464 lines
15 KiB
C
464 lines
15 KiB
C
|
/* path.h: path data structures
|
||
|
|
||
|
This file is part of Cygwin.
|
||
|
|
||
|
This software is a copyrighted work licensed under the terms of the
|
||
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
||
|
details. */
|
||
|
|
||
|
#include "devices.h"
|
||
|
#include "mount.h"
|
||
|
#include "cygheap_malloc.h"
|
||
|
#include "nfs.h"
|
||
|
|
||
|
#include <sys/mount.h>
|
||
|
#include <sys/ioctl.h>
|
||
|
#include <fcntl.h>
|
||
|
#include <alloca.h>
|
||
|
|
||
|
extern inline bool
|
||
|
has_attribute (DWORD attributes, DWORD attribs_to_test)
|
||
|
{
|
||
|
return attributes != INVALID_FILE_ATTRIBUTES
|
||
|
&& (attributes & attribs_to_test);
|
||
|
}
|
||
|
|
||
|
enum executable_states
|
||
|
{
|
||
|
is_executable,
|
||
|
dont_care_if_executable,
|
||
|
not_executable = dont_care_if_executable,
|
||
|
dont_know_if_executable
|
||
|
};
|
||
|
|
||
|
struct suffix_info
|
||
|
{
|
||
|
const char *name;
|
||
|
int addon;
|
||
|
suffix_info (const char *s, int addit = 0): name (s), addon (addit) {}
|
||
|
};
|
||
|
|
||
|
extern suffix_info stat_suffixes[];
|
||
|
|
||
|
/* DO NOT copy any of these files into the same set of flags as the
|
||
|
below path_types. Ever. */
|
||
|
enum pathconv_arg
|
||
|
{
|
||
|
PC_SYM_FOLLOW = _BIT ( 0), /* follow symlinks */
|
||
|
PC_SYM_NOFOLLOW = _BIT ( 1), /* don't follow symlinks (but honor
|
||
|
trailing slashes) */
|
||
|
PC_SYM_NOFOLLOW_REP = _BIT ( 2), /* don't follow dir reparse point */
|
||
|
PC_SYM_CONTENTS = _BIT ( 3), /* don't follow, return content only */
|
||
|
PC_NOFULL = _BIT ( 4), /* keep relative path */
|
||
|
PC_NULLEMPTY = _BIT ( 5), /* empty path is no error */
|
||
|
PC_NONULLEMPTY = _BIT ( 6), /* override PC_NULLEMPTY default */
|
||
|
PC_POSIX = _BIT ( 7), /* return normalized posix path */
|
||
|
PC_OPEN = _BIT ( 9), /* use open semantics */
|
||
|
PC_CTTY = _BIT (10), /* could later be used as ctty */
|
||
|
PC_SYM_NOFOLLOW_PROCFD = _BIT (11), /* allow /proc/PID/fd redirection */
|
||
|
PC_KEEP_HANDLE = _BIT (12), /* keep handle for later stat calls */
|
||
|
PC_NO_ACCESS_CHECK = _BIT (13), /* helper flag for error check */
|
||
|
PC_SYM_NOFOLLOW_DIR = _BIT (14), /* don't follow a trailing slash */
|
||
|
PC_DONT_USE = _BIT (31) /* conversion to signed happens. */
|
||
|
};
|
||
|
|
||
|
enum path_types
|
||
|
{
|
||
|
PATH_CTTY = _BIT ( 0), /* could later be used as ctty */
|
||
|
PATH_OPEN = _BIT ( 1), /* use open semantics */
|
||
|
PATH_LNK = _BIT ( 2), /* *.lnk-type symlink */
|
||
|
PATH_REP = _BIT ( 3), /* reparse point known to Cygwin */
|
||
|
PATH_SYMLINK = _BIT ( 4), /* symlink understood by Cygwin */
|
||
|
PATH_SOCKET = _BIT ( 5), /* AF_UNIX socket file */
|
||
|
PATH_RESOLVE_PROCFD = _BIT ( 6), /* fd symlink via /proc */
|
||
|
PATH_REP_NOAPI = _BIT ( 7), /* rep. point unknown to WinAPI */
|
||
|
PATH_DONT_USE = _BIT (31) /* conversion to signed happens. */
