#include "sha1.h"
#include <errno.h>
-/* None of this file is ever needed in Win32 builds because the reparse point
- * buffers are not parsed. */
+/* UNIX version of getting and setting the data in reparse points */
#if !defined(__WIN32__)
+#include <sys/stat.h>
+
/*
* Find the symlink target of a symbolic link or junction point in the WIM.
*
u16 print_name_offset;
u16 print_name_len;
char *link_target;
+ char *translated_target;
size_t link_target_len;
ssize_t ret;
unsigned header_size;
DEBUG("Interpeting substitute name \"%s\" (ReparseTag=0x%x)",
link_target, reparse_tag);
translate_slashes = true;
+ translated_target = link_target;
if (link_target_len >= 7 &&
- link_target[0] == '\\' &&
- link_target[1] == '?' &&
- link_target[2] == '?' &&
- link_target[3] == '\\' &&
- link_target[4] != '\0' &&
- link_target[5] == ':' &&
- link_target[6] == '\\')
+ translated_target[0] == '\\' &&
+ translated_target[1] == '?' &&
+ translated_target[2] == '?' &&
+ translated_target[3] == '\\' &&
+ translated_target[4] != '\0' &&
+ translated_target[5] == ':' &&
+ translated_target[6] == '\\')
{
/* "Full" symlink or junction (\??\x:\ prefixed path) */
- link_target += 6;
+ translated_target += 6;
link_target_len -= 6;
} else if (reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT &&
link_target_len >= 12 &&
- memcmp(link_target, "\\\\?\\Volume{", 11) == 0 &&
- link_target[link_target_len - 1] == '\\')
+ memcmp(translated_target, "\\\\?\\Volume{", 11) == 0 &&
+ translated_target[link_target_len - 1] == '\\')
{
/* Volume junction. Can't really do anything with it. */
translate_slashes = false;
} else if (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK &&
link_target_len >= 3 &&
- link_target[0] != '\0' &&
- link_target[1] == ':' &&
- link_target[2] == '/')
+ translated_target[0] != '\0' &&
+ translated_target[1] == ':' &&
+ translated_target[2] == '/')
{
/* "Absolute" symlink, with drive letter */
- link_target += 2;
+ translated_target += 2;
link_target_len -= 2;
} else if (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK &&
link_target_len >= 1)
{
- if (link_target[0] == '/')
+ if (translated_target[0] == '/')
/* "Absolute" symlink, without drive letter */
;
else
/* "Relative" symlink, without drive letter */
;
} else {
- ERROR("Invalid reparse point: \"%s\"", link_target);
+ ERROR("Invalid reparse point: \"%s\"", translated_target);
ret = -EIO;
goto out;
}
if (translate_slashes)
for (size_t i = 0; i < link_target_len; i++)
- if (link_target[i] == '\\')
- link_target[i] = '/';
- memcpy(buf, link_target, link_target_len + 1);
+ if (translated_target[i] == '\\')
+ translated_target[i] = '/';
+ memcpy(buf, translated_target, link_target_len + 1);
ret = link_target_len;
out:
FREE(link_target);
ret = tstr_to_utf16le(symlink_target, strlen(symlink_target),
&name_utf16le, &name_utf16le_nbytes);
- if (ret != 0)
+ if (ret)
return ret;
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;
+ size_t len = 12 + (name_utf16le_nbytes + 2) * 2;
void *buf = MALLOC(len);
if (buf) {
void *p = buf;
- p = put_u16(p, name_utf16le_nbytes); /* Substitute name offset */
+ p = put_u16(p, 0); /* 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, name_utf16le_nbytes + 2); /* Print name offset */
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_u32(p, 1); /* flags: 0 if relative link, otherwise 1 */
p = put_bytes(p, name_utf16le_nbytes, name_utf16le);
+ p = put_u16(p, 0);
p = put_bytes(p, name_utf16le_nbytes, name_utf16le);
+ p = put_u16(p, 0);
*len_ret = len;
*buf_ret = buf;
ret = 0;
return ret;
}
+static int
+unix_get_ino_and_dev(const char *path, u64 *ino_ret, u64 *dev_ret)
+{
+ struct stat stbuf;
+ if (stat(path, &stbuf)) {
+ WARNING_WITH_ERRNO("Failed to stat \"%s\"", path);
+ /* Treat as a link pointing outside the capture root (it
+ * most likely is). */
+ return WIMLIB_ERR_STAT;
+ } else {
+ *ino_ret = stbuf.st_ino;
+ *dev_ret = stbuf.st_dev;
+ return 0;
+ }
+}
+
#endif /* !defined(__WIN32__) */
+
+#ifdef __WIN32__
+# include "win32.h"
+# define RP_PATH_SEPARATOR L'\\'
+# define os_get_ino_and_dev win32_get_file_and_vol_ids
+#else
+# define RP_PATH_SEPARATOR '/'
+# define os_get_ino_and_dev unix_get_ino_and_dev
+#endif
+
+/* Fix up reparse points--- mostly shared between UNIX and Windows */
+tchar *
+fixup_symlink(tchar *dest, u64 capture_root_ino, u64 capture_root_dev)
+{
+ tchar *p = dest;
+
+#ifdef __WIN32__
+ /* Skip over drive letter */
+ if (*p != RP_PATH_SEPARATOR)
+ p += 2;
+#endif
+
+ DEBUG("Fixing symlink or junction \"%"TS"\"", dest);
+ for (;;) {
+ tchar save;
+ int ret;
+ u64 ino;
+ u64 dev;
+
+ while (*p == RP_PATH_SEPARATOR)
+ p++;
+
+ save = *p;
+ *p = T('\0');
+ ret = os_get_ino_and_dev(dest, &ino, &dev);
+ *p = save;
+
+ if (ino == capture_root_ino && dev == capture_root_dev) {
+ /* Link points inside capture root. Return abbreviated
+ * path. */
+ if (*p == T('\0'))
+ *(p - 1) = RP_PATH_SEPARATOR;
+ while (p - 1 >= dest && *(p - 1) == RP_PATH_SEPARATOR)
+ p--;
+ #ifdef __WIN32__
+ /* Add back drive letter */
+ if (*dest != RP_PATH_SEPARATOR) {
+ *--p = *(dest + 1);
+ *--p = *dest;
+ }
+ #endif
+ wimlib_assert(p >= dest);
+ return p;
+ }
+
+ if (*p == T('\0')) {
+ /* Link points outside capture root. */
+ return NULL;
+ }
+
+ do {
+ p++;
+ } while (*p != RP_PATH_SEPARATOR && *p != T('\0'));
+ }
+}
+
git://wimlib.net / wimlib / blobdiff