diff options
Diffstat (limited to 'winsup/cygwin/mount.cc')
| -rw-r--r-- | winsup/cygwin/mount.cc | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/winsup/cygwin/mount.cc b/winsup/cygwin/mount.cc index bfb63f801..1bdd0a2e8 100644 --- a/winsup/cygwin/mount.cc +++ b/winsup/cygwin/mount.cc @@ -1873,3 +1873,154 @@ endmntent (FILE *) { return 1; } + +static bool +get_volume_path_names_for_volume_name (LPCWSTR vol, LPWSTR mounts) +{ + DWORD len; + if (GetVolumePathNamesForVolumeNameW (vol, mounts, NT_MAX_PATH, &len)) + return true; + + /* Windows 2000 doesn't have GetVolumePathNamesForVolumeNameW. + Just assume that mount points are not longer than MAX_PATH. */ + WCHAR drives[MAX_PATH], dvol[MAX_PATH], mp[MAX_PATH + 3]; + if (!GetLogicalDriveStringsW (MAX_PATH, drives)) + return false; + for (PWCHAR drive = drives; *drive; drive = wcschr (drive, '\0') + 1) + { + if (!GetVolumeNameForVolumeMountPointW (drive, dvol, MAX_PATH)) + continue; + if (!wcscasecmp (vol, dvol)) + mounts = wcpcpy (mounts, drive) + 1; + wcscpy (mp, drive); + HANDLE h = FindFirstVolumeMountPointW (dvol, mp + 3, MAX_PATH); + if (h == INVALID_HANDLE_VALUE) + continue; + do + { + if (GetVolumeNameForVolumeMountPointW (mp, dvol, MAX_PATH)) + if (!wcscasecmp (vol, dvol)) + mounts = wcpcpy (mounts, drive) + 1; + } + while (FindNextVolumeMountPointW (h, mp, MAX_PATH)); + FindVolumeMountPointClose (h); + } + *mounts = L'\0'; + return true; +} + +dos_drive_mappings::dos_drive_mappings () +: mappings(0) +{ + tmp_pathbuf tp; + wchar_t vol[64]; /* Long enough for Volume GUID string */ + wchar_t *devpath = tp.w_get (); + wchar_t *mounts = tp.w_get (); + + /* Iterate over all volumes, fetch the first path from the list of + DOS paths the volume is mounted to, or use the GUID volume path + otherwise. */ + HANDLE sh = FindFirstVolumeW (vol, 64); + if (sh == INVALID_HANDLE_VALUE) + debug_printf ("FindFirstVolumeW, %E"); + else + do + { + /* Skip drives which are not mounted. */ + if (!get_volume_path_names_for_volume_name (vol, mounts) + || mounts[0] == L'\0') + continue; + *wcsrchr (vol, L'\\') = L'\0'; + if (QueryDosDeviceW (vol + 4, devpath, NT_MAX_PATH)) + { + /* The DOS drive mapping can be another symbolic link. If so, + the mapping won't work since the section name is the name + after resolving all symlinks. Resolve symlinks here, too. */ + for (int syml_cnt = 0; syml_cnt < SYMLOOP_MAX; ++syml_cnt) + { + UNICODE_STRING upath; + OBJECT_ATTRIBUTES attr; + NTSTATUS status; + HANDLE h; + + RtlInitUnicodeString (&upath, devpath); + InitializeObjectAttributes (&attr, &upath, + OBJ_CASE_INSENSITIVE, NULL, NULL); + status = NtOpenSymbolicLinkObject (&h, SYMBOLIC_LINK_QUERY, + &attr); + if (!NT_SUCCESS (status)) + break; + RtlInitEmptyUnicodeString (&upath, devpath, (NT_MAX_PATH - 1) + * sizeof (WCHAR)); + status = NtQuerySymbolicLinkObject (h, &upath, NULL); + NtClose (h); + if (!NT_SUCCESS (status)) + break; + devpath[upath.Length / sizeof (WCHAR)] = L'\0'; + } + mapping *m = new mapping (); + if (m) + { + m->dospath = wcsdup (mounts); + m->ntdevpath = wcsdup (devpath); + if (!m->dospath || !m->ntdevpath) + { + free (m->dospath); + free (m->ntdevpath); + delete m; + continue; + } + m->doslen = wcslen (m->dospath); + m->dospath[--m->doslen] = L'\0'; /* Drop trailing backslash */ + m->ntlen = wcslen (m->ntdevpath); + m->next = mappings; + mappings = m; + } + } + else + debug_printf ("Unable to determine the native mapping for %ls " + "(error %lu)", vol, GetLastError ()); + } + while (FindNextVolumeW (sh, vol, 64)); + FindVolumeClose (sh); +} + +wchar_t * +dos_drive_mappings::fixup_if_match (wchar_t *path) +{ + /* Check for network drive first. */ + if (!wcsncmp (path, L"\\Device\\Mup\\", 12)) + { + path += 10; + path[0] = L'\\'; + return path; + } + /* Then test local drives. */ + for (mapping *m = mappings; m; m = m->next) + if (!wcsncmp (m->ntdevpath, path, m->ntlen)) + { + wchar_t *tmppath; + + if (m->ntlen > m->doslen) + wcsncpy (path += m->ntlen - m->doslen, m->dospath, m->doslen); + else if ((tmppath = wcsdup (path + m->ntlen)) != NULL) + { + wcpcpy (wcpcpy (path, m->dospath), tmppath); + free (tmppath); + } + break; + } + return path; +} + +dos_drive_mappings::~dos_drive_mappings () +{ + mapping *n = 0; + for (mapping *m = mappings; m; m = n) + { + n = m->next; + free (m->dospath); + free (m->ntdevpath); + delete m; + } +} |