stdio-common/tst-popen.c

   1 /* Copyright (C) 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <wchar.h>
  23
  24 static int
  25 do_test (void)
  26 {
  27   FILE *f = popen ("echo test", "r");
  28   int result = 0, ret;
  29   char *line = NULL;
  30   size_t len = 0;
  31
  32   if (f == NULL)
  33     {
  34       printf ("popen failed %m");
  35       return 1;
  36     }
  37
  38   /* POSIX says that pipe streams are byte-oriented.  */
  39   if (fwide (f, 0) >= 0)
  40     {
  41       puts ("popen did not return byte-oriented stream");
  42       result = 1;
  43     }
  44
  45   if (getline (&line, &len, f) != 5)
  46     {
  47       puts ("could not read line from popen");
  48       result = 1;
  49     }
  50   else if (strcmp (line, "test\n") != 0)
  51     {
  52       printf ("read \"%s\"\n", line);
  53       result = 1;
  54     }
  55
  56   if (getline (&line, &len, f) != -1)
  57     {
  58       puts ("second getline did not return -1");
  59       result = 1;
  60     }
  61
  62   ret = pclose (f);
  63   if (ret != 0)
  64     {
  65       printf ("pclose returned %d\n", ret);
  66       result = 1;
  67     }
  68
  69   return result;
  70 }
  71
  72 #define TEST_FUNCTION do_test ()
  73 #include "../test-skeleton.c"