/* * 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. 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 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include 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(_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(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; (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term); } (void)sigsetmask(omask); if (fp != stdin) (void)fclose(fp); return(buf); }