43c23d4b82
* sigproc.cc (wait_for_sigthread): Ditto. Don't synchronize with wait_sig after receiving an event that it is ready to go. (init_sig_pipe): New function. (wait_sig): Call init_sig_pipe to create pipes for communicating signals to this process. Don't send sigCONT signal when initializing. * fork.cc (frok::child): Accommodate wait_for_sigpipe parameter change. * fhandler.h (fhandler_*::write): Make ssize_t/__stdcall. (fhandler_*::write_overlapped): Ditto. (fhandler_*::raw_write): Ditto. (fhandler_*::readv): Ditto. (fhandler_*::writev): Ditto. (fhandler_*::raw_read): Make __stdcall. * fhandler: Accommodate changes to read/write functions throughout. * fhandler_clipboard.cc: Ditto. * fhandler_console.cc: Ditto. * fhandler_dsp.cc: Ditto. * fhandler_fifo.cc: Ditto. * fhandler_mailslot.cc: Ditto. * fhandler_mem.cc: Ditto. * fhandler_mem.cc: Ditto. * fhandler_random.cc: Ditto. * fhandler_tape.cc: Ditto. * fhandler_tty.cc: Ditto. * fhandler_virtual.cc: Ditto. * fhandler_windows.cc: Ditto. * fhandler_zero.cc: Ditto. * syscalls.cc (readv): Use ssize_t as temp variable. * fhandler.cc (fhandler_base::read): Coerce returned len to signed or it will never be treated as < 0. (fhandler_base::wait_overlapped): Minimize calls to GetLastError. Remove duplicate debugging test. Fix error return. * fhandler.h (fhandler_fifo::fifo_name): Declare new function. (fhandler_fifo::close): Ditto. (fhandler_fifo::dup): Ditto. (fhandler_fifo::close_on_exec): Ditto. * fhandler.cc (fhandler_fifo::fifo_name): Define new function. (FIFO_BUF_SIZE): New define. (cnp): Ditto. (fhandler_fifo::open): Rework. Use cnp to open named pipe. Always open write side as a client. Open dummy client when writing and can't connect. (wait): Rework. Implement fifo_wait_for_next_client. Handle signals during connect better. Add new fifo_wait_for_server code which polls (sigh) waiting for server. (fhandler_fifo::raw_read): Handle transition states when one client closes and another is available. (fhandler_fifo::close): Define. (fhandler_fifo::dup): Ditto. (fhandler_fifo::close_on_exec): Ditto.
55 lines
985 B
C++
55 lines
985 B
C++
/* fhandler_dev_zero.cc: code to access /dev/zero
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Copyright 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.
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Written by DJ Delorie (dj@cygnus.com)
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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 "security.h"
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#include "cygerrno.h"
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#include "path.h"
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#include "fhandler.h"
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fhandler_dev_zero::fhandler_dev_zero ()
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: fhandler_base ()
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{
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}
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int
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fhandler_dev_zero::open (int flags, mode_t)
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{
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set_flags ((flags & ~O_TEXT) | O_BINARY);
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nohandle (true);
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set_open_status ();
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return 1;
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}
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ssize_t __stdcall
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fhandler_dev_zero::write (const void *, size_t len)
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{
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if (get_device () == FH_FULL)
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{
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set_errno (ENOSPC);
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return -1;
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}
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return len;
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}
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void __stdcall
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fhandler_dev_zero::read (void *ptr, size_t& len)
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{
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memset (ptr, 0, len);
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}
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_off64_t
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fhandler_dev_zero::lseek (_off64_t, int)
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{
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return 0;
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}
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