DAOS-14532 gurt: Replace environment APIs hook

Replace getenv() with d_agetenv_str() and d_freeenv_str().

Features: mpiio dfuse
Required-githooks: true
Signed-off-by: Cedric Koch-Hofer <cedric.koch-hofer@intel.com>

src/tests/suite/dfs_test.c

@@ -168,14 +168,16 @@ main(int argc, char **argv)
  }
 
  /** if writing XML, force all ranks other than rank 0 to use stdout to avoid conflicts */
- cmocka_message_output = getenv("CMOCKA_MESSAGE_OUTPUT");
+ d_agetenv_str(&cmocka_message_output, "CMOCKA_MESSAGE_OUTPUT");
  if (rank != 0 && cmocka_message_output && strcasecmp(cmocka_message_output, "xml") == 0) {
+ d_freeenv_str(&cmocka_message_output);
  rc = d_setenv("CMOCKA_MESSAGE_OUTPUT", "stdout", 1);
  if (rc) {
  print_message("d_setenv() failed with %d\n", rc);
  return -1;
  }
  }
+ d_freeenv_str(&cmocka_message_output);
 
  nr_failed = run_specified_tests(tests, rank, size, NULL, 0);