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#include "cache.h"
#include "fsmonitor.h"
#include "fsmonitor-path-utils.h"
/*
* Check remote working directory protocol.
*
* Return -1 if client machine cannot get remote protocol information.
*/
static int check_remote_protocol(wchar_t *wpath)
{
HANDLE h;
FILE_REMOTE_PROTOCOL_INFO proto_info;
h = CreateFileW(wpath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE) {
error(_("[GLE %ld] unable to open for read '%ls'"),
GetLastError(), wpath);
return -1;
}
if (!GetFileInformationByHandleEx(h, FileRemoteProtocolInfo,
&proto_info, sizeof(proto_info))) {
error(_("[GLE %ld] unable to get protocol information for '%ls'"),
GetLastError(), wpath);
CloseHandle(h);
return -1;
}
CloseHandle(h);
trace_printf_key(&trace_fsmonitor,
"check_remote_protocol('%ls') remote protocol %#8.8lx",
wpath, proto_info.Protocol);
return 0;
}
/*
* Notes for testing:
*
* (a) Windows allows a network share to be mapped to a drive letter.
* (This is the normal method to access it.)
*
* $ NET USE Z: \\server\share
* $ git -C Z:/repo status
*
* (b) Windows allows a network share to be referenced WITHOUT mapping
* it to drive letter.
*
* $ NET USE \\server\share\dir
* $ git -C //server/share/repo status
*
* (c) Windows allows "SUBST" to create a fake drive mapping to an
* arbitrary path (which may be remote)
*
* $ SUBST Q: Z:\repo
* $ git -C Q:/ status
*
* (d) Windows allows a directory symlink to be created on a local
* file system that points to a remote repo.
*
* $ mklink /d ./link //server/share/repo
* $ git -C ./link status
*/
int fsmonitor__get_fs_info(const char *path, struct fs_info *fs_info)
{
wchar_t wpath[MAX_PATH];
wchar_t wfullpath[MAX_PATH];
size_t wlen;
UINT driveType;
/*
* Do everything in wide chars because the drive letter might be
* a multi-byte sequence. See win32_has_dos_drive_prefix().
*/
if (xutftowcs_path(wpath, path) < 0) {
return -1;
}
/*
* GetDriveTypeW() requires a final slash. We assume that the
* worktree pathname points to an actual directory.
*/
wlen = wcslen(wpath);
if (wpath[wlen - 1] != L'\\' && wpath[wlen - 1] != L'/') {
wpath[wlen++] = L'\\';
wpath[wlen] = 0;
}
/*
* Normalize the path. If nothing else, this converts forward
* slashes to backslashes. This is essential to get GetDriveTypeW()
* correctly handle some UNC "\\server\share\..." paths.
*/
if (!GetFullPathNameW(wpath, MAX_PATH, wfullpath, NULL)) {
return -1;
}
driveType = GetDriveTypeW(wfullpath);
trace_printf_key(&trace_fsmonitor,
"DriveType '%s' L'%ls' (%u)",
path, wfullpath, driveType);
if (driveType == DRIVE_REMOTE) {
fs_info->is_remote = 1;
if (check_remote_protocol(wfullpath) < 0)
return -1;
} else {
fs_info->is_remote = 0;
}
trace_printf_key(&trace_fsmonitor,
"'%s' is_remote: %d",
path, fs_info->is_remote);
return 0;
}
int fsmonitor__is_fs_remote(const char *path)
{
struct fs_info fs;
if (fsmonitor__get_fs_info(path, &fs))
return -1;
return fs.is_remote;
}
/*
* No-op for now.
*/
int fsmonitor__get_alias(const char *path, struct alias_info *info)
{
return 0;
}
/*
* No-op for now.
*/
char *fsmonitor__resolve_alias(const char *path,
const struct alias_info *info)
{
return NULL;
}
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