*/
/*
- * Copyright (C) 2012 Eric Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
/*
* Find the symlink target of a symbolic link or junction point in the WIM.
*
- * See http://msdn.microsoft.com/en-us/library/cc232006(v=prot.10).aspx
- * Except the first 8 bytes aren't included in the resource (presumably because
- * we already know the reparse tag from the dentry, and we already know the
- * reparse tag len from the lookup table entry resource length).
+ * See http://msdn.microsoft.com/en-us/library/cc232006(v=prot.10).aspx for a
+ * description of the format of the so-called "reparse point data buffers".
+ *
+ * But, in the WIM format, the first 8 bytes of the reparse point data buffer
+ * are omitted, presumably because we already know the reparse tag from the
+ * dentry, and we already know the reparse tag length from the lookup table
+ * entry resource length.
*/
-static ssize_t get_symlink_name(const u8 *resource, size_t resource_len,
- char *buf, size_t buf_len,
- u32 reparse_tag)
+static ssize_t
+get_symlink_name(const void *resource, size_t resource_len, mbchar *buf,
+ size_t buf_len, u32 reparse_tag)
{
const u8 *p = resource;
u16 substitute_name_offset;
u16 substitute_name_len;
u16 print_name_offset;
u16 print_name_len;
- char *link_target;
+ mbchar *link_target;
size_t link_target_len;
ssize_t ret;
unsigned header_size;
- char *translated_target;
+ mbchar *translated_target;
bool is_absolute;
u32 flags;
wimlib_assert(reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT);
- /* I think that some junction points incorrectly get marked as symbolic
- * links. So, parse the link buffer as a symlink if the flags seem
- * plausible. */
- if (flags <= 1)
- reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
-
if (reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT) {
header_size = 8;
} else {
if (header_size + substitute_name_offset + substitute_name_len > resource_len)
return -EIO;
- ret = utf16_to_utf8((const char *)p + substitute_name_offset,
+ ret = utf16le_to_mbs((const utf16lechar*)(p + substitute_name_offset),
substitute_name_len,
&link_target, &link_target_len);
if (ret == WIMLIB_ERR_INVALID_UTF16_STRING)
return ret;
}
-static int make_symlink_reparse_data_buf(const char *symlink_target,
- size_t *len_ret, void **buf_ret)
+static int
+make_symlink_reparse_data_buf(const mbchar *symlink_target,
+ size_t *len_ret, void **buf_ret)
{
- size_t utf8_len = strlen(symlink_target);
- char *name_utf16;
- size_t utf16_len;
+ utf16lechar *name_utf16le;
+ size_t name_utf16le_nbytes;
int ret;
- ret = utf8_to_utf16(symlink_target, utf8_len,
- &name_utf16, &utf16_len);
+ ret = mbs_to_utf16le(symlink_target, strlen(symlink_target),
+ &name_utf16le, &name_utf16le_nbytes);
if (ret != 0)
return ret;
- for (size_t i = 0; i < utf16_len / 2; i++)
- if (((u16*)name_utf16)[i] == cpu_to_le16('/'))
- ((u16*)name_utf16)[i] = cpu_to_le16('\\');
- size_t len = 12 + utf16_len * 2;
+ for (size_t i = 0; i < name_utf16le_nbytes / 2; i++)
+ if (name_utf16le[i] == cpu_to_le16('/'))
+ name_utf16le[i] = cpu_to_le16('\\');
+
+ size_t len = 12 + name_utf16le_nbytes * 2;
void *buf = MALLOC(len);
if (buf) {
u8 *p = buf;
- p = put_u16(p, utf16_len); /* Substitute name offset */
- p = put_u16(p, utf16_len); /* Substitute name length */
+ p = put_u16(p, name_utf16le_nbytes); /* Substitute name offset */
+ p = put_u16(p, name_utf16le_nbytes); /* Substitute name length */
p = put_u16(p, 0); /* Print name offset */
- p = put_u16(p, utf16_len); /* Print name length */
+ p = put_u16(p, name_utf16le_nbytes); /* Print name length */
p = put_u32(p, 1); /* flags: 0 iff *full* target, including drive letter??? */
- p = put_bytes(p, utf16_len, (const u8*)name_utf16);
- p = put_bytes(p, utf16_len, (const u8*)name_utf16);
+ p = put_bytes(p, name_utf16le_nbytes, name_utf16le);
+ p = put_bytes(p, name_utf16le_nbytes, name_utf16le);
*len_ret = len;
*buf_ret = buf;
ret = 0;
} else {
ret = WIMLIB_ERR_NOMEM;
}
- FREE(name_utf16);
+ FREE(name_utf16le);
return ret;
}
-/* Get the symlink target from a dentry.
+/* Get the symlink target from a WIM inode.
*
- * The dentry may be either "real" symlink or a junction point.
+ * The inode may be either a "real" symlink (reparse tag
+ * WIM_IO_REPARSE_TAG_SYMLINK), or it may be a junction point (reparse tag
+ * WIM_IO_REPARSE_TAG_MOUNT_POINT).
*/
-ssize_t inode_readlink(const struct inode *inode, char *buf, size_t buf_len,
- const WIMStruct *w, int read_resource_flags)
+ssize_t
+inode_readlink(const struct wim_inode *inode, mbchar *buf, size_t buf_len,
+ const WIMStruct *w, int read_resource_flags)
{
- const struct lookup_table_entry *lte;
+ const struct wim_lookup_table_entry *lte;
int ret;
wimlib_assert(inode_is_symlink(inode));
if (ret != 0)
return -EIO;
return get_symlink_name(res_buf, wim_resource_size(lte), buf,
- buf_len, inode->reparse_tag);
+ buf_len, inode->i_reparse_tag);
}
/*
*
* On failure @dentry and @lookup_table are not modified.
*/
-int inode_set_symlink(struct inode *inode, const char *target,
- struct lookup_table *lookup_table,
- struct lookup_table_entry **lte_ret)
+int
+inode_set_symlink(struct wim_inode *inode,
+ const mbchar *target,
+ struct wim_lookup_table *lookup_table,
+ struct wim_lookup_table_entry **lte_ret)
{
int ret;
size_t symlink_buf_len;
- struct lookup_table_entry *lte = NULL, *existing_lte;
+ struct wim_lookup_table_entry *lte = NULL, *existing_lte;
u8 symlink_buf_hash[SHA1_HASH_SIZE];
void *symlink_buf;
copy_hash(lte->hash, symlink_buf_hash);
}
- inode->lte = lte;
- inode->resolved = true;
+ inode->i_lte = lte;
+ inode->i_resolved = 1;
DEBUG("Loaded symlink buf");