1  /* Copyright (C) 2004-2023 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     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdio.h>
      19  #include <string.h>
      20  #include <wchar.h>
      21  
      22  static int
      23  do_test (void)
      24  {
      25    FILE *f = popen ("echo test", "r");
      26    int result = 0, ret;
      27    char *line = NULL;
      28    size_t len = 0;
      29  
      30    if (f == NULL)
      31      {
      32        printf ("popen failed %m");
      33        return 1;
      34      }
      35  
      36    /* POSIX says that pipe streams are byte-oriented.  */
      37    if (fwide (f, 0) >= 0)
      38      {
      39        puts ("popen did not return byte-oriented stream");
      40        result = 1;
      41      }
      42  
      43    if (getline (&line, &len, f) != 5)
      44      {
      45        puts ("could not read line from popen");
      46        result = 1;
      47      }
      48    else if (strcmp (line, "test\n") != 0)
      49      {
      50        printf ("read \"%s\"\n", line);
      51        result = 1;
      52      }
      53  
      54    if (getline (&line, &len, f) != -1)
      55      {
      56        puts ("second getline did not return -1");
      57        result = 1;
      58      }
      59  
      60    ret = pclose (f);
      61    if (ret != 0)
      62      {
      63        printf ("pclose returned %d\n", ret);
      64        result = 1;
      65      }
      66  
      67    return result;
      68  }
      69  
      70  #define TEST_FUNCTION do_test ()
      71  #include "../test-skeleton.c"