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Diffstat (limited to 'winsup/cygwin/fhandler.cc')
-rw-r--r--winsup/cygwin/fhandler.cc206
1 files changed, 166 insertions, 40 deletions
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index af9d63313..f1dfed8c4 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -28,6 +28,8 @@ details. */
#include <assert.h>
#include <limits.h>
#include <winioctl.h>
+#include <ntdef.h>
+#include "ntdll.h"
static NO_COPY const int CHUNK_SIZE = 1024; /* Used for crlf conversions */
@@ -425,7 +427,7 @@ done:
/* Open system call handler function. */
int
-fhandler_base::open (int flags, mode_t mode)
+fhandler_base::open_9x (int flags, mode_t mode)
{
int res = 0;
HANDLE x;
@@ -435,7 +437,7 @@ fhandler_base::open (int flags, mode_t mode)
SECURITY_ATTRIBUTES sa = sec_none;
security_descriptor sd;
- syscall_printf ("(%s, %p) query_open %d", get_win32_name (), flags, query_open ());
+ syscall_printf ("(%s, %p)", get_win32_name (), flags);
if (get_win32_name () == NULL)
{
@@ -443,34 +445,12 @@ fhandler_base::open (int flags, mode_t mode)
goto done;
}
- switch (query_open ())
- {
- case query_null_access:
- access = 0;
- break;
- case query_read_control:
- access = READ_CONTROL;
- break;
- case query_write_control:
- access = READ_CONTROL | WRITE_OWNER | WRITE_DAC;
- break;
- default:
- if (get_major () == DEV_TAPE_MAJOR)
- access = GENERIC_READ | GENERIC_WRITE;
- else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
- access = GENERIC_READ;
- else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
- access = GENERIC_WRITE;
- else
- access = GENERIC_READ | GENERIC_WRITE;
- break;
- }
-
- /* Allow reliable lseek on disk devices. */
- if (get_major () == DEV_FLOPPY_MAJOR)
- access |= GENERIC_READ;
-
- /* FIXME: O_EXCL handling? */
+ if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
+ access = GENERIC_READ;
+ else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
+ access = GENERIC_WRITE;
+ else
+ access = GENERIC_READ | GENERIC_WRITE;
if ((flags & O_TRUNC) && ((flags & O_ACCMODE) != O_RDONLY))
{
@@ -508,16 +488,6 @@ fhandler_base::open (int flags, mode_t mode)
}
#endif
- /* CreateFile() with dwDesiredAccess == 0 when called on remote
- share returns some handle, even if file doesn't exist. This code
- works around this bug. */
- if (query_open () && isremote () &&
- creation_distribution == OPEN_EXISTING && !pc.exists ())
- {
- set_errno (ENOENT);
- goto done;
- }
-
/* If mode has no write bits set, we set the R/O attribute. */
if (!(mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
file_attributes |= FILE_ATTRIBUTE_READONLY;
@@ -564,6 +534,162 @@ done:
return res;
}
+/* Open system call handler function. */
+int
+fhandler_base::open (int flags, mode_t mode)
+{
+ if (!wincap.is_winnt ())
+ return fhandler_base::open_9x (flags, mode);
+
+ int res = 0;
+ HANDLE x;
+ ULONG file_attributes = 0;
+ ULONG shared = wincap.shared ();
+ ULONG create_disposition;
+ ULONG create_options;
+ SECURITY_ATTRIBUTES sa = sec_none;
+ security_descriptor sd;
+ UNICODE_STRING upath;
+ WCHAR wpath[CYG_MAX_PATH + 10];
+ OBJECT_ATTRIBUTES attr;
+ IO_STATUS_BLOCK io;
+ NTSTATUS status;
+
+ syscall_printf ("(%s, %p)", get_win32_name (), flags);
+ if (get_win32_name () == NULL)
+ {
+ set_errno (ENOENT);
+ goto done;
+ }
+ if (get_win32_name ()[0] == '\\')
+ {
+ if (get_win32_name ()[1] == '\\')
+ {
+ str2buf2uni (upath, wpath, "\\??\\UNC");
+ str2buf2uni_cat (upath, get_win32_name () + 1);
+ }
+ else
