newlib/winsup/cygwin/fhandler_zero.cc

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/* fhandler_dev_zero.cc: code to access /dev/zero
Copyright 2000, 2001, 2002 Red Hat, Inc.
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Written by DJ Delorie (dj@cygnus.com)
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 "winsup.h"
#include <errno.h>
#include "security.h"
#include "fhandler.h"
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fhandler_dev_zero::fhandler_dev_zero ()
: fhandler_base (FH_ZERO)
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{
}
int
* dcrt0.cc (dll_crt0_1): Don't close hexec_proc if it is NULL. * fork.cc (vfork): Add debugging statements. * path.cc (get_device_number): Make static. Rewrite to inspect both unix and windows paths. (get_raw_device_number): Just check for parts of raw device that we care about. (get_devn): New function, pulled from get_device_number. (win32_device_name): Accomodate arg changes to get_device_number. (mount_info::get_device_number): Call get_device_number on translated Windows path. * spawn.cc (spawn_guts): Don't treat P_VFORK differently from P_NOWAIT. Add handle to child's shared region to child so that it will be preserved if the parent goes away. * fhandler.h: Throughout, simplify to one open method for all fhandler classes, requiring a path_conv first element. * fhandler.cc (fhandler_base::open): Remove obsolete method. Generalize to require path_conv * as first argument. (fhandler_disk_file::open): Remove obsolete method. (fhandler_disk_file::open): Use path_conv pointer rather than reference. * fhandler_clipboard.cc (fhandler_dev_clipboard::dup): Use new open method. (fhandler_dev_clipboard::open): Accomodate new argument for open methods. * fhandler_console.cc (fhandler_console::open): Ditto. (fhandler_console::dup): Use new open method. (fhandler_console::fixup_after_fork): Ditto. (fhandler_console::fixup_after_exec): Ditto. * fhandler_dsp.cc (fhandler_dev_dsp::open): Accomodate new argument for open methods. * fhandler_floppy.cc (fhandler_dev_floppy::open): Ditto. * fhandler_mem.cc (fhandler_dev_mem::open): Ditto. * fhandler_random (fhandler_dev_random::open): Ditto. * fhandler_raw.cc (fhandler_dev_raw::open): Ditto. * fhandler_serial.cc (fhandler_serial::open): Ditto. * fhandler_tape.cc (fhandler_dev_tape::open): Ditto. * fhandler_tty.cc (fhandler_tty_slave::open): Ditto. (fhandler_pty_master::open): Ditto. * fhandler_windows.cc (fhandler_windows::open): Ditto. * fhandler_zero.cc (fhandler_dev_zero::open): Ditto. * fhandler_socket.cc (fhandler_socket::set_connect_secret): Accomodate new argument for open methods. * syscalls.cc (_open): Ditto. (stat_worker): Ditto.
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fhandler_dev_zero::open (path_conv *, int flags, mode_t)
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{
set_flags (flags);
set_open_status ();
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return 1;
}
int
fhandler_dev_zero::write (const void *, size_t len)
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{
return len;
}
int __stdcall
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fhandler_dev_zero::read (void *ptr, size_t len)
{
memset(ptr, 0, len);
return len;
}
* cygwin.din (fstat64): New symbol. (ftruncate64): Ditto. (lseek64): Ditto. (lstat64): Ditto. (mmap64): Ditto. (seekdir64): Ditto. (stat64): Ditto. (telldir64): Ditto. (truncate64): Ditto. * dir.cc (telldir64): New function. (telldir): Call telldir64(). (seekdir64): New function. (seekdir): Call seekdir64(). * fhandler.h: Redefine all methods using __off32_t to use __off64_t. * fhandler.cc: Use __off64_t and struct __stat64 throughout. * fhandler_clipboard.cc: Ditto. * fhandler_disk_file.cc: Ditto. * fhandler_dsp.cc: Ditto. * fhandler_floppy.cc: Ditto. * fhandler_mem.cc: Ditto. * fhandler_random.cc: Ditto. * fhandler_socket.cc: Ditto. * fhandler_tape.cc: Ditto. * fhandler_zero.cc: Ditto. * pipe.cc: Ditto. * glob.c: Ditto, call lstat64 and stat64 in Cygwin. * mmap.cc: Use __off64_t throughout. (mmap64): New function. * sec_acl.cc (acl_worker): Use struct __stat64, call stat64 and lstat64. * syscalls.cc (lseek64): New function. (stat64_to_stat32): Ditto. (fstat64): Ditto. (stat64): Ditto. (lstat64): Ditto. (ftruncate64): Ditto. (truncate64): Ditto. (_fstat): Call fstat64. (_stat): Call stat64. (cygwin_lstat): Rename to avoid declaration problem. Call lstat64. (stat_worker): Use struct __stat64. (access): Ditto. (ftruncate): Call ftruncate64. (truncate): Call truncate64. * wincap.cc: Set flag has_64bit_file_access appropriately. * wincap.h: Add flag has_64bit_file_access. * winsup.h (ILLEGAL_SEEK): Define as __off64_t. (stat_dev): Declare using struct __stat64. (stat_worker): Ditto. * include/cygwin/stat.h (struct __stat32): Define if compiling Cygwin. (struct __stat64): Ditto. (struct stat): Revert definition with explicitly sized datatypes. Eliminate sized field names. * include/cygwin/types.h (blksize_t): New type. (__blkcnt32_t): Ditto. (__blkcnt64_t): Ditto. (blkcnt_t): Ditto.
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__off64_t
fhandler_dev_zero::lseek (__off64_t, int)
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{
return 0;
}
int
fhandler_dev_zero::close (void)
{
return 0;
}
void
fhandler_dev_zero::dump ()
{
paranoid_printf("here, fhandler_dev_zero");
}