|
||
|
};
|
||
|
|
||
|
enum fetch_fh_flags
|
||
|
{
|
||
|
FFH_LINKAT = (1 << 0),
|
||
|
};
|
||
|
|
||
|
NTSTATUS file_get_fai (HANDLE, PFILE_ALL_INFORMATION);
|
||
|
int check_reparse_point_target (HANDLE, bool, PREPARSE_DATA_BUFFER,
|
||
|
PUNICODE_STRING);
|
||
|
|
||
|
class symlink_info;
|
||
|
|
||
|
class path_conv_handle
|
||
|
{
|
||
|
HANDLE hdl;
|
||
|
union {
|
||
|
FILE_ALL_INFORMATION _fai;
|
||
|
/* For NFS. */
|
||
|
fattr3 _fattr3;
|
||
|
} attribs;
|
||
|
public:
|
||
|
path_conv_handle () : hdl (NULL) {}
|
||
|
inline void set (HANDLE h) { hdl = h; }
|
||
|
inline void close ()
|
||
|
{
|
||
|
if (hdl)
|
||
|
CloseHandle (hdl);
|
||
|
set (NULL);
|
||
|
}
|
||
|
inline void dup (const path_conv_handle &pch)
|
||
|
{
|
||
|
if (!DuplicateHandle (GetCurrentProcess (), pch.handle (),
|
||
|
GetCurrentProcess (), &hdl,
|
||
|
0, TRUE, DUPLICATE_SAME_ACCESS))
|
||
|
hdl = NULL;
|
||
|
}
|
||
|
inline HANDLE handle () const { return hdl; }
|
||
|
inline PFILE_ALL_INFORMATION fai () const
|
||
|
{ return (PFILE_ALL_INFORMATION) &attribs._fai; }
|
||
|
inline struct fattr3 *nfsattr () const
|
||
|
{ return (struct fattr3 *) &attribs._fattr3; }
|
||
|
inline NTSTATUS get_finfo (HANDLE h, bool nfs)
|
||
|
{
|
||
|
return nfs ? nfs_fetch_fattr3 (h, nfsattr ()) : file_get_fai (h, fai ());
|
||
|
}
|
||
|
inline ino_t get_ino (bool nfs) const
|
||
|
{
|
||
|
return nfs ? nfsattr ()->fileid
|
||
|
: fai ()->InternalInformation.IndexNumber.QuadPart;
|
||
|
}
|
||
|
inline DWORD get_dosattr (bool nfs) const
|
||
|
{
|
||
|
if (nfs)
|
||
|
return (nfsattr ()->type & 7) == NF3DIR ? FILE_ATTRIBUTE_DIRECTORY : 0;
|
||
|
return fai ()->BasicInformation.FileAttributes;
|
||
|
}
|
||
|
};
|
||
|
|
||
|
class path_conv
|
||
|
{
|
||
|
DWORD fileattr;
|
||
|
ULONG caseinsensitive;
|
||
|
fs_info fs;
|
||
|
|
||
|
PWCHAR wide_path;
|
||
|
UNICODE_STRING uni_path;
|
||
|
DWORD symlink_length;
|
||
|
const char *path;
|
||
|
uint32_t mount_flags;
|
||
|
uint32_t path_flags;
|
||
|
const char *suffix;
|
||
|
const char *posix_path;
|
||
|
path_conv_handle conv_handle;
|
||
|
|
||
|
void add_ext_from_sym (symlink_info&);
|
||
|
char *modifiable_path () {return (char *) path;}
|
||
|
|
||
|
public:
|
||
|
int error;
|
||
|
device dev;
|
||
|
|
||
|
void *serialize (HANDLE, unsigned int &) const;
|
||
|
HANDLE deserialize (void *);
|
||
|
|
||
|
const char *known_suffix () { return suffix; }
|
||
|
bool isremote () const {return fs.is_remote_drive ();}
|
||
|
ULONG objcaseinsensitive () const {return caseinsensitive;}
|
||
|
bool has_acls () const {return !(mount_flags & MOUNT_NOACL)
|
||
|
&& fs.has_acls (); }
|
||
|
bool hasgood_inode () const {return !(mount_flags & MOUNT_IHASH); }
|
||
|
bool isgood_inode (ino_t ino) const;
|
||
|
bool support_sparse () const
|
||
|
{
|
||
|
return (mount_flags & MOUNT_SPARSE)
|
||
|
&& (fs_flags () & FILE_SUPPORTS_SPARSE_FILES);
|
||
|
}
|
||
|
