xref: /illumos-gate/usr/src/cmd/cmd-inet/usr.bin/ftp/getpass.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  *	Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
24  *	Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	All Rights Reserved  	*/
29 
30 /*
31  *	University Copyright- Copyright (c) 1982, 1986, 1988
32  *	The Regents of the University of California
33  *	All Rights Reserved
34  *
35  *	University Acknowledgment- Portions of this document are derived from
36  *	software developed by the University of California, Berkeley, and its
37  *	contributors.
38  */
39 
40 #include "ftp_var.h"
41 
42 static	struct termios termios_b;
43 static	tcflag_t flags;
44 static	FILE *fi;
45 
46 /* ARGSUSED */
47 static void
48 intfix(int sig)
49 {
50 	termios_b.c_lflag = flags;
51 	(void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
52 	exit(EXIT_FAILURE);
53 }
54 
55 char *
56 mygetpass(char *prompt)
57 {
58 	register char *p;
59 	register int c;
60 	static char pbuf[50+1];
61 	void (*sig)();
62 
63 	stop_timer();
64 	if ((fi = fopen("/dev/tty", "r")) == NULL)
65 		fi = stdin;
66 	else
67 		setbuf(fi, (char *)NULL);
68 
69 	if (tcgetattr(fileno(fi), &termios_b) < 0)
70 		perror("ftp: tcgetattr");	/* go ahead, anyway */
71 	flags = termios_b.c_lflag;
72 
73 	sig = signal(SIGINT, intfix);
74 
75 	termios_b.c_lflag &= ~ECHO;
76 	(void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
77 	(void) fprintf(stderr, "%s", prompt);
78 	(void) fflush(stderr);
79 	p = pbuf;
80 	while ((c = getc(fi)) != '\n' && c != EOF) {
81 		if (p < &pbuf[sizeof (pbuf)-1])
82 			*p++ = c;
83 	}
84 	*p = '\0';
85 	(void) fprintf(stderr, "\n");
86 	(void) fflush(stderr);
87 	termios_b.c_lflag = flags;
88 	(void) tcsetattr(fileno(fi), TCSADRAIN, &termios_b);
89 	(void) signal(SIGINT, sig);
90 	if (fi != stdin)
91 		(void) fclose(fi);
92 	reset_timer();
93 	return (pbuf);
94 }
95