271 lines
10 KiB
Groff
Executable File
271 lines
10 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "UI_STRING 3"
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.TH UI_STRING 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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UI_STRING, UI_string_types, UI_get_string_type,
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UI_get_input_flags, UI_get0_output_string,
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UI_get0_action_string, UI_get0_result_string, UI_get_result_string_length,
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UI_get0_test_string, UI_get_result_minsize,
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UI_get_result_maxsize, UI_set_result, UI_set_result_ex
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\&\- User interface string parsing
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ui.h>
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\&
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\& typedef struct ui_string_st UI_STRING;
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\&
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\& enum UI_string_types {
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\& UIT_NONE = 0,
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\& UIT_PROMPT, /* Prompt for a string */
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\& UIT_VERIFY, /* Prompt for a string and verify */
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\& UIT_BOOLEAN, /* Prompt for a yes/no response */
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\& UIT_INFO, /* Send info to the user */
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\& UIT_ERROR /* Send an error message to the user */
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\& };
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\&
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\& enum UI_string_types UI_get_string_type(UI_STRING *uis);
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\& int UI_get_input_flags(UI_STRING *uis);
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\& const char *UI_get0_output_string(UI_STRING *uis);
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\& const char *UI_get0_action_string(UI_STRING *uis);
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\& const char *UI_get0_result_string(UI_STRING *uis);
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\& int UI_get_result_string_length(UI_STRING *uis);
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\& const char *UI_get0_test_string(UI_STRING *uis);
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\& int UI_get_result_minsize(UI_STRING *uis);
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\& int UI_get_result_maxsize(UI_STRING *uis);
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\& int UI_set_result(UI *ui, UI_STRING *uis, const char *result);
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\& int UI_set_result_ex(UI *ui, UI_STRING *uis, const char *result, int len);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fB\s-1UI_STRING\s0\fR gets created internally and added to a \fB\s-1UI\s0\fR whenever
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one of the functions \fIUI_add_input_string()\fR, \fIUI_dup_input_string()\fR,
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\&\fIUI_add_verify_string()\fR, \fIUI_dup_verify_string()\fR,
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\&\fIUI_add_input_boolean()\fR, \fIUI_dup_input_boolean()\fR, \fIUI_add_info_string()\fR,
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\&\fIUI_dup_info_string()\fR, \fIUI_add_error_string()\fR or \fIUI_dup_error_string()\fR
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is called.
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For a \fB\s-1UI_METHOD\s0\fR user, there's no need to know more.
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For a \fB\s-1UI_METHOD\s0\fR creator, it is of interest to fetch text from these
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\&\fB\s-1UI_STRING\s0\fR objects as well as adding results to some of them.
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.PP
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\&\fIUI_get_string_type()\fR is used to retrieve the type of the given
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\&\fB\s-1UI_STRING\s0\fR.
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.PP
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\&\fIUI_get_input_flags()\fR is used to retrieve the flags associated with the
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given \fB\s-1UI_STRING\s0\fR.
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.PP
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\&\fIUI_get0_output_string()\fR is used to retrieve the actual string to
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output (prompt, info, error, ...).
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.PP
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\&\fIUI_get0_action_string()\fR is used to retrieve the action description
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associated with a \fB\s-1UIT_BOOLEAN\s0\fR type \fB\s-1UI_STRING\s0\fR.
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For all other \fB\s-1UI_STRING\s0\fR types, \s-1NULL\s0 is returned.
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See \fIUI_add_input_boolean\fR\|(3).
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.PP
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\&\fIUI_get0_result_string()\fR and \fIUI_get_result_string_length()\fR are used to
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retrieve the result of a prompt and its length.
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This is only useful for \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type strings.
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For all other \fB\s-1UI_STRING\s0\fR types, \fIUI_get0_result_string()\fR returns \s-1NULL\s0
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and \fIUI_get_result_string_length()\fR returns \-1.
