posix/streams-compat.c

   1 /* Compatibility symbols for the unimplemented XSI STREAMS extension.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <shlib-compat.h>
  20
  21 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_30)
  22
  23 # include <errno.h>
  24 # include <fcntl.h>
  25
  26 struct strbuf;
  27
  28 int
  29 attribute_compat_text_section
  30 fattach (int fildes, const char *path)
  31 {
  32   __set_errno (ENOSYS);
  33   return -1;
  34 }
  35 compat_symbol (libc, fattach, fattach, GLIBC_2_1);
  36
  37 int
  38 attribute_compat_text_section
  39 fdetach (const char *path)
  40 {
  41   __set_errno (ENOSYS);
  42   return -1;
  43 }
  44 compat_symbol (libc, fdetach, fdetach, GLIBC_2_1);
  45
  46
  47 int
  48 attribute_compat_text_section
  49 getmsg (int fildes, struct strbuf *ctlptr, struct strbuf *dataptr, int *flagsp)
  50 {
  51   __set_errno (ENOSYS);
  52   return -1;
  53 }
  54 compat_symbol (libc, getmsg, getmsg, GLIBC_2_1);
  55
  56 int
  57 attribute_compat_text_section
  58 getpmsg (int fildes, struct strbuf *ctlptr, struct strbuf *dataptr, int *bandp,
  59          int *flagsp)
  60 {
  61   __set_errno (ENOSYS);
  62   return -1;
  63 }
  64 compat_symbol (libc, getpmsg, getpmsg, GLIBC_2_1);
  65
  66 int
  67 attribute_compat_text_section
  68 isastream (int fildes)
  69 {
  70   /* In general we do not have a STREAMS implementation and therefore
  71      return 0.  But for invalid file descriptors we have to return an
  72      error.  */
  73   if (__fcntl (fildes, F_GETFD) < 0)
  74     return -1;
  75
  76   /* No STREAM.  */
  77   return 0;
  78 }
  79 compat_symbol (libc, isastream, isastream, GLIBC_2_1);
  80
  81 int
  82 attribute_compat_text_section
  83 putmsg (int fildes, const struct strbuf *ctlptr, const struct strbuf *dataptr,
  84         int flags)
  85 {
  86   __set_errno (ENOSYS);
  87   return -1;
  88 }
  89 compat_symbol (libc, putmsg, putmsg, GLIBC_2_1);
  90
  91 int
  92 attribute_compat_text_section
  93 putpmsg (int fildes, const struct strbuf *ctlptr, const struct strbuf *dataptr,
  94          int band, int flags)
  95 {
  96   __set_errno (ENOSYS);
  97   return -1;
  98 }
  99 compat_symbol (libc, putpmsg, putpmsg, GLIBC_2_1);
 100
 101 #endif /* SHLIB_COMPAT */