102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
#ifndef _NO_GETPASS
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/*
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* Copyright (c) 1988 The Regents of the University of California.
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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
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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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* 4. 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)getpass.c 5.9 (Berkeley) 5/6/91";
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#endif /* LIBC_SCCS and not lint */
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#include <stdio.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <sys/termios.h>
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#include <sys/signal.h>
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#include <_syslist.h>
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#ifndef _PATH_PASSWD
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#define _PATH_PASSWD "/etc/passwd"
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#endif
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#ifndef _PASSWORD_LEN
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#define _PASSWORD_LEN 128 /* max length, not counting NULL */
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#endif
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char *
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getpass (prompt)
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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 + 1];
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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 ("/dev/tty", "w+")) == NULL)
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{
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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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echo = (term.c_lflag & ECHO);
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if (echo)
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{
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term.c_lflag &= ~ECHO;
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(void) tcsetattr (fileno (fp), TCSAFLUSH, &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)
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*p++ = ch;
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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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{
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term.c_lflag |= ECHO;
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tcsetattr (fileno (fp), TCSAFLUSH, &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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}
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#endif /* !_NO_GETPASS */
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