int has_dos_filenames_only () const {return mount_flags & MOUNT_DOS;}
|
||
|
int has_buggy_reopen () const {return fs.has_buggy_reopen ();}
|
||
|
int has_buggy_fileid_dirinfo () const {return fs.has_buggy_fileid_dirinfo ();}
|
||
|
int has_buggy_basic_info () const {return fs.has_buggy_basic_info ();}
|
||
|
int binmode () const
|
||
|
{
|
||
|
return (mount_flags & MOUNT_TEXT) ? O_TEXT : O_BINARY;
|
||
|
}
|
||
|
int issymlink () const {return path_flags & PATH_SYMLINK;}
|
||
|
int is_lnk_symlink () const {return path_flags & PATH_LNK;}
|
||
|
/* This indicates any known reparse point */
|
||
|
int is_known_reparse_point () const {return path_flags & PATH_REP;}
|
||
|
/* This indicates any known reparse point, handled sanely by WinAPI.
|
||
|
The difference is crucial: WSL symlinks, for instance, are known
|
||
|
reparse points, so we want to open them as reparse points usually.
|
||
|
However they are foreign to WinAPI and not handled sanely. If one
|
||
|
is part of $PATH, WinAPI functions may fail under the hood with
|
||
|
STATUS_IO_REPARSE_TAG_NOT_HANDLED. */
|
||
|
int is_winapi_reparse_point () const
|
||
|
{
|
||
|
return (path_flags & (PATH_REP | PATH_REP_NOAPI)) == PATH_REP;
|
||
|
}
|
||
|
int isdevice () const {return dev.not_device (FH_FS) && dev.not_device (FH_FIFO);}
|
||
|
int isfifo () const {return dev.is_device (FH_FIFO);}
|
||
|
int isspecial () const {return dev.not_device (FH_FS);}
|
||
|
int iscygdrive () const {return dev.is_device (FH_CYGDRIVE);}
|
||
|
int is_fs_special () const {return dev.is_fs_special ();}
|
||
|
|
||
|
int is_lnk_special () const {return (isdevice () && is_fs_special ()
|
||
|
&& !issocket ())
|
||
|
|| isfifo () || is_lnk_symlink ();}
|
||
|
#ifdef __WITH_AF_UNIX
|
||
|
int issocket () const {return dev.is_device (FH_LOCAL)
|
||
|
|| dev.is_device (FH_UNIX);}
|
||
|
#else
|
||
|
int issocket () const {return dev.is_device (FH_LOCAL);}
|
||
|
#endif /* __WITH_AF_UNIX */
|
||
|
int iscygexec () const {return mount_flags & MOUNT_CYGWIN_EXEC;}
|
||
|
int isopen () const {return path_flags & PATH_OPEN;}
|
||
|
int isctty_capable () const {return path_flags & PATH_CTTY;}
|
||
|
int follow_fd_symlink () const {return path_flags & PATH_RESOLVE_PROCFD;}
|
||
|
void set_cygexec (bool isset)
|
||
|
{
|
||
|
if (isset)
|
||
|
mount_flags |= MOUNT_CYGWIN_EXEC;
|
||
|
else
|
||
|
mount_flags &= ~MOUNT_CYGWIN_EXEC;
|
||
|
}
|
||
|
void set_cygexec (void *target)
|
||
|
{
|
||
|
if (target)
|
||
|
mount_flags |= MOUNT_CYGWIN_EXEC;
|
||
|
else
|
||
|
mount_flags &= ~MOUNT_CYGWIN_EXEC;
|
||
|
}
|
||
|
bool isro () const {return !!(mount_flags & MOUNT_RO);}
|
||
|
bool exists () const {return fileattr != INVALID_FILE_ATTRIBUTES;}
|
||
|
bool has_attribute (DWORD x) const {return exists () && (fileattr & x);}
|
||
|
int isdir () const {return has_attribute (FILE_ATTRIBUTE_DIRECTORY);}
|
||
|
executable_states exec_state ()
|
||
|
{
|
||
|
extern int _check_for_executable;
