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libc/winsup/cygwin/path.h

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/* 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/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[];
enum pathconv_arg
{
PC_SYM_FOLLOW = 0x0001,
PC_SYM_NOFOLLOW = 0x0002,
PC_SYM_NOFOLLOW_REP = 0x0004,
PC_SYM_CONTENTS = 0x0008,
PC_NOFULL = 0x0010,
PC_NULLEMPTY = 0x0020,
PC_POSIX = 0x0080,
PC_NOWARN = 0x0100,
PC_OPEN = 0x0200, /* use open semantics */
PC_CTTY = 0x0400, /* could later be used as ctty */
PC_KEEP_HANDLE = 0x00400000,
PC_NO_ACCESS_CHECK = 0x00800000
};
#define PC_NONULLEMPTY -1
#include "sys/mount.h"
enum path_types
{
PATH_NOTHING = 0,
PATH_SYMLINK = MOUNT_SYMLINK,
PATH_BINARY = MOUNT_BINARY,
PATH_EXEC = MOUNT_EXEC,
PATH_NOTEXEC = MOUNT_NOTEXEC,
PATH_CYGWIN_EXEC = MOUNT_CYGWIN_EXEC,
PATH_SPARSE = MOUNT_SPARSE,
PATH_RO = MOUNT_RO,
PATH_NOACL = MOUNT_NOACL,
PATH_NOPOSIX = MOUNT_NOPOSIX,
PATH_DOS = MOUNT_DOS,
PATH_IHASH = MOUNT_IHASH,
PATH_ALL_EXEC = (PATH_CYGWIN_EXEC | PATH_EXEC),
PATH_NO_ACCESS_CHECK = PC_NO_ACCESS_CHECK,
PATH_CTTY = 0x00400000, /* could later be used as ctty */
PATH_OPEN = 0x00800000, /* use open semantics */
/* FIXME? PATH_OPEN collides with
PATH_NO_ACCESS_CHECK, but it looks
like they are never used together. */
PATH_LNK = 0x01000000,
PATH_TEXT = 0x02000000,
PATH_REP = 0x04000000,
PATH_HAS_SYMLINKS = 0x10000000,
PATH_SOCKET = 0x40000000
};
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;
void add_ext_from_sym (symlink_info&);
DWORD symlink_length;
const char *path;
unsigned path_flags;
const char *suffix;
const char *posix_path;
path_conv_handle conv_handle;
public:
int error;
device dev;
const char *known_suffix () { return suffix; }
bool isremote () const {return fs.is_remote_drive ();}
ULONG objcaseinsensitive () const {return caseinsensitive;}
bool has_acls () const {return !(path_flags & PATH_NOACL) && fs.has_acls (); }
bool hasgood_inode () const {return !(path_flags & PATH_IHASH); }
bool isgood_inode (ino_t ino) const;
bool support_sparse () const
{
return (path_flags & PATH_SPARSE)
&& (fs_flags () & FILE_SUPPORTS_SPARSE_FILES);
}
int has_symlinks () const {return path_flags & PATH_HAS_SYMLINKS;}
int has_dos_filenames_only () const {return path_flags & PATH_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
{
if (path_flags & PATH_BINARY)
return O_BINARY;
if (path_flags & PATH_TEXT)
return O_TEXT;
return 0;
}
int issymlink () const {return path_flags & PATH_SYMLINK;}
int is_lnk_symlink () const {return path_flags & PATH_LNK;}
int is_known_reparse_point () const {return path_flags & 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_auto_device () const {return isdevice () && !is_fs_special ();}
int is_fs_device () const {return isdevice () && is_fs_special ();}
int is_fs_special () const {return dev.is_fs_special ();}
int is_lnk_special () const {return is_fs_device () || 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 path_flags & PATH_CYGWIN_EXEC;}
int isopen () const {return path_flags & PATH_OPEN;}
int isctty_capable () const {return path_flags & PATH_CTTY;}
void set_cygexec (bool isset)
{
if (isset)
path_flags |= PATH_CYGWIN_EXEC;
else
path_flags &= ~PATH_CYGWIN_EXEC;
}
void set_cygexec (void *target)
{
if (target)
path_flags |= PATH_CYGWIN_EXEC;
else
path_flags &= ~PATH_CYGWIN_EXEC;
}
bool isro () const {return !!(path_flags & PATH_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 (path_flags & PATH_ALL_EXEC)
return is_executable;
if (path_flags & PATH_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_has_symlinks () {path_flags |= PATH_HAS_SYMLINKS;}
void set_exec (int x = 1) {path_flags |= x ? PATH_EXEC : PATH_NOTEXEC;}
void __reg3 check (const UNICODE_STRING *upath, unsigned opt = PC_SYM_FOLLOW,
const suffix_info *suffixes = NULL);
void __reg3 check (const char *src, unsigned opt = PC_SYM_FOLLOW,
const suffix_info *suffixes = NULL);
path_conv (const device& in_dev)
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
path_flags (0), suffix (NULL), posix_path (NULL), error (0),
dev (in_dev)
{
set_path (in_dev.native ());
}
path_conv (int, const char *src, unsigned opt = PC_SYM_FOLLOW,
const suffix_info *suffixes = NULL)
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
path_flags (0), suffix (NULL), posix_path (NULL), error (0)
{
check (src, opt, suffixes);
}
path_conv (const UNICODE_STRING *src, unsigned opt = PC_SYM_FOLLOW,
const suffix_info *suffixes = NULL)
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
path_flags (0), suffix (NULL), posix_path (NULL), error (0)
{
check (src, opt | PC_NULLEMPTY, suffixes);
}
path_conv (const char *src, unsigned opt = PC_SYM_FOLLOW,
const suffix_info *suffixes = NULL)
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
path_flags (0), suffix (NULL), posix_path (NULL), error (0)
{
check (src, opt | PC_NULLEMPTY, suffixes);
}
path_conv ()
: fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
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 (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 ();
path = cstrdup (in_path);
conv_handle.dup (pc.conv_handle);
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_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; };
private:
char *modifiable_path () {return (char *) path;}
};
/* 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 *, const char *, bool);
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