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* external.cc (cygwin_internal): Implement CW_ALLOC_DRIVE_MAP,

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CW_MAP_DRIVE_MAP, CW_FREE_DRIVE_MAP.
	* fhandler_process.cc: Include mount.h.
	(get_volume_path_names_for_volume_name): Move to mount.cc.
	(struct dos_drive_mappings): Ditto.
	* mount.cc (get_volume_path_names_for_volume_name): Move here.
	(dos_drive_mappings::dos_drive_mappings): Ditto.
	(dos_drive_mappings::fixup_if_match): Ditto.
	(dos_drive_mappings::~dos_drive_mappings): Ditto.
	* mount.h (class dos_drive_mappings): Declare her.
	* include/sys/cygwin.h (cygwin_getinfo_types): Add CW_ALLOC_DRIVE_MAP,
	CW_MAP_DRIVE_MAP, CW_FREE_DRIVE_MAP.
	* include/cygwin/version.h: Bump API minor number.
This commit is contained in:
Corinna Vinschen
2011-12-22 12:25:10 +00:00
parent 3a03267d6d
commit 3a24189bba
7 changed files with 217 additions and 165 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,19 @@
2011-12-22 Corinna Vinschen <vinschen@redhat.com>
* external.cc (cygwin_internal): Implement CW_ALLOC_DRIVE_MAP,
CW_MAP_DRIVE_MAP, CW_FREE_DRIVE_MAP.
* fhandler_process.cc: Include mount.h.
(get_volume_path_names_for_volume_name): Move to mount.cc.
(struct dos_drive_mappings): Ditto.
* mount.cc (get_volume_path_names_for_volume_name): Move here.
(dos_drive_mappings::dos_drive_mappings): Ditto.
(dos_drive_mappings::fixup_if_match): Ditto.
(dos_drive_mappings::~dos_drive_mappings): Ditto.
* mount.h (class dos_drive_mappings): Declare her.
* include/sys/cygwin.h (cygwin_getinfo_types): Add CW_ALLOC_DRIVE_MAP,
CW_MAP_DRIVE_MAP, CW_FREE_DRIVE_MAP.
* include/cygwin/version.h: Bump API minor number.
2011-12-22 Corinna Vinschen <vinschen@redhat.com>
* fhandler_process.cc: Drop unneeded includes.

25
winsup/cygwin/external.cc
View File

@@ -528,6 +528,31 @@ cygwin_internal (cygwin_getinfo_types t, ...)
}
break;
case CW_ALLOC_DRIVE_MAP:
{
dos_drive_mappings *ddm = new dos_drive_mappings ();
res = (uintptr_t) ddm;
}
break;
case CW_MAP_DRIVE_MAP:
{
dos_drive_mappings *ddm = va_arg (arg, dos_drive_mappings *);
wchar_t *pathbuf = va_arg (arg, wchar_t *);
if (ddm && pathbuf)
res = (uintptr_t) ddm->fixup_if_match (pathbuf);
}
break;
case CW_FREE_DRIVE_MAP:
{
dos_drive_mappings *ddm = va_arg (arg, dos_drive_mappings *);
if (ddm)
delete ddm;
res = 0;
}
break;
default:
set_errno (ENOSYS);
}

164
winsup/cygwin/fhandler_process.cc
View File

@@ -25,6 +25,7 @@ details. */
#include "ntdll.h"
#include "cygtls.h"
#include "pwdgrp.h"
#include "mount.h"
#include "tls_pbuf.h"
#include <sys/param.h>
#include <ctype.h>
@@ -541,169 +542,6 @@ format_process_winexename (void *data, char *&destbuf)
return len + 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;
}
struct dos_drive_mappings
{
struct mapping
{
mapping *next;
size_t doslen;
size_t ntlen;
wchar_t *dospath;
wchar_t *ntdevpath;
};
mapping *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 *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 ()
{
mapping *n = 0;
for (mapping *m = mappings; m; m = n)
{
n = m->next;
free (m->dospath);
free (m->ntdevpath);
delete m;
}
}
};
struct heap_info
{
struct heap

3
winsup/cygwin/include/cygwin/version.h
View File

@@ -424,12 +424,13 @@ details. */
253: Export TIOCSCTTY, tcgetsid.
254: Export getgrouplist.
255: Export ptsname_r.
256: Add CW_ALLOC_DRIVE_MAP, CW_MAP_DRIVE_MAP, CW_FREE_DRIVE_MAP.
*/
/* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
#define CYGWIN_VERSION_API_MAJOR 0
#define CYGWIN_VERSION_API_MINOR 255
#define CYGWIN_VERSION_API_MINOR 256
/* There is also a compatibity version number associated with the
shared memory regions. It is incremented when incompatible

5
winsup/cygwin/include/sys/cygwin.h
View File

@@ -137,7 +137,10 @@ typedef enum
CW_CVT_MNT_OPTS,
CW_LST_MNT_OPTS,
CW_STRERROR,
CW_CVT_ENV_TO_WINENV
CW_CVT_ENV_TO_WINENV,
CW_ALLOC_DRIVE_MAP,
CW_MAP_DRIVE_MAP,
CW_FREE_DRIVE_MAP
} cygwin_getinfo_types;
#define CW_LOCK_PINFO CW_LOCK_PINFO

151
winsup/cygwin/mount.cc
View File

@@ -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;
}
}

18
winsup/cygwin/mount.h
View File

@@ -197,4 +197,22 @@ class mount_info
int cygdrive_win32_path (const char *src, char *dst, int& unit);
};
class dos_drive_mappings
{
struct mapping
{
mapping *next;
size_t doslen;
size_t ntlen;
wchar_t *dospath;
wchar_t *ntdevpath;
};
mapping *mappings;
public:
dos_drive_mappings ();
~dos_drive_mappings ();
wchar_t *fixup_if_match (wchar_t *path);
};
#endif