|
||
|
if (mount_flags & (MOUNT_CYGWIN_EXEC | MOUNT_EXEC))
|
||
|
return is_executable;
|
||
|
if (mount_flags & MOUNT_NOTEXEC)
|
||
|
return not_executable;
|
||
|
if (!_check_for_executable)
|
||
|
return dont_care_if_executable;
|
||
|
return dont_know_if_executable;
|
||
|
}
|
||
|
|
||
|
void set_symlink (DWORD n) {path_flags |= PATH_SYMLINK; symlink_length = n;}
|
||
|
void set_exec (int x = 1) {mount_flags |= x ? MOUNT_EXEC : MOUNT_NOTEXEC;}
|
||
|
|
||
|
void __reg3 check (const UNICODE_STRING *upath, uint32_t opt = PC_SYM_FOLLOW,
|
||
|
const suffix_info *suffixes = NULL);
|
||
|
void __reg3 check (const char *src, uint32_t opt = PC_SYM_FOLLOW,
|
||
|
const suffix_info *suffixes = NULL);
|
||
|
|
||
|
path_conv (const device& in_dev)
|
||
|
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
|
||
|
mount_flags (0), path_flags (0), suffix (NULL), posix_path (NULL),
|
||
|
error (0), dev (in_dev)
|
||
|
{
|
||
|
set_path (in_dev.native ());
|
||
|
}
|
||
|
|
||
|
path_conv (const UNICODE_STRING *src, uint32_t opt = PC_SYM_FOLLOW,
|
||
|
const suffix_info *suffixes = NULL)
|
||
|
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
|
||
|
mount_flags (0), path_flags (0), suffix (NULL), posix_path (NULL), error (0)
|
||
|
{
|
||
|
check (src, opt | ((opt & PC_NONULLEMPTY) ? 0 : PC_NULLEMPTY), suffixes);
|
||
|
}
|
||
|
|
||
|
path_conv (const char *src, uint32_t opt = PC_SYM_FOLLOW,
|
||
|
const suffix_info *suffixes = NULL)
|
||
|
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
|
||
|
mount_flags (0), path_flags (0), suffix (NULL), posix_path (NULL), error (0)
|
||
|
{
|
||
|
check (src, opt | ((opt & PC_NONULLEMPTY) ? 0 : PC_NULLEMPTY), suffixes);
|
||
|
}
|
||
|
|
||
|
path_conv ()
|
||
|
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
|
||
|
mount_flags (0), path_flags (0), suffix (NULL), posix_path (NULL), error (0)
|
||
|
{}
|
||
|
|
||
|
~path_conv ();
|
||
|
inline const char *get_win32 () const { return path; }
|
||
|
void set_nt_native_path (PUNICODE_STRING);
|
||
|
PUNICODE_STRING get_nt_native_path ();
|
||
|
inline POBJECT_ATTRIBUTES get_object_attr (OBJECT_ATTRIBUTES &attr,
|
||
|
SECURITY_ATTRIBUTES &sa)
|
||
|
{
|
||
|
if (!get_nt_native_path ())
|
||
|
return NULL;
|
||
|
InitializeObjectAttributes (&attr, &uni_path,
|
||
|
objcaseinsensitive ()
|
||
|
| (sa.bInheritHandle ? OBJ_INHERIT : 0),
|
||
|
NULL, sa.lpSecurityDescriptor);
|
||
|
return &attr;
|
||
|
}
|
||
|
inline POBJECT_ATTRIBUTES init_reopen_attr (OBJECT_ATTRIBUTES &attr, HANDLE h)
|
||
|
{
|
||
|
if (has_buggy_reopen ())
|
||
|
InitializeObjectAttributes (&attr, get_nt_native_path (),
|
||
|
objcaseinsensitive (), NULL, NULL)
|
||
|
else
|
||
|
InitializeObjectAttributes (&attr, &ro_u_empty, objcaseinsensitive (),
|
||
|
h, NULL);
|
||
|
return &attr;
|
||
|
}
|
||
|
inline size_t get_wide_win32_path_len ()
|
||
|
{
|
||
|
get_nt_native_path ();
|
||
|
