import winsup-2000-02-17 snapshot

2000-02-17 19:38:33 +00:00
parent 369d8a8fd5
commit 1fd5e000ac
582 changed files with 146593 additions and 0 deletions
--- a/winsup/cygwin/pipe.cc
+++ b/winsup/cygwin/pipe.cc
@@ -0,0 +1,93 @@
+/* pipe.cc: pipe for WIN32.
+
+   Copyright 1996, 1998, 1999 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);
+}