plugins/python/regress: adds tests for python plugin feature and examples

plugins/python/regress/iohelpers.h

@@ -0,0 +1,36 @@
+#ifndef PYTHON_IO_HELPERS
+#define PYTHON_IO_HELPERS
+
+#include "config.h"
+#include "sudo_compat.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <signal.h>
+#include <pwd.h>
+
+#include <stdbool.h>
+
+#define MAX_OUTPUT (2 << 16)
+
+int rmdir_recursive(const char *path);
+
+int fwriteall(const char *file_path, const char *string);
+int freadall(const char *file_path, char *output, size_t max_len);
+
+// allocates new string with the content of 'string' but 'old' replaced to 'new'
+// The allocated array will be dest_length size and null terminated correctly.
+char *str_replaced(const char *string, size_t dest_length, const char *old, const char *new);
+
+// same, but "string" must be able to store 'max_length' number of characters including the null terminator
+void str_replace_in_place(char *string, size_t max_length, const char *old, const char *new);
+
+int vsnprintf_append(char *output, size_t max_output_len, const char *fmt, va_list args);
+int snprintf_append(char *output, size_t max_output_len, const char *fmt, ...);
+
+int str_array_count(char **str_array);
+void str_array_snprint(char *out_str, size_t max_len, char **str_array, int array_len);
+
+#endif