Ultrix-3.1/src/ucb/ftp/getpass.c

/**********************************************************************
 *   Copyright (c) Digital Equipment Corporation 1984, 1985, 1986.    *
 *   All Rights Reserved. 					      *
 *   Reference "/usr/src/COPYRIGHT" for applicable restrictions.      *
 **********************************************************************/


static char Sccsid[] = "@(#)getpass.c	3.0	4/22/86";
/*
 * Based on:
 *
 * "@(#)getpass.c	4.1 (Berkeley) 5/26/83";
 */

#include <stdio.h>
#ifdef	pdp11
#define	signal	sigset
#endif	pdp11
#include <signal.h>
#include <sgtty.h>

char *
getpass(prompt)
char *prompt;
{
	struct sgttyb ttyb;
	int flags;
	register char *p;
	register c;
	FILE *fi;
	static char pbuf[9];
	int (*signal())();
	int (*sig)();

	if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL)
		fi = stdin;
	else
		setbuf(fi, (char *)NULL);
	sig = signal(SIGINT, SIG_IGN);
	gtty(fileno(fi), &ttyb);
	flags = ttyb.sg_flags;
	ttyb.sg_flags &= ~ECHO;
	stty(fileno(fi), &ttyb);
	fprintf(stderr, "%s", prompt); fflush(stderr);
	for (p=pbuf; (c = getc(fi))!='\n' && c!=EOF;) {
		if (p < &pbuf[8])
			*p++ = c;
	}
	*p = '\0';
	fprintf(stderr, "\n"); fflush(stderr);
	ttyb.sg_flags = flags;
	stty(fileno(fi), &ttyb);
	signal(SIGINT, sig);
	if (fi != stdin)
		fclose(fi);
	return(pbuf);
}