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e38a1e2b VB |
1 | /* $NetBSD: getpass.c,v 1.15 2003/08/07 16:42:50 agc Exp $ */ |
2 | /* | |
3 | * Copyright (c) 1988, 1993 | |
4 | * The Regents of the University of California. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * 3. Neither the name of the University nor the names of its contributors | |
15 | * may be used to endorse or promote products derived from this software | |
16 | * without specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
28 | * SUCH DAMAGE. | |
29 | */ | |
30 | #if 0 | |
31 | #include <sys/cdefs.h> | |
32 | #if defined(LIBC_SCCS) && !defined(lint) | |
33 | #if 0 | |
34 | static char sccsid[] = "@(#)getpass.c 8.1 (Berkeley) 6/4/93"; | |
35 | #else | |
36 | __RCSID("$NetBSD: getpass.c,v 1.15 2003/08/07 16:42:50 agc Exp $"); | |
37 | #endif | |
38 | #endif /* LIBC_SCCS and not lint */ | |
39 | #include "namespace.h" | |
40 | #endif | |
41 | #include <assert.h> | |
42 | #include <paths.h> | |
43 | #include <pwd.h> | |
44 | #include <signal.h> | |
45 | #include <stdio.h> | |
46 | #include <termios.h> | |
47 | #include <unistd.h> | |
48 | #if 0 | |
49 | #ifdef __weak_alias | |
50 | __weak_alias(getpass,_getpass) | |
51 | #endif | |
52 | #endif | |
53 | char * | |
54 | getpass(prompt) | |
55 | const char *prompt; | |
56 | { | |
57 | struct termios term; | |
58 | int ch; | |
59 | char *p; | |
60 | FILE *fp, *outfp; | |
61 | int echo; | |
62 | static char buf[_PASSWORD_LEN + 1]; | |
63 | sigset_t oset, nset; | |
64 | #if 0 | |
65 | _DIAGASSERT(prompt != NULL); | |
66 | #endif | |
67 | /* | |
68 | * read and write to /dev/tty if possible; else read from | |
69 | * stdin and write to stderr. | |
70 | */ | |
71 | if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) { | |
72 | outfp = stderr; | |
73 | fp = stdin; | |
74 | } | |
75 | /* | |
76 | * note - blocking signals isn't necessarily the | |
77 | * right thing, but we leave it for now. | |
78 | */ | |
79 | sigemptyset(&nset); | |
80 | sigaddset(&nset, SIGINT); | |
81 | sigaddset(&nset, SIGTSTP); | |
82 | (void)sigprocmask(SIG_BLOCK, &nset, &oset); | |
83 | (void)tcgetattr(fileno(fp), &term); | |
84 | if ((echo = (term.c_lflag & ECHO)) != 0) { | |
85 | term.c_lflag &= ~ECHO; | |
86 | (void)tcsetattr(fileno(fp), TCSAFLUSH /*|TCSASOFT*/, &term); | |
87 | } | |
88 | if (prompt != NULL) | |
89 | (void)fputs(prompt, outfp); | |
90 | rewind(outfp); /* implied flush */ | |
91 | for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';) | |
92 | if (p < buf + _PASSWORD_LEN) | |
93 | *p++ = ch; | |
94 | *p = '\0'; | |
95 | (void)write(fileno(outfp), "\n", 1); | |
96 | if (echo) { | |
97 | term.c_lflag |= ECHO; | |
98 | (void)tcsetattr(fileno(fp), TCSAFLUSH/*|TCSASOFT*/, &term); | |
99 | } | |
100 | (void)sigprocmask(SIG_SETMASK, &oset, NULL); | |
101 | if (fp != stdin) | |
102 | (void)fclose(fp); | |
103 | return(buf); | |
104 | } |