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/*
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 * Copyright (c) 1988, 1993
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 *        The Regents of the University of California.  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
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * 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
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS 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
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/* modified for Prex by Kohsuke Ohtani. */
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#include <sys/termios.h>
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#include <signal.h>
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#include <paths.h>
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#include <stdio.h>
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#include <unistd.h>
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char *
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getpass(const char *prompt)
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{
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        struct termios term;
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        register int ch;
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        register char *p;
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        FILE *fp, *outfp;
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        long omask;
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        int echo;
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        static char buf[PASSWORD_LEN + 2];
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        /*
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         * read and write to /dev/tty if possible; else read from
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         * stdin and write to stderr.
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         */
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        if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) {
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                outfp = stderr;
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                fp = stdin;
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        }
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        /*
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         * note - blocking signals isn't necessarily the
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         * right thing, but we leave it for now.
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         */
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        omask = sigblock(sigmask(SIGINT)|sigmask(SIGTSTP));
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        (void)tcgetattr(fileno(fp), &term);
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        if ((echo = (term.c_lflag & ECHO)) != 0) {
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                term.c_lflag &= ~ECHO;
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                (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
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        }
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        (void)fputs(prompt, outfp);
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        rewind(outfp);                        /* implied flush */
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        for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';) {
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                if (p < buf + PASSWORD_LEN + 1)
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                        *p++ = ch;
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        }
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        *p = '\0';
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        (void)write(fileno(outfp), "\n", 1);
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        if (echo) {
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                term.c_lflag |= ECHO;
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                (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
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        }
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        (void)sigsetmask(omask);
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        if (fp != stdin)
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                (void)fclose(fp);
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        return(buf);
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}