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authorUlrich Drepper <drepper@redhat.com>1999-07-29 20:36:56 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-29 20:36:56 +0000
commita827898574892dce3e83ed4b08a51927c16445a5 (patch)
tree46e90aaeb1303d5afd93fc772c3f3bd65a9a4fa2 /stdlib
parent50d3390d3b54d384be11ece9e34f17e30cfd742c (diff)
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Tests for setenv, unsetenv, putenv, etc.
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/tst-environ.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/stdlib/tst-environ.c b/stdlib/tst-environ.c
new file mode 100644
index 0000000..01083f5
--- /dev/null
+++ b/stdlib/tst-environ.c
@@ -0,0 +1,141 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+
+#define VAR "FOOBAR"
+
+char putenv_val[100] = VAR "=some longer value";
+
+int
+main (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. */
+ putenv (VAR);
+
+ /* Getting the value should now fail. */
+ if (getenv (VAR) != NULL)
+ {
+ printf ("getenv #10 failed (\"%s\" found)\n", getenv (VAR));
+ result = 1;
+ }
+
+ return result;
+}