tests: Introduce functions to change directories

This introduces torture_get_current_working_dir() and
torture_change_dir() to allow changing directories in tests.

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/torture.c

@@ -39,11 +39,13 @@
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #elif (defined _WIN32) || (defined _WIN64)
+#include <direct.h>
 #include <io.h>
 #define read _read
 #define open _open
 #define write _write
 #define close _close
+#define chdir _chdir
 #endif
 
 #include "torture.h"
@@ -842,6 +844,28 @@ end:
     return new_file;
 }
 
+char *torture_get_current_working_dir(void)
+{
+
+    char *cwd = NULL;
+    char *result = NULL;
+
+    cwd = (char *)malloc(PATH_MAX + 1);
+    if (cwd == NULL) {
+        goto end;
+    }
+
+    result = getcwd(cwd, PATH_MAX);
+
+    if (result == NULL) {
+        SAFE_FREE(cwd);
+        goto end;
+    }
+
+end:
+    return cwd;
+}
+
 #else /* _WIN32 */
 
 char *torture_make_temp_dir(const char *template)
@@ -1072,8 +1096,44 @@ end:
     return path;
 }
 
+char *torture_get_current_working_dir(void)
+{
+    char *cwd = NULL;
+    char *result = NULL;
+
+    cwd = (char *)malloc(_MAX_PATH + 1);
+    if (cwd == NULL) {
+        goto end;
+    }
+
+    result = _getcwd(cwd, _MAX_PATH);
+
+    if (result == NULL) {
+        SAFE_FREE(cwd);
+        goto end;
+    }
+
+end:
+    return cwd;
+}
+
 #endif /* _WIN32 */
 
+int torture_change_dir(char *path)
+{
+    int rc = 0;
+
+    if (path == NULL) {
+        rc = -1;
+        goto end;
+    }
+
+    rc = chdir(path);
+
+end:
+    return rc;
+}
+
 int torture_libssh_verbosity(void){
   return verbosity;
 }

tests/torture.h

@@ -128,4 +128,7 @@ int torture_run_tests(void);
 char *torture_make_temp_dir(const char *template);
 char *torture_create_temp_file(const char *template);
 
+char *torture_get_current_working_dir(void);
+int torture_change_dir(char *path);
+
 #endif /* _TORTURE_H */

tests/unittests/CMakeLists.txt

@@ -18,6 +18,7 @@ set(LIBSSH_UNIT_TESTS
     torture_packet_filter
     torture_temp_dir
     torture_temp_file
+    torture_push_pop_dir
 )
 
 set(LIBSSH_THREAD_UNIT_TESTS

tests/unittests/torture_push_pop_dir.c

@@ -0,0 +1,78 @@
+#include "config.h"
+
+#include "torture.h"
+#define LIBSSH_STATIC
+
+const char template[] = "temp_dir_XXXXXX";
+
+static int setup(void **state)
+{
+    char *temp_dir = NULL;
+
+    temp_dir = torture_make_temp_dir(template);
+    assert_non_null(temp_dir);
+
+    *state = (void *)temp_dir;
+
+    return 0;
+}
+
+static int teardown(void **state)
+{
+    char *temp_dir = *((char **)state);
+
+    torture_rmdirs((const char *)temp_dir);
+
+    free(temp_dir);
+
+    return 0;
+}
+
+static void torture_back_and_forth(void **state)
+{
+    char *temp_dir = *((char **)state);
+    char *cwd = NULL;
+    char *after_change = NULL;
+    char *after_changing_back = NULL;
+    int rc = 0;
+
+    cwd = torture_get_current_working_dir();
+    assert_non_null(cwd);
+
+    printf("Current dir: %s\n", cwd);
+
+    rc = torture_change_dir(temp_dir);
+    assert_int_equal(rc, 0);
+
+    after_change = torture_get_current_working_dir();
+    assert_non_null(after_change);
+
+    printf("Current dir after change: %s\n", after_change);
+
+    rc = torture_change_dir(cwd);
+    assert_int_equal(rc, 0);
+
+    after_changing_back = torture_get_current_working_dir();
+    assert_non_null(after_changing_back);
+
+    printf("Back to dir: %s\n", after_changing_back);
+
+    SAFE_FREE(cwd);
+    SAFE_FREE(after_change);
+    SAFE_FREE(after_changing_back);
+}
+
+int torture_run_tests(void)
+{
+    int rc;
+    struct CMUnitTest tests[] = {
+        cmocka_unit_test_setup_teardown(torture_back_and_forth,
+                                        setup, teardown),
+    };
+
+    torture_filter_tests(tests);
+    rc = cmocka_run_group_tests(tests, NULL, NULL);
+
+    return rc;
+}
+