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Title "UI_STRING 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
UI_STRING, UI_string_types, UI_get_string_type, UI_get_input_flags, UI_get0_output_string, UI_get0_action_string, UI_get0_result_string, UI_get_result_string_length, UI_get0_test_string, UI_get_result_minsize, UI_get_result_maxsize, UI_set_result, UI_set_result_ex \- User interface string parsing Header "SYNOPSIS" .Vb 1 #include <openssl/ui.h> \& typedef struct ui_string_st UI_STRING; \& enum UI_string_types { UIT_NONE = 0, UIT_PROMPT, /* Prompt for a string */ UIT_VERIFY, /* Prompt for a string and verify */ UIT_BOOLEAN, /* Prompt for a yes/no response */ UIT_INFO, /* Send info to the user */ UIT_ERROR /* Send an error message to the user */ }; \& enum UI_string_types UI_get_string_type(UI_STRING *uis); int UI_get_input_flags(UI_STRING *uis); const char *UI_get0_output_string(UI_STRING *uis); const char *UI_get0_action_string(UI_STRING *uis); const char *UI_get0_result_string(UI_STRING *uis); int UI_get_result_string_length(UI_STRING *uis); const char *UI_get0_test_string(UI_STRING *uis); int UI_get_result_minsize(UI_STRING *uis); int UI_get_result_maxsize(UI_STRING *uis); int UI_set_result(UI *ui, UI_STRING *uis, const char *result); int UI_set_result_ex(UI *ui, UI_STRING *uis, const char *result, int len); .Ve Header "DESCRIPTION" The \s-1UI_STRING\s0 gets created internally and added to a \s-1UI\s0 whenever one of the functions UI_add_input_string(), UI_dup_input_string(), \fBUI_add_verify_string(), UI_dup_verify_string(), \fBUI_add_input_boolean(), UI_dup_input_boolean(), UI_add_info_string(), \fBUI_dup_info_string(), UI_add_error_string() or UI_dup_error_string() is called. For a \s-1UI_METHOD\s0 user, there's no need to know more. For a \s-1UI_METHOD\s0 creator, it is of interest to fetch text from these \fB\s-1UI_STRING\s0 objects as well as adding results to some of them.

\fBUI_get_string_type() is used to retrieve the type of the given \fB\s-1UI_STRING\s0.

\fBUI_get_input_flags() is used to retrieve the flags associated with the given \s-1UI_STRING\s0.

\fBUI_get0_output_string() is used to retrieve the actual string to output (prompt, info, error, ...).

\fBUI_get0_action_string() is used to retrieve the action description associated with a \s-1UIT_BOOLEAN\s0 type \s-1UI_STRING\s0. For all other \s-1UI_STRING\s0 types, \s-1NULL\s0 is returned. See UI_add_input_boolean\|(3).

\fBUI_get0_result_string() and UI_get_result_string_length() are used to retrieve the result of a prompt and its length. This is only useful for \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type strings. For all other \s-1UI_STRING\s0 types, UI_get0_result_string() returns \s-1NULL\s0 and UI_get_result_string_length() returns -1.

\fBUI_get0_test_string() is used to retrieve the string to compare the prompt result with. This is only useful for \s-1UIT_VERIFY\s0 type strings. For all other \s-1UI_STRING\s0 types, \s-1NULL\s0 is returned.

\fBUI_get_result_minsize() and UI_get_result_maxsize() are used to retrieve the minimum and maximum required size of the result. This is only useful for \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type strings. For all other \s-1UI_STRING\s0 types, -1 is returned.

\fBUI_set_result_ex() is used to set the result value of a prompt and its length. For \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type \s-1UI\s0 strings, this sets the result retrievable with UI_get0_result_string() by copying the contents of result if its length fits the minimum and maximum size requirements. For \s-1UIT_BOOLEAN\s0 type \s-1UI\s0 strings, this sets the first character of the result retrievable with UI_get0_result_string() to the first \fBok_char given with UI_add_input_boolean() or UI_dup_input_boolean() if the result matched any of them, or the first of the \fBcancel_chars if the result matched any of them, otherwise it's set to the \s-1NUL\s0 char \*(C`\e0\*(C'. See UI_add_input_boolean\|(3) for more information on ok_chars and \fBcancel_chars.

\fBUI_set_result() does the same thing as UI_set_result_ex(), but calculates its length internally. It expects the string to be terminated with a \s-1NUL\s0 byte, and is therefore only useful with normal C strings.

Header "RETURN VALUES" \fBUI_get_string_type() returns the \s-1UI\s0 string type.

\fBUI_get_input_flags() returns the \s-1UI\s0 string flags.

\fBUI_get0_output_string() returns the \s-1UI\s0 string output string.

\fBUI_get0_action_string() returns the \s-1UI\s0 string action description string for \s-1UIT_BOOLEAN\s0 type \s-1UI\s0 strings, \s-1NULL\s0 for any other type.

\fBUI_get0_result_string() returns the \s-1UI\s0 string result buffer for \fB\s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type \s-1UI\s0 strings, \s-1NULL\s0 for any other type.

\fBUI_get_result_string_length() returns the \s-1UI\s0 string result buffer's content length for \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type \s-1UI\s0 strings, \-1 for any other type.

\fBUI_get0_test_string() returns the \s-1UI\s0 string action description string for \s-1UIT_VERIFY\s0 type \s-1UI\s0 strings, \s-1NULL\s0 for any other type.

\fBUI_get_result_minsize() returns the minimum allowed result size for the \s-1UI\s0 string for \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type strings, \-1 for any other type.

\fBUI_get_result_maxsize() returns the minimum allowed result size for the \s-1UI\s0 string for \s-1UIT_PROMPT\s0 and \s-1UIT_VERIFY\s0 type strings, \-1 for any other type.

\fBUI_set_result() returns 0 on success or when the \s-1UI\s0 string is of any type other than \s-1UIT_PROMPT\s0, \s-1UIT_VERIFY\s0 or \s-1UIT_BOOLEAN\s0, -1 on error.

Header "SEE ALSO" \s-1UI\s0\|(3) Header "COPYRIGHT" Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.