1726 lines
37 KiB
C++
1726 lines
37 KiB
C++
/* fhandler.cc. See console.cc for fhandler_console functions.
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/cygwin.h>
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#include <sys/uio.h>
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#include <sys/acl.h>
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#include <sys/statvfs.h>
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#include <signal.h>
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#include "cygerrno.h"
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#include "perprocess.h"
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#include "security.h"
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#include "cygwin/version.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "shared_info.h"
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#include "pinfo.h"
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#include <assert.h>
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#include <limits.h>
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#include <winioctl.h>
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#include <ntdef.h>
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#include "ntdll.h"
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#include "cygtls.h"
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#include "sigproc.h"
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static NO_COPY const int CHUNK_SIZE = 1024; /* Used for crlf conversions */
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struct __cygwin_perfile *perfile_table;
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DWORD binmode;
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inline fhandler_base&
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fhandler_base::operator =(fhandler_base& x)
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{
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memcpy (this, &x, sizeof *this);
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pc = x.pc;
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rabuf = NULL;
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ralen = 0;
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raixget = 0;
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raixput = 0;
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rabuflen = 0;
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return *this;
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}
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int
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fhandler_base::puts_readahead (const char *s, size_t len)
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{
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int success = 1;
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while ((len == (size_t) -1 ? *s : len--)
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&& (success = put_readahead (*s++) > 0))
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continue;
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return success;
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}
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int
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fhandler_base::put_readahead (char value)
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{
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char *newrabuf;
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if (raixput < rabuflen)
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/* Nothing to do */;
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else if ((newrabuf = (char *) realloc (rabuf, rabuflen += 32)))
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rabuf = newrabuf;
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else
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return 0;
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rabuf[raixput++] = value;
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ralen++;
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return 1;
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}
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int
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fhandler_base::get_readahead ()
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{
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int chret = -1;
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if (raixget < ralen)
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chret = ((unsigned char) rabuf[raixget++]) & 0xff;
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/* FIXME - not thread safe */
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if (raixget >= ralen)
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raixget = raixput = ralen = 0;
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return chret;
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}
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int
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fhandler_base::peek_readahead (int queryput)
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{
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int chret = -1;
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if (!queryput && raixget < ralen)
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chret = ((unsigned char) rabuf[raixget]) & 0xff;
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else if (queryput && raixput > 0)
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chret = ((unsigned char) rabuf[raixput - 1]) & 0xff;
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return chret;
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}
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void
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fhandler_base::set_readahead_valid (int val, int ch)
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{
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if (!val)
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ralen = raixget = raixput = 0;
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if (ch != -1)
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put_readahead (ch);
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}
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int
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fhandler_base::eat_readahead (int n)
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{
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int oralen = ralen;
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if (n < 0)
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n = ralen;
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if (n > 0 && ralen)
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{
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if ((int) (ralen -= n) < 0)
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ralen = 0;
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if (raixget >= ralen)
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raixget = raixput = ralen = 0;
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else if (raixput > ralen)
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raixput = ralen;
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}
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return oralen;
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}
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int
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fhandler_base::get_readahead_into_buffer (char *buf, size_t buflen)
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{
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int ch;
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int copied_chars = 0;
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while (buflen)
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if ((ch = get_readahead ()) < 0)
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break;
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else
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{
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buf[copied_chars++] = (unsigned char)(ch & 0xff);
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buflen--;
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}
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return copied_chars;
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}
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/* Record the file name. and name hash */
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void
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fhandler_base::set_name (path_conv &in_pc)
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{
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pc = in_pc;
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}
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char *fhandler_base::get_proc_fd_name (char *buf)
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{
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if (get_name ())
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return strcpy (buf, get_name ());
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if (dev ().name)
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return strcpy (buf, dev ().name);
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return strcpy (buf, "");
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}
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/* Detect if we are sitting at EOF for conditions where Windows
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returns an error but UNIX doesn't. */
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static int __stdcall
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is_at_eof (HANDLE h, DWORD err)
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{
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IO_STATUS_BLOCK io;
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FILE_POSITION_INFORMATION fpi;
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FILE_STANDARD_INFORMATION fsi;
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if (NT_SUCCESS (NtQueryInformationFile (h, &io, &fsi, sizeof fsi,
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FileStandardInformation))
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&& NT_SUCCESS (NtQueryInformationFile (h, &io, &fpi, sizeof fpi,
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FilePositionInformation))
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&& fsi.EndOfFile.QuadPart == fpi.CurrentByteOffset.QuadPart)
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return 1;
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SetLastError (err);
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return 0;
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}
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void
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fhandler_base::set_flags (int flags, int supplied_bin)
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{
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int bin;
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int fmode;
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debug_printf ("flags %p, supplied_bin %p", flags, supplied_bin);
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if ((bin = flags & (O_BINARY | O_TEXT)))
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debug_printf ("O_TEXT/O_BINARY set in flags %p", bin);
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else if (rbinset () && wbinset ())
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bin = rbinary () ? O_BINARY : O_TEXT; // FIXME: Not quite right
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else if ((fmode = get_default_fmode (flags)) & O_BINARY)
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bin = O_BINARY;
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else if (fmode & O_TEXT)
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bin = O_TEXT;
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else if (supplied_bin)
