kc3-lang/gnulib/tests/test-getgroups.c

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• Hash : 1e642be9
  Author :
  Date : 2009-11-13T12:53:17
  

  getgroups: work around FreeBSD bug
  
  FreeBSD 7.2 mistakenly succeeds on getgroups(-1,ptr) (POSIX
  requires EINVAL failure since -1 is less than the proper result).
  
  * lib/getgroups.c (rpl_getgroups): Work around the bug.
  * m4/getgroups.m4 (gl_FUNC_GETGROUPS): Detect the bug.
  * doc/posix-functions/getgroups.texi (getgroups): Document it.
  * tests/test-getgroups.c (main): Fix buffer overrun.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• tests/test-getgroups.c

• /* Tests of getgroups.
     Copyright (C) 2009 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
  
  #include <config.h>
  
  #include <unistd.h>
  
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdint.h>
  
  #define ASSERT(expr) \
    do                                                                         \
      {                                                                        \
        if (!(expr))                                                           \
          {                                                                    \
            fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__);  \
            fflush (stderr);                                                   \
            abort ();                                                          \
          }                                                                    \
      }                                                                        \
    while (0)
  
  int
  main (int argc, char **argv _UNUSED_PARAMETER_)
  {
    int result;
    gid_t *groups;
  
    errno = 0;
    result = getgroups (0, NULL);
    if (result == -1 && errno == ENOSYS)
      {
        fputs ("skipping test: no support for groups\n", stderr);
        return 77;
      }
    ASSERT (0 <= result);
    ASSERT (result + 1 < SIZE_MAX / sizeof *groups);
    groups = malloc ((result + 1) * sizeof *groups);
    ASSERT (groups);
    groups[result] = -1;
    /* Check for EINVAL handling.  Not all processes have supplemental
       groups, and getgroups does not have to return the effective gid,
       so a result of 0 is reasonable.  Also, we can't test for EINVAL
       if result is 1, because of how getgroups treats 0.  */
    if (1 < result)
      {
        errno = 0;
        ASSERT (getgroups (result - 1, groups) == -1);
        ASSERT (errno == EINVAL);
      }
    ASSERT (getgroups (result, groups) == result);
    ASSERT (getgroups (result + 1, groups) == result);
    ASSERT (groups[result] == -1);
    errno = 0;
    ASSERT (getgroups (-1, NULL) == -1);
    ASSERT (errno == EINVAL);
  
    /* The automated unit test, with no arguments, ends here.  However,
       for debugging purposes, you can pass a command-line argument to
       list the returned groups.  */
    if (1 < argc)
      {
        int i;
        for (i = 0; i < result; i++)
          printf ("%d\n", (int) groups[i]);
      }
    return 0;
  }
  

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