return uni_path.Length / sizeof (WCHAR);
|
||
|
}
|
||
|
|
||
|
PWCHAR get_wide_win32_path (PWCHAR wc);
|
||
|
operator DWORD &() {return fileattr;}
|
||
|
operator int () {return fileattr; }
|
||
|
# define cfree_and_null(x) \
|
||
|
if (x) \
|
||
|
{ \
|
||
|
cfree ((void *) (x)); \
|
||
|
(x) = NULL; \
|
||
|
}
|
||
|
void free_strings ()
|
||
|
{
|
||
|
cfree_and_null (path);
|
||
|
cfree_and_null (posix_path);
|
||
|
cfree_and_null (wide_path);
|
||
|
}
|
||
|
path_conv& eq_worker (const path_conv& pc, const char *in_path)
|
||
|
{
|
||
|
free_strings ();
|
||
|
memcpy ((void *) this, &pc, sizeof pc);
|
||
|
/* The device info might contain pointers to allocated strings, in
|
||
|
contrast to statically allocated strings. Calling device::dup()
|
||
|
will duplicate the string if the source was allocated. */
|
||
|
dev.dup ();
|
||
|
if (in_path)
|
||
|
path = cstrdup (in_path);
|
||
|
conv_handle.dup (pc.conv_handle);
|
||
|
if (pc.posix_path)
|
||
|
posix_path = cstrdup(pc.posix_path);
|
||
|
if (pc.wide_path)
|
||
|
{
|
||
|
wide_path = cwcsdup (uni_path.Buffer);
|
||
|
if (!wide_path)
|
||
|
api_fatal ("cwcsdup would have returned NULL");
|
||
|
uni_path.Buffer = wide_path;
|
||
|
}
|
||
|
return *this;
|
||
|
}
|
||
|
|
||
|
path_conv &operator << (const path_conv& pc)
|
||
|
{
|
||
|
const char *save_path;
|
||
|
|
||
|
if (!path)
|
||
|
save_path = pc.path;
|
||
|
else
|
||
|
{
|
||
|
save_path = (char *) alloca (strlen (path) + 1);
|
||
|
strcpy ((char *) save_path, path);
|
||
|
}
|
||
|
return eq_worker (pc, save_path);
|
||
|
}
|
||
|
|
||
|
path_conv &operator =(const path_conv& pc)
|
||
|
{
|
||
|
return eq_worker (pc, pc.path);
|
||
|
}
|
||
|
dev_t get_device () {return dev.get_device ();}
|
||
|
DWORD file_attributes () const {return fileattr;}
|
||
|
void file_attributes (DWORD new_attr) {fileattr = new_attr;}
|
||
|
DWORD fs_flags () const {return fs.flags ();}
|
||
|
DWORD fs_name_len () const {return fs.name_len ();}
|
||
|
bool fs_got_fs () const { return fs.got_fs (); }
|
||
|
bool fs_is_fat () const {return fs.is_fat ();}
|
||
|
bool fs_is_exfat () const {return fs.is_exfat ();}
|
||
|
bool fs_is_any_fat () const {return fs.is_fat () || fs.is_exfat ();}
|
||
|
bool fs_is_ntfs () const {return fs.is_ntfs ();}
|
||
|
bool fs_is_refs () const {return fs.is_refs ();}
|
||
|
bool fs_is_samba () const {return fs.is_samba ();}
|
||
|
bool fs_is_nfs () const {return fs.is_nfs ();}
|
||
|
bool fs_is_netapp () const {return fs.is_netapp ();}
|
||
|
bool fs_is_cdrom () const {return fs.is_cdrom ();}
|
||
|
bool fs_is_mvfs () const {return fs.is_mvfs ();}
|
||
|
bool fs_is_cifs () const {return fs.is_cifs ();}
|
||
|
bool fs_is_nwfs () const {return fs.is_nwfs ();}
|
||
|
bool fs_is_ncfsd () const {return fs.is_ncfsd ();}
|
||
|
bool fs_is_afs () const {return fs.is_afs ();}
|
||
|
bool fs_is_prlfs () const {return fs.is_prlfs ();}
|
||
|
fs_info_type fs_type () const {return fs.what_fs ();}