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bin = supplied_bin;
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else
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bin = wbinary () || rbinary () || (binmode != O_TEXT)
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? O_BINARY : O_TEXT;
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openflags = flags | bin;
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bin &= O_BINARY;
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rbinary (bin ? true : false);
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wbinary (bin ? true : false);
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syscall_printf ("filemode set to %s", bin ? "binary" : "text");
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}
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/* Normal file i/o handlers. */
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/* Cover function to ReadFile to achieve (as much as possible) Posix style
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semantics and use of errno. */
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void
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fhandler_base::raw_read (void *ptr, size_t& ulen)
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{
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#define bytes_read ulen
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int try_noreserve = 1;
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DWORD len = ulen;
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retry:
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ulen = (size_t) -1;
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BOOL res = ReadFile (get_handle (), ptr, len, (DWORD *) &ulen, NULL);
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if (!res)
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{
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/* Some errors are not really errors. Detect such cases here. */
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DWORD errcode = GetLastError ();
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switch (errcode)
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{
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case ERROR_BROKEN_PIPE:
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/* This is really EOF. */
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bytes_read = 0;
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break;
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case ERROR_MORE_DATA:
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/* `bytes_read' is supposedly valid. */
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break;
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case ERROR_NOACCESS:
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if (is_at_eof (get_handle (), errcode))
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{
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bytes_read = 0;
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break;
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}
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if (try_noreserve)
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{
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try_noreserve = 0;
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switch (mmap_is_attached_or_noreserve (ptr, len))
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{
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case MMAP_NORESERVE_COMMITED:
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goto retry;
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case MMAP_RAISE_SIGBUS:
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raise(SIGBUS);
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case MMAP_NONE:
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break;
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}
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}
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/*FALLTHRU*/
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case ERROR_INVALID_FUNCTION:
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case ERROR_INVALID_PARAMETER:
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case ERROR_INVALID_HANDLE:
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if (pc.isdir ())
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{
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set_errno (EISDIR);
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bytes_read = (size_t) -1;
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break;
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}
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default:
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syscall_printf ("ReadFile %s(%p) failed, %E", get_name (), get_handle ());
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__seterrno_from_win_error (errcode);
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bytes_read = (size_t) -1;
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break;
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}
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}
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#undef bytes_read
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}
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/* Cover function to WriteFile to provide Posix interface and semantics
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(as much as possible). */
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static LARGE_INTEGER off_current = { QuadPart:FILE_USE_FILE_POINTER_POSITION };
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static LARGE_INTEGER off_append = { QuadPart:FILE_WRITE_TO_END_OF_FILE };
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int
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fhandler_base::raw_write (const void *ptr, size_t len)
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{
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NTSTATUS status;
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IO_STATUS_BLOCK io;
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status = NtWriteFile (get_output_handle (), NULL, NULL, NULL, &io,
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(PVOID) ptr, len,
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(get_flags () & O_APPEND) ? &off_append : &off_current,
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NULL);
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if (!NT_SUCCESS (status))
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{
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if (status == STATUS_DISK_FULL && io.Information > 0)
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goto written;
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__seterrno_from_nt_status (status);
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if (get_errno () == EPIPE)
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raise (SIGPIPE);
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return -1;
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}
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written:
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return io.Information;
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}
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int
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fhandler_base::get_default_fmode (int flags)
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{
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int fmode = __fmode;
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if (perfile_table)
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{
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size_t nlen = strlen (get_name ());
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unsigned accflags = (flags & O_ACCMODE);
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for (__cygwin_perfile *pf = perfile_table; pf->name; pf++)
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if (!*pf->name && (pf->flags & O_ACCMODE) == accflags)
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{
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fmode = pf->flags & ~O_ACCMODE;
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break;
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}
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else
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{
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size_t pflen = strlen (pf->name);
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const char *stem = get_name () + nlen - pflen;
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if (pflen > nlen || (stem != get_name () && !isdirsep (stem[-1])))
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continue;
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else if ((pf->flags & O_ACCMODE) == accflags
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&& strcasematch (stem, pf->name))
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{
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fmode = pf->flags & ~O_ACCMODE;
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break;
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}
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}
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}
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return fmode;
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}
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bool
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fhandler_base::device_access_denied (int flags)
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{
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int mode = 0;
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if (flags & O_RDWR)
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mode |= R_OK | W_OK;
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if (flags & (O_WRONLY | O_APPEND))
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mode |= W_OK;
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if (!mode)
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mode |= R_OK;
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return fhaccess (mode);
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}
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int
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fhandler_base::fhaccess (int flags)
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{
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int res = -1;
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if (error ())
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{
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set_errno (error ());
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goto done;
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}
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if (!exists ())
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{
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set_errno (ENOENT);
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goto done;
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}
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if (!(flags & (R_OK | W_OK | X_OK)))
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return 0;
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if (is_fs_special ())
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/* short circuit */;
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else if (has_attribute (FILE_ATTRIBUTE_READONLY) && (flags & W_OK)
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&& !pc.isdir ())
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goto eaccess_done;
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else if (has_acls () && allow_ntsec)
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{
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res = check_file_access (pc, flags);
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goto done;
