streams/stropts.h

   1 /* Copyright (C) 1998-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _STROPTS_H
  19 #define _STROPTS_H      1
  20
  21 #include <features.h>
  22 #include <bits/types.h>
  23 #include <bits/xtitypes.h>
  24
  25 #ifndef __gid_t_defined
  26 typedef __gid_t gid_t;
  27 # define __gid_t_defined
  28 #endif
  29
  30 #ifndef __uid_t_defined
  31 typedef __uid_t uid_t;
  32 # define __uid_t_defined
  33 #endif
  34
  35 typedef __t_scalar_t t_scalar_t;
  36 typedef __t_uscalar_t t_uscalar_t;
  37
  38 /* Get system specific constants.  */
  39 #include <bits/stropts.h>
  40
  41
  42 __BEGIN_DECLS
  43
  44 /* Test whether FILDES is associated with a STREAM-based file.  */
  45 extern int isastream (int __fildes) __THROW;
  46
  47 /* Receive next message from a STREAMS file.
  48
  49    This function is a cancellation point and therefore not marked with
  50    __THROW.  */
  51 extern int getmsg (int __fildes, struct strbuf *__restrict __ctlptr,
  52                    struct strbuf *__restrict __dataptr,
  53                    int *__restrict __flagsp);
  54
  55 /* Receive next message from a STREAMS file, with *FLAGSP allowing to
  56    control which message.
  57
  58    This function is a cancellation point and therefore not marked with
  59    __THROW.  */
  60 extern int getpmsg (int __fildes, struct strbuf *__restrict __ctlptr,
  61                     struct strbuf *__restrict __dataptr,
  62                     int *__restrict __bandp, int *__restrict __flagsp);
  63
  64 /* Perform the I/O control operation specified by REQUEST on FD.
  65    One argument may follow; its presence and type depend on REQUEST.
  66    Return value depends on REQUEST.  Usually -1 indicates error.  */
  67 extern int ioctl (int __fd, unsigned long int __request, ...) __THROW;
  68
  69 /* Send a message on a STREAM.
  70
  71    This function is a cancellation point and therefore not marked with
  72    __THROW.  */
  73 extern int putmsg (int __fildes, const struct strbuf *__ctlptr,
  74                    const struct strbuf *__dataptr, int __flags);
  75
  76 /* Send a message on a STREAM to the BAND.
  77
  78    This function is a cancellation point and therefore not marked with
  79    __THROW.  */
  80 extern int putpmsg (int __fildes, const struct strbuf *__ctlptr,
  81                     const struct strbuf *__dataptr, int __band, int __flags);
  82
  83 /* Attach a STREAMS-based file descriptor FILDES to a file PATH in the
  84    file system name space.  */
  85 extern int fattach (int __fildes, const char *__path) __THROW;
  86
  87 /* Detach a name PATH from a STREAMS-based file descriptor.  */
  88 extern int fdetach (const char *__path) __THROW;
  89
  90 __END_DECLS
  91
  92 #endif /* stropts.h */