+ str2buf2uni (upath, wpath, get_win32_name ());
+ }
+ else
+ {
+ str2buf2uni (upath, wpath, "\\??\\");
+ str2buf2uni_cat (upath, get_win32_name ());
+ }
+ InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE | OBJ_INHERIT,
+ sa.lpSecurityDescriptor, NULL);
+
+ switch (query_open ())
+ {
+ case query_read_control:
+ access = READ_CONTROL;
+ create_options = FILE_OPEN_FOR_BACKUP_INTENT;
+ break;
+ case query_stat_control:
+ access = READ_CONTROL | FILE_READ_ATTRIBUTES;
+ create_options = FILE_OPEN_FOR_BACKUP_INTENT;
+ break;
+ case query_write_control:
+ access = READ_CONTROL | WRITE_OWNER | WRITE_DAC;
+ create_options = FILE_OPEN_FOR_BACKUP_INTENT | FILE_OPEN_FOR_RECOVERY;
+ break;
+ default:
+ create_options = 0;
+ if (get_major () == DEV_TAPE_MAJOR && (flags & O_TEXT))
+ {
+ /* O_TEXT is used to indicate write-through on tape devices */
+ create_options |= FILE_WRITE_THROUGH;
+ flags &= ~O_TEXT;
+ }
+ if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
+ access = GENERIC_READ;
+ else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
+ access = GENERIC_WRITE;
+ else
+ access = GENERIC_READ | GENERIC_WRITE;
+ /* Allow reliable lseek on disk devices. */
+ if (get_major () == DEV_FLOPPY_MAJOR)
+ access |= GENERIC_READ;
+ else if (get_major () != DEV_SERIAL_MAJOR)
+ {
+ create_options |= FILE_SYNCHRONOUS_IO_NONALERT;
+ access |= SYNCHRONIZE;
+ }
+ break;
+ }
+
+ if ((flags & O_TRUNC) && ((flags & O_ACCMODE) != O_RDONLY))
+ {
+ if (flags & O_CREAT)
+ create_disposition = FILE_SUPERSEDE;
+ else
+ create_disposition = FILE_OVERWRITE;
+ }
+ else if (flags & O_CREAT)
+ create_disposition = FILE_OPEN_IF;
+ else
+ create_disposition = FILE_OPEN;
+
+ if ((flags & O_EXCL) && (flags & O_CREAT))
+ create_disposition = FILE_CREATE;
+
+ if (flags & O_APPEND)
+ append_mode (true);
+
+ if (flags & O_CREAT && get_device () == FH_FS)
+ {
+ file_attributes = FILE_ATTRIBUTE_NORMAL;
+ /* If mode has no write bits set, we set the R/O attribute. */
+ if (!(mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
+ file_attributes |= FILE_ATTRIBUTE_READONLY;
+#ifdef HIDDEN_DOT_FILES
+ char *c = strrchr (get_win32_name (), '\\');
+ if ((c && c[1] == '.') || *get_win32_name () == '.')
+ file_attributes |= FILE_ATTRIBUTE_HIDDEN;
+#endif
+ /* If the file should actually be created and ntsec is on,
+ set files attributes. */
+ if (allow_ntsec && has_acls ())
+ {
+ set_security_attribute (mode, &sa, sd);
+ attr.SecurityDescriptor = sa.lpSecurityDescriptor;
+ }
+ }
+
+ status = NtCreateFile (&x, access, &attr, &io, NULL, file_attributes, shared,
+ create_disposition, create_options, NULL, 0);
+ if (!NT_SUCCESS (status))
+ {
+ if (!wincap.can_open_directories () && pc.isdir ())
+ {
+ if (flags & (O_CREAT | O_EXCL) == (O_CREAT | O_EXCL))
+ set_errno (EEXIST);
+ else if (flags & (O_WRONLY | O_RDWR))
+ set_errno (EISDIR);
+ else
+ nohandle (true);
+ }
+ __seterrno_from_win_error (RtlNtStatusToDosError (status));
+ if (!nohandle ())
+ goto done;
+ }
+
+ syscall_printf ("%x = NtCreateFile "
+ "(%p, %x, %s, io, NULL, %x, %x, %x, %x, NULL, 0)",
+ status, x, access, get_win32_name (), file_attributes, shared,
+ create_disposition, create_options);
+
+ set_io_handle (x);
+ set_flags (flags, pc.binmode ());
+
+ res = 1;
+ set_open_status ();
+done:
+ syscall_printf ("%d = fhandler_base::open (%s, %p)", res, get_win32_name (),
+ flags);
+ return res;
+}
+
/* states:
open buffer in binary mode? Just do the read.
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-30 05:52:18 +0000