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}
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else if (get_device () == FH_REGISTRY && allow_ntsec && open (O_RDONLY, 0)
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&& get_handle ())
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{
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res = check_registry_access (get_handle (), flags);
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close ();
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return res;
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}
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struct __stat64 st;
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if (fstat (&st))
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goto done;
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if (flags & R_OK)
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{
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if (st.st_uid == myself->uid)
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{
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if (!(st.st_mode & S_IRUSR))
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goto eaccess_done;
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}
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else if (st.st_gid == myself->gid)
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{
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if (!(st.st_mode & S_IRGRP))
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goto eaccess_done;
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}
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else if (!(st.st_mode & S_IROTH))
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goto eaccess_done;
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}
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if (flags & W_OK)
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{
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if (st.st_uid == myself->uid)
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{
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if (!(st.st_mode & S_IWUSR))
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goto eaccess_done;
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}
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else if (st.st_gid == myself->gid)
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{
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if (!(st.st_mode & S_IWGRP))
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goto eaccess_done;
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}
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else if (!(st.st_mode & S_IWOTH))
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goto eaccess_done;
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}
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if (flags & X_OK)
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{
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if (st.st_uid == myself->uid)
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{
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if (!(st.st_mode & S_IXUSR))
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goto eaccess_done;
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}
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else if (st.st_gid == myself->gid)
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{
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if (!(st.st_mode & S_IXGRP))
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goto eaccess_done;
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}
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else if (!(st.st_mode & S_IXOTH))
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goto eaccess_done;
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}
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res = 0;
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goto done;
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eaccess_done:
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set_errno (EACCES);
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done:
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if (!res && (flags & W_OK) && get_device () == FH_FS
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&& (pc.fs_flags () & FILE_READ_ONLY_VOLUME))
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{
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set_errno (EROFS);
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res = -1;
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}
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debug_printf ("returning %d", res);
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return res;
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}
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|
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/* Open system call handler function. */
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int
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fhandler_base::open (int flags, mode_t mode)
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{
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int res = 0;
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HANDLE x;
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ULONG file_attributes = 0;
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ULONG shared = (get_major () == DEV_TAPE_MAJOR ? 0 : FILE_SHARE_VALID_FLAGS);
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ULONG create_disposition;
|
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ULONG create_options;
|
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SECURITY_ATTRIBUTES sa = sec_none;
|
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security_descriptor sd;
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OBJECT_ATTRIBUTES attr;
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IO_STATUS_BLOCK io;
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NTSTATUS status;
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|
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syscall_printf ("(%S, %p)", pc.get_nt_native_path (), flags);
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|
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pc.get_object_attr (attr, sa);
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|
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switch (query_open ())
|
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{
|
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case query_read_control:
|
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access = READ_CONTROL;
|
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create_options = FILE_OPEN_FOR_BACKUP_INTENT;
|
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break;
|
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case query_read_attributes:
|
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access = READ_CONTROL | FILE_READ_ATTRIBUTES;
|
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create_options = FILE_OPEN_FOR_BACKUP_INTENT;
|
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break;
|
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case query_write_control:
|
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access = READ_CONTROL | WRITE_OWNER | WRITE_DAC | FILE_WRITE_ATTRIBUTES;
|
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create_options = FILE_OPEN_FOR_BACKUP_INTENT | FILE_OPEN_FOR_RECOVERY;
|
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break;
|
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case query_write_attributes:
|
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access = READ_CONTROL | FILE_WRITE_ATTRIBUTES;
|
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create_options = FILE_OPEN_FOR_BACKUP_INTENT | FILE_OPEN_FOR_RECOVERY;
|
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break;
|
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default:
|
|
if ((flags & O_ACCMODE) == O_RDONLY)
|
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{
|
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access = GENERIC_READ;
|
|
create_options = FILE_OPEN_FOR_BACKUP_INTENT;
|
|
}
|
|
else if ((flags & O_ACCMODE) == O_WRONLY)
|
|
{
|
|
access = GENERIC_WRITE | READ_CONTROL | FILE_READ_ATTRIBUTES;
|
|
create_options = FILE_OPEN_FOR_BACKUP_INTENT
|
|
| FILE_OPEN_FOR_RECOVERY;
|
|
}
|
|
else
|
|
{
|
|
access = GENERIC_READ | GENERIC_WRITE;
|
|
create_options = FILE_OPEN_FOR_BACKUP_INTENT
|
|
| FILE_OPEN_FOR_RECOVERY;
|
|
}
|
|
if (flags & O_SYNC)
|
|
create_options |= FILE_WRITE_THROUGH;
|
|
if (flags & O_DIRECT)
|
|
create_options |= FILE_NO_INTERMEDIATE_BUFFERING;
|
|
if (get_major () != DEV_SERIAL_MAJOR && get_major () != DEV_TAPE_MAJOR)
|
|
{
|
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create_options |= FILE_SYNCHRONOUS_IO_NONALERT;
|
|
access |= SYNCHRONIZE;
|
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}
|
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break;
|
|
}
|
|
|
|
if ((flags & O_TRUNC) && ((flags & O_ACCMODE) != O_RDONLY))
|
|
{
|
|
if (flags & O_CREAT)
|
|
create_disposition = FILE_OVERWRITE_IF;
|
|
else
|
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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 (get_device () == FH_FS)
|
|
{
|
|
/* Add the reparse point flag to native symlinks, otherwise we open the
|
|
target, not the symlink. This would break lstat. */
|
|
if (pc.is_rep_symlink ())
|
|
create_options |= FILE_OPEN_REPARSE_POINT;
|
|
|
|
if (flags & O_CREAT)
|
|
{
|
|
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;
|
|
/* Starting with Windows 2000, when trying to overwrite an already
|
|
existing file with FILE_ATTRIBUTE_HIDDEN and/or FILE_ATTRIBUTE_SYSTEM
|
|
attribute set, CreateFile fails with ERROR_ACCESS_DENIED.
|
|
Per MSDN you have to create the file with the same attributes as
|
|
already specified for the file. */
|
|
if (has_attribute (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM))
|
|
file_attributes |= pc.file_attributes ();
|
|
|
|
/* If the file should actually be created and ntsec is on,
|
|
set files attributes. */
|
|
/* TODO: Don't remove the call to has_acls() unless there's a
|
|
solution for the security descriptor problem on remote samba
|
|
drives. The local user SID is used in set_security_attribute,
|
|
but the actual owner on the Samba share is the SID of the Unix
|
|
account. There's no transparent mapping between these accounts.
|
|
And Samba has a strange behaviour when creating a file. Apparently
|
|
it *first* creates the file, *then* it looks if the security
|
|
descriptor matches. The result is that the file gets created, but
|
|
then NtCreateFile doesn't return a handle to the file and fails
|
|
with STATUS_ACCESS_DENIED. Go figure! */
|
|
if (allow_ntsec && has_acls ())
|
|
{
|
|
set_security_attribute (mode, &sa, sd);
|
|
attr.SecurityDescriptor = sa.lpSecurityDescriptor;
|
|
}
|
|
/* The file attributes are needed for later use in, e.g. fchmod. */
|
|
pc.file_attributes (file_attributes);
|
|
}
|
|
}
|
|
|
|
status = NtCreateFile (&x, access, &attr, &io, NULL, file_attributes, shared,
|
|
create_disposition, create_options, NULL, 0);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
if (!nohandle ())
|
|
goto done;
|
|
}
|
|
|
|
set_io_handle (x);
|
|
set_flags (flags, pc.binmode ());
|
|
|
|
res = 1;
|
|
set_open_status ();
|
|
done:
|
|
debug_printf ("%x = NtCreateFile "
|
|
"(%p, %x, %S, io, NULL, %x, %x, %x, %x, NULL, 0)",
|
|
status, x, access, pc.get_nt_native_path (), file_attributes,
|
|
shared, create_disposition, create_options);
|
|
|
|
syscall_printf ("%d = fhandler_base::open (%s, %p)",
|
|
res, pc.get_nt_native_path (), flags);
|
|
return res;
|
|
}
|
|
|
|
/* states:
|
|
open buffer in binary mode? Just do the read.
|
|
|
|
open buffer in text mode? Scan buffer for control zs and handle
|
|
the first one found. Then scan buffer, converting every \r\n into
|
|
an \n. If last char is an \r, look ahead one more char, if \n then
|
|
modify \r, if not, remember char.
