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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* An implementation of getpass for systems that lack one.
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*
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* Copyright (C) 2013 Roman Donchenko
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, visit the http://fsf.org website.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include "rsync.h"
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char *getpass(const char *prompt)
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{
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static char password[256];
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BOOL tty_changed = False, read_success;
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struct termios tty_old, tty_new;
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FILE *in = stdin, *out = stderr;
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FILE *tty = fopen("/dev/tty", "w+");
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if (tty)
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in = out = tty;
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if (tcgetattr(fileno(in), &tty_old) == 0) {
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tty_new = tty_old;
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tty_new.c_lflag &= ~(ECHO | ISIG);
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if (tcsetattr(fileno(in), TCSAFLUSH, &tty_new) == 0)
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tty_changed = True;
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}
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if (!tty_changed)
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fputs("(WARNING: will be visible) ", out);
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fputs(prompt, out);
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fflush(out);
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read_success = fgets(password, sizeof password, in) != NULL;
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/* Print the newline that hasn't been echoed. */
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fputc('\n', out);
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if (tty_changed)
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tcsetattr(fileno(in), TCSAFLUSH, &tty_old);
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if (tty)
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fclose(tty);
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if (read_success) {
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/* Remove the trailing newline. */
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size_t password_len = strlen(password);
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if (password_len && password[password_len - 1] == '\n')
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password[password_len - 1] = '\0';
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return password;
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}
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return NULL;
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}
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