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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Peter Elliott <pelliott@ualberta.ca>
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* Copyright (c) 2021, Emanuele Torre <torreemanuele6@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibCore/GetPassword.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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namespace Core {
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Result<String, OSError> get_password(const StringView& prompt)
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{
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if (write(STDOUT_FILENO, prompt.characters_without_null_termination(), prompt.length()) < 0)
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return OSError(errno);
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termios original {};
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if (tcgetattr(STDIN_FILENO, &original) < 0)
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return OSError(errno);
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termios no_echo = original;
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no_echo.c_lflag &= ~ECHO;
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &no_echo) < 0)
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return OSError(errno);
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char* password = nullptr;
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size_t n = 0;
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auto line_length = getline(&password, &n, stdin);
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auto saved_errno = errno;
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tcsetattr(STDIN_FILENO, TCSAFLUSH, &original);
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putchar('\n');
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if (line_length < 0)
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return OSError(saved_errno);
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ASSERT(line_length != 0);
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// Remove trailing '\n' read by getline().
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password[line_length - 1] = '\0';
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String s(password);
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free(password);
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return s;
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}
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}
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