|
|
*/
|
|
void
|
|
fhandler_base::read (void *in_ptr, size_t& len)
|
|
{
|
|
char *ptr = (char *) in_ptr;
|
|
ssize_t copied_chars = get_readahead_into_buffer (ptr, len);
|
|
|
|
if (copied_chars && is_slow ())
|
|
{
|
|
len = (size_t) copied_chars;
|
|
goto out;
|
|
}
|
|
|
|
len -= copied_chars;
|
|
if (!len)
|
|
{
|
|
len = (size_t) copied_chars;
|
|
goto out;
|
|
}
|
|
|
|
raw_read (ptr + copied_chars, len);
|
|
if (!copied_chars)
|
|
/* nothing */;
|
|
else if ((ssize_t) len > 0)
|
|
len += copied_chars;
|
|
else
|
|
len = copied_chars;
|
|
|
|
if (rbinary () || len <= 0)
|
|
goto out;
|
|
|
|
/* Scan buffer and turn \r\n into \n */
|
|
char *src, *dst, *end;
|
|
src = (char *) ptr;
|
|
dst = (char *) ptr;
|
|
end = src + len - 1;
|
|
|
|
/* Read up to the last but one char - the last char needs special handling */
|
|
while (src < end)
|
|
{
|
|
if (*src == '\r' && src[1] == '\n')
|
|
src++;
|
|
*dst++ = *src++;
|
|
}
|
|
|
|
/* If not beyond end and last char is a '\r' then read one more
|
|
to see if we should translate this one too */
|
|
if (src > end)
|
|
/* nothing */;
|
|
else if (*src != '\r')
|
|
*dst++ = *src;
|
|
else
|
|
{
|
|
char c1;
|
|
size_t c1len = 1;
|
|
raw_read (&c1, c1len);
|
|
if (c1len <= 0)
|
|
/* nothing */;
|
|
else if (c1 == '\n')
|
|
*dst++ = '\n';
|
|
else
|
|
{
|
|
set_readahead_valid (1, c1);
|
|
*dst++ = *src;
|
|
}
|
|
}
|
|
|
|
len = dst - (char *) ptr;
|
|
|
|
#ifndef NOSTRACE
|
|
if (strace.active ())
|
|
{
|
|
char buf[16 * 6 + 1];
|
|
char *p = buf;
|
|
|
|
for (int i = 0; i < copied_chars && i < 16; ++i)
|
|
{
|
|
unsigned char c = ((unsigned char *) ptr)[i];
|
|
__small_sprintf (p, " %c", c);
|
|
p += strlen (p);
|
|
}
|
|
*p = '\0';
|
|
debug_printf ("read %d bytes (%s%s)", copied_chars, buf,
|
|
copied_chars > 16 ? " ..." : "");
|
|
}
|
|
#endif
|
|
|
|
out:
|
|
debug_printf ("returning %d, %s mode", len, rbinary () ? "binary" : "text");
|
|
}
|
|
|
|
int
|
|
fhandler_base::write (const void *ptr, size_t len)
|
|
{
|
|
int res;
|
|
IO_STATUS_BLOCK io;
|
|
FILE_POSITION_INFORMATION fpi;
|
|
FILE_STANDARD_INFORMATION fsi;
|
|
|
|
if (did_lseek ())
|
|
{
|
|
did_lseek (false); /* don't do it again */
|
|
|
|
if (!(get_flags () & O_APPEND)
|
|
&& NT_SUCCESS (NtQueryInformationFile (get_output_handle (),
|
|
&io, &fsi, sizeof fsi,
|
|
FileStandardInformation))
|
|
&& NT_SUCCESS (NtQueryInformationFile (get_output_handle (),
|
|
&io, &fpi, sizeof fpi,
|
|
FilePositionInformation))
|
|
&& fpi.CurrentByteOffset.QuadPart
|
|
>= fsi.EndOfFile.QuadPart + (128 * 1024)
|
|
&& get_fs_flags (FILE_SUPPORTS_SPARSE_FILES))
|
|
{
|
|
/* If the file system supports sparse files and the application
|
|
is writing after a long seek beyond EOF, convert the file to
|
|
a sparse file. */
|
|
NTSTATUS status;
|
|
status = NtFsControlFile (get_output_handle (), NULL, NULL, NULL,
|
|
&io, FSCTL_SET_SPARSE, NULL, 0, NULL, 0);
|
|
syscall_printf ("%p = NtFsControlFile(%S, FSCTL_SET_SPARSE)",
|
|
status, pc.get_nt_native_path ());
|
|
}
|
|
}
|
|
|
|
if (wbinary ())
|
|
{
|
|
debug_printf ("binary write");
|
|
res = raw_write (ptr, len);
|
|
}
|
|
else
|
|
{
|
|
debug_printf ("text write");
|
|
/* This is the Microsoft/DJGPP way. Still not ideal, but it's
|
|
compatible.
|
|
Modified slightly by CGF 2000-10-07 */
|
|
|
|
int left_in_data = len;
|
|
char *data = (char *)ptr;
|
|
res = 0;
|
|
|
|
while (left_in_data > 0)
|
|
{
|
|
char buf[CHUNK_SIZE + 1], *buf_ptr = buf;
|
|
int left_in_buf = CHUNK_SIZE;
|
|
|
|
while (left_in_buf > 0 && left_in_data > 0)
|
|
{
|
|
char ch = *data++;
|
|
if (ch == '\n')
|
|
{
|
|
*buf_ptr++ = '\r';
|
|
left_in_buf--;
|
|
}
|
|
*buf_ptr++ = ch;
|
|
left_in_buf--;
|
|
left_in_data--;
|
|
if (left_in_data > 0 && ch == '\r' && *data == '\n')
|
|
{
|
|
*buf_ptr++ = *data++;
|
|
left_in_buf--;
|
|
left_in_data--;
|
|
}
|
|
}
|
|
|
|
/* We've got a buffer-full, or we're out of data. Write it out */
|
|
int nbytes;
|
|
int want = buf_ptr - buf;
|
|
if ((nbytes = raw_write (buf, want)) == want)
|
|
{
|
|
/* Keep track of how much written not counting additional \r's */
|
|
res = data - (char *)ptr;
|
|
continue;
|
|
}
|
|
|
|
if (nbytes == -1)
|
|
res = -1; /* Error */
|
|
else
|
|
res += nbytes; /* Partial write. Return total bytes written. */
|
|
break; /* All done */
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
ssize_t
|
|
fhandler_base::readv (const struct iovec *const iov, const int iovcnt,
|
|
ssize_t tot)
|
|
{
|
|
assert (iov);
|
|
assert (iovcnt >= 1);
|
|
|
|
size_t len = tot;
|
|
if (iovcnt == 1)
|
|
{
|
|
len = iov->iov_len;
|
|
read (iov->iov_base, len);
|
|
return len;
|
|
}
|
|
|
|
if (tot == -1) // i.e. if not pre-calculated by the caller.
