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Diffstat (limited to 'REORG.TODO/stdlib/tst-environ.c')
| -rw-r--r-- | REORG.TODO/stdlib/tst-environ.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/REORG.TODO/stdlib/tst-environ.c b/REORG.TODO/stdlib/tst-environ.c new file mode 100644 index 0000000000..b2301641f5 --- /dev/null +++ b/REORG.TODO/stdlib/tst-environ.c @@ -0,0 +1,229 @@ +/* Copyright (C) 1999-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <libc-diag.h> + +#define VAR "FOOBAR" + +char putenv_val[100] = VAR "=some longer value"; + +static int +do_test (void) +{ + int result = 0; + const char *valp; + + /* First test: remove entry FOOBAR, whether it exists or not. */ + unsetenv (VAR); + + /* Now getting the value should fail. */ + if (getenv (VAR) != NULL) + { + printf ("There should be no `%s' value\n", VAR); + result = 1; + } + + /* Now add a value, with the replace flag cleared. */ + if (setenv (VAR, "one", 0) != 0) + { + printf ("setenv #1 failed: %m\n"); + result = 1; + } + + /* Getting this value should now be possible. */ + valp = getenv (VAR); + if (valp == NULL || strcmp (valp, "one") != 0) + { + puts ("getenv #2 failed"); + result = 1; + } + + /* Try to replace without the replace flag set. This should fail. */ + if (setenv (VAR, "two", 0) != 0) + { + printf ("setenv #2 failed: %m\n"); + result = 1; + } + + /* The value shouldn't have changed. */ + valp = getenv (VAR); + if (valp == NULL || strcmp (valp, "one") != 0) + { + puts ("getenv #3 failed"); + result = 1; + } + + /* Now replace the value using putenv. */ + if (putenv (putenv_val) != 0) + { + printf ("putenv #1 failed: %m\n"); + result = 1; + } + + /* The value should have changed now. */ + valp = getenv (VAR); + if (valp == NULL || strcmp (valp, "some longer value") != 0) + { + printf ("getenv #4 failed (is \"%s\")\n", valp); + result = 1; + } + + /* Now one tricky check: changing the variable passed in putenv should + change the environment. */ + strcpy (&putenv_val[sizeof VAR], "a short one"); + + /* The value should have changed again. */ + valp = getenv (VAR); + if (valp == NULL || strcmp (valp, "a short one") != 0) + { + puts ("getenv #5 failed"); + result = 1; + } + + /* It should even be possible to rename the variable. */ + strcpy (putenv_val, "XYZZY=some other value"); + + /* Now a lookup using the old name should fail. */ + if (getenv (VAR) != NULL) + { + puts ("getenv #6 failed"); + result = 1; + } + + /* But using the new name it should work. */ + valp = getenv ("XYZZY"); + if (valp == NULL || strcmp (valp, "some other value") != 0) + { + puts ("getenv #7 failed"); + result = 1; + } + + /* Create a new variable with the old name. */ + if (setenv (VAR, "a new value", 0) != 0) + { + printf ("setenv #3 failed: %m\n"); + result = 1; + } + + /* At this point a getenv call must return the new value. */ + valp = getenv (VAR); + if (valp == NULL || strcmp (valp, "a new value") != 0) + { + puts ("getenv #8 failed"); + result = 1; + } + + /* Black magic: rename the variable we added using putenv back. */ + strcpy (putenv_val, VAR "=old name new value"); + + /* This is interesting. We have two variables with the same name. + Getting a value should return one of them. */ + valp = getenv (VAR); + if (valp == NULL + || (strcmp (valp, "a new value") != 0 + && strcmp (valp, "old name new value") != 0)) + { + puts ("getenv #9 failed"); + result = 1; + } + + /* More fun ahead: we are now removing the variable. This should remove + both values. The cast is ok: this call should never put the string + in the environment and it should never modify it. */ + putenv ((char *) VAR); + + /* Getting the value should now fail. */ + if (getenv (VAR) != NULL) + { + printf ("getenv #10 failed (\"%s\" found)\n", getenv (VAR)); + result = 1; + } + + /* Now a test with an environment variable that's one character long. + This is to test a special case in the getenv implementation. */ + strcpy (putenv_val, "X=one character test"); + if (putenv (putenv_val) != 0) + { + printf ("putenv #2 failed: %m\n"); + result = 1; + } + + valp = getenv ("X"); + if (valp == NULL || strcmp (valp, "one character test") != 0) + { + puts ("getenv #11 failed"); + result = 1; + } + + /* Both setenv and unsetenv should return -1/EINVAL for NULL or "" name + or if name contains '=' character. */ + errno = 0; + if (setenv (NULL, "val", 1) >= 0 || errno != EINVAL) + { + puts ("setenv #4 failed"); + result = 1; + } + + errno = 0; + if (setenv ("", "val", 0) >= 0 || errno != EINVAL) + { + puts ("setenv #5 failed"); + result = 1; + } + + errno = 0; + if (setenv ("var=val", "val", 1) >= 0 || errno != EINVAL) + { + puts ("setenv #6 failed"); + result = 1; + } + + /* This deliberately tests supplying a null pointer to a function whose + argument is marked __attribute__ ((nonnull)). */ + DIAG_PUSH_NEEDS_COMMENT; + DIAG_IGNORE_NEEDS_COMMENT(5, "-Wnonnull"); + errno = 0; + if (unsetenv (NULL) >= 0 || errno != EINVAL) + { + puts ("unsetenv #1 failed"); + result = 1; + } + DIAG_POP_NEEDS_COMMENT; + + errno = 0; + if (unsetenv ("") >= 0 || errno != EINVAL) + { + puts ("unsetenv #2 failed"); + result = 1; + } + + errno = 0; + if (unsetenv ("x=y") >= 0 || errno != EINVAL) + { + puts ("unsetenv #3 failed"); + result = 1; + } + + return result; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |