tools: Use $TMPDIR instead of $TEMP

TMPDIR is a more standard environment variable for locating the
temp directory on Unix. In addition since this is only used in
tests, remove the code from the generic p11_path_expand() func.

In general remove the possibility for forks to put $HOME or $TEMP
environment variables in configured paths. This was possible
due to code in p11_path_expand() but not something we supported.

https://bugzilla.redhat.com/show_bug.cgi?id=985017

4 files changed, 60 insertions, 74 deletions

diff --git a/common/path.c b/common/path.c
index 818befc..0ff1431 100644
--- a/common/path.c
+++ b/common/path.c
@@ -49,7 +49,6 @@
 #include <string.h>
 
 #ifdef OS_UNIX
-#include <paths.h>
 #include <pwd.h>
 #include <unistd.h>
 #endif
@@ -135,41 +134,6 @@ expand_homedir (const char *remainder)
 	}
 }
 
-static char *
-expand_tempdir (const char *remainder)
-{
-	const char *env;
-
-	if (remainder[0] == '\0')
-		remainder = NULL;
-
-	env = getenv ("TEMP");
-	if (env && env[0]) {
-		return p11_path_build (env, remainder, NULL);
-
-	} else {
-#ifdef OS_UNIX
-#ifdef _PATH_TMP
-		return p11_path_build (_PATH_TMP, remainder, NULL);
-#else
-		return p11_path_build ("/tmp", remainder, NULL);
-#endif
-
-#else /* OS_WIN32 */
-		char directory[MAX_PATH + 1];
-
-		if (!GetTempPathA (MAX_PATH + 1, directory)) {
-			p11_message ("couldn't lookup temp directory");
-			errno = ENOTDIR;
-			return NULL;
-		}
-
-		return p11_path_build (directory, remainder, NULL);
-
-#endif /* OS_WIN32 */
-	}
-}
-
 static inline bool
 is_path_component_or_null (char ch)
 {
@@ -189,14 +153,6 @@ p11_path_expand (const char *path)
 	    is_path_component_or_null (path[1])) {
 		return expand_homedir (path + 1);
 
-	} else if (strncmp (path, "$HOME", 5) == 0 &&
-	    is_path_component_or_null (path[5])) {
-		return expand_homedir (path + 5);
-
-	} else if (strncmp (path, "$TEMP", 5) == 0 &&
-	    is_path_component_or_null (path[5])) {
-		return expand_tempdir (path + 5);
-
 	} else {
 		return strdup (path);
 	}
diff --git a/common/test.c b/common/test.c
index c72cb7d..0f5c451 100644
--- a/common/test.c
+++ b/common/test.c
@@ -38,8 +38,10 @@
 
 #include "test.h"
 #include "debug.h"
+#include "path.h"
 
 #include <assert.h>
+#include <errno.h>
 #include <setjmp.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -274,3 +276,58 @@ p11_test_run (int argc,
 	gl.number = 0;
 	return ret;
 }
+
+static char *
+expand_tempdir (const char *name)
+{
+	const char *env;
+
+	env = getenv ("TMPDIR");
+	if (env && env[0]) {
+		return p11_path_build (env, name, NULL);
+
+	} else {
+#ifdef OS_UNIX
+#ifdef _PATH_TMP
+		return p11_path_build (_PATH_TMP, name, NULL);
+#else
+		return p11_path_build ("/tmp", name, NULL);
+#endif
+
+#else /* OS_WIN32 */
+		char directory[MAX_PATH + 1];
+
+		if (!GetTempPathA (MAX_PATH + 1, directory)) {
+			printf ("# couldn't lookup temp directory\n");
+			errno = ENOTDIR;
+			return NULL;
+		}
+
+		return p11_path_build (directory, name, NULL);
+
+#endif /* OS_WIN32 */
+	}
+}
+
+char *
+p11_test_directory (const char *prefix)
+{
+	char *templ;
+	char *directory;
+
+	if (asprintf (&templ, "%s.XXXXXX", prefix) < 0)
+		assert_not_reached ();
+
+	directory = expand_tempdir (templ);
+	assert (directory != NULL);
+
+	if (!mkdtemp (directory)) {
+		printf ("# couldn't create temp directory: %s: %s\n",
+		        directory, strerror (errno));
+		free (directory);
+		assert_not_reached ();
+	}
+
+	free (templ);
+	return directory;
+}
diff --git a/common/test.h b/common/test.h
index 1da3608..7354595 100644
--- a/common/test.h
+++ b/common/test.h
@@ -128,4 +128,6 @@ void        p11_fixture             (void (* setup) (void *),
 int         p11_test_run            (int argc,
                                      char **argv);
 
+char *      p11_test_directory      (const char *prefix);
+
 #endif /* P11_TEST_H_ */
diff --git a/common/tests/test-path.c b/common/tests/test-path.c
index 1f85dbb..0077cd0 100644
--- a/common/tests/test-path.c
+++ b/common/tests/test-path.c
@@ -114,50 +114,21 @@ test_expand (void)
 #ifdef OS_UNIX
 	putenv ("HOME=/home/blah");
 	check_equals_and_free ("/home/blah/my/path",
-	                       p11_path_expand ("$HOME/my/path"));
-	check_equals_and_free ("/home/blah/my/path",
 	                       p11_path_expand ("~/my/path"));
 	check_equals_and_free ("/home/blah",
-	                       p11_path_expand ("$HOME"));
-	check_equals_and_free ("/home/blah",
 	                       p11_path_expand ("~"));
-	putenv ("TEMP=/tmpdir");
-	check_equals_and_free ("/tmpdir/my/path",
-	                       p11_path_expand ("$TEMP/my/path"));
-	check_equals_and_free ("/tmpdir",
-	                       p11_path_expand ("$TEMP"));
 #else /* OS_WIN32 */
 	putenv ("HOME=C:\\Users\\blah");
 	check_equals_and_free ("C:\\Users\\blah\\path",
-	                       p11_path_expand ("$HOME/path"));
-	check_equals_and_free ("C:\\Users\\blah\\path",
-	                       p11_path_expand ("$HOME\\path"));
-	check_equals_and_free ("C:\\Users\\blah\\path",
-	                       p11_path_expand ("~/path"));
+	                       p11_path_expand ("~/my/path"));
 	check_equals_and_free ("C:\\Users\\blah\\path",
 	                       p11_path_expand ("~\\path"));
-
-	putenv ("TEMP=C:\\Temp Directory");
-	check_equals_and_free ("C:\\Temp Directory\\path",
-	                       p11_path_expand ("$TEMP/path"));
-	check_equals_and_free ("C:\\Temp Directory\\path",
-	                       p11_path_expand ("$TEMP\\path"));
 #endif
 
 	putenv("HOME=");
-	path = p11_path_expand ("$HOME/this/is/my/path");
-	assert (strstr (path, "this/is/my/path") != NULL);
-	free (path);
-
-	putenv("HOME=");
 	path = p11_path_expand ("~/this/is/my/path");
 	assert (strstr (path, "this/is/my/path") != NULL);
 	free (path);
-
-	putenv("TEMP=");
-	path = p11_path_expand ("$TEMP/this/is/my/path");
-	assert (strstr (path, "this/is/my/path") != NULL);
-	free (path);
 }
 
 static void