|
|
{
|
|
len = 0;
|
|
const struct iovec *iovptr = iov + iovcnt;
|
|
do
|
|
{
|
|
iovptr -= 1;
|
|
len += iovptr->iov_len;
|
|
}
|
|
while (iovptr != iov);
|
|
}
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
char *buf = (char *) malloc (len);
|
|
|
|
if (!buf)
|
|
{
|
|
set_errno (ENOMEM);
|
|
return -1;
|
|
}
|
|
|
|
read (buf, len);
|
|
ssize_t nbytes = (ssize_t) len;
|
|
|
|
const struct iovec *iovptr = iov;
|
|
|
|
char *p = buf;
|
|
while (nbytes > 0)
|
|
{
|
|
const int frag = min (nbytes, (ssize_t) iovptr->iov_len);
|
|
memcpy (iovptr->iov_base, p, frag);
|
|
p += frag;
|
|
iovptr += 1;
|
|
nbytes -= frag;
|
|
}
|
|
|
|
free (buf);
|
|
return len;
|
|
}
|
|
|
|
ssize_t
|
|
fhandler_base::writev (const struct iovec *const iov, const int iovcnt,
|
|
ssize_t tot)
|
|
{
|
|
assert (iov);
|
|
assert (iovcnt >= 1);
|
|
|
|
if (iovcnt == 1)
|
|
return write (iov->iov_base, iov->iov_len);
|
|
|
|
if (tot == -1) // i.e. if not pre-calculated by the caller.
|
|
{
|
|
tot = 0;
|
|
const struct iovec *iovptr = iov + iovcnt;
|
|
do
|
|
{
|
|
iovptr -= 1;
|
|
tot += iovptr->iov_len;
|
|
}
|
|
while (iovptr != iov);
|
|
}
|
|
|
|
assert (tot >= 0);
|
|
|
|
if (tot == 0)
|
|
return 0;
|
|
|
|
char *const buf = (char *) malloc (tot);
|
|
|
|
if (!buf)
|
|
{
|
|
set_errno (ENOMEM);
|
|
return -1;
|
|
}
|
|
|
|
char *bufptr = buf;
|
|
const struct iovec *iovptr = iov;
|
|
int nbytes = tot;
|
|
|
|
while (nbytes != 0)
|
|
{
|
|
const int frag = min (nbytes, (ssize_t) iovptr->iov_len);
|
|
memcpy (bufptr, iovptr->iov_base, frag);
|
|
bufptr += frag;
|
|
iovptr += 1;
|
|
nbytes -= frag;
|
|
}
|
|
ssize_t ret = write (buf, tot);
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_base::lseek (_off64_t offset, int whence)
|
|
{
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK io;
|
|
FILE_POSITION_INFORMATION fpi;
|
|
FILE_STANDARD_INFORMATION fsi;
|
|
|
|
/* Seeks on text files is tough, we rewind and read till we get to the
|
|
right place. */
|
|
|
|
if (whence != SEEK_CUR || offset != 0)
|
|
{
|
|
if (whence == SEEK_CUR)
|
|
offset -= ralen - raixget;
|
|
set_readahead_valid (0);
|
|
}
|
|
|
|
switch (whence)
|
|
{
|
|
case SEEK_SET:
|
|
fpi.CurrentByteOffset.QuadPart = offset;
|
|
break;
|
|
case SEEK_CUR:
|
|
status = NtQueryInformationFile (get_handle (), &io, &fpi, sizeof fpi,
|
|
FilePositionInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
fpi.CurrentByteOffset.QuadPart += offset;
|
|
break;
|
|
default: /* SEEK_END */
|
|
status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
|
|
FileStandardInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
fpi.CurrentByteOffset.QuadPart = fsi.EndOfFile.QuadPart + offset;
|
|
break;
|
|
}
|
|
|
|
debug_printf ("setting file pointer to %U", fpi.CurrentByteOffset.QuadPart);
|
|
status = NtSetInformationFile (get_handle (), &io, &fpi, sizeof fpi,
|
|
FilePositionInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
_off64_t res = fpi.CurrentByteOffset.QuadPart;
|
|
|
|
/* When next we write(), we will check to see if *this* seek went beyond
|
|
the end of the file and if so, potentially sparsify the file. */
|
|
did_lseek (true);
|
|
|
|
/* If this was a SEEK_CUR with offset 0, we still might have
|
|
readahead that we have to take into account when calculating
|
|
the actual position for the application. */
|
|
if (whence == SEEK_CUR)
|
|
res -= ralen - raixget;
|
|
|
|
return res;
|
|
}
|
|
|
|
ssize_t __stdcall
|
|
fhandler_base::pread (void *, size_t, _off64_t)
|
|
{
|
|
set_errno (ESPIPE);
|
|
return -1;
|
|
}
|
|
|
|
ssize_t __stdcall
|
|
fhandler_base::pwrite (void *, size_t, _off64_t)
|
|
{
|
|
set_errno (ESPIPE);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::close ()
|
|
{
|
|
int res = -1;
|
|
|
|
syscall_printf ("closing '%s' handle %p", get_name (), get_handle ());
|
|
if (nohandle () || CloseHandle (get_handle ()))
|
|
res = 0;
|
|
else
|
|
{
|
|
paranoid_printf ("CloseHandle (%d <%s>) failed", get_handle (),
|
|
get_name ());
|
|
|
|
__seterrno ();
|
|
}
|
|
destroy_overlapped ();
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_base::ioctl (unsigned int cmd, void *buf)
|
|
{
|
|
int res;
|
|
|
|
switch (cmd)
|
|
{
|
|
case FIONBIO:
|
|
set_nonblocking (*(int *) buf);
|
|
res = 0;
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
res = -1;
|
|
break;
|
|
}
|
|
|
|
syscall_printf ("%d = ioctl (%x, %p)", res, cmd, buf);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_base::lock (int, struct __flock64 *)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_base::fstat (struct __stat64 *buf)
|
|
{
|
|
debug_printf ("here");
|
|
|
|
if (is_fs_special ())
|
|
return fstat_fs (buf);
|
|
|
|
switch (get_device ())
|
|
{
|
|
case FH_PIPE:
|
|
buf->st_mode = S_IFIFO | S_IRUSR | S_IWUSR;
|
|
break;
|
|
case FH_PIPEW:
|
|
buf->st_mode = S_IFIFO | S_IWUSR;
|
|
break;
|
|
case FH_PIPER:
|
|
buf->st_mode = S_IFIFO | S_IRUSR;
|
|
break;
|
|
case FH_FULL:
|
|
buf->st_mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
|
|
break;
|
|
default:
|
|
buf->st_mode = S_IFCHR | STD_RBITS | STD_WBITS | S_IWGRP | S_IWOTH;
|
|
break;
|
|
}
|
|
|
|
buf->st_uid = geteuid32 ();
|
|
buf->st_gid = getegid32 ();
|
|
buf->st_nlink = 1;
|
|
buf->st_blksize = PREFERRED_IO_BLKSIZE;
|
|
buf->st_ctim.tv_sec = 1164931200L; /* Arbitrary value: 2006-12-01 */
|
|
buf->st_ctim.tv_nsec = 0L;
|
|
buf->st_atim = buf->st_mtim = buf->st_birthtim = buf->st_ctim;
|
|
return 0;
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_base::fstatvfs (struct statvfs *sfs)
|
|
{
|
|
/* If we hit this base implementation, it's some device in /dev.
