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/* pipe.cc: pipe for Cygwin.
Copyright 1996, 1998, 1999, 2000 Cygnus Solutions.
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 <unistd.h>
#include <sys/fcntl.h>
#include <errno.h>
#include "winsup.h"
static int
make_pipe (int fildes[2], unsigned int psize, int mode)
{
SetResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," make_pipe");
HANDLE r, w;
int fdr, fdw;
SECURITY_ATTRIBUTES *sa = (mode & O_NOINHERIT) ? &sec_none_nih : &sec_none;
if ((fdr = dtable.find_unused_handle ()) < 0)
set_errno (ENMFILE);
else if ((fdw = dtable.find_unused_handle (fdr + 1)) < 0)
set_errno ( ENMFILE);
else if (!CreatePipe (&r, &w, sa, psize))
__seterrno ();
else
{
fhandler_base *fhr = dtable.build_fhandler (fdr, FH_PIPE, "/dev/piper");
fhandler_base *fhw = dtable.build_fhandler (fdw, FH_PIPE, "/dev/pipew");
int binmode = mode & O_TEXT ? 0 : 1;
fhr->init (r, GENERIC_READ, binmode);
fhw->init (w, GENERIC_WRITE, binmode);
if (mode & O_NOINHERIT)
{
fhr->set_close_on_exec_flag (1);
fhw->set_close_on_exec_flag (1);
}
fildes[0] = fdr;
fildes[1] = fdw;
debug_printf ("0 = pipe (%p) (%d:%p, %d:%p)", fildes,
fdr, fhr->get_handle (), fdw, fhw->get_handle ());
ReleaseResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," make_pipe");
return 0;
}
syscall_printf ("-1 = pipe (%p)", fildes);
ReleaseResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," make_pipe");
return -1;
}
extern "C" int
pipe (int filedes[2])
{
return make_pipe (filedes, 16384, (!__fmode || __fmode == O_BINARY) ? O_BINARY : O_TEXT);
}
extern "C" int
_pipe (int filedes[2], unsigned int psize, int mode)
{
int res = make_pipe (filedes, psize, mode);
/* This type of pipe is not interruptible so set the appropriate flag. */
if (!res)
dtable[filedes[0]]->set_r_no_interrupt (1);
return res;
}
int
dup (int fd)
{
int res;
SetResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," dup");
res = dup2 (fd, dtable.find_unused_handle ());
ReleaseResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," dup");
return res;
}
int
dup2 (int oldfd, int newfd)
{
return dtable.dup2 (oldfd, newfd);
}
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