|
||
|
ULONG fs_serial_number () const {return fs.serial_number ();}
|
||
|
inline const char *set_path (const char *p)
|
||
|
{
|
||
|
if (path)
|
||
|
cfree (modifiable_path ());
|
||
|
char *new_path = (char *) cmalloc_abort (HEAP_STR, strlen (p) + 7);
|
||
|
strcpy (new_path, p);
|
||
|
return path = new_path;
|
||
|
}
|
||
|
bool is_binary ();
|
||
|
|
||
|
HANDLE handle () const { return conv_handle.handle (); }
|
||
|
PFILE_ALL_INFORMATION fai () { return conv_handle.fai (); }
|
||
|
struct fattr3 *nfsattr () { return conv_handle.nfsattr (); }
|
||
|
inline NTSTATUS get_finfo (HANDLE h)
|
||
|
{
|
||
|
return conv_handle.get_finfo (h, fs.is_nfs ());
|
||
|
}
|
||
|
inline ino_t get_ino () const { return conv_handle.get_ino (fs.is_nfs ()); }
|
||
|
void reset_conv_handle () { conv_handle.set (NULL); }
|
||
|
void close_conv_handle () { conv_handle.close (); }
|
||
|
|
||
|
ino_t get_ino_by_handle (HANDLE h);
|
||
|
inline const char *get_posix () const { return posix_path; }
|
||
|
void __reg2 set_posix (const char *);
|
||
|
DWORD get_symlink_length () { return symlink_length; };
|
||
|
};
|
||
|
|
||
|
/* Symlink marker */
|
||
|
#define SYMLINK_COOKIE "!<symlink>"
|
||
|
|
||
|
/* Socket marker */
|
||
|
#define SOCKET_COOKIE "!<socket >"
|
||
|
|
||
|
/* Interix symlink marker */
|
||
|
#define INTERIX_SYMLINK_COOKIE "IntxLNK\1"
|
||
|
|
||
|
enum fe_types
|
||
|
{
|
||
|
FE_NADA = 0, /* Nothing special */
|
||
|
FE_NNF = 1, /* Return NULL if not found */
|
||
|
FE_CWD = 4, /* Search CWD for program */
|
||
|
FE_DLL = 8 /* Search for DLLs, not executables. */
|
||
|
};
|
||
|
const char *__reg3 find_exec (const char *name, path_conv& buf,
|
||
|
const char *search = "PATH",
|
||
|
unsigned opt = FE_NADA,
|
||
|
const char **known_suffix = NULL);
|
||
|
|
||
|
/* Common macros for checking for invalid path names */
|
||
|
#define isdrive(s) (isalpha (*(s)) && (s)[1] == ':')
|
||
|
#define iswdrive(s) (iswalpha (*(s)) && (s)[1] == L':')
|
||
|
|
||
|
static inline bool
|
||
|
has_exec_chars (const char *buf, int len)
|
||
|
{
|
||
|
return len >= 2 &&
|
||
|
((buf[0] == '#' && buf[1] == '!') ||
|
||
|
(buf[0] == ':' && buf[1] == '\n') ||
|
||
|
(buf[0] == 'M' && buf[1] == 'Z'));
|
||
|
}
|
||
|
|
||
|
int __reg3 pathmatch (const char *path1, const char *path2, bool caseinsensitive);
|
||
|
int __reg3 pathnmatch (const char *path1, const char *path2, int len, bool caseinsensitive);
|
||
|
bool __reg2 has_dot_last_component (const char *dir, bool test_dot_dot);
|
||
|
|
||
|
int __reg3 path_prefix_p (const char *path1, const char *path2, int len1,
|
||
|
bool caseinsensitive);
|
||
|
|
||
|
int normalize_win32_path (const char *, char *, char *&);
|
||
|
int normalize_posix_path (const char *, char *, char *&);
|
||
|
PUNICODE_STRING __reg3 get_nt_native_path (const char *, UNICODE_STRING&, bool);
|
||
|
|
||
|
int __reg3 symlink_worker (const char *, path_conv &, bool);
|