support/support_need_proc.c

   1 /* Indicate that a test requires a working /proc.
   2    Copyright (C) 2022 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 <unistd.h>
  20 #include <support/check.h>
  21 #include <support/support.h>
  22
  23 /* We test for /proc/self/maps since that's one of the files that one
  24    of our tests actually uses, but the general idea is if Linux's
  25    /proc/ (procfs) filesystem is mounted.  If not, the process exits
  26    with an UNSUPPORTED result code.  */
  27
  28 void
  29 support_need_proc (const char *why_msg)
  30 {
  31 #ifdef __linux__
  32   if (access ("/proc/self/maps", R_OK))
  33     FAIL_UNSUPPORTED ("/proc is not available, %s", why_msg);
  34 #endif
  35 }