|
|
Just call statvfs on /dev for simplicity. */
|
|
path_conv pc ("/dev");
|
|
fhandler_disk_file fh (pc);
|
|
return fh.fstatvfs (sfs);
|
|
}
|
|
|
|
void
|
|
fhandler_base::init (HANDLE f, DWORD a, mode_t bin)
|
|
{
|
|
set_io_handle (f);
|
|
access = a;
|
|
a &= GENERIC_READ | GENERIC_WRITE;
|
|
int flags = 0;
|
|
if (a == GENERIC_READ)
|
|
flags = O_RDONLY;
|
|
else if (a == GENERIC_WRITE)
|
|
flags = O_WRONLY;
|
|
else if (a == (GENERIC_READ | GENERIC_WRITE))
|
|
flags = O_RDWR;
|
|
set_flags (flags | bin);
|
|
set_open_status ();
|
|
debug_printf ("created new fhandler_base for handle %p, bin %d", f, rbinary ());
|
|
}
|
|
|
|
int
|
|
fhandler_base::dup (fhandler_base *child)
|
|
{
|
|
debug_printf ("in fhandler_base dup");
|
|
|
|
HANDLE nh;
|
|
if (!nohandle ())
|
|
{
|
|
if (!DuplicateHandle (hMainProc, get_handle (), hMainProc, &nh, 0, TRUE,
|
|
DUPLICATE_SAME_ACCESS))
|
|
{
|
|
debug_printf ("dup(%s) failed, handle %x, %E",
|
|
get_name (), get_handle ());
|
|
__seterrno ();
|
|
return -1;
|
|
}
|
|
|
|
VerifyHandle (nh);
|
|
child->set_io_handle (nh);
|
|
}
|
|
if (get_overlapped ())
|
|
child->setup_overlapped ();
|
|
set_flags (child->get_flags ());
|
|
return 0;
|
|
}
|
|
|
|
int fhandler_base::fcntl (int cmd, void *arg)
|
|
{
|
|
int res;
|
|
|
|
switch (cmd)
|
|
{
|
|
case F_GETFD:
|
|
res = close_on_exec () ? FD_CLOEXEC : 0;
|
|
break;
|
|
case F_SETFD:
|
|
set_close_on_exec (((int) arg & FD_CLOEXEC) ? 1 : 0);
|
|
res = 0;
|
|
break;
|
|
case F_GETFL:
|
|
res = get_flags ();
|
|
debug_printf ("GETFL: %p", res);
|
|
break;
|
|
case F_SETFL:
|
|
{
|
|
/*
|
|
* Only O_APPEND, O_ASYNC and O_NONBLOCK/O_NDELAY are allowed.
|
|
* Each other flag will be ignored.
|
|
* Since O_ASYNC isn't defined in fcntl.h it's currently
|
|
* ignored as well.
|
|
*/
|
|
const int allowed_flags = O_APPEND | O_NONBLOCK_MASK;
|
|
int new_flags = (int) arg & allowed_flags;
|
|
/* Carefully test for the O_NONBLOCK or deprecated OLD_O_NDELAY flag.
|
|
Set only the flag that has been passed in. If both are set, just
|
|
record O_NONBLOCK. */
|
|
if ((new_flags & OLD_O_NDELAY) && (new_flags & O_NONBLOCK))
|
|
new_flags &= ~OLD_O_NDELAY;
|
|
set_flags ((get_flags () & ~allowed_flags) | new_flags);
|
|
}
|
|
res = 0;
|
|
break;
|
|
case F_GETLK:
|
|
case F_SETLK:
|
|
case F_SETLKW:
|
|
res = lock (cmd, (struct __flock64 *) arg);
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
res = -1;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* Base terminal handlers. These just return errors. */
|
|
|
|
int
|
|
fhandler_base::tcflush (int)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcsendbreak (int)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcdrain ()
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcflow (int)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcsetattr (int, const struct termios *)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcgetattr (struct termios *)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcsetpgrp (const pid_t)
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::tcgetpgrp ()
|
|
{
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
void
|
|
fhandler_base::operator delete (void *p)
|
|
{
|
|
cfree (p);
|
|
}
|
|
|
|
/* Normal I/O constructor */
|
|
fhandler_base::fhandler_base () :
|
|
status (),
|
|
open_status (),
|
|
access (0),
|
|
io_handle (NULL),
|
|
namehash (0),
|
|
openflags (0),
|
|
rabuf (NULL),
|
|
ralen (0),
|
|
raixget (0),
|
|
raixput (0),
|
|
rabuflen (0),
|
|
fs_flags (0),
|
|
archetype (NULL),
|
|
usecount (0)
|
|
{
|
|
}
|
|
|
|
/* Normal I/O destructor */
|
|
fhandler_base::~fhandler_base ()
|
|
{
|
|
if (rabuf)
|
|
free (rabuf);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
/* /dev/null */
|
|
|
|
fhandler_dev_null::fhandler_dev_null () :
|
|
fhandler_base ()
|
|
{
|
|
}
|
|
|
|
void
|
|
fhandler_base::set_no_inheritance (HANDLE &h, bool not_inheriting)
|
|
{
|
|
if (!SetHandleInformation (h, HANDLE_FLAG_INHERIT,
|
|
not_inheriting ? 0 : HANDLE_FLAG_INHERIT))
|
|
debug_printf ("SetHandleInformation failed, %E");
|
|
#ifdef DEBUGGING_AND_FDS_PROTECTED
|
|
if (h)
|
|
setclexec (oh, h, not_inheriting);
|
|
#endif
|
|
}
|
|
|
|
bool
|
|
fhandler_base::fork_fixup (HANDLE parent, HANDLE &h, const char *name)
|
|
{
|
|
HANDLE oh = h;
|
|
bool res = false;
|
|
if (/* !is_socket () && */ !close_on_exec ())
|
|
debug_printf ("handle %p already opened", h);
|
|
else if (!DuplicateHandle (parent, h, hMainProc, &h, 0, !close_on_exec (),
