1/* Tests of setenv. 2 Copyright (C) 2009, 2010 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program 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 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17/* Written by Eric Blake <ebb9@byu.net>, 2009. */ 18 19#include <config.h> 20 21#include <stdlib.h> 22 23#include "signature.h" 24SIGNATURE_CHECK (setenv, int, (char const *, char const *, int)); 25 26#include <errno.h> 27#include <string.h> 28#include <unistd.h> 29 30#include "macros.h" 31 32int 33main (void) 34{ 35 /* Test overwriting. */ 36 ASSERT (setenv ("a", "==", -1) == 0); 37 ASSERT (setenv ("a", "2", 0) == 0); 38 ASSERT (strcmp (getenv ("a"), "==") == 0); 39 40 /* Required to fail with EINVAL. */ 41 errno = 0; 42 ASSERT (setenv ("", "", 1) == -1); 43 ASSERT (errno == EINVAL); 44 errno = 0; 45 ASSERT (setenv ("a=b", "", 0) == -1); 46 ASSERT (errno == EINVAL); 47#if 0 48 /* glibc and gnulib's implementation guarantee this, but POSIX no 49 longer requires it: http://austingroupbugs.net/view.php?id=185 */ 50 errno = 0; 51 ASSERT (setenv (NULL, "", 0) == -1); 52 ASSERT (errno == EINVAL); 53#endif 54 55 return 0; 56} 57