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- /*
- * Copyright (c) 1988 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)getpass.c 5.9 (Berkeley) 5/6/91";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/termios.h>
- #include <sys/signal.h>
- #include <stdio.h>
- #include <unistd.h>
- #include <pwd.h>
-
- char *
- getpass(prompt)
- const char *prompt;
- {
- struct termios term;
- register int ch;
- register char *p;
- FILE *fp, *outfp;
- long omask;
- int echo;
- static char buf[_PASSWORD_LEN + 1];
-
- /*
- * read and write to /dev/tty if possible; else read from
- * stdin and write to stderr.
- */
- if ((outfp = fp = fopen("/dev/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)) {
- 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)
- *p++ = ch;
- *p = '\0';
- (void)write(fileno(outfp), "\n", 1);
- if (echo) {
- term.c_lflag |= ECHO;
- tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
- }
- (void)sigsetmask(omask);
- if (fp != stdin)
- (void)fclose(fp);
- return(buf);
- }
-