Add unit tests for openpam_straddch(3).

t/.gitignore

@@ -1,10 +1,7 @@
+/t_*.trs
 /t_openpam_ctype
-/t_openpam_ctype.trs
 /t_openpam_dispatch
-/t_openpam_dispatch.trs
 /t_openpam_readlinev
-/t_openpam_readlinev.trs
 /t_openpam_readword
-/t_openpam_readword.trs
+/t_openpam_straddch
 /t_pam_env
-/t_pam_env.trs

t/Makefile.am

@@ -12,6 +12,7 @@ TESTS += t_openpam_ctype
 TESTS += t_openpam_dispatch
 TESTS += t_openpam_readword
 TESTS += t_openpam_readlinev
+TESTS += t_openpam_straddch
 TESTS += t_pam_env
 check_PROGRAMS = $(TESTS)
 

t/t_openpam_straddch.c

@@ -0,0 +1,184 @@
+/*-
+ * Copyright (c) 2021 Dag-Erling Smørgrav
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <cryb/test.h>
+
+#include <security/pam_appl.h>
+#include "openpam_impl.h"
+
+static int
+t_straddch_empty(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
+{
+	char *str;
+	size_t size, len;
+	int ret;
+
+	str = NULL;
+	size = len = SIZE_MAX;
+	ret = t_is_zero_i(openpam_straddch(&str, &size, &len, '\0'));
+	ret &= t_is_not_null(str);
+	ret &= t_is_not_zero_sz(size);
+	ret &= t_is_zero_sz(len);
+	free(str);
+	return ret;
+}
+
+static int
+t_straddch_alloc_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
+{
+	char *str;
+	size_t size, len;
+	int ret;
+
+	str = NULL;
+	size = len = SIZE_MAX;
+	errno = 0;
+	t_malloc_fail = 1;
+	ret = t_compare_i(-1, openpam_straddch(&str, &size, &len, '\0'));
+	t_malloc_fail = 0;
+	ret &= t_compare_i(ENOMEM, errno);
+	ret &= t_is_null(str);
+	ret &= t_compare_sz(SIZE_MAX, size);
+	ret &= t_compare_sz(SIZE_MAX, len);
+	free(str);
+	return ret;
+}
+
+static int
+t_straddch_realloc_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
+{
+	char *str, *_str;
+	size_t size, _size, len, _len;
+	int i, ret;
+
+	// start with an empty string
+	str = NULL;
+	size = len = SIZE_MAX;
+	ret = t_is_zero_i(openpam_straddch(&str, &size, &len, '\0'));
+	ret &= t_is_not_null(str);
+	ret &= t_is_not_zero_sz(size);
+	ret &= t_is_zero_sz(len);
+	if (!ret)
+		goto end;
+	// repeatedly append to it until allocation fails
+	errno = 0;
+	_str = str;
+	_size = size;
+	_len = len;
+	t_malloc_fail = 1;
+	for (i = 0; i < 4096; i++) {
+		if ((ret = openpam_straddch(&str, &size, &len, 'x')) != 0)
+			break;
+		_size = size;
+		_len = len;
+	}
+	t_malloc_fail = 0;
+	ret = t_compare_i(-1, ret);
+	ret &= t_compare_i(ENOMEM, errno);
+	ret &= t_compare_ptr(_str, str);
+	ret &= t_compare_sz(_size, size);
+	ret &= t_compare_sz(_len, len);
+end:
+	free(str);
+	return ret;
+}
+
+static int
+t_straddch_realloc_ok(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
+{
+	char *str, *_str;
+	size_t size, _size, len, _len;
+	int i, ret;
+
+	// start with an empty string
+	str = NULL;
+	size = len = SIZE_MAX;
+	ret = t_is_zero_i(openpam_straddch(&str, &size, &len, '\0'));
+	ret &= t_is_not_null(str);
+	ret &= t_is_not_zero_sz(size);
+	ret &= t_is_zero_sz(len);
+	if (!ret)
+		goto end;
+	// repeatedly append to it until size changes
+	_str = str;
+	_size = size;
+	_len = len;
+	for (i = ' '; i <= '~'; i++) { // assume ascii
+		if ((ret = openpam_straddch(&str, &size, &len, i)) != 0)
+			break;
+		if (size != _size)
+			break;
+		if (len != _len + 1)
+			break;
+		_len = len;
+	}
+	ret = t_is_zero_i(ret);
+	if (!ret)
+		goto end;
+	ret &= t_compare_sz(_len + 1, len);
+	ret &= t_compare_sz(_size * 2, size);
+	ret &= t_compare_i(i, str[_len]);
+	ret &= t_is_zero_i(str[len]);
+end:
+	free(str);
+	return ret;
+}
+
+
+/***************************************************************************
+ * Boilerplate
+ */
+
+static int
+t_prepare(int argc CRYB_UNUSED, char *argv[] CRYB_UNUSED)
+{
+
+	t_add_test(t_straddch_empty, NULL, "empty string");
+	t_add_test(t_straddch_alloc_fail, NULL, "allocation failure");
+	t_add_test(t_straddch_realloc_fail, NULL, "reallocation failure");
+	t_add_test(t_straddch_realloc_ok, NULL, "reallocation success");
+	return (0);
+}
+
+int
+main(int argc, char *argv[])
+{
+
+	t_main(t_prepare, NULL, argc, argv);
+}