diff options
Diffstat (limited to 'winsup/cygwin/pipe.cc')
-rw-r--r-- | winsup/cygwin/pipe.cc | 291 |
1 files changed, 0 insertions, 291 deletions
diff --git a/winsup/cygwin/pipe.cc b/winsup/cygwin/pipe.cc deleted file mode 100644 index 242556a..0000000 --- a/winsup/cygwin/pipe.cc +++ /dev/null @@ -1,291 +0,0 @@ -/* pipe.cc: pipe for Cygwin. - - Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc. - -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. */ - -/* FIXME: Should this really be fhandler_pipe.cc? */ - -#include "winsup.h" -#include <unistd.h> -#include <sys/socket.h> -#include "cygerrno.h" -#include "security.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "thread.h" -#include "pinfo.h" -#include "cygthread.h" - -static unsigned pipecount; -static const NO_COPY char pipeid_fmt[] = "stupid_pipe.%u.%u"; - -fhandler_pipe::fhandler_pipe () - : fhandler_base (), guard (NULL), broken_pipe (false), writepipe_exists(0), - orig_pid (0), id (0) -{ -} - -_off64_t -fhandler_pipe::lseek (_off64_t offset, int whence) -{ - debug_printf ("(%d, %d)", offset, whence); - set_errno (ESPIPE); - return -1; -} - -void -fhandler_pipe::set_close_on_exec (int val) -{ - fhandler_base::set_close_on_exec (val); - if (guard) - set_inheritance (guard, val); - if (writepipe_exists) - set_inheritance (writepipe_exists, val); -} - -struct pipeargs -{ - fhandler_base *fh; - void *ptr; - size_t *len; -}; - -static DWORD WINAPI -read_pipe (void *arg) -{ - pipeargs *pi = (pipeargs *) arg; - pi->fh->fhandler_base::read (pi->ptr, *pi->len); - return 0; -} - -void __stdcall -fhandler_pipe::read (void *in_ptr, size_t& in_len) -{ - if (broken_pipe) - in_len = 0; - else - { - pipeargs pi = {dynamic_cast<fhandler_base *>(this), in_ptr, &in_len}; - ResetEvent (read_state); - cygthread *th = new cygthread (read_pipe, &pi, "read_pipe"); - if (th->detach (read_state) && !in_len) - in_len = (size_t) -1; /* received a signal */ - } - (void) ReleaseMutex (guard); - return; -} - -int -fhandler_pipe::close () -{ - if (guard) - CloseHandle (guard); - if (writepipe_exists) - CloseHandle (writepipe_exists); - if (read_state && !cygheap->fdtab.in_vfork_cleanup ()) - CloseHandle (read_state); - if (get_handle ()) - { - CloseHandle (get_handle ()); - set_io_handle (NULL); - } - return 0; -} - -bool -fhandler_pipe::hit_eof () -{ - char buf[80]; - HANDLE ev; - if (broken_pipe) - return 1; - if (!orig_pid) - return false; - __small_sprintf (buf, pipeid_fmt, orig_pid, id); - if ((ev = OpenEvent (EVENT_ALL_ACCESS, FALSE, buf))) - CloseHandle (ev); - debug_printf ("%s %p", buf, ev); - return ev == NULL; -} - -void -fhandler_pipe::fixup_after_exec (HANDLE parent) -{ - if (read_state) - read_state = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL); -} - -void -fhandler_pipe::fixup_after_fork (HANDLE parent) -{ - fhandler_base::fixup_after_fork (parent); - if (guard) - fork_fixup (parent, guard, "guard"); - if (writepipe_exists) - fork_fixup (parent, writepipe_exists, "guard"); - fixup_after_exec (parent); -} - -int -fhandler_pipe::dup (fhandler_base *child) -{ - if (get_handle ()) - { - int res = fhandler_base::dup (child); - if (res) - return res; - } - - fhandler_pipe *ftp = (fhandler_pipe *) child; - - /* FIXME: This leaks handles in the failing condition */ - if (guard == NULL) - ftp->guard = NULL; - else if (!DuplicateHandle (hMainProc, guard, hMainProc, &ftp->guard, 0, 1, - DUPLICATE_SAME_ACCESS)) - { - debug_printf ("couldn't duplicate guard %p, %E", guard); - return -1; - } - - if (writepipe_exists == NULL) - ftp->writepipe_exists = NULL; - else if (!DuplicateHandle (hMainProc, writepipe_exists, hMainProc, - &ftp->writepipe_exists, 0, 1, - DUPLICATE_SAME_ACCESS)) - { - debug_printf ("couldn't duplicate writepipe_exists %p, %E", writepipe_exists); - return -1; - } - - if (read_state == NULL) - ftp->read_state = NULL; - else if (!DuplicateHandle (hMainProc, read_state, hMainProc, - &ftp->read_state, 0, 1, - DUPLICATE_SAME_ACCESS)) - { - debug_printf ("couldn't duplicate read_state %p, %E", writepipe_exists); - return -1; - } - - ftp->id = id; - ftp->orig_pid = orig_pid; - return 0; -} - -int -fhandler_pipe::create (fhandler_pipe *fhs[2], unsigned psize, int mode, bool fifo) -{ - HANDLE r, w; - SECURITY_ATTRIBUTES *sa = (mode & O_NOINHERIT) ? &sec_none_nih : &sec_none; - int res = -1; - - if (!CreatePipe (&r, &w, sa, psize)) - __seterrno (); - else - { - fhs[0] = (fhandler_pipe *) build_fh_dev (*piper_dev); - fhs[1] = (fhandler_pipe *) build_fh_dev (*pipew_dev); - - int binmode = mode & O_TEXT ?: O_BINARY; - fhs[0]->init (r, GENERIC_READ, binmode); - fhs[1]->init (w, GENERIC_WRITE, binmode); - if (mode & O_NOINHERIT) - { - fhs[0]->set_close_on_exec_flag (1); - fhs[1]->set_close_on_exec_flag (1); - } - - fhs[0]->read_state = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL); - fhs[0]->set_need_fork_fixup (); - - res = 0; - fhs[0]->create_guard (sa); - if (wincap.has_unreliable_pipes ()) - { - char buf[80]; - int count = pipecount++; /* FIXME: Should this be InterlockedIncrement? */ - __small_sprintf (buf, pipeid_fmt, myself->pid, count); - fhs[1]->writepipe_exists = CreateEvent (sa, TRUE, FALSE, buf); - fhs[0]->orig_pid = myself->pid; - fhs[0]->id = count; - } - } - - syscall_printf ("%d = ([%p, %p], %d, %p)", res, fhs[0], fhs[1], psize, mode); - return res; -} - -int -fhandler_pipe::ioctl (unsigned int cmd, void *p) -{ - int n; - - switch (cmd) - { - case FIONREAD: - if (get_device () == FH_PIPEW) - { - set_errno (EINVAL); - return -1; - } - if (!PeekNamedPipe (get_handle (), NULL, 0, NULL, (DWORD *) &n, NULL)) - { - __seterrno (); - return -1; - } - break; - default: - return fhandler_base::ioctl (cmd, p); - break; - } - *(int *) p = n; - return 0; -} - -extern "C" int -pipe (int filedes[2]) -{ - extern DWORD binmode; - fhandler_pipe *fhs[2]; - int res = fhandler_pipe::create (fhs, 16384, (!binmode || binmode == O_BINARY) - ? O_BINARY : O_TEXT); - if (res == 0) - { - cygheap_fdnew fdin; - cygheap_fdnew fdout (fdin, false); - fdin = fhs[0]; - fdout = fhs[1]; - filedes[0] = fdin; - filedes[1] = fdout; - } - - return res; -} - -extern "C" int -_pipe (int filedes[2], unsigned int psize, int mode) -{ - fhandler_pipe *fhs[2]; - int res = fhandler_pipe::create (fhs, psize, mode); - /* This type of pipe is not interruptible so set the appropriate flag. */ - if (!res) - { - cygheap_fdnew fdin; - cygheap_fdnew fdout (fdin, false); - fhs[0]->set_r_no_interrupt (1); - fdin = fhs[0]; - fdout = fhs[1]; - filedes[0] = fdin; - filedes[1] = fdout; - } - - return res; -} |