|
|
DUPLICATE_SAME_ACCESS))
|
|
system_printf ("%s - %E, handle %s<%p>", get_name (), name, h);
|
|
else
|
|
{
|
|
if (oh != h)
|
|
VerifyHandle (h);
|
|
res = true;
|
|
}
|
|
if (get_overlapped ())
|
|
setup_overlapped ();
|
|
return res;
|
|
}
|
|
|
|
void
|
|
fhandler_base::set_close_on_exec (bool val)
|
|
{
|
|
if (!nohandle ())
|
|
set_no_inheritance (io_handle, val);
|
|
close_on_exec (val);
|
|
debug_printf ("set close_on_exec for %s to %d", get_name (), val);
|
|
}
|
|
|
|
void
|
|
fhandler_base::fixup_after_fork (HANDLE parent)
|
|
{
|
|
debug_printf ("inheriting '%s' from parent", get_name ());
|
|
if (!nohandle ())
|
|
fork_fixup (parent, io_handle, "io_handle");
|
|
if (get_overlapped ())
|
|
setup_overlapped ();
|
|
}
|
|
|
|
void
|
|
fhandler_base::fixup_after_exec ()
|
|
{
|
|
debug_printf ("here for '%s'", get_name ());
|
|
if (get_overlapped ())
|
|
setup_overlapped ();
|
|
}
|
|
|
|
bool
|
|
fhandler_base::is_nonblocking ()
|
|
{
|
|
return (openflags & O_NONBLOCK_MASK) != 0;
|
|
}
|
|
|
|
void
|
|
fhandler_base::set_nonblocking (int yes)
|
|
{
|
|
int current = openflags & O_NONBLOCK_MASK;
|
|
int new_flags = yes ? (!current ? O_NONBLOCK : current) : 0;
|
|
openflags = (openflags & ~O_NONBLOCK_MASK) | new_flags;
|
|
}
|
|
|
|
int
|
|
fhandler_base::mkdir (mode_t)
|
|
{
|
|
if (exists ())
|
|
set_errno (EEXIST);
|
|
else
|
|
set_errno (EROFS);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::rmdir ()
|
|
{
|
|
if (!exists ())
|
|
set_errno (ENOENT);
|
|
else if (!pc.isdir ())
|
|
set_errno (ENOTDIR);
|
|
else
|
|
set_errno (EROFS);
|
|
return -1;
|
|
}
|
|
|
|
DIR *
|
|
fhandler_base::opendir (int fd)
|
|
{
|
|
set_errno (ENOTDIR);
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
fhandler_base::readdir (DIR *, dirent *)
|
|
{
|
|
return ENOTDIR;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_base::telldir (DIR *)
|
|
{
|
|
set_errno (ENOTDIR);
|
|
return -1;
|
|
}
|
|
|
|
void
|
|
fhandler_base::seekdir (DIR *, _off64_t)
|
|
{
|
|
set_errno (ENOTDIR);
|
|
}
|
|
|
|
void
|
|
fhandler_base::rewinddir (DIR *)
|
|
{
|
|
set_errno (ENOTDIR);
|
|
}
|
|
|
|
int
|
|
fhandler_base::closedir (DIR *)
|
|
{
|
|
set_errno (ENOTDIR);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fchmod (mode_t mode)
|
|
{
|
|
extern int chmod_device (path_conv& pc, mode_t mode);
|
|
if (pc.is_fs_special ())
|
|
return chmod_device (pc, mode);
|
|
/* By default, just succeeds. */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fchown (__uid32_t uid, __gid32_t gid)
|
|
{
|
|
if (pc.is_fs_special ())
|
|
return ((fhandler_disk_file *) this)->fhandler_disk_file::fchown (uid, gid);
|
|
/* By default, just succeeds. */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fhandler_base::facl (int cmd, int nentries, __aclent32_t *aclbufp)
|
|
{
|
|
int res = -1;
|
|
switch (cmd)
|
|
{
|
|
case SETACL:
|
|
/* By default, just succeeds. */
|
|
res = 0;
|
|
break;
|
|
case GETACL:
|
|
if (!aclbufp)
|
|
set_errno(EFAULT);
|
|
else if (nentries < MIN_ACL_ENTRIES)
|
|
set_errno (ENOSPC);
|
|
else
|
|
{
|
|
aclbufp[0].a_type = USER_OBJ;
|
|
aclbufp[0].a_id = myself->uid;
|
|
aclbufp[0].a_perm = (S_IRUSR | S_IWUSR) >> 6;
|
|
aclbufp[1].a_type = GROUP_OBJ;
|
|
aclbufp[1].a_id = myself->gid;
|
|
aclbufp[1].a_perm = (S_IRGRP | S_IWGRP) >> 3;
|
|
aclbufp[2].a_type = OTHER_OBJ;
|
|
aclbufp[2].a_id = ILLEGAL_GID;
|
|
aclbufp[2].a_perm = S_IROTH | S_IWOTH;
|
|
aclbufp[3].a_type = CLASS_OBJ;
|
|
aclbufp[3].a_id = ILLEGAL_GID;
|
|
aclbufp[3].a_perm = S_IRWXU | S_IRWXG | S_IRWXO;
|
|
res = MIN_ACL_ENTRIES;
|
|
}
|
|
break;
|
|
case GETACLCNT:
|
|
res = MIN_ACL_ENTRIES;
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
ssize_t
|
|
fhandler_base::fgetxattr (const char *name, void *value, size_t size)
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fsetxattr (const char *name, const void *value, size_t size,
|
|
int flags)
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fadvise (_off64_t offset, _off64_t length, int advice)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::ftruncate (_off64_t length, bool allow_truncate)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::link (const char *newpath)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::utimes (const struct timeval *tvp)
|
|
{
|
|
if (is_fs_special ())
|
|
return utimes_fs (tvp);
|
|
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fsync ()
|
|
{
|
|
if (!get_handle () || nohandle ())