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.PP
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\&\fIUI_get0_test_string()\fR is used to retrieve the string to compare the
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prompt result with.
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This is only useful for \fB\s-1UIT_VERIFY\s0\fR type strings.
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For all other \fB\s-1UI_STRING\s0\fR types, \s-1NULL\s0 is returned.
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.PP
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\&\fIUI_get_result_minsize()\fR and \fIUI_get_result_maxsize()\fR are used to
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retrieve the minimum and maximum required size of the result.
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This is only useful for \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type strings.
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For all other \fB\s-1UI_STRING\s0\fR types, \-1 is returned.
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.PP
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\&\fIUI_set_result_ex()\fR is used to set the result value of a prompt and its length.
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For \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type \s-1UI\s0 strings, this sets the
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result retrievable with \fIUI_get0_result_string()\fR by copying the
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contents of \fBresult\fR if its length fits the minimum and maximum size
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requirements.
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For \fB\s-1UIT_BOOLEAN\s0\fR type \s-1UI\s0 strings, this sets the first character of
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the result retrievable with \fIUI_get0_result_string()\fR to the first
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\&\fBok_char\fR given with \fIUI_add_input_boolean()\fR or \fIUI_dup_input_boolean()\fR
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if the \fBresult\fR matched any of them, or the first of the
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\&\fBcancel_chars\fR if the \fBresult\fR matched any of them, otherwise it's
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set to the \s-1NUL\s0 char \f(CW\*(C`\e0\*(C'\fR.
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See \fIUI_add_input_boolean\fR\|(3) for more information on \fBok_chars\fR and
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\&\fBcancel_chars\fR.
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.PP
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\&\fIUI_set_result()\fR does the same thing as \fIUI_set_result_ex()\fR, but calculates
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its length internally.
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It expects the string to be terminated with a \s-1NUL\s0 byte, and is therefore
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only useful with normal C strings.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIUI_get_string_type()\fR returns the \s-1UI\s0 string type.
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.PP
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\&\fIUI_get_input_flags()\fR returns the \s-1UI\s0 string flags.
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.PP
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\&\fIUI_get0_output_string()\fR returns the \s-1UI\s0 string output string.
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.PP
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\&\fIUI_get0_action_string()\fR returns the \s-1UI\s0 string action description
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string for \fB\s-1UIT_BOOLEAN\s0\fR type \s-1UI\s0 strings, \s-1NULL\s0 for any other type.
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.PP
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\&\fIUI_get0_result_string()\fR returns the \s-1UI\s0 string result buffer for
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\&\fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type \s-1UI\s0 strings, \s-1NULL\s0 for any other
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type.
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.PP
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\&\fIUI_get_result_string_length()\fR returns the \s-1UI\s0 string result buffer's
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content length for \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type \s-1UI\s0 strings,
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\&\-1 for any other type.
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.PP
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\&\fIUI_get0_test_string()\fR returns the \s-1UI\s0 string action description
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string for \fB\s-1UIT_VERIFY\s0\fR type \s-1UI\s0 strings, \s-1NULL\s0 for any other type.
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.PP
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\&\fIUI_get_result_minsize()\fR returns the minimum allowed result size for
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the \s-1UI\s0 string for \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type strings,
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\&\-1 for any other type.
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.PP
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\&\fIUI_get_result_maxsize()\fR returns the minimum allowed result size for
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the \s-1UI\s0 string for \fB\s-1UIT_PROMPT\s0\fR and \fB\s-1UIT_VERIFY\s0\fR type strings,
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\&\-1 for any other type.
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.PP
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\&\fIUI_set_result()\fR returns 0 on success or when the \s-1UI\s0 string is of any
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type other than \fB\s-1UIT_PROMPT\s0\fR, \fB\s-1UIT_VERIFY\s0\fR or \fB\s-1UIT_BOOLEAN\s0\fR, \-1 on
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error.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\s-1\fIUI\s0\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2001\-2018 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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