UI_STRING - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEUI_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
SYNOPSIS​ #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);
DESCRIPTIONThe UI_STRING gets created internally and added to a UI whenever one of the functions UI_add_input_string(), UI_dup_input_string(), ​UI_add_verify_string(), UI_dup_verify_string(), ​UI_add_input_boolean(), UI_dup_input_boolean(), UI_add_info_string(), ​UI_dup_info_string(), UI_add_error_string() or UI_dup_error_string() is called. For a UI_METHOD user, there's no need to know more. For a UI_METHOD creator, it is of interest to fetch text from these ​UI_STRING objects as well as adding results to some of them. ​UI_get_string_type() is used to retrieve the type of the given ​UI_STRING. ​UI_get_input_flags() is used to retrieve the flags associated with the given UI_STRING. ​UI_get0_output_string() is used to retrieve the actual string to output (prompt, info, error, ...). ​UI_get0_action_string() is used to retrieve the action description associated with a UIT_BOOLEAN type UI_STRING. For all other UI_STRING types, NULL is returned. See UI_add_input_boolean (3). ​UI_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 UIT_PROMPT and UIT_VERIFY type strings. For all other UI_STRING types, UI_get0_result_string() returns NULL and UI_get_result_string_length() returns −1. ​UI_get0_test_string() is used to retrieve the string to compare the prompt result with. This is only useful for UIT_VERIFY type strings. For all other UI_STRING types, NULL is returned. ​UI_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 UIT_PROMPT and UIT_VERIFY type strings. For all other UI_STRING types, −1 is returned. ​UI_set_result_ex() is used to set the result value of a prompt and its length. For UIT_PROMPT and UIT_VERIFY type UI 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 UIT_BOOLEAN type UI strings, this sets the first character of the result retrievable with UI_get0_result_string() to the first ​ok_char given with UI_add_input_boolean() or UI_dup_input_boolean() if the result matched any of them, or the first of the ​cancel_chars if the result matched any of them, otherwise it's set to the NUL char \0. See UI_add_input_boolean (3) for more information on ok_chars and ​cancel_chars. ​UI_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 NUL byte, and is therefore only useful with normal C strings.
RETURN VALUES​UI_get_string_type() returns the UI string type. ​UI_get_input_flags() returns the UI string flags. ​UI_get0_output_string() returns the UI string output string. ​UI_get0_action_string() returns the UI string action description string for UIT_BOOLEAN type UI strings, NULL for any other type. ​UI_get0_result_string() returns the UI string result buffer for ​UIT_PROMPT and UIT_VERIFY type UI strings, NULL for any other type. ​UI_get_result_string_length() returns the UI string result buffer's content length for UIT_PROMPT and UIT_VERIFY type UI strings, ​−1 for any other type. ​UI_get0_test_string() returns the UI string action description string for UIT_VERIFY type UI strings, NULL for any other type. ​UI_get_result_minsize() returns the minimum allowed result size for the UI string for UIT_PROMPT and UIT_VERIFY type strings, ​−1 for any other type. ​UI_get_result_maxsize() returns the minimum allowed result size for the UI string for UIT_PROMPT and UIT_VERIFY type strings, ​−1 for any other type. ​UI_set_result() returns 0 on success or when the UI string is of any type other than UIT_PROMPT, UIT_VERIFY or UIT_BOOLEAN, −1 on error.
SEE ALSO​UI (3)
COPYRIGHTCopyright 2001−2018 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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