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
if (pc.isdir ()) /* Just succeed. */
|
|
return 0;
|
|
if (FlushFileBuffers (get_handle ()))
|
|
return 0;
|
|
__seterrno ();
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_base::fpathconf (int v)
|
|
{
|
|
switch (v)
|
|
{
|
|
case _PC_LINK_MAX:
|
|
return pc.fs_is_ntfs () || pc.fs_is_samba () || pc.fs_is_nfs ()
|
|
? LINK_MAX : 1;
|
|
case _PC_MAX_CANON:
|
|
if (is_tty ())
|
|
return MAX_CANON;
|
|
set_errno (EINVAL);
|
|
break;
|
|
case _PC_MAX_INPUT:
|
|
if (is_tty ())
|
|
return MAX_INPUT;
|
|
set_errno (EINVAL);
|
|
break;
|
|
case _PC_NAME_MAX:
|
|
/* NAME_MAX is without trailing \0 */
|
|
return pc.isdir () ? PATH_MAX - strlen (get_name ()) - 2 : NAME_MAX;
|
|
case _PC_PATH_MAX:
|
|
/* PATH_MAX is with trailing \0 */
|
|
return pc.isdir () ? PATH_MAX - strlen (get_name ()) - 1 : PATH_MAX;
|
|
case _PC_PIPE_BUF:
|
|
if (pc.isdir ()
|
|
|| get_device () == FH_FIFO || get_device () == FH_PIPE
|
|
|| get_device () == FH_PIPER || get_device () == FH_PIPEW)
|
|
return PIPE_BUF;
|
|
set_errno (EINVAL);
|
|
break;
|
|
case _PC_CHOWN_RESTRICTED:
|
|
return 1;
|
|
case _PC_NO_TRUNC:
|
|
return 1;
|
|
case _PC_VDISABLE:
|
|
if (is_tty ())
|
|
return _POSIX_VDISABLE;
|
|
set_errno (EINVAL);
|
|
break;
|
|
case _PC_ASYNC_IO:
|
|
case _PC_PRIO_IO:
|
|
break;
|
|
case _PC_SYNC_IO:
|
|
return 1;
|
|
case _PC_FILESIZEBITS:
|
|
return FILESIZEBITS;
|
|
case _PC_2_SYMLINKS:
|
|
return 1;
|
|
case _PC_SYMLINK_MAX:
|
|
return SYMLINK_MAX;
|
|
case _PC_POSIX_PERMISSIONS:
|
|
case _PC_POSIX_SECURITY:
|
|
if (get_device () == FH_FS)
|
|
return pc.has_acls ();
|
|
set_errno (EINVAL);
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* Overlapped I/O */
|
|
|
|
bool
|
|
fhandler_base::setup_overlapped ()
|
|
{
|
|
OVERLAPPED *ov = get_overlapped ();
|
|
memset (ov, 0, sizeof (*ov));
|
|
return ov->hEvent = CreateEvent (&sec_none_nih, true, false, NULL);
|
|
}
|
|
|
|
void
|
|
fhandler_base::destroy_overlapped ()
|
|
{
|
|
OVERLAPPED *ov = get_overlapped ();
|
|
if (ov && ov->hEvent)
|
|
{
|
|
CloseHandle (ov->hEvent);
|
|
ov->hEvent = NULL;
|
|
}
|
|
}
|
|
|
|
int
|
|
fhandler_base::wait_overlapped (bool& res, bool writing, DWORD *bytes)
|
|
{
|
|
if (bytes)
|
|
*bytes = (DWORD) -1;
|
|
DWORD err = GetLastError ();
|
|
if (!res && err != ERROR_IO_PENDING)
|
|
{
|
|
if (err != ERROR_HANDLE_EOF && err != ERROR_BROKEN_PIPE)
|
|
goto err;
|
|
res = 1;
|
|
if (*bytes)
|
|
*bytes = 0;
|
|
}
|
|
else
|
|
{
|
|
#ifdef DEBUGGING
|
|
if (!get_overlapped ())
|
|
system_printf ("get_overlapped is zero?");
|
|
if (!get_overlapped ()->hEvent)
|
|
system_printf ("hEvent is zero?");
|
|
#endif
|
|
DWORD n = 1;
|
|
HANDLE w4[2];
|
|
w4[0] = get_overlapped ()->hEvent;
|
|
if (&_my_tls == _main_tls)
|
|
w4[n++] = signal_arrived;
|
|
HANDLE h = writing ? get_output_handle () : get_handle ();
|
|
switch (WaitForMultipleObjects (n, w4, false, INFINITE))
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
debug_printf ("normal read");
|
|
if (!bytes ||
|
|
GetOverlappedResult (h, get_overlapped (), bytes, false))
|
|
res = 1;
|
|
else
|
|
{
|
|
err = GetLastError ();
|
|
goto err;
|
|
}
|
|
break;
|
|
case WAIT_OBJECT_0 + 1:
|
|
debug_printf ("got a signal");
|
|
CancelIo (h);
|
|
set_errno (EINTR);
|
|
res = 0;
|
|
break;
|
|
default:
|
|
err = GetLastError ();
|
|
debug_printf ("WFMO error, %E");
|
|
goto err;
|
|
break;
|
|
}
|
|
}
|
|
goto out;
|
|
|
|
err:
|
|
__seterrno_from_win_error (err);
|
|
res = -1;
|
|
if (err == ERROR_NO_DATA)
|
|
raise (SIGPIPE);
|
|
out:
|
|
ResetEvent (get_overlapped ()->hEvent);
|
|
return res;
|
|
}
|
|
|
|
void
|
|
fhandler_base::read_overlapped (void *ptr, size_t& len)
|
|
{
|
|
#ifdef DEBUGGING
|
|
assert (get_overlapped ());
|
|
assert (get_overlapped ()->hEvent);
|
|
#endif
|
|
while (1)
|
|
{
|
|
bool res = ReadFile (get_handle (), ptr, len, (DWORD *) &len,
|
|
get_overlapped ());
|
|
int wres = wait_overlapped (res, false, (DWORD *) &len);
|
|
if (wres || !_my_tls.call_signal_handler ())
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
fhandler_base::write_overlapped (const void *ptr, size_t len)
|
|
{
|
|
DWORD bytes_written;
|
|
|
|
while (1)
|
|
{
|
|
bool res = WriteFile (get_output_handle (), ptr, len, &bytes_written,
|
|
get_overlapped ());
|
|
int wres = wait_overlapped (res, true, &bytes_written);
|
|
if (wres < 0)
|
|
return -1;
|
|
if (wres || !_my_tls.call_signal_handler ())
|
|
break;
|
|
}
|
|
return bytes_written;
|
|
}
|