support/support_capture_subprocess_check.c

   1 /* Verify capture output from a subprocess.
   2    Copyright (C) 2017-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdbool.h>
  20 #include <stdio.h>
  21 #include <support/capture_subprocess.h>
  22 #include <support/check.h>
  23
  24 static void
  25 print_context (const char *context, bool *failed)
  26 {
  27   if (*failed)
  28     /* Do not duplicate message.  */
  29     return;
  30   support_record_failure ();
  31   printf ("error: subprocess failed: %s\n", context);
  32 }
  33
  34 void
  35 support_capture_subprocess_check (struct support_capture_subprocess *proc,
  36                                   const char *context, int status,
  37                                   int allowed)
  38 {
  39   TEST_VERIFY ((allowed & sc_allow_none)
  40                || (allowed & sc_allow_stdout)
  41                || (allowed & sc_allow_stderr));
  42   TEST_VERIFY (!((allowed & sc_allow_none)
  43                  && ((allowed & sc_allow_stdout)
  44                      || (allowed & sc_allow_stderr))));
  45
  46   bool failed = false;
  47   if (proc->status != status)
  48     {
  49       print_context (context, &failed);
  50       printf ("error:   expected exit status: %d\n", status);
  51       printf ("error:   actual exit status:   %d\n", proc->status);
  52     }
  53   if (!(allowed & sc_allow_stdout) && proc->out.length != 0)
  54     {
  55       print_context (context, &failed);
  56       printf ("error:   unexpected output from subprocess\n");
  57       fwrite (proc->out.buffer, proc->out.length, 1, stdout);
  58       puts ("\n");
  59     }
  60   if (!(allowed & sc_allow_stderr) && proc->err.length != 0)
  61     {
  62       print_context (context, &failed);
  63       printf ("error:   unexpected error output from subprocess\n");
  64       fwrite (proc->err.buffer, proc->err.length, 1, stdout);
  65       puts ("\n");
  66     }
  67 }