
uint64_t i;
buffer = record_to_memory(fd, entsize);
@@ -183,6 +200,39 @@ static int read_pax_header(int fd, uint64_t entsize, unsigned int *set_by_pax,
sparse_last->next = sparse;
sparse_last = sparse;
}
+ } else if (!strncmp(line, "SCHILY.xattr.", 13)) {
+ key = line + 13;
+
+ ptr = strrchr(key, '=');
+ if (ptr == NULL || ptr == key)
+ continue;
+
+ value = ptr + 1;
+
+ xattr = mkxattr(key, ptr - key, value, strlen(value));
+ if (xattr == NULL)
+ goto fail_errno;
+
+ xattr->next = out->xattr;
+ out->xattr = xattr;
+ } else if (!strncmp(line, "LIBARCHIVE.xattr.", 17)) {
+ key = line + 17;
+
+ ptr = strrchr(key, '=');
+ if (ptr == NULL || ptr == key)
+ continue;
+
+ value = ptr + 1;
+
+ xattr = mkxattr(key, ptr - key, value, strlen(value));
+ if (xattr == NULL)
+ goto fail_errno;
+
+ urldecode(xattr->key);
+ base64_decode((uint8_t *)xattr->value, value);
+
+ xattr->next = out->xattr;
+ out->xattr = xattr;
}
}