Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 1988, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/* modified for Prex by Kohsuke Ohtani. */

#include <sys/termios.h>

#include <signal.h>

#include <paths.h>

#include <stdio.h>

#include <unistd.h>

char *

getpass(const char *prompt)

{

        struct termios term;

        register int ch;

        register char *p;

        FILE *fp, *outfp;

        long omask;

        int echo;

        static char buf[PASSWORD_LEN + 2];

        /*

         * read and write to /dev/tty if possible; else read from

         * stdin and write to stderr.

         */

        if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) {

                outfp = stderr;

                fp = stdin;

        }

        /*

         * note - blocking signals isn't necessarily the

         * right thing, but we leave it for now.

         */

        omask = sigblock(sigmask(SIGINT)|sigmask(SIGTSTP));

        (void)tcgetattr(fileno(fp), &term);

        if ((echo = (term.c_lflag & ECHO)) != 0) {

                term.c_lflag &= ~ECHO;

                (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);

        }

        (void)fputs(prompt, outfp);

        rewind(outfp);                        /* implied flush */

        for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';) {

                if (p < buf + PASSWORD_LEN + 1)

                        *p++ = ch;

        }

        *p = '\0';

        (void)write(fileno(outfp), "\n", 1);

        if (echo) {

                term.c_lflag |= ECHO;

                (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);

        }

        (void)sigsetmask(omask);

        if (fp != stdin)

                (void)fclose(